jpa/plugins/org.eclipse.jpt.jpa.core/src/org/eclipse/jpt/jpa/core/internal/context/orm/GenericOrmVirtualJoinTable.java - dali/webtools.dali - Git at Google

 /*******************************************************************************
  * Copyright (c) 2010, 2011 Oracle. All rights reserved.
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v1.0, which accompanies this distribution
  * and is available at http://www.eclipse.org/legal/epl-v10.html.
  *
  * Contributors:
  *     Oracle - initial API and implementation
  ******************************************************************************/
 package org.eclipse.jpt.jpa.core.internal.context.orm;

 import java.util.ListIterator;
 import java.util.Vector;
 import org.eclipse.jpt.common.utility.internal.CollectionTools;
 import org.eclipse.jpt.common.utility.internal.iterables.EmptyListIterable;
 import org.eclipse.jpt.common.utility.internal.iterables.ListIterable;
 import org.eclipse.jpt.common.utility.internal.iterables.LiveCloneListIterable;
 import org.eclipse.jpt.common.utility.internal.iterables.SingleElementListIterable;
 import org.eclipse.jpt.jpa.core.context.Entity;
 import org.eclipse.jpt.jpa.core.context.JoinColumn;
 import org.eclipse.jpt.jpa.core.context.JoinTable;
 import org.eclipse.jpt.jpa.core.context.PersistentAttribute;
 import org.eclipse.jpt.jpa.core.context.ReadOnlyBaseJoinColumn;
 import org.eclipse.jpt.jpa.core.context.ReadOnlyJoinColumn;
 import org.eclipse.jpt.jpa.core.context.RelationshipMapping;
 import org.eclipse.jpt.jpa.core.context.TypeMapping;
 import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualJoinColumn;
 import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualJoinTable;
 import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualJoinTableRelationshipStrategy;
 import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualRelationship;
 import org.eclipse.jpt.jpa.core.internal.context.ContextContainerTools;
 import org.eclipse.jpt.jpa.core.internal.context.MappingTools;

 /**
  * <code>orm.xml</code> virtual join table
  */
 public class GenericOrmVirtualJoinTable
 	extends AbstractOrmVirtualReferenceTable<JoinTable>
 	implements OrmVirtualJoinTable
 {
 	protected final JoinTable overriddenTable;

 	protected final Vector<OrmVirtualJoinColumn> specifiedInverseJoinColumns = new Vector<OrmVirtualJoinColumn>();
 	protected final SpecifiedInverseJoinColumnContainerAdapter specifiedInverseJoinColumnContainerAdapter = new SpecifiedInverseJoinColumnContainerAdapter();
 	protected final ReadOnlyJoinColumn.Owner inverseJoinColumnOwner;

 	protected OrmVirtualJoinColumn defaultInverseJoinColumn;


 	public GenericOrmVirtualJoinTable(OrmVirtualJoinTableRelationshipStrategy parent, JoinTable overriddenTable) {
 		super(parent);
 		this.overriddenTable = overriddenTable;
 		this.inverseJoinColumnOwner = this.buildInverseJoinColumnOwner();
 	}


 	// ********** synchronize/update **********

 	@Override
 	public void update() {
 		super.update();
 		this.updateSpecifiedInverseJoinColumns();
 		this.updateDefaultInverseJoinColumn();
 	}


 	// ********** table **********

 	@Override
 	public JoinTable getOverriddenTable() {
 		return this.overriddenTable;
 	}


 	// ********** inverse join columns **********

 	public ListIterator<OrmVirtualJoinColumn> inverseJoinColumns() {
 		return this.getInverseJoinColumns().iterator();
 	}

 	protected ListIterable<OrmVirtualJoinColumn> getInverseJoinColumns() {
 		return this.hasSpecifiedInverseJoinColumns() ? this.getSpecifiedInverseJoinColumns() : this.getDefaultInverseJoinColumns();
 	}

 	public int inverseJoinColumnsSize() {
 		return this.hasSpecifiedInverseJoinColumns() ? this.specifiedInverseJoinColumnsSize() : this.getDefaultInverseJoinColumnsSize();
 	}


