xcat-core/perl-xCAT/xCAT/DBobjUtils.pm

#!/usr/bin/env perl -w
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html

#####################################################
#
#   Utility subroutines that can be used to manage xCAT data object
#			definitions.
#
#
#####################################################
package xCAT::DBobjUtils;

use xCAT::NodeRange;
use xCAT::Schema;
use xCAT::Table;
use xCAT::Utils;
use xCAT::MsgUtils;
use xCAT::NetworkUtils;
use strict;

#  IPv6 not yet implemented - need Socket6
use Socket;

#----------------------------------------------------------------------------

=head3   getObjectsOfType

        Get a list of data objects of the given type.

        Arguments:
        Returns:
                undef
                @objlist - list of objects of this type
        Globals:
        Error:
        Example:
        Comments:

		@objlist = xCAT::DBobjUtils->getObjectsOfType($type);

=cut

#-----------------------------------------------------------------------------
sub getObjectsOfType
{
    my ($class, $type) = @_;

    my @objlist;

    # special case for site table
    if ($type eq 'site')
    {
        push(@objlist, 'clustersite');
        return @objlist;
    }

    if ($::saveObjList{$type})
    {
        @objlist = @{$::saveObjList{$type}};
    }
    else
    {

        # get the key for this type object
        # 	ex. for "network" type the key is "netname"
        # get the data type spec from Schema.pm
        my $datatype = $xCAT::Schema::defspec{$type};

        # get the key for this type object
        #   ex. for "network" type the key is "netname"
        my $objkey = $datatype->{'objkey'};

        my $table;
        my $tabkey;
        foreach my $this_attr (@{$datatype->{'attrs'}})
        {
            my $attr = $this_attr->{attr_name};
            if ($attr eq $objkey)
            {
                # get the table & key for to lookup
                # get the actual attr name to use in the table
                #   - may be different then the attr name used for the object.
                ($table, $tabkey) = split('\.', $this_attr->{tabentry});
                last;
            }
        }

        # get the whole table and add each entry in the objkey column
        #   to the list of objects.
        my @TableRowArray = xCAT::DBobjUtils->getDBtable($table);

        foreach (@TableRowArray)
        {
            push(@objlist, $_->{$tabkey});

        }

        # if this is type "group" we need to check the nodelist table
        my @nodeGroupList=();
        if ($type eq 'group')
        {
            my $table = "nodelist";
            my @TableRowArray = xCAT::DBobjUtils->getDBtable($table);
            foreach (@TableRowArray)
            {
                my @tmplist = split(',', $_->{'groups'});
                push(@nodeGroupList, @tmplist);
            }
            foreach my $n (@nodeGroupList)
            {
                if (!grep(/^$n$/, @objlist) ) {
                    push(@objlist, $n);
                }
            }
        }
		
        @{$::saveObjList{$type}} = @objlist;
    }

    return @objlist;
}

#----------------------------------------------------------------------------

=head3   getobjattrs

        Get data from tables 

                $type_hash: objectname=>objtype hash
                $attrs_ref: only get the specific attributes,
                            this can be useful especially for performance considerations
        Arguments:
        Returns:
                undef
                hash ref - (ex. $tabhash{$table}{$objname}{$attr} = $value)
        Globals:
        Error:
        Example:

                %tabhash = xCAT::DBobjUtils->getobjattrs(\%typehash);

        Comments:
			For now - only support tables that have 'node' as key !!!
=cut

#-----------------------------------------------------------------------------
sub getobjattrs
{
    my $class = shift;
    my $ref_hash = shift;
    my @attrs;
    # The $attrs is an optional argument
    if (ref $_[0]) {
        @attrs = @{shift()};
    }
    my %typehash = %$ref_hash;
    
    my %tableattrs;
    my %tabhash;
    
    # get a list of object names for each type
    my %objtypelist;
    foreach my $objname (sort (keys %typehash)) {
        # get list of objects for each type
        # $objtypelist{$typehash{$objname}}=$objname;
        push @{$objtypelist{$typehash{$objname}}}, $objname;
    }
    
    # go through each object type and look up all the info for each object
    foreach my $objtype (keys %objtypelist) {
    
    	  # only do node type for now 
         if ($objtype eq 'node') {
            # find the list of tables and corresponding attrs 
            #	- for this object type
            # get the object type decription from Schema.pm
            my $datatype = $xCAT::Schema::defspec{$objtype};
            foreach my $this_attr (@{$datatype->{'attrs'}}) {
                my $attr = $this_attr->{attr_name};
                if (scalar(@attrs) > 0) { # Only query specific attributes
                    if (!grep(/^$attr$/, @attrs)) {
                        next; # This attribute is not needed
                    }
                }
                
                # table_attr is the attr that actually appears in the
                #  table which could possibly be different then the attr
                #  used in the node def
                # ex. 'nodetype.arch'
                my ($lookup_table, $table_attr) = split('\.', $this_attr->{tabentry});
                if (!grep(/^$table_attr$/, @{$tableattrs{$lookup_table}})) {
                    push @{$tableattrs{$lookup_table}}, $table_attr;
                }
            }
            
            # foreach table look up the list of attrs for this 
            # list of object names
            foreach my $table (keys %tableattrs) {
                # open the table
                my $thistable = xCAT::Table->new($table, -create => 1, -autocommit => 0);
                if (!$thistable) {
                    my $rsp;
                    $rsp->{data}->[0] = "Could not get the \'$thistable\' table.";
                    xCAT::MsgUtils->message("E", $rsp, $::callback);
                }
            
                my @objlist = @{$objtypelist{$objtype}};
                
                my $rec = $thistable->getNodesAttribs(\@objlist, @{$tableattrs{$table}});
                
                # fill in %tabhash with any values that are set
                foreach my $n (@objlist) {
                	my $tmp1=$rec->{$n}->[0];
                	foreach $a (@{$tableattrs{$table}}) {
                        if (defined($tmp1->{$a})) {
                            $tabhash{$table}{$n}{$a} = $tmp1->{$a};
                            #print "obj = $n, table = $table, attr =$a, val = $tabhash{$table}{$n}{$a}\n";
                        } else {
                            # Add a has been searched flag to improve the performance
                            $tabhash{$table}{$n}{"$a"."_hassearched"} = 1;
                        }
                	}
                }
                #$thistable->commit;
            }
        }
    }
    return %tabhash;
}

#----------------------------------------------------------------------------

=head3   getobjdefs

        Get object definitions from the DB.

