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

 /*******************************************************************************
  * Copyright (c) 2009, 2010 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.core.internal.context.orm;

 import java.util.Iterator;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.Vector;
 import org.eclipse.jpt.core.context.JoinColumn;
 import org.eclipse.jpt.core.context.JoinColumnEnabledRelationshipReference;
 import org.eclipse.jpt.core.context.JoinColumnJoiningStrategy;
 import org.eclipse.jpt.core.context.RelationshipMapping;
 import org.eclipse.jpt.core.context.TypeMapping;
 import org.eclipse.jpt.core.context.orm.OrmJoinColumn;
 import org.eclipse.jpt.core.context.orm.OrmJoinColumnJoiningStrategy;
 import org.eclipse.jpt.core.resource.orm.OrmFactory;
 import org.eclipse.jpt.core.resource.orm.XmlJoinColumn;
 import org.eclipse.jpt.core.resource.orm.XmlJoinColumnsMapping;
 import org.eclipse.jpt.db.Table;
 import org.eclipse.jpt.utility.internal.CollectionTools;
 import org.eclipse.jpt.utility.internal.iterators.CloneIterator;
 import org.eclipse.jpt.utility.internal.iterators.CloneListIterator;
 import org.eclipse.jpt.utility.internal.iterators.EmptyIterator;
 import org.eclipse.jpt.utility.internal.iterators.EmptyListIterator;
 import org.eclipse.jpt.utility.internal.iterators.SingleElementListIterator;
 import org.eclipse.wst.validation.internal.provisional.core.IMessage;
 import org.eclipse.wst.validation.internal.provisional.core.IReporter;

 public abstract class AbstractOrmJoinColumnJoiningStrategy
 	extends AbstractOrmXmlContextNode
 	implements OrmJoinColumnJoiningStrategy
 {
 	protected OrmJoinColumn defaultJoinColumn;

 	protected final Vector<OrmJoinColumn> specifiedJoinColumns = new Vector<OrmJoinColumn>();

 	protected final OrmJoinColumn.Owner joinColumnOwner;

 	protected XmlJoinColumnsMapping resource;


 	protected AbstractOrmJoinColumnJoiningStrategy(
 			JoinColumnEnabledRelationshipReference parent,
 			XmlJoinColumnsMapping resource) {
 		super(parent);
 		this.resource = resource;
 		this.joinColumnOwner = this.buildJoinColumnOwner();
 		this.initializeSpecifiedJoinColumns();
 		this.initializeDefaultJoinColumn();
 	}

 	public void initializeFrom(JoinColumnJoiningStrategy oldStrategy) {
 		for (JoinColumn joinColumn : CollectionTools.iterable(oldStrategy.joinColumns())) {
 			JoinColumn newJoinColumn = this.addSpecifiedJoinColumn(this.specifiedJoinColumnsSize());
 			newJoinColumn.setSpecifiedName(joinColumn.getName());
 			newJoinColumn.setSpecifiedReferencedColumnName(joinColumn.getReferencedColumnName());
 		}
 	}

 	protected abstract OrmJoinColumn.Owner buildJoinColumnOwner();

 	protected void initializeSpecifiedJoinColumns() {
 		for (XmlJoinColumn resourceJoinColumn : this.resource.getJoinColumns()) {
 			this.specifiedJoinColumns.add(buildJoinColumn(resourceJoinColumn));
 		}
 	}

 	protected void initializeDefaultJoinColumn() {
 		if (mayHaveDefaultJoinColumn()) {
 			this.defaultJoinColumn = this.buildJoinColumn(null);
 		}
 	}

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

 	public JoinColumnEnabledRelationshipReference getRelationshipReference() {
 		return this.getParent();
 	}

 	public RelationshipMapping getRelationshipMapping() {
 		return this.getRelationshipReference().getRelationshipMapping();
 	}

 	public String getTableName() {
 		TypeMapping typeMapping = getRelationshipSource();
 		return typeMapping == null ? null : getRelationshipSource().getPrimaryTableName();
 	}

 	public Table getDbTable(String tableName) {
 		TypeMapping typeMapping = getRelationshipSource();
 		return typeMapping == null ? null : typeMapping.getDbTable(tableName);
 	}

 	public boolean tableNameIsInvalid(String tableName) {
 		TypeMapping typeMapping = getRelationshipSource();
 		return typeMapping == null ? false : typeMapping.tableNameIsInvalid(tableName);
 	}