 	// ********** specified inverse join columns **********

 	public ListIterator<OrmVirtualJoinColumn> specifiedInverseJoinColumns() {
 		return this.getSpecifiedInverseJoinColumns().iterator();
 	}

 	protected ListIterable<OrmVirtualJoinColumn> getSpecifiedInverseJoinColumns() {
 		return new LiveCloneListIterable<OrmVirtualJoinColumn>(this.specifiedInverseJoinColumns);
 	}

 	public int specifiedInverseJoinColumnsSize() {
 		return this.specifiedInverseJoinColumns.size();
 	}

 	public boolean hasSpecifiedInverseJoinColumns() {
 		return this.specifiedInverseJoinColumns.size() != 0;
 	}

 	public OrmVirtualJoinColumn getSpecifiedInverseJoinColumn(int index) {
 		return this.specifiedInverseJoinColumns.get(index);
 	}

 	protected void updateSpecifiedInverseJoinColumns() {
 		ContextContainerTools.update(this.specifiedInverseJoinColumnContainerAdapter);
 	}

 	protected Iterable<JoinColumn> getOverriddenInverseJoinColumns() {
 		return CollectionTools.iterable(this.getOverriddenTable().specifiedInverseJoinColumns());
 	}

 	protected void moveSpecifiedInverseJoinColumn(int index, OrmVirtualJoinColumn joinColumn) {
 		this.moveItemInList(index, joinColumn, this.specifiedInverseJoinColumns, SPECIFIED_INVERSE_JOIN_COLUMNS_LIST);
 	}

 	protected OrmVirtualJoinColumn addSpecifiedInverseJoinColumn(int index, JoinColumn joinColumn) {
 		OrmVirtualJoinColumn virtualJoinColumn = this.buildInverseJoinColumn(joinColumn);
 		this.addItemToList(index, virtualJoinColumn, this.specifiedInverseJoinColumns, SPECIFIED_INVERSE_JOIN_COLUMNS_LIST);
 		return virtualJoinColumn;
 	}

 	protected void removeSpecifiedInverseJoinColumn(OrmVirtualJoinColumn joinColumn) {
 		this.removeItemFromList(joinColumn, this.specifiedInverseJoinColumns, SPECIFIED_INVERSE_JOIN_COLUMNS_LIST);
 	}

 	/**
 	 * specified inverse join column container adapter
 	 */
 	protected class SpecifiedInverseJoinColumnContainerAdapter
 		implements ContextContainerTools.Adapter<OrmVirtualJoinColumn, JoinColumn>
 	{
 		public Iterable<OrmVirtualJoinColumn> getContextElements() {
 			return GenericOrmVirtualJoinTable.this.getSpecifiedInverseJoinColumns();
 		}
 		public Iterable<JoinColumn> getResourceElements() {
 			return GenericOrmVirtualJoinTable.this.getOverriddenInverseJoinColumns();
 		}
 		public JoinColumn getResourceElement(OrmVirtualJoinColumn contextElement) {
 			return contextElement.getOverriddenColumn();
 		}
 		public void moveContextElement(int index, OrmVirtualJoinColumn element) {
 			GenericOrmVirtualJoinTable.this.moveSpecifiedInverseJoinColumn(index, element);
 		}
 		public void addContextElement(int index, JoinColumn element) {
 			GenericOrmVirtualJoinTable.this.addSpecifiedInverseJoinColumn(index, element);
 		}
 		public void removeContextElement(OrmVirtualJoinColumn element) {
 			GenericOrmVirtualJoinTable.this.removeSpecifiedInverseJoinColumn(element);
 		}
 	}


 	// ********** default inverse join column **********

 	public OrmVirtualJoinColumn getDefaultInverseJoinColumn() {
 		return this.defaultInverseJoinColumn;
 	}

 	protected void setDefaultInverseJoinColumn(OrmVirtualJoinColumn joinColumn) {
 		OrmVirtualJoinColumn old = this.defaultInverseJoinColumn;
 		this.defaultInverseJoinColumn = joinColumn;
 		this.firePropertyChanged(DEFAULT_INVERSE_JOIN_COLUMN, old, joinColumn);
 	}

 	protected ListIterable<OrmVirtualJoinColumn> getDefaultInverseJoinColumns() {
 		return (this.defaultInverseJoinColumn != null) ?
 				new SingleElementListIterable<OrmVirtualJoinColumn>(this.defaultInverseJoinColumn) :
 				EmptyListIterable.<OrmVirtualJoinColumn>instance();
 	}

 	protected int getDefaultInverseJoinColumnsSize() {
 		return (this.defaultInverseJoinColumn == null) ? 0 : 1;
 	}

 	protected void updateDefaultInverseJoinColumn() {
 		if (this.buildsDefaultInverseJoinColumn()) {
 			if (this.defaultInverseJoinColumn == null) {
 				this.setDefaultInverseJoinColumn(this.buildInverseJoinColumn(this.getOverriddenTable().getDefaultInverseJoinColumn()));
 			} else {
 				this.defaultInverseJoinColumn.update();
 			}
 		} else {
 			this.setDefaultInverseJoinColumn(null);
 		}
 	}

 	protected boolean buildsDefaultInverseJoinColumn() {
 		return ! this.hasSpecifiedInverseJoinColumns();
 	}