                $type_hash: objectname=>objtype hash
                $verbose: optional
                $attrs_ref: only get the specific attributes,
                            this can be useful especially for performance considerations
        Arguments:
        Returns:
                undef - error
                hash ref - $objecthash{objectname}{attrname} = value
        Globals:
        Error:
        Example:

		To use create hash for objectname and object type
            ex. $objhash{$obj} = $type;

        - then call as follows:
			%myhash = xCAT::DBobjUtils->getobjdefs(\%objhash);

        Comments:

=cut

#-----------------------------------------------------------------------------
sub getobjdefs
{
    my ($class, $hash_ref, $verbose, $attrs_ref) = @_;
    my %objhash;
    my %typehash = %$hash_ref;
    my %tabhash;
    my @attrs;
    if (ref($attrs_ref))
    {
        @attrs = @$attrs_ref;
    }

    @::foundTableList = ();
    
    if ($::ATTRLIST eq "none") {
        # just return the list of obj names
        foreach my $objname (sort (keys %typehash))
        {
            my $type = $typehash{$objname};
            $objhash{$objname}{'objtype'} = $type;
        }
        return %objhash;
    }

    # see if we need to get any objects of type 'node' 
    my $getnodes=0;
    foreach my $objname (keys %typehash) {
        if ($typehash{$objname} eq 'node') {
            $getnodes=1;
        }
    }

    # if so then get node info from tables now
    #   still may need to look up values in some tables using
    #   other keys - also need to figure out what tables to take
    #   values from when using 'only_if' - see below
    # - but this saves lots of time
    if ($getnodes) {
        if (scalar(@attrs) > 0) # Only get specific attributes of the node
        {
            # find the onlyif key for the attributes
            REDO: my $datatype = $xCAT::Schema::defspec{'node'};
            foreach my $this_attr (@{$datatype->{'attrs'}}) {
                my $attr = $this_attr->{attr_name};
                if (exists($this_attr->{only_if})) {
                    my ($onlyif_key, $onlyif_value) = split('\=', $this_attr->{only_if});
                    if (!grep (/^$onlyif_key$/, @attrs)) {
                        push @attrs, $onlyif_key;
                        goto REDO;
                    }
                }
            }
            %tabhash = xCAT::DBobjUtils->getobjattrs(\%typehash, \@attrs);
        }
        else
        {
            %tabhash = xCAT::DBobjUtils->getobjattrs(\%typehash);
        }
    }

    # Classify the nodes with type
    my %type_obj = ();
    foreach my $objname (keys %typehash) {
        push @{$type_obj{$typehash{$objname}}}, $objname;
    }

    foreach my $objtype (sort (keys %type_obj)) {
        if ($objtype eq 'site') {
            my @TableRowArray = xCAT::DBobjUtils->getDBtable('site');
            foreach my $objname (sort @{$type_obj{$objtype}}) {
                if (@TableRowArray)
                {
                    my $foundinfo = 0;
                    foreach (@TableRowArray)
                    {
                        if ($_->{key})
                        {
                            if (defined($_->{value}) ) {
                                $foundinfo++;
                                if ($verbose == 1) {
                                    $objhash{$objname}{$_->{key}} = "$_->{value}\t(Table:site - Key:$_->{key})";
                                } else {
                                    $objhash{$objname}{$_->{key}} = $_->{value};
                                }
                            }
                        }
                    }
                    if ($foundinfo)
                    {
                        $objhash{$objname}{'objtype'} = 'site';
                    }
                }
                else
                {
                    my $rsp;
                    $rsp->{data}->[0] ="Could not read the \'$objname\' object from the \'site\' table.";
                    xCAT::MsgUtils->message("E", $rsp, $::callback);	
                }
            }
        } elsif ($objtype eq 'monitoring') {
            # need a special case for the monitoring table
            # 	- need to check the monsetting table for entries that contain
            #	 the same name as the monitoring table entry.
            my @TableRowArray = xCAT::DBobjUtils->getDBtable('monsetting');
            foreach my $objname (sort @{$type_obj{$objtype}}) {
                if (@TableRowArray) {
                    my $foundinfo = 0;
                    foreach (@TableRowArray) {                     
                        if ($_->{name} eq $objname ) {
                            if ($_->{key})
                            {
                                if (defined($_->{value}) ) {
                                    $foundinfo++;
                                    if ($verbose == 1) {
                                        $objhash{$objname}{$_->{key}} = "$_->{value}\t(Table:monsetting)";
                                    } else {
                                        $objhash{$objname}{$_->{key}} = $_->{value};
                                    }
                                }
                            }
                        }
                    }
                    if ($foundinfo)
                    {
                        $objhash{$objname}{'objtype'} = 'monitoring';
                    }
                }
                else
                {
                    my $rsp;
                    $rsp->{data}->[0] ="Could not read the \'$objname\' object from the \'monsetting\' table.";
                    xCAT::MsgUtils->message("E", $rsp, $::callback);	
                }
            }
        } else {
            # get the object type decription from Schema.pm
            my $datatype = $xCAT::Schema::defspec{$objtype};
            # get the key to look for, for this object type
            my $objkey = $datatype->{'objkey'};

           # go through the list of valid attrs
           foreach my $this_attr (@{$datatype->{'attrs'}})
           {
                my $ent;
                my $attr = $this_attr->{attr_name};
    
                # skip the key attr  ???
                if ($attr eq $objkey)
                {
                    next;
                }
                # skip the attributes that does not needed for node type
                if ($getnodes) {
                    if (scalar(@attrs) > 0 && !grep(/^$attr$/, @attrs)) {
                        next;
                    } 
                }
 
                #  OK - get the info needed to access the DB table
                #   - i.e. table name, key name, attr names
    
                # need the actual table attr name corresponding
                #   to the object attr name
                #  ex. noderes.nfsdir
                my ($tab, $tabattr) = split('\.', $this_attr->{tabentry});
    
                foreach my $objname (sort @{$type_obj{$objtype}}) {
                    # get table lookup info from Schema.pm
                    #  !!!! some tables depend on the value of certain attrs
                    #   we need to look up attrs in the correct order or we will
                    #   not be able to determine what tables to look
                    #	in for some attrs.
                    if (exists($this_attr->{only_if}))
                    {
                         my ($check_attr, $check_value) = split('\=', $this_attr->{only_if});
                         # if the object value is not the value we need
                         #   to match then try the next only_if value
                         next if ( !($objhash{$objname}{$check_attr} =~ /\b$check_value\b/) );
                    }
                    
                    
                    $objhash{$objname}{'objtype'} = $objtype;
                    my %tabentry = ();
                    # def commands need to support multiple keys in one table
                    # the subroutine parse_access_tabentry is used for supporting multiple keys
                    my $rc = xCAT::DBobjUtils->parse_access_tabentry($objname, 
                                                                     $this_attr->{access_tabentry}, \%tabentry);
                    if ($rc != 0)
                    {
                         my $rsp;
                         $rsp->{data}->[0] =
                           "access_tabentry \'$this_attr->{access_tabentry}\' is not valid.";
                          xCAT::MsgUtils->message("E", $rsp, $::callback);
                         next;
                    }
                    #
                    # Only allow one table in the access_tabentry
                    # use multiple tables to look up tabentry does not make any sense
                    my $lookup_table = $tabentry{'lookup_table'};
                    my $intabhash = 0;
                    my $notsearched = 0;
                    foreach my $lookup_attr (keys %{$tabentry{'lookup_attrs'}})
                    {
                        # Check whether the attribute is already in %tabhash
                        # The %tabhash is for performance considerations
                        if ( ($lookup_attr eq 'node') && ($objtype eq 'node') ){ 
                            if (defined($tabhash{$lookup_table}{$objname}{$tabattr})) {
                                if ($verbose == 1)
                                {
                                    $objhash{$objname}{$attr} = "$tabhash{$lookup_table}{$objname}{$tabattr}\t(Table:$lookup_table - Key:$lookup_attr - Column:$tabattr)";
                                }
                                else
                                {
                                    $objhash{$objname}{$attr} = $tabhash{$lookup_table}{$objname}{$tabattr};
                                }
                                $intabhash = 1;
                                last;
                            } elsif (! defined($tabhash{$lookup_table}{$objname}{"$tabattr"."_hassearched"})) {
                                $notsearched = 1;
                            } 
                        } else {
                            $notsearched = 1;
                        }
                    }