 	protected Iterator<String> candidateTableNames() {
 		TypeMapping typeMapping = getRelationshipSource();
 		return typeMapping == null ? EmptyIterator.<String> instance() : typeMapping.associatedTableNamesIncludingInherited();
 	}

 	public void addStrategy() {
 		if (specifiedJoinColumnsSize() == 0) {
 			addSpecifiedJoinColumn(0);
 		}
 	}

 	public void removeStrategy() {
 		for (JoinColumn each : CollectionTools.iterable(specifiedJoinColumns())) {
 			removeSpecifiedJoinColumn(each);
 		}
 	}

 	public Table getReferencedColumnDbTable() {
 		TypeMapping relationshipTarget = getRelationshipTarget();
 		return (relationshipTarget == null) ? null : relationshipTarget.getPrimaryDbTable();
 	}


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

 	public ListIterator<OrmJoinColumn> joinColumns() {
 		return this.hasSpecifiedJoinColumns() ?
 			this.specifiedJoinColumns() : this.defaultJoinColumns();
 	}

 	public int joinColumnsSize() {
 		return this.hasSpecifiedJoinColumns() ?
 			this.specifiedJoinColumnsSize() : this.defaultJoinColumnsSize();
 	}


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

 	public OrmJoinColumn getDefaultJoinColumn() {
 		return this.defaultJoinColumn;
 	}

 	protected void setDefaultJoinColumn(OrmJoinColumn joinColumn) {
 		OrmJoinColumn old = this.defaultJoinColumn;
 		this.defaultJoinColumn = joinColumn;
 		this.firePropertyChanged(DEFAULT_JOIN_COLUMN_PROPERTY, old, joinColumn);
 	}

 	protected ListIterator<OrmJoinColumn> defaultJoinColumns() {
 		if (this.defaultJoinColumn != null) {
 			return new SingleElementListIterator<OrmJoinColumn>(this.defaultJoinColumn);
 		}
 		return EmptyListIterator.instance();
 	}

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


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

 	public ListIterator<OrmJoinColumn> specifiedJoinColumns() {
 		return new CloneListIterator<OrmJoinColumn>(this.specifiedJoinColumns);
 	}

 	public int specifiedJoinColumnsSize() {
 		return this.specifiedJoinColumns.size();
 	}

 	public boolean hasSpecifiedJoinColumns() {
 		return ! this.specifiedJoinColumns.isEmpty();
 	}

 	public OrmJoinColumn addSpecifiedJoinColumn(int index) {
 		OrmJoinColumn oldDefaultJoinColumn = this.defaultJoinColumn;
 		if (oldDefaultJoinColumn != null) {
 			//null the default join column now if one already exists.
 			//if one does not exist, there is already a specified join column.
 			//Remove it now so that it doesn't get removed during an update and
 			//cause change notifications to be sent to the UI in the wrong order
 			this.defaultJoinColumn = null;
 		}
 		XmlJoinColumn resourceJoinColumn = OrmFactory.eINSTANCE.createXmlJoinColumn();
 		OrmJoinColumn contextJoinColumn = this.buildJoinColumn(resourceJoinColumn);
 		this.specifiedJoinColumns.add(index, contextJoinColumn);
 		this.resource.getJoinColumns().add(index, resourceJoinColumn);
 		this.fireItemAdded(SPECIFIED_JOIN_COLUMNS_LIST, index, contextJoinColumn);
 		if (oldDefaultJoinColumn != null) {
 			this.firePropertyChanged(DEFAULT_JOIN_COLUMN_PROPERTY, oldDefaultJoinColumn, null);
 		}
 		return contextJoinColumn;
 	}

 	protected void addSpecifiedJoinColumn(int index, OrmJoinColumn joinColumn) {
 		this.addItemToList(index, joinColumn, this.specifiedJoinColumns, SPECIFIED_JOIN_COLUMNS_LIST);
 	}

 	protected void addSpecifiedJoinColumn(OrmJoinColumn joinColumn) {
 		this.addSpecifiedJoinColumn(this.specifiedJoinColumns.size(), joinColumn);
 	}

 	public void removeSpecifiedJoinColumn(JoinColumn joinColumn) {
 		this.removeSpecifiedJoinColumn(this.specifiedJoinColumns.indexOf(joinColumn));
 	}