 	// ********** misc **********

 	@Override
 	public OrmVirtualJoinTableRelationshipStrategy getParent() {
 		return (OrmVirtualJoinTableRelationshipStrategy) super.getParent();
 	}

 	protected OrmVirtualJoinTableRelationshipStrategy getJoinStrategy() {
 		return this.getParent();
 	}

 	@Override
 	protected ReadOnlyJoinColumn.Owner buildJoinColumnOwner() {
 		return new JoinColumnOwner();
 	}

 	protected ReadOnlyJoinColumn.Owner buildInverseJoinColumnOwner() {
 		return new InverseJoinColumnOwner();
 	}

 	protected OrmVirtualJoinColumn buildInverseJoinColumn(JoinColumn joinColumn) {
 		return this.buildJoinColumn(this.inverseJoinColumnOwner, joinColumn);
 	}

 	@Override
 	protected String buildDefaultName() {
 		return this.getJoinStrategy().getJoinTableDefaultName();
 	}

 	public RelationshipMapping getRelationshipMapping() {
 		return this.getJoinStrategy().getRelationship().getMapping();
 	}

 	public PersistentAttribute getPersistentAttribute() {
 		return this.getRelationshipMapping().getPersistentAttribute();
 	}


 	// ********** join column owners **********

 	/**
 	 * just a little common behavior
 	 */
 	protected abstract class AbstractJoinColumnOwner
 		implements ReadOnlyJoinColumn.Owner
 	{
 		protected AbstractJoinColumnOwner() {
 			super();
 		}

 		public TypeMapping getTypeMapping() {
 			return this.getRelationship().getTypeMapping();
 		}

 		/**
 		 * by default, the join column is, obviously, in the join table;
 		 * not sure whether it can be anywhere else...
 		 */
 		public String getDefaultTableName() {
 			return GenericOrmVirtualJoinTable.this.getName();
 		}

 		/**
 		 * @see MappingTools#buildJoinColumnDefaultName(org.eclipse.jpt.jpa.core.context.ReadOnlyJoinColumn, org.eclipse.jpt.jpa.core.context.ReadOnlyJoinColumn.Owner)
 		 */
 		public String getDefaultColumnName() {
 			throw new UnsupportedOperationException();
 		}

 		protected OrmVirtualRelationship getRelationship() {
 			return GenericOrmVirtualJoinTable.this.getJoinStrategy().getRelationship();
 		}
 	}


 	/**
 	 * owner for "back-pointer" join columns;
 	 * these point at the source/owning entity
 	 */
 	protected class JoinColumnOwner
 		extends AbstractJoinColumnOwner
 	{
 		protected JoinColumnOwner() {
 			super();
 		}

 		public Entity getRelationshipTarget() {
 			return this.getRelationship().getEntity();
 		}

 		public String getAttributeName() {
 			return MappingTools.getTargetAttributeName(GenericOrmVirtualJoinTable.this.getRelationshipMapping());
 		}

 		public boolean joinColumnIsDefault(ReadOnlyBaseJoinColumn joinColumn) {
 			return GenericOrmVirtualJoinTable.this.defaultJoinColumn == joinColumn;
 		}

 		public int joinColumnsSize() {
 			return GenericOrmVirtualJoinTable.this.joinColumnsSize();
 		}
 	}


 	/**
 	 * owner for "forward-pointer" join columns;
 	 * these point at the target/inverse entity
 	 */
 	protected class InverseJoinColumnOwner
 		extends AbstractJoinColumnOwner
 	{
 		protected InverseJoinColumnOwner() {
 			super();
 		}

 		public Entity getRelationshipTarget() {
 			RelationshipMapping relationshipMapping = GenericOrmVirtualJoinTable.this.getRelationshipMapping();
 			return (relationshipMapping == null) ? null : relationshipMapping.getResolvedTargetEntity();
 		}

 		public String getAttributeName() {
 			RelationshipMapping relationshipMapping = GenericOrmVirtualJoinTable.this.getRelationshipMapping();
 			return (relationshipMapping == null) ? null : relationshipMapping.getName();
 		}