                    # Not in tabhash,
                    # Need to lookup the table
                    if ($intabhash == 0 && $notsearched == 1)
                    {
                        # look up attr values
                        my @rows = xCAT::DBobjUtils->getDBtable($lookup_table);
                        if (@rows)
                        {
                            foreach my $rowent (@rows)
                            {
                                my $match = 1;
                                my $matchedattr;
                                # Again, multiple keys support needs the "foreach"
                                foreach my $lookup_attr (keys %{$tabentry{'lookup_attrs'}})
                                {
                                    if ($rowent->{$lookup_attr} ne $tabentry{'lookup_attrs'}{$lookup_attr})
                                    {
                                        $match = 0;
                                        last;
                                    }
                                }
                                if ($match == 1)
                                {
                                     if ($verbose == 1)
                                     {
                                         my @lookup_attrs = keys %{$tabentry{'lookup_attrs'}};
                                         $objhash{$objname}{$attr} = "$rowent->{$tabattr}\t(Table:$lookup_table - Key: @lookup_attrs - Column:$tabattr)";
                                     }
                                     else 
                                     {
                                         $objhash{$objname}{$attr} = $rowent->{$tabattr};
                                     }
                                 } #end if ($match...
                            } #end foreach
                        } # end if (defined...
                    } #end if ($intabhash...
                }

            }
        }
        
    } #foreach my $objtype

    return %objhash;
}

#----------------------------------------------------------------------------

=head3   getDBtable

        Get a DB table, cache it , & return list of rows from the table.

        Arguments:
        Returns:
                undef - error
                @rows - of table
        Globals:
        Error:
        Example:

        call as follows
          my @TableRowArray= xCAT::DBobjUtils->getDBtable($tablename); 

        Comments:

=cut

#-----------------------------------------------------------------------------
sub getDBtable
{
    my ($class, $table) = @_;
    my @rows = [];

	# save this table info - in case this subr gets called multiple times
    if (grep(/^$table$/, @::foundTableList))
    {

        # already have this
        @rows = @{$::TableHash{$table}};

    }
    else
    {

    	# need to get info from DB
    	my $thistable = xCAT::Table->new($table, -create => 1, -autocommit => 0);
    	if (!$thistable)
    	{
        	return undef;
    	}

    	#@rows = $thistable->getTable;
	@rows = @{$thistable->getAllEntries()};

    	#   !!!! this routine returns rows even if the table is empty!!!!!!

		#  keep track of the fact that we checked this table
        #   - even if it's empty!
        push(@::foundTableList, $thistable->{tabname});

        @{$::TableHash{$table}} = @rows;

    	#$thistable->commit;

	} # end if not cached

   	if (@rows)
   	{
       	return @rows;
   	}
   	else
   	{
       	return undef;
    }
}

#----------------------------------------------------------------------------

=head3   setobjdefs

        Set the object definitions in the DB.
            - Handles the Schema lookup and updating the DB tables.

        Arguments:
        Returns:
                1 - error
                0 - OK
        Globals:
        Error:
        Example:

        To use:
		 	-create hash for objectname and object type
            	ex. $objhash{$object}{$attribute} = value;

			-then call as follows:
				if (xCAT::DBobjUtils->setobjdefs(\%objhash) != 0)

        Comments:

=cut

#-----------------------------------------------------------------------------
sub setobjdefs
{
    my ($class, $hash_ref) = @_;
    my %objhash = %$hash_ref;
    my %settableref;
    my $ret = 0;
    my %allupdates;
    my $setattrs=0;

    # get the attr=vals for these objects from the DB - if any
    #       - so we can figure out where to put additional attrs
    # The getobjdefs call was in the foreach loop,
    # it caused mkdef/chdef performance issue,
    # so it is moved out of the foreach loop

    my %DBhash;
    my @attrs;
    foreach my $objname (keys %objhash)
    {
        my $type = $objhash{$objname}{objtype};
        $DBhash{$objname} = $type;
        @attrs = keys %{$objhash{$objname}};
    }

    my %DBattrvals;
    %DBattrvals = xCAT::DBobjUtils->getobjdefs(\%DBhash, 0, \@attrs);

    # for each object figure out:
    #	- what tables to update
    #	- which table attrs correspond to which object attrs
    #	- what the keys are for each table
    # update the tables a row at a time
    foreach my $objname (keys %objhash)
    {

        # get attr=val that are set in the DB ??
        my $type = $objhash{$objname}{objtype};

		# handle the monitoring table as a special case !!!!!
        if ($type eq 'monitoring')
        {

            # Get the names of the attrs stored in monitoring table
            # get the object type decription from Schema.pm
            my $datatype = $xCAT::Schema::defspec{$type};
            
            #  get a list of valid attr names
            #  for this type object
            my @attrlist;
            foreach my $entry (@{$datatype->{'attrs'}})
            {
            	   push(@attrlist, $entry->{'attr_name'});
            }

            # open the tables (monitoring and monsetting)
            my $montable = xCAT::Table->new('monitoring', -create => 1, -autocommit => 0);
            if (!$montable)
            {
                my $rsp;
                $rsp->{data}->[0] = "Could not set the \'$montable\' table.";
                xCAT::MsgUtils->message("E", $rsp, $::callback);
                return 1;
            }
            # open the table
            my $monsettable = xCAT::Table->new('monsetting', -create => 1, -autocommit => 0);
            if (!$monsettable)
            {
                my $rsp;
                $rsp->{data}->[0] = "Could not set the \'$monsettable\' table.";
                xCAT::MsgUtils->message("E", $rsp, $::callback);
                return 1;
            }

            my %keyhash; 
            my %updates;
            
            foreach my $attr (keys %{$objhash{$objname}})
            {
                my $val;
                if ($attr eq 'objtype')
                {
                    next;
                }

                # determine the value if we have plus or minus
                if ($::plus_option)
                {
                    # add new to existing - at the end - comma separated
                    if (defined($DBattrvals{$objname}{$attr}))
                    {
                        $val = "$DBattrvals{$objname}{$attr},$objhash{$objname}{$attr}";
                    }
                    else
                    {
                        $val = "$objhash{$objname}{$attr}";
                    }
                }
                elsif ($::minus_option)
                {
                    # remove the specified list of values from the current
                    #   attr values.
                    if ($DBattrvals{$objname}{$attr})
                    {
                        # get the list of attrs to remove
                        my @currentList = split(/,/, $DBattrvals{$objname}{$attr});
                        my @minusList   = split(/,/, $objhash{$objname}{$attr});

                        # make a new list without the one specified
                        my $first = 1;
                        my $newlist;
                        foreach my $i (@currentList)
                        {
                            chomp $i;
                            if (!grep(/^$i$/, @minusList))
                            {
                                # set new groups list for node
                                if (!$first)
                                {
                                    $newlist .= ",";
                                }
                                $newlist .= $i;
                                $first = 0;
                            }
                        }
                        $val = $newlist;
                    }
                }
                else
                {
                    #just set the attr to what was provided! - replace
                    $val = $objhash{$objname}{$attr};
                }

                if (grep(/^$attr$/, @attrlist)) {
                    # if the attr belong in the monitoring tabel
                    %keyhash=(name=>$objname);
                    %updates=($attr=>$val);
                    $montable->setAttribs(\%keyhash, \%updates);
                } else {
                    # else it belongs in the monsetting table
                    $keyhash{name} = $objname;
                    $keyhash{key} = $attr;
                    $updates{value} = $val;
                    $monsettable->setAttribs(\%keyhash, \%updates);
                }
            }
                
            $montable->commit;
            $monsettable->commit;
            next;
        } #if ($type eq 'monitoring')