 	public void removeSpecifiedJoinColumn(int index) {
 		OrmJoinColumn removedJoinColumn = this.specifiedJoinColumns.remove(index);
 		if (this.specifiedJoinColumns.isEmpty()) {
 			//create the defaultJoinColumn now or this will happen during project update
 			//after removing the join column from the resource model. That causes problems
 			//in the UI because the change notifications end up in the wrong order.
 			this.defaultJoinColumn = this.buildJoinColumn(null);
 		}
 		this.resource.getJoinColumns().remove(index);
 		this.fireItemRemoved(SPECIFIED_JOIN_COLUMNS_LIST, index, removedJoinColumn);
 		if (this.defaultJoinColumn != null) {
 			//fire change notification if a defaultJoinColumn was created above
 			this.firePropertyChanged(DEFAULT_JOIN_COLUMN_PROPERTY, null, this.defaultJoinColumn);
 		}
 	}

 	protected void removeSpecifiedJoinColumn_(OrmJoinColumn joinColumn) {
 		removeItemFromList(joinColumn, this.specifiedJoinColumns, SPECIFIED_JOIN_COLUMNS_LIST);
 	}

 	public void moveSpecifiedJoinColumn(int targetIndex, int sourceIndex) {
 		CollectionTools.move(this.specifiedJoinColumns, targetIndex, sourceIndex);
 		this.resource.getJoinColumns().move(targetIndex, sourceIndex);
 		fireItemMoved(SPECIFIED_JOIN_COLUMNS_LIST, targetIndex, sourceIndex);
 	}

 	protected OrmJoinColumn buildJoinColumn(XmlJoinColumn resourceJoinColumn) {
 		return this.getXmlContextNodeFactory().buildOrmJoinColumn(this, this.joinColumnOwner, resourceJoinColumn);
 	}

 	// **************** resource => context ************************************

 	public void update() {
 		updateSpecifiedJoinColumns();
 		updateDefaultJoinColumn();
 	}

 	protected void updateSpecifiedJoinColumns() {
 		// make a copy of the XML join columns (to prevent ConcurrentModificationException)
 		Iterator<XmlJoinColumn> xmlJoinColumns =
 			new CloneIterator<XmlJoinColumn>(this.resource.getJoinColumns());

 		for (Iterator<OrmJoinColumn> contextJoinColumns = this.specifiedJoinColumns();
 				contextJoinColumns.hasNext(); ) {
 			OrmJoinColumn contextJoinColumn = contextJoinColumns.next();
 			if (xmlJoinColumns.hasNext()) {
 				contextJoinColumn.update(xmlJoinColumns.next());
 			}
 			else {
 				removeSpecifiedJoinColumn_(contextJoinColumn);
 			}
 		}

 		while (xmlJoinColumns.hasNext()) {
 			addSpecifiedJoinColumn(buildJoinColumn(xmlJoinColumns.next()));
 		}
 	}

 	protected void updateDefaultJoinColumn() {
 		if (mayHaveDefaultJoinColumn()) {
 			if (this.defaultJoinColumn == null) {
 				this.setDefaultJoinColumn(this.buildJoinColumn(null));
 			} else {
 				this.defaultJoinColumn.update(null);
 			}
 		} else {
 			this.setDefaultJoinColumn(null);
 		}
 	}

 	protected boolean mayHaveDefaultJoinColumn() {
 		return getRelationshipReference().mayHaveDefaultJoinColumn()
 			&& ! hasSpecifiedJoinColumns();
 	}


 	// **************** validation *********************************************

 	@Override
 	public void validate(List<IMessage> messages, IReporter reporter) {
 		super.validate(messages, reporter);
 		for (Iterator<OrmJoinColumn> stream = this.joinColumns(); stream.hasNext(); ) {
 			stream.next().validate(messages, reporter);
 		}
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2009, 2010 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.core.internal.context.orm;