 		public boolean joinColumnIsDefault(ReadOnlyBaseJoinColumn joinColumn) {
 			return GenericOrmVirtualJoinTable.this.defaultInverseJoinColumn == joinColumn;
 		}

 		public int joinColumnsSize() {
 			return GenericOrmVirtualJoinTable.this.inverseJoinColumnsSize();
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2010, 2011 Oracle. All rights reserved.
	* This program and the accompanying materials are made available under the
	* terms of the Eclipse Public License v1.0, which accompanies this distribution
	* and is available at http://www.eclipse.org/legal/epl-v10.html.
	*
	* Contributors:
	* Oracle - initial API and implementation
	******************************************************************************/
	package org.eclipse.jpt.jpa.core.internal.context.orm;

	import java.util.ListIterator;
	import java.util.Vector;
	import org.eclipse.jpt.common.utility.internal.CollectionTools;
	import org.eclipse.jpt.common.utility.internal.iterables.EmptyListIterable;
	import org.eclipse.jpt.common.utility.internal.iterables.ListIterable;
	import org.eclipse.jpt.common.utility.internal.iterables.LiveCloneListIterable;
	import org.eclipse.jpt.common.utility.internal.iterables.SingleElementListIterable;
	import org.eclipse.jpt.jpa.core.context.Entity;
	import org.eclipse.jpt.jpa.core.context.JoinColumn;
	import org.eclipse.jpt.jpa.core.context.JoinTable;
	import org.eclipse.jpt.jpa.core.context.PersistentAttribute;
	import org.eclipse.jpt.jpa.core.context.ReadOnlyBaseJoinColumn;
	import org.eclipse.jpt.jpa.core.context.ReadOnlyJoinColumn;
	import org.eclipse.jpt.jpa.core.context.RelationshipMapping;
	import org.eclipse.jpt.jpa.core.context.TypeMapping;
	import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualJoinColumn;
	import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualJoinTable;
	import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualJoinTableRelationshipStrategy;
	import org.eclipse.jpt.jpa.core.context.orm.OrmVirtualRelationship;
	import org.eclipse.jpt.jpa.core.internal.context.ContextContainerTools;
	import org.eclipse.jpt.jpa.core.internal.context.MappingTools;

	/**
	* <code>orm.xml</code> virtual join table
	*/
	public class GenericOrmVirtualJoinTable
	extends AbstractOrmVirtualReferenceTable<JoinTable>
	implements OrmVirtualJoinTable
	{
	protected final JoinTable overriddenTable;

	protected final Vector<OrmVirtualJoinColumn> specifiedInverseJoinColumns = new Vector<OrmVirtualJoinColumn>();
	protected final SpecifiedInverseJoinColumnContainerAdapter specifiedInverseJoinColumnContainerAdapter = new SpecifiedInverseJoinColumnContainerAdapter();
	protected final ReadOnlyJoinColumn.Owner inverseJoinColumnOwner;

	protected OrmVirtualJoinColumn defaultInverseJoinColumn;


	public GenericOrmVirtualJoinTable(OrmVirtualJoinTableRelationshipStrategy parent, JoinTable overriddenTable) {
	super(parent);
	this.overriddenTable = overriddenTable;
	this.inverseJoinColumnOwner = this.buildInverseJoinColumnOwner();
	}


	// ******** synchronize/update ********

	@Override
	public void update() {
	super.update();
	this.updateSpecifiedInverseJoinColumns();
	this.updateDefaultInverseJoinColumn();
	}


	// ******** table ********

	@Override
	public JoinTable getOverriddenTable() {
	return this.overriddenTable;
	}


	// ******** inverse join columns ********

	public ListIterator<OrmVirtualJoinColumn> inverseJoinColumns() {
	return this.getInverseJoinColumns().iterator();
	}

	protected ListIterable<OrmVirtualJoinColumn> getInverseJoinColumns() {
	return this.hasSpecifiedInverseJoinColumns() ? this.getSpecifiedInverseJoinColumns() : this.getDefaultInverseJoinColumns();
	}

	public int inverseJoinColumnsSize() {
	return this.hasSpecifiedInverseJoinColumns() ? this.specifiedInverseJoinColumnsSize() : this.getDefaultInverseJoinColumnsSize();
	}