        # handle the site table as a special case !!!!!
        if ($type eq 'site')
        {
            # open the table
            my $thistable =
            xCAT::Table->new('site', -create => 1, -autocommit => 0);
            if (!$thistable)
            {
                my $rsp;
                $rsp->{data}->[0] = "Could not set the \'$thistable\' table.";
                xCAT::MsgUtils->message("E", $rsp, $::callback);
                return 1;
            }

            foreach my $attr (keys %{$objhash{$objname}})
            {
                if ($attr eq 'objtype')
                {
                    next;
                }

                my %keyhash;
                $keyhash{key} = $attr;

                my $val;
                if ($::plus_option)
                {
                    # add new to existing - at the end - comma separated
                    if (defined($DBattrvals{$objname}{$attr}))
                    {
                        $val =
                          "$DBattrvals{$objname}{$attr},$objhash{$objname}{$attr}";
                    }
                    else
                    {
                        $val = "$objhash{$objname}{$attr}";
                    }
                }
                elsif ($::minus_option)
                {
                    # remove the specified list of values from the current
                    #   attr values.
                    if ($DBattrvals{$objname}{$attr})
                    {
                        # get the list of attrs to remove
                        my @currentList = split(/,/, $DBattrvals{$objname}{$attr});
                        my @minusList   = split(/,/, $objhash{$objname}{$attr});

                        # make a new list without the one specified
                        my $first = 1;
                        my $newlist;
                        foreach my $i (@currentList)
                        {
                            chomp $i;
                            if (!grep(/^$i$/, @minusList))
                            {
                                # set new groups list for node
                                if (!$first)
                                {
                                    $newlist .= ",";
                                }
                                $newlist .= $i;
                                $first = 0;
                            }
                        }
                        $val = $newlist;
                    }
                }
                else
                {

                    #just set the attr to what was provided! - replace
                    $val = $objhash{$objname}{$attr};

                }

                if ( $val eq "") { # delete the line
                    $thistable->delEntries(\%keyhash);
                }  else { # change the attr
                
                my %updates;
                $updates{value} = $val;
                
                my ($rc, $str) = $thistable->setAttribs(\%keyhash, \%updates);
                if (!defined($rc))
                {
                    if ($::verbose)
                    {
                        my $rsp;
                        $rsp->{data}->[0] =
                        	"Could not set the \'$attr\' attribute of the \'$objname\' object in the xCAT database.";
                        $rsp->{data}->[1] =
                        	"Error returned is \'$str->errstr\'.";
                        xCAT::MsgUtils->message("I", $rsp, $::callback);
                    }
                        $ret = 1;
                    }
                }

            }

            $thistable->commit;

            next;
        } #if ($type eq 'site')



        #
        #  handle the rest of the object types
        #

        # get the object type decription from Schema.pm
        my $datatype = $xCAT::Schema::defspec{$type};

		# get the object key to look for, for this object type
        my $objkey = $datatype->{'objkey'};

        #  get a list of valid attr names
        #     for this type object
        my %attrlist;
        foreach my $entry (@{$datatype->{'attrs'}})
        {
            push(@{$attrlist{$type}}, $entry->{'attr_name'});
        }

        my @attrprovided=();

        # check FINALATTRS to see if all the attrs are valid
        foreach my $attr (keys %{$objhash{$objname}})
        {

            if ($attr eq $objkey)
            {
                next;
            }

            if ($attr eq "objtype")
            {
                # objtype not stored in object definition
                next;
            }

            if (!(grep /^$attr$/, @{$attrlist{$type}}))
            {
                if ($::verbose)
                {
                    my $rsp;
                    $rsp->{data}->[0] =
                      "\'$attr\' is not a valid attribute for type \'$type\'.";
                    $rsp->{data}->[1] = "Skipping to the next attribute.";
                    xCAT::MsgUtils->message("I", $rsp, $::callback);
                }
                next;
            }
            push(@attrprovided, $attr); 
        }

        #   we need to figure out what table to
        #      store each attr
        #   And we must do this in the order given in defspec!!

        my @setattrlist=();
        my @checkedattrs;
        my $invalidattr;

        foreach my $this_attr (@{$datatype->{'attrs'}})
        {
            my %keyhash;
            my %updates;
            my %tabentry;
            my ($lookup_table, $lookup_attr, $lookup_data);
            my $attr_name = $this_attr->{attr_name};

            if ($attr_name eq $objkey)
            {
                next;
            }

            # if we have a value for this attribute then process it
            #   - otherwise go to the next attr
            if (defined($objhash{$objname}{$attr_name}))
            {
                # check the defspec to see where this attr goes

                # the table for this attr might depend on the
                #       value of some other attr
                # need to check the only_if entries to find one where the
                #       other attr value matches what we have
                #       ex. like if I want to set hdwctrlpoint I will have
                #               to match the right value for mgtmethod
                if (exists($this_attr->{only_if}))
                {
                    my ($check_attr, $check_value) =
                      split('\=', $this_attr->{only_if});

                    # if my attr value for the attr to check doesn't
                    #   match this then try the next one
                    # ex. say I want to set hdwctrlpoint, the table
                    #   will depend on the mgtmethod attr - so I need
                    #   to find the 'only_if' that matches the value
                    #   specified for that attr (ex. mgtmethod=hmc)

                    # need to check the attrs we are setting for the object
                    #   as well as the attrs for this object that may be
                   	#   already set in DB

                    if ( !($objhash{$objname}{$check_attr})  && !($DBattrvals{$objname}{$check_attr}) ) {
                        # if I didn't already check for this attr
                        my $rsp;
                        if (!grep(/^$attr_name$/, @checkedattrs)) {
                            push @{$rsp->{data}}, "Cannot set the \'$attr_name\' attribute unless a value is provided for \'$check_attr\'.";

                            foreach my $tmp_attr (@{$datatype->{'attrs'}}) {
                                my $attr = $tmp_attr->{attr_name};
                                if ($attr eq $check_attr) {
                                    my ($tab, $at) = split(/\./, $tmp_attr->{tabentry});
                                    my $schema = xCAT::Table->getTableSchema($tab);
                                    my $desc = $schema->{descriptions}->{$at};
                                    push @{$rsp->{data}}, "$check_attr => $desc";
                                }
                            }
                        }
                        xCAT::MsgUtils->message("I", $rsp, $::callback);
                        push(@checkedattrs, $attr_name);
                        if ( $invalidattr->{$attr_name}->{valid} ne 1 ) {
                            $invalidattr->{$attr_name}->{valid} = 0;
                            $invalidattr->{$attr_name}->{condition} = "\'$check_attr=$check_value\'";
                        }

                        next;
                    }

                    if ( !($objhash{$objname}{$check_attr} =~ /\b$check_value\b/) && !($DBattrvals{$objname}{$check_attr}  =~ /\b$check_value\b/) )
                    {
                        if ( $invalidattr->{$attr_name}->{valid} ne 1 ) {
                            $invalidattr->{$attr_name}->{valid} = 0;
                            $invalidattr->{$attr_name}->{condition} = "\'$check_attr=$check_value\'";

                        }

                        next;
                    }
                }
                $invalidattr->{$attr_name}->{valid} = 1;