	import java.util.Iterator;
	import java.util.List;
	import java.util.ListIterator;
	import java.util.Vector;
	import org.eclipse.jpt.core.context.JoinColumn;
	import org.eclipse.jpt.core.context.JoinColumnEnabledRelationshipReference;
	import org.eclipse.jpt.core.context.JoinColumnJoiningStrategy;
	import org.eclipse.jpt.core.context.RelationshipMapping;
	import org.eclipse.jpt.core.context.TypeMapping;
	import org.eclipse.jpt.core.context.orm.OrmJoinColumn;
	import org.eclipse.jpt.core.context.orm.OrmJoinColumnJoiningStrategy;
	import org.eclipse.jpt.core.resource.orm.OrmFactory;
	import org.eclipse.jpt.core.resource.orm.XmlJoinColumn;
	import org.eclipse.jpt.core.resource.orm.XmlJoinColumnsMapping;
	import org.eclipse.jpt.db.Table;
	import org.eclipse.jpt.utility.internal.CollectionTools;
	import org.eclipse.jpt.utility.internal.iterators.CloneIterator;
	import org.eclipse.jpt.utility.internal.iterators.CloneListIterator;
	import org.eclipse.jpt.utility.internal.iterators.EmptyIterator;
	import org.eclipse.jpt.utility.internal.iterators.EmptyListIterator;
	import org.eclipse.jpt.utility.internal.iterators.SingleElementListIterator;
	import org.eclipse.wst.validation.internal.provisional.core.IMessage;
	import org.eclipse.wst.validation.internal.provisional.core.IReporter;

	public abstract class AbstractOrmJoinColumnJoiningStrategy
	extends AbstractOrmXmlContextNode
	implements OrmJoinColumnJoiningStrategy
	{
	protected OrmJoinColumn defaultJoinColumn;

	protected final Vector<OrmJoinColumn> specifiedJoinColumns = new Vector<OrmJoinColumn>();

	protected final OrmJoinColumn.Owner joinColumnOwner;

	protected XmlJoinColumnsMapping resource;


	protected AbstractOrmJoinColumnJoiningStrategy(
	JoinColumnEnabledRelationshipReference parent,
	XmlJoinColumnsMapping resource) {
	super(parent);
	this.resource = resource;
	this.joinColumnOwner = this.buildJoinColumnOwner();
	this.initializeSpecifiedJoinColumns();
	this.initializeDefaultJoinColumn();
	}

	public void initializeFrom(JoinColumnJoiningStrategy oldStrategy) {
	for (JoinColumn joinColumn : CollectionTools.iterable(oldStrategy.joinColumns())) {
	JoinColumn newJoinColumn = this.addSpecifiedJoinColumn(this.specifiedJoinColumnsSize());
	newJoinColumn.setSpecifiedName(joinColumn.getName());
	newJoinColumn.setSpecifiedReferencedColumnName(joinColumn.getReferencedColumnName());
	}
	}

	protected abstract OrmJoinColumn.Owner buildJoinColumnOwner();

	protected void initializeSpecifiedJoinColumns() {
	for (XmlJoinColumn resourceJoinColumn : this.resource.getJoinColumns()) {
	this.specifiedJoinColumns.add(buildJoinColumn(resourceJoinColumn));
	}
	}

	protected void initializeDefaultJoinColumn() {
	if (mayHaveDefaultJoinColumn()) {
	this.defaultJoinColumn = this.buildJoinColumn(null);
	}
	}

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

	public JoinColumnEnabledRelationshipReference getRelationshipReference() {
	return this.getParent();
	}

	public RelationshipMapping getRelationshipMapping() {
	return this.getRelationshipReference().getRelationshipMapping();
	}

	public String getTableName() {
	TypeMapping typeMapping = getRelationshipSource();
	return typeMapping == null ? null : getRelationshipSource().getPrimaryTableName();
	}

	public Table getDbTable(String tableName) {
	TypeMapping typeMapping = getRelationshipSource();
	return typeMapping == null ? null : typeMapping.getDbTable(tableName);
	}

	public boolean tableNameIsInvalid(String tableName) {
	TypeMapping typeMapping = getRelationshipSource();
	return typeMapping == null ? false : typeMapping.tableNameIsInvalid(tableName);
	}

	protected Iterator<String> candidateTableNames() {
	TypeMapping typeMapping = getRelationshipSource();
	return typeMapping == null ? EmptyIterator.<String> instance() : typeMapping.associatedTableNamesIncludingInherited();
	}

	public void addStrategy() {
	if (specifiedJoinColumnsSize() == 0) {
	addSpecifiedJoinColumn(0);
	}
	}

	public void removeStrategy() {
	for (JoinColumn each : CollectionTools.iterable(specifiedJoinColumns())) {
	removeSpecifiedJoinColumn(each);
	}
	}

	public Table getReferencedColumnDbTable() {
	TypeMapping relationshipTarget = getRelationshipTarget();
	return (relationshipTarget == null) ? null : relationshipTarget.getPrimaryDbTable();
	}