	// ******** specified inverse join columns ********

	public ListIterator<OrmVirtualJoinColumn> specifiedInverseJoinColumns() {
	return this.getSpecifiedInverseJoinColumns().iterator();
	}

	protected ListIterable<OrmVirtualJoinColumn> getSpecifiedInverseJoinColumns() {
	return new LiveCloneListIterable<OrmVirtualJoinColumn>(this.specifiedInverseJoinColumns);
	}

	public int specifiedInverseJoinColumnsSize() {
	return this.specifiedInverseJoinColumns.size();
	}

	public boolean hasSpecifiedInverseJoinColumns() {
	return this.specifiedInverseJoinColumns.size() != 0;
	}

	public OrmVirtualJoinColumn getSpecifiedInverseJoinColumn(int index) {
	return this.specifiedInverseJoinColumns.get(index);
	}

	protected void updateSpecifiedInverseJoinColumns() {
	ContextContainerTools.update(this.specifiedInverseJoinColumnContainerAdapter);
	}

	protected Iterable<JoinColumn> getOverriddenInverseJoinColumns() {
	return CollectionTools.iterable(this.getOverriddenTable().specifiedInverseJoinColumns());
	}

	protected void moveSpecifiedInverseJoinColumn(int index, OrmVirtualJoinColumn joinColumn) {
	this.moveItemInList(index, joinColumn, this.specifiedInverseJoinColumns, SPECIFIED_INVERSE_JOIN_COLUMNS_LIST);
	}

	protected OrmVirtualJoinColumn addSpecifiedInverseJoinColumn(int index, JoinColumn joinColumn) {
	OrmVirtualJoinColumn virtualJoinColumn = this.buildInverseJoinColumn(joinColumn);
	this.addItemToList(index, virtualJoinColumn, this.specifiedInverseJoinColumns, SPECIFIED_INVERSE_JOIN_COLUMNS_LIST);
	return virtualJoinColumn;
	}

	protected void removeSpecifiedInverseJoinColumn(OrmVirtualJoinColumn joinColumn) {
	this.removeItemFromList(joinColumn, this.specifiedInverseJoinColumns, SPECIFIED_INVERSE_JOIN_COLUMNS_LIST);
	}

	/**
	* specified inverse join column container adapter
	*/
	protected class SpecifiedInverseJoinColumnContainerAdapter
	implements ContextContainerTools.Adapter<OrmVirtualJoinColumn, JoinColumn>
	{
	public Iterable<OrmVirtualJoinColumn> getContextElements() {
	return GenericOrmVirtualJoinTable.this.getSpecifiedInverseJoinColumns();
	}
	public Iterable<JoinColumn> getResourceElements() {
	return GenericOrmVirtualJoinTable.this.getOverriddenInverseJoinColumns();
	}
	public JoinColumn getResourceElement(OrmVirtualJoinColumn contextElement) {
	return contextElement.getOverriddenColumn();
	}
	public void moveContextElement(int index, OrmVirtualJoinColumn element) {
	GenericOrmVirtualJoinTable.this.moveSpecifiedInverseJoinColumn(index, element);
	}
	public void addContextElement(int index, JoinColumn element) {
	GenericOrmVirtualJoinTable.this.addSpecifiedInverseJoinColumn(index, element);
	}
	public void removeContextElement(OrmVirtualJoinColumn element) {
	GenericOrmVirtualJoinTable.this.removeSpecifiedInverseJoinColumn(element);
	}
	}


	// ******** default inverse join column ********

	public OrmVirtualJoinColumn getDefaultInverseJoinColumn() {
	return this.defaultInverseJoinColumn;
	}

	protected void setDefaultInverseJoinColumn(OrmVirtualJoinColumn joinColumn) {
	OrmVirtualJoinColumn old = this.defaultInverseJoinColumn;
	this.defaultInverseJoinColumn = joinColumn;
	this.firePropertyChanged(DEFAULT_INVERSE_JOIN_COLUMN, old, joinColumn);
	}

	protected ListIterable<OrmVirtualJoinColumn> getDefaultInverseJoinColumns() {
	return (this.defaultInverseJoinColumn != null) ?
	new SingleElementListIterable<OrmVirtualJoinColumn>(this.defaultInverseJoinColumn) :
	EmptyListIterable.<OrmVirtualJoinColumn>instance();
	}

	protected int getDefaultInverseJoinColumnsSize() {
	return (this.defaultInverseJoinColumn == null) ? 0 : 1;
	}

	protected void updateDefaultInverseJoinColumn() {
	if (this.buildsDefaultInverseJoinColumn()) {
	if (this.defaultInverseJoinColumn == null) {
	this.setDefaultInverseJoinColumn(this.buildInverseJoinColumn(this.getOverriddenTable().getDefaultInverseJoinColumn()));
	} else {
	this.defaultInverseJoinColumn.update();
	}
	} else {
	this.setDefaultInverseJoinColumn(null);
	}
	}

	protected boolean buildsDefaultInverseJoinColumn() {
	return ! this.hasSpecifiedInverseJoinColumns();
	}