                #  get the info needed to write to the DB table
                #
                # get the actual attr name to use in the table
                #    - may be different then the attr name used for the object.
                ($::tab, $::tabattr) = split('\.', $this_attr->{tabentry});

                my $rc = xCAT::DBobjUtils->parse_access_tabentry($objname, 
                                                                $this_attr->{access_tabentry}, \%tabentry);
                if ($rc != 0)
                {
                    my $rsp;
                    $rsp->{data}->[0] =
                      "access_tabentry \'$this_attr->{access_tabentry}\' is not valid.";
                     xCAT::MsgUtils->message("E", $rsp, $::callback);
                     next;
                }
                $lookup_table = $tabentry{'lookup_table'};
                # Set the lookup criteria for this attribute into %allupdates
                # the key is 'lookup_attrs'
                foreach my $lookup_attr (keys %{$tabentry{'lookup_attrs'}})
                {
                    $allupdates{$lookup_table}{$objname}{$attr_name}{'lookup_attrs'}{$lookup_attr} 
                                             =$tabentry{'lookup_attrs'}{$lookup_attr};
                }
            }
            else
            {
                next;
            }

            my $val;
            my $delim = ',';
            if(($type eq 'group') && ($DBattrvals{$objname}{'grouptype'} eq 'dynamic')) 
            {
                # dynamic node group selection string use "::" as delimiter
                $delim = '::';
            }
            
            if ($::plus_option)
            {

                # add new to existing - at the end - comma separated
                if (defined($DBattrvals{$objname}{$attr_name}))
                {
                    # add the attr into the list if it's not already in the list!
                    # and avoid the duplicate values
                    my @DBattrarray = split(/$delim/, $DBattrvals{$objname}{$attr_name});
                    my @objhasharray = split(/$delim/, $objhash{$objname}{$attr_name});
                    foreach my $objattr (@objhasharray)
                    {
                        if (!grep(/^\Q$objattr\E$/, @DBattrarray))
                        {
                            push @DBattrarray, $objattr;
                        }
                     }
                     $val = join($delim, @DBattrarray);
                }
                else
                {
                    $val = "$objhash{$objname}{$attr_name}";
                }

            }
            elsif ($::minus_option)
            {

                # remove the specified list of values from the current
                #	attr values.
                if ($DBattrvals{$objname}{$attr_name})
                {

                    # get the list of attrs to remove
                    my @currentList =
                      split(/$delim/, $DBattrvals{$objname}{$attr_name});
                    my @minusList = split(/$delim/, $objhash{$objname}{$attr_name});

                    foreach my $em (@minusList)
                    {
                        if (!(grep {$_ eq $em} @currentList))
                        {
                            if (($::opt_t eq 'group') && ($DBattrvals{$objname}{'grouptype'} ne 'dynamic'))
                            {
                                my $rsp;
			        $rsp->{data}->[0] = "$objname is not a member of \'$em\'.";
			        xCAT::MsgUtils->message("W", $rsp, $::callback);
                             } else {
                                my $rsp;
			        $rsp->{data}->[0] = "$em is not in the atrribute of \'$attr_name\' for the \'$objname\' definition.";
			        xCAT::MsgUtils->message("W", $rsp, $::callback);
                             }
                        }
                    }
                    # make a new list without the one specified
                    my $first = 1;
                    my $newlist;
                    foreach my $i (@currentList)
                    {
                        chomp $i;
                        if (!grep(/^\Q$i\E$/, @minusList))
                        {

                            # set new list for node
                            if (!$first)
                            {
                                $newlist .= "$delim";
                            }
                            $newlist .= $i;
                            $first = 0;
                        }
                    }
                    $val = $newlist;
                }

            }
            else
            {

                #just set the attr to what was provided! - replace
                $val = $objhash{$objname}{$attr_name};

            }

            # Set the values into %allupdates
            # the key is 'tabattrs'
            $allupdates{$lookup_table}{$objname}{$attr_name}{'tabattrs'}{$::tabattr} = $val;
            $setattrs=1;
            
            push(@setattrlist, $attr_name);

        }    # end - foreach attribute

        my $rsp;
        foreach my $att (keys %$invalidattr) {
            if ( $invalidattr->{$att}->{valid} ne 1) {
my $tt = $invalidattr->{$att}->{valid};
                push @{$rsp->{data}}, "Cannot set the attr=\'$att\' attribute unless $invalidattr->{$att}->{condition}.";
                xCAT::MsgUtils->message("E", $rsp, $::callback);
            }
        }


# TODO - need to get back to this
if (0) {
		#
		#  check to see if all the attrs got set
		#

		my @errlist;
		foreach $a (@attrprovided)
        {	
			#  is this attr was not set then add it to the error list
			if (!grep(/^$a$/, @setattrlist))
			{			
				push(@errlist, $a);
				$ret = 2;
			}

		}
		if ($ret == 2) {
			my $rsp;
			$rsp->{data}->[0] = "Could not set the following attributes for the \'$objname\' definition in the xCAT database: \'@errlist\'";
			xCAT::MsgUtils->message("E", $rsp, $::callback);
		}

}

    }    # end - foreach object
#==========================================================#
#%allupdates structure:
# for command: chdef -t node -o node1 groups=all 
#              usercomment=ddee passwd.HMC=HMC 
#              passwd.admin=cluster passwd.general=abc123
# the %allupdates will be:
#0  'ppcdirect'
#1  HASH(0x12783d30)
#   'node1' => HASH(0x12783cc4)
#      'passwd.HMC' => HASH(0x12783ed4)
#         'lookup_attrs' => HASH(0x12783f70)
#            'hcp' => 'node1'
#            'username' => 'HMC'
#         'tabattrs' => HASH(0x12783e8c)
#            'password' => 'HMC'
#      'passwd.admin' => HASH(0x12783c64)
#         'lookup_attrs' => HASH(0x12784000)
#            'hcp' => 'node1'
#            'username' => 'admin'
#         'tabattrs' => HASH(0x12783f64)
#            'password' => 'cluster'
#      'passwd.general' => HASH(0x12783a6c)
#         'lookup_attrs' => HASH(0x12784198)
#            'hcp' => 'node1'
#            'username' => 'general'
#         'tabattrs' => HASH(0x12783aa8)
#            'password' => 'abc123'
#2  'nodelist'
#3  HASH(0x127842b8)
#   'node1' => HASH(0x12784378)
#      'groups' => HASH(0x12784090)
#         'lookup_attrs' => HASH(0x127844bc)
#            'node' => 'node1'
#         'tabattrs' => HASH(0x1277fd34)
#            'groups' => 'all'
#      'usercomment' => HASH(0x12784318)
#         'lookup_attrs' => HASH(0x12780550)
#            'node' => 'node1'
#         'tabattrs' => HASH(0x127842f4)
#            'comments' => 'ddee'
#=================================================================#
	# now set the attribute values in the tables
	#   - handles all except site, monitoring & monsetting for now
	if ($setattrs) {
            foreach my $table (keys %allupdates) {
            
            # get the keys for this table
            my $schema = xCAT::Table->getTableSchema($table);
            my $keys = $schema->{keys};
            
            # open the table
            my $thistable = xCAT::Table->new($table, -create => 1, -autocommit => 0);
            if (!$thistable) {
            	my $rsp;
            	$rsp->{data}->[0] = "Could not set the \'$thistable\' table.";
            	xCAT::MsgUtils->message("E", $rsp, $::callback);
            	return 1;
            }
            
