###################################################################### # # EPrints::MetaField::Subobject; # ###################################################################### # # This file is part of GNU EPrints 2. # # Copyright (c) 2000-2004 University of Southampton, UK. SO17 1BJ. # # EPrints 2 is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # EPrints 2 is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with EPrints 2; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # ###################################################################### =pod =head1 NAME B<EPrints::MetaField::Subobject> - Sub Object an object. =head1 DESCRIPTION This is an abstract field which represents an item, or list of items, in another dataset, but which are a sub part of the object to which this field belongs, and have no indepentent status. For example: Documents are part of EPrints. =over 4 =cut package EPrints::MetaField::Subobject; use strict; use warnings; BEGIN { our( @ISA ); @ISA = qw( EPrints::MetaField ); } use EPrints::MetaField; sub get_sql_type { my( $self, $notnull ) = @_; return undef; } # This type of field is virtual. sub is_virtual { my( $self ) = @_; return 1; } ###################################################################### sub get_property_defaults { my( $self ) = @_; my %defaults = $self->SUPER::get_property_defaults; $defaults{datasetid} = $EPrints::MetaField::REQUIRED; $defaults{show_in_fieldlist} = 0; return %defaults; } ###################################################################### 1;