	// ******** misc ********

	@Override
	public OrmVirtualJoinTableRelationshipStrategy getParent() {
	return (OrmVirtualJoinTableRelationshipStrategy) super.getParent();
	}

	protected OrmVirtualJoinTableRelationshipStrategy getJoinStrategy() {
	return this.getParent();
	}

	@Override
	protected ReadOnlyJoinColumn.Owner buildJoinColumnOwner() {
	return new JoinColumnOwner();
	}

	protected ReadOnlyJoinColumn.Owner buildInverseJoinColumnOwner() {
	return new InverseJoinColumnOwner();
	}

	protected OrmVirtualJoinColumn buildInverseJoinColumn(JoinColumn joinColumn) {
	return this.buildJoinColumn(this.inverseJoinColumnOwner, joinColumn);
	}

	@Override
	protected String buildDefaultName() {
	return this.getJoinStrategy().getJoinTableDefaultName();
	}

	public RelationshipMapping getRelationshipMapping() {
	return this.getJoinStrategy().getRelationship().getMapping();
	}

	public PersistentAttribute getPersistentAttribute() {
	return this.getRelationshipMapping().getPersistentAttribute();
	}


	// ******** join column owners ********

	/**
	* just a little common behavior
	*/
	protected abstract class AbstractJoinColumnOwner
	implements ReadOnlyJoinColumn.Owner
	{
	protected AbstractJoinColumnOwner() {
	super();
	}

	public TypeMapping getTypeMapping() {
	return this.getRelationship().getTypeMapping();
	}

	/**
	* by default, the join column is, obviously, in the join table;
	* not sure whether it can be anywhere else...
	*/
	public String getDefaultTableName() {
	return GenericOrmVirtualJoinTable.this.getName();
	}

	/**
	* @see MappingTools#buildJoinColumnDefaultName(org.eclipse.jpt.jpa.core.context.ReadOnlyJoinColumn, org.eclipse.jpt.jpa.core.context.ReadOnlyJoinColumn.Owner)
	*/
	public String getDefaultColumnName() {
	throw new UnsupportedOperationException();
	}

	protected OrmVirtualRelationship getRelationship() {
	return GenericOrmVirtualJoinTable.this.getJoinStrategy().getRelationship();
	}
	}


	/**
	* owner for "back-pointer" join columns;
	* these point at the source/owning entity
	*/
	protected class JoinColumnOwner
	extends AbstractJoinColumnOwner
	{
	protected JoinColumnOwner() {
	super();
	}

	public Entity getRelationshipTarget() {
	return this.getRelationship().getEntity();
	}

	public String getAttributeName() {
	return MappingTools.getTargetAttributeName(GenericOrmVirtualJoinTable.this.getRelationshipMapping());
	}

	public boolean joinColumnIsDefault(ReadOnlyBaseJoinColumn joinColumn) {
	return GenericOrmVirtualJoinTable.this.defaultJoinColumn == joinColumn;
	}

	public int joinColumnsSize() {
	return GenericOrmVirtualJoinTable.this.joinColumnsSize();
	}
	}


	/**
	* owner for "forward-pointer" join columns;
	* these point at the target/inverse entity
	*/
	protected class InverseJoinColumnOwner
	extends AbstractJoinColumnOwner
	{
	protected InverseJoinColumnOwner() {
	super();
	}

	public Entity getRelationshipTarget() {
	RelationshipMapping relationshipMapping = GenericOrmVirtualJoinTable.this.getRelationshipMapping();
	return (relationshipMapping == null) ? null : relationshipMapping.getResolvedTargetEntity();
	}

	public String getAttributeName() {
	RelationshipMapping relationshipMapping = GenericOrmVirtualJoinTable.this.getRelationshipMapping();
	return (relationshipMapping == null) ? null : relationshipMapping.getName();
	}

	public boolean joinColumnIsDefault(ReadOnlyBaseJoinColumn joinColumn) {
	return GenericOrmVirtualJoinTable.this.defaultInverseJoinColumn == joinColumn;
	}

	public int joinColumnsSize() {
	return GenericOrmVirtualJoinTable.this.inverseJoinColumnsSize();
	}
	}
	}