            # Special case for the postscripts table
            # Does not set the postscripts to the postscripts table
            # if the postscripts already in xcatdefaults
            # for code logic, it will be clearer to put the special case into defch,
            # but putting it into defch will introduce additional table access for postscripts table.
            # accessing table is time consuming.
            if ($table eq "postscripts") {
                my $xcatdefaultsps;
                my $xcatdefaultspbs;
                my @TableRowArray = xCAT::DBobjUtils->getDBtable('postscripts');
                if (@TableRowArray)
                {
                    foreach my $tablerow (@TableRowArray)
                    {
                        if(($tablerow->{node} eq 'xcatdefaults') && !($tablerow->{disable}))
                        {
                            $xcatdefaultsps = $tablerow->{postscripts};
                            $xcatdefaultspbs = $tablerow->{postbootscripts};
                            last;
                        }
                    }
                }
                my @xcatdefps = split(/,/, $xcatdefaultsps);
                my @xcatdefpbs = split(/,/, $xcatdefaultspbs);
                foreach my $obj(keys %{$allupdates{$table}}) {
                    if ($obj eq 'xcatdefaults') {
                        #xcatdefaults can be treated as a node?
                        next;
                    }
                    my @newps;
                    if (defined($allupdates{$table}{$obj}{'postscripts'}) 
                                   && defined($allupdates{$table}{$obj}{'postscripts'}{'tabattrs'}{'postscripts'})) {
                        foreach my $tempps (split(/,/, $allupdates{$table}{$obj}{'postscripts'}{'tabattrs'}{'postscripts'})) {
                            if (grep(/^$tempps$/, @xcatdefps)) {
                                 my $rsp;
                                 $rsp->{data}->[0] = "$obj: postscripts \'$tempps\' is already included in the \'xcatdefaults\'.";
                                 xCAT::MsgUtils->message("E", $rsp, $::callback);
                             } else {
                                 push @newps, $tempps;
                             }
                        }
                        $allupdates{$table}{$obj}{'postscripts'}{'tabattrs'}{'postscripts'} = join(',', @newps);
                    }
                    my @newpbs;
                    if (defined($allupdates{$table}{$obj}{'postbootscripts'}) 
                                     && defined($allupdates{$table}{$obj}{'postbootscripts'}{'tabattrs'}{'postbootscripts'})) {
                        foreach my $temppbs (split(/,/, $allupdates{$table}{$obj}{'postbootscripts'}{'tabattrs'}{'postbootscripts'})) {
                            if (grep(/^$temppbs$/, @xcatdefpbs)) {
                                my $rsp;
                                $rsp->{data}->[0] = "$obj: postbootscripts \'$temppbs\' is already included in the \'xcatdefaults\'.";
                                xCAT::MsgUtils->message("E", $rsp, $::callback);
                            } else {
                                push @newpbs, $temppbs;
                            }
                        }
                        $allupdates{$table}{$obj}{'postbootscripts'}{'tabattrs'}{'postbootscripts'} = join(',', @newpbs);
                     }
                }
            }

            my $commit_manually = 0;
            my %node_updates;
            OBJ: foreach my $obj (keys %{$allupdates{$table}}) {
                ROW: foreach my $row (keys %{$allupdates{$table}{$obj}}) {
                    my %keyhash;
                    my %updates;
                    # make sure we have a value for each key
                    foreach my $k (@$keys) {
                        if (!$allupdates{$table}{$obj}{$row}{'lookup_attrs'}) {
                            my $rsp;
                            $rsp->{data}->[0] = "\nMissing required attribute values for the \'$obj\' object. The required attributes are: @$keys";
                            xCAT::MsgUtils->message("E", $rsp, $::callback);
                            $ret = 1;
                            next ROW;
                        }
                    }
                    
                    # lookup keys in %hashkey
                    # ex. $keyhash{'hcp'} = node1
                    foreach my $key (keys %{$allupdates{$table}{$obj}{$row}{'lookup_attrs'}}) {
                        $keyhash{$key} = $allupdates{$table}{$obj}{$row}{'lookup_attrs'}{$key};
                    }
                    
                    # set values in %updates
                    # ex. $updates{'groups'} = 'all,lpar'
                    foreach my $attr (keys %{$allupdates{$table}{$obj}{$row}{'tabattrs'}}) {
                        if (scalar(keys %keyhash) == 0 && $keyhash{'node'} && $keyhash{'node'} eq "node") {
                            $node_updates{$obj}{$attr} = $allupdates{$table}{$obj}{$row}{'tabattrs'}{$attr};
                        } else {
                            $updates{$attr} = $allupdates{$table}{$obj}{$row}{'tabattrs'}{$attr};
                        }
                    }

                    # only uses the setAttribs to set attribute one by one when the obj type is NOT 'node'
                    if (%updates) {
                        $commit_manually = 1;
                        my ($rc, $str) = $thistable->setAttribs(\%keyhash, \%updates);
                    }
                } #end foreach my $row
            } #end foreach my $obj
            if ($commit_manually) {
                $thistable->commit;
            }
            if (%node_updates) {
                $thistable->setNodesAttribs(\%node_updates);
            }
        } #end forach my $table
    }
    return $ret;
}

#----------------------------------------------------------------------------

=head3   rmobjdefs

        Remove object definitions from the DB.

        Arguments:
        Returns:
                0 - OK
                1 - error
        Globals:
        Error:
        Example:

		To use create hash for object name and object type
            ex. $objhash{$obj} = $type;
        - then call as follows:
			xCAT::DBobjUtils->rmobjdefs(\%objhash);

        Comments:

=cut

#-----------------------------------------------------------------------------
sub rmobjdefs
{
    my ($class, $hash_ref) = @_;

    my %tablehash;

    my %typehash = %$hash_ref;

    # get the attr=vals for these objects so we know how to
    #   find what tables have to be modified

    foreach my $objname (sort (keys %typehash))
    {
        my $type = $typehash{$objname};

        # special handling for site table
        if ($type eq 'site')
        {
            my %DBattrvals = xCAT::DBobjUtils->getobjdefs(\%typehash);
            my $thistable =
              xCAT::Table->new('site', -create => 1, -autocommit => 0);
            my %keyhash;
            foreach my $attr (keys %{$DBattrvals{$objname}})
            {

                # ex.  key = attr
                $keyhash{key} = $attr;

                $thistable->delEntries(\%keyhash);

            }
            $thistable->commit();
            next;
        }

        # get the object type decription from Schema.pm
        my $datatype = $xCAT::Schema::defspec{$type};

        # go through the list of valid attrs
        #  - need to delete the row with a $key value of $objname from $table
        #  - make a hash containing $delhash{$table}{$key}= $objname
        foreach my $this_attr (@{$datatype->{'attrs'}})
        {
            my $attr = $this_attr->{attr_name};

            # get table lookup info from Schema.pm
            # def commands need to support multiple keys in one table
            # the subroutine parse_access_tabentry is used for supporting multiple keys
            my %tabentry = ();
            my $rc = xCAT::DBobjUtils->parse_access_tabentry($objname, $this_attr->{access_tabentry}, \%tabentry);
            if ($rc != 0)
            {
                my $rsp;
                $rsp->{data}->[0] =
                  "access_tabentry \'$this_attr->{access_tabentry}\' is not valid.";
                 xCAT::MsgUtils->message("E", $rsp, $::callback);
                 next;
            }

            # Only allow one table in the access_tabentry
            # use multiple tables to look up tabentry does not make any sense
            my $lookup_table = $tabentry{'lookup_table'};
            # The attr_name is the *def attribute name instead of db column
            my $attr_name = $this_attr->{'attr_name'};
            # we'll need table name, object name, attribute name and the lookup entries
            # put this info in a hash - we'll process it later - below
            foreach my $lookup_attr (keys %{$tabentry{'lookup_attrs'}})
            {
                $tablehash{$lookup_table}{$objname}{$attr_name}{$lookup_attr} 
                                    = $tabentry{'lookup_attrs'}{$lookup_attr};
            }

        }
    }
#=============================================#
# The tablehash looks like this
 # DB<5> x %tablehash
 # 'bootparams'
 # HASH(0x1280828c)
 #  'node1' => HASH(0x127bca50)
 #     'addkcmdline' => HASH(0x127fb114)
 #        'node' => 'node1'
 #     'initrd' => HASH(0x127bcb40)
 #        'node' => 'node1'
 #     'kcmdline' => HASH(0x127fb24c)
 #        'node' => 'node1'
 #     'kernel' => HASH(0x127b2e80)
 #        'node' => 'node1'
 #  'testfsp' => HASH(0x1280e71c)
 #     'addkcmdline' => HASH(0x1280e7a0)
 #        'node' => 'testfsp'
 #     'initrd' => HASH(0x1280e740)
 #        'node' => 'testfsp'
 #     'kcmdline' => HASH(0x1280e77c)
 #        'node' => 'testfsp'
 #     'kernel' => HASH(0x1280e758)
 #        'node' => 'testfsp'
 #...
 # 'ppcdirect'
 # HASH(0x1278fe1c)
 #  'node1' => HASH(0x12808370)
 #     'passwd.HMC' => HASH(0x128083e8)
 #        'hcp' => 'node1'
 #        'username' => 'HMC'
 #     'passwd.admin' => HASH(0x128081c0)
 #        'hcp' => 'node1'
 #        'username' => 'admin'
 #     'passwd.general' => HASH(0x128075d8)
 #        'hcp' => 'node1'
 #        'username' => 'general'
 #  'testfsp' => HASH(0x12790620)
 #     'passwd.HMC' => HASH(0x1280ee84)
 #        'hcp' => 'testfsp'
 #        'username' => 'HMC'
 #     'passwd.admin' => HASH(0x128082f8)
 #        'hcp' => 'testfsp'
 #        'username' => 'admin'
 #     'passwd.general' => HASH(0x1280843c)
 #        'hcp' => 'testfsp'
 #        'username' => 'general'
 #...
##=========================================================#
    # now for each table - clear the entry
    foreach my $table (keys %tablehash)
    {
        my @all_keyhash;

        my $thistable =
          xCAT::Table->new($table, -create => 1, -autocommit => 0);

        foreach my $obj (keys %{$tablehash{$table}}) {
            my %keyhash;
            foreach my $attr (keys %{$tablehash{$table}{$obj}})
            {
                foreach my $key (keys %{$tablehash{$table}{$obj}{$attr}})
                {

                    # ex. $keyhash{node}=c68m3hvp01
                    $keyhash{$key} = $tablehash{$table}{$obj}{$attr}{$key};
                }
            }
            push @all_keyhash, \%keyhash;
        }
        # ex. delete the c68m3hvp01 entry of the node column in the
        #       nodelist table
        $thistable->delEntries(\@all_keyhash);

        $thistable->commit();
    }

    return 0;
}

#----------------------------------------------------------------------------

=head3   readFileInput

        Process the command line input piped in from a file.
		 	(Support stanza or xml format.)

        Arguments:
        Returns:
                0 - OK
                1 - error
        Globals:
        Error:
        Example:

        Comments:
			Set @::fileobjtypes, @::fileobjnames, %::FILEATTRS
				(i.e.- $::FILEATTRS{objname}{attr}=val)

=cut

#-----------------------------------------------------------------------------
sub readFileInput
{
    my ($class, $filedata) = @_;
	my ($objectname, $junk1, $junk2);

    @::fileobjnames = ();

    my @lines = split /\n/, $filedata;

    my $header = $lines[0];

    # to do
    #if ($header =~/<xCAT data object stanza file>/) {
    # do stanza file parsing
    # } elsis ($header =~/<xCAT data object XML file>/) {
    # do XML parsing
    #}

    my $look_for_colon = 1;    # start with first line that has a colon
	my $objtype;

    foreach my $l (@lines)
    {

        # skip blank and comment lines
        next if ($l =~ /^\s*$/ || $l =~ /^\s*#/);

        # see if it's a stanza name
        if (grep(/:\s*$/, $l))
        {

            $look_for_colon = 0;    # ok - we have a colon

            ($objectname, $junk2) = split(/:/, $l);

            # if $junk2 is defined or there's an = 
            if ($junk2 || grep(/=/, $objectname))
            {

                # error - invalid header $line in node definition file
                #         skipping to next node stanza
                # Skipping to the next valid header.
                $look_for_colon++;
                next;
            }

            $objectname =~ s/^\s*//;    # Remove any leading whitespace
            $objectname =~ s/\s*$//;    # Remove any trailing whitespace

            #  could have different default stanzas for different object types

            if ($objectname =~ /default/)
            {

                ($junk1, $objtype) = split(/-/, $objectname);

                if ($objtype)
                {
                    $objectname = 'default';
                }

                next;
            }

            push(@::fileobjnames, $objectname);

        }
        elsif (($l =~ /^\s*(\w+)\s*=\s*(.*)\s*/) && (!$look_for_colon))
        {
            my $attr = $1;
            my $val  = $2;
            $attr =~ s/^\s*//;    # Remove any leading whitespace
            $attr =~ s/\s*$//;    # Remove any trailing whitespace
            $val  =~ s/^\s*//;
            $val  =~ s/\s*$//;

            # remove spaces and quotes so createnode won't get upset
            $val =~ s/^\s*"\s*//;
            $val =~ s/\s*"\s*$//;

            if ($objectname eq "default")
            {

                # set the default for this attribute
                $::defAttrs{$objtype}{$attr} = $val;

            }
            else
            {

                # set the value in the hash for this object
                $::FILEATTRS{$objectname}{$attr} = $val;

                # if the attr being set is "objtype" then check
                # 	to see if we have any defaults set for this type
                # the objtype should be the first etntry in each stanza
                #	so after we set the defaults they will be overwritten
                #	by any values that appear in the rest of the stanza
                if ($attr eq 'objtype')
                {
                    push(@::fileobjtypes, $val);

                    #  $val will be the object type ex. site, node etc.
                    foreach my $a (keys %{$::defAttrs{$val}})
                    {

                        # set the default values for this object hash
                        $::FILEATTRS{$objectname}{$a} = $::defAttrs{$val}{$a};
                    }
                }
            }

        }
        else
        {

            # error - invalid line in node definition file
            $look_for_colon++;
        }

    }    # end while - go to next line

    return 0;

}

#----------------------------------------------------------------------------

=head3   getGroupMembers

        Get the list of members for the specified group.

        Arguments:
        Returns:
            undef - error
            $members - comma-separated list of group members
        Globals:
        Error:
        Example:
			To use:
            - create hash for objectname and and attr values  (need group 
				name (object), and grouptype  & members attr values at a
				minimum.)
			
                ex. $objhash{$obj}{$attr} = value;

            - then call as follows:
                xCAT::DBobjUtils->getGroupMembers($objectname, \%objhash);

        Comments:

=cut

#-----------------------------------------------------------------------------
sub getGroupMembers
{
    my ($class, $objectname, $hash_ref) = @_;

    my $members;

    my %objhash = %$hash_ref;

    # set 'static' as the dafault of nodetype
    if (!defined($objhash{$objectname}{'grouptype'}) ||
          $objhash{$objectname}{'grouptype'} eq "") {
        $objhash{$objectname}{'grouptype'} = 'static';
    }

    if ($objhash{$objectname}{'grouptype'} eq 'static')
    {

        my $table = "nodelist";

        my @TableRowArray = xCAT::DBobjUtils->getDBtable($table);

        my $first = 1;
        foreach (@TableRowArray)
        {

            # if find the group name in the "groups" attr value then add the
            #	 node name to the member list
            #if ($_->{'groups'} =~ /$objectname/)

            my @nodeGroupList = split(',', $_->{'groups'});
            if (grep(/^$objectname$/, @nodeGroupList))

            {
                chomp($_->{'node'});
                if (!$first)
                {
                    $members .= ",";
                }
                $members .= $_->{'node'};
                $first = 0;
            }
        }

    }
    elsif ($objhash{$objectname}{'grouptype'} eq 'dynamic')
    {

        # find all nodes that satisfy the criteria specified in "wherevals"
        #	value
        my %whereHash;
        my %tabhash;

        # remove spaces and quotes so createnode won't get upset
        #$val =~ s/^\s*"\s*//;
        #$val =~ s/\s*"\s*$//;

        my @tmpWhereList = split('::', $objhash{$objectname}{'wherevals'});
        my $rc = xCAT::Utils->parse_selection_string(\@tmpWhereList, \%whereHash);
        if ($rc != 0)
        {
            my $rsp;
            $rsp->{data}->[0] =
              "The \'-w\' option has an incorrect attr*val pair.";
            xCAT::MsgUtils->message("E", $rsp, $::callback);
        }

        # see what nodes have these attr=values
        # get a list of all nodes
        my @tmplist = xCAT::DBobjUtils->getObjectsOfType('node');

        # create a hash of obj names and types
		my %tmphash;
        foreach my $n (@tmplist)
        {
            $tmphash{$n} = 'node';
        }

        # Only get the specific attributes of the node
        my @whereattrs = keys %whereHash;
        my %nodeattrhash = xCAT::DBobjUtils->getobjdefs(\%tmphash, 0, \@whereattrs);

        # The attribute 'node' can be used as a key of selection string,
        # however, the 'node' attribute is not included in the getobjdefs hash
        foreach my $objname (keys %nodeattrhash)
        {
            $nodeattrhash{$objname}{'node'} = $objname;
        }
        my $first = 1;
        foreach my $objname (keys %nodeattrhash)
        {
            if (xCAT::Utils->selection_string_match(\%nodeattrhash, $objname, \%whereHash))
            {
                chomp($objname);
                if (!$first)
                {
                    $members .= ",";
                }
                $members .= $objname;
                $first = 0;
            }
        }

    }
    return $members;
}

#----------------------------------------------------------------------------

=head3   getNetwkInfo

        Get the network info from the database for a list of nodes.

        Arguments:
        Returns:
                undef
                hash ref - ex. $nethash{nodename}{networks attr name} = value
        Globals:
        Error:
        Example:

                %nethash = xCAT::DBobjUtils->getNetwkInfo(\@targetnodes);

		Comments:

=cut

#-----------------------------------------------------------------------------
sub getNetwkInfo
{
	my ($class, $ref_nodes) = @_;
	my @nodelist    = @$ref_nodes;

	my %nethash;
	my @attrnames;

	# get the current list of network attrs (networks table columns)
    my $datatype = $xCAT::Schema::defspec{'network'};
	foreach my $a (@{$datatype->{'attrs'}}) {
		my $attr = $a->{attr_name};
		push(@attrnames, $attr);
	}

	# read the networks table
	my @TableRowArray = xCAT::DBobjUtils->getDBtable('networks');
	if (! @TableRowArray)
    {
		return undef;
	}

	# for each node - get the network info
	foreach my $node (@nodelist)
    {

		# get, check, split the node IP
		my $IP = xCAT::NetworkUtils->getipaddr($node);
		chomp $IP;
		unless (($IP =~ /\d+\.\d+\.\d+\.\d+/) || ($IP =~ /:/))
		{
    		next;
		}
		my ($ia, $ib, $ic, $id) = split('\.', $IP);

		# check the entries of the networks table
		# - if the bitwise AND of the IP and the netmask gives you 
		#	the "net" name then that is the entry you want.
		foreach (@TableRowArray) {
			my $NM = $_->{'mask'};
			my $net=$_->{'net'};
			chomp $NM;
			chomp $net;

                        if(xCAT::NetworkUtils->ishostinsubnet($IP, $NM, $net))
                        {
				# fill in the hash - 
				foreach my $attr (@attrnames) {
					if ( defined($_->{$attr}) ) {
						$nethash{$node}{$attr} = $_->{$attr};
					}
                                }
                                next;
                        }
                            
		}

	} #end - for each node

	return %nethash;
}
#----------------------------------------------------------------------------

=head3   parse_access_tabentry

        Parse the access_tabentry field in Schema.pm.
        We needs to support multiple keys in the table
        Arguments:
                $objname: objectname=>objtype hash
                $access_tabentry: the access_tabentry defined in Schema.pm
                $tabentry_ref: return the parsed result through this hash ref 
                                  The structure of the hash is:
                                  {
                                      'lookup_tables' => <table_name>
                                      'lookup_attrs =>
                                      {
                                          'attr1' => 'val1'
                                          'attr2' => 'val2'
                                          ...
                                       }
                                  }
        Returns:
                0 - success
                1 - failed
        Globals:
        Error:
        Example:

		To parse the access_tabentry field

                my $rc = xCAT::DBobjUtils->parse_access_tabentry($objname, $this_attr->{access_tabentry}, \%tabentry);

        Comments:

=cut

#-----------------------------------------------------------------------------
sub parse_access_tabentry()
{
    my ($class, $objname, $access_tabentry, $tabentry_ref) = @_;

    # ex. 'nodelist.node', 'attr:node'
    foreach my $ent (split('::', $access_tabentry))
    {
        # ex. 'nodelist.node', 'attr:node'
        my ($lookup_key, $lookup_value) = split('\=', $ent);

        # ex. 'nodelist', 'node'
        my ($lookup_table, $lookup_attr) = split('\.', $lookup_key);

        # ex. 'attr', 'node'
        my ($lookup_type, $lookup_data) = split('\:', $lookup_value);

        if (!defined($tabentry_ref->{'lookup_table'}))
        {
            $tabentry_ref->{'lookup_table'} = $lookup_table;
        }

        # Only support one lookup table in the access_tabentry
        # Do we need to support multiple tables in one access_tabentry ????
        # has not seen any requirement...
        if ($lookup_table ne $tabentry_ref->{'lookup_table'})
        {
            my $rsp;
            $rsp->{data}->[0] =
                  "The access_tabentry \"$access_tabentry\" is not valid, can not specify more than one tables to look up.";
            xCAT::MsgUtils->message("E", $rsp, $::callback);
            return 1;
        }

       if ($lookup_type eq 'attr')
       {
           # TODO: may need to update in the future
           # for now, the "val" in attr:val in 
           # Schema.pm can only be the object name
           # In the future, even if we need to change here,
           # be caution about the performance
           # looking up table is time consuming
           $tabentry_ref->{'lookup_attrs'}->{$lookup_attr} = $objname;
       }
       elsif ($lookup_type eq 'str')
       {
           $tabentry_ref->{'lookup_attrs'}->{$lookup_attr} = $lookup_data;
       } 
       else
       {
           my $rsp;
           $rsp->{data}->[0] =
                 "The access_tabentry \"$access_tabentry\" is not valid, the lookup type can only be 'attr' or 'str'.";
           xCAT::MsgUtils->message("E", $rsp, $::callback);
           return 1;
       }
    }
    return 0;
}
1;