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

	public ListIterator<OrmJoinColumn> joinColumns() {
	return this.hasSpecifiedJoinColumns() ?
	this.specifiedJoinColumns() : this.defaultJoinColumns();
	}

	public int joinColumnsSize() {
	return this.hasSpecifiedJoinColumns() ?
	this.specifiedJoinColumnsSize() : this.defaultJoinColumnsSize();
	}


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

	public OrmJoinColumn getDefaultJoinColumn() {
	return this.defaultJoinColumn;
	}

	protected void setDefaultJoinColumn(OrmJoinColumn joinColumn) {
	OrmJoinColumn old = this.defaultJoinColumn;
	this.defaultJoinColumn = joinColumn;
	this.firePropertyChanged(DEFAULT_JOIN_COLUMN_PROPERTY, old, joinColumn);
	}

	protected ListIterator<OrmJoinColumn> defaultJoinColumns() {
	if (this.defaultJoinColumn != null) {
	return new SingleElementListIterator<OrmJoinColumn>(this.defaultJoinColumn);
	}
	return EmptyListIterator.instance();
	}

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


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

	public ListIterator<OrmJoinColumn> specifiedJoinColumns() {
	return new CloneListIterator<OrmJoinColumn>(this.specifiedJoinColumns);
	}

	public int specifiedJoinColumnsSize() {
	return this.specifiedJoinColumns.size();
	}

	public boolean hasSpecifiedJoinColumns() {
	return ! this.specifiedJoinColumns.isEmpty();
	}

	public OrmJoinColumn addSpecifiedJoinColumn(int index) {
	OrmJoinColumn oldDefaultJoinColumn = this.defaultJoinColumn;
	if (oldDefaultJoinColumn != null) {
	//null the default join column now if one already exists.
	//if one does not exist, there is already a specified join column.
	//Remove it now so that it doesn't get removed during an update and
	//cause change notifications to be sent to the UI in the wrong order
	this.defaultJoinColumn = null;
	}
	XmlJoinColumn resourceJoinColumn = OrmFactory.eINSTANCE.createXmlJoinColumn();
	OrmJoinColumn contextJoinColumn = this.buildJoinColumn(resourceJoinColumn);
	this.specifiedJoinColumns.add(index, contextJoinColumn);
	this.resource.getJoinColumns().add(index, resourceJoinColumn);
	this.fireItemAdded(SPECIFIED_JOIN_COLUMNS_LIST, index, contextJoinColumn);
	if (oldDefaultJoinColumn != null) {
	this.firePropertyChanged(DEFAULT_JOIN_COLUMN_PROPERTY, oldDefaultJoinColumn, null);
	}
	return contextJoinColumn;
	}

	protected void addSpecifiedJoinColumn(int index, OrmJoinColumn joinColumn) {
	this.addItemToList(index, joinColumn, this.specifiedJoinColumns, SPECIFIED_JOIN_COLUMNS_LIST);
	}

	protected void addSpecifiedJoinColumn(OrmJoinColumn joinColumn) {
	this.addSpecifiedJoinColumn(this.specifiedJoinColumns.size(), joinColumn);
	}

	public void removeSpecifiedJoinColumn(JoinColumn joinColumn) {
	this.removeSpecifiedJoinColumn(this.specifiedJoinColumns.indexOf(joinColumn));
	}

	public void removeSpecifiedJoinColumn(int index) {
	OrmJoinColumn removedJoinColumn = this.specifiedJoinColumns.remove(index);
	if (this.specifiedJoinColumns.isEmpty()) {
	//create the defaultJoinColumn now or this will happen during project update
	//after removing the join column from the resource model. That causes problems
	//in the UI because the change notifications end up in the wrong order.
	this.defaultJoinColumn = this.buildJoinColumn(null);
	}
	this.resource.getJoinColumns().remove(index);
	this.fireItemRemoved(SPECIFIED_JOIN_COLUMNS_LIST, index, removedJoinColumn);
	if (this.defaultJoinColumn != null) {
	//fire change notification if a defaultJoinColumn was created above
	this.firePropertyChanged(DEFAULT_JOIN_COLUMN_PROPERTY, null, this.defaultJoinColumn);
	}
	}

	protected void removeSpecifiedJoinColumn_(OrmJoinColumn joinColumn) {
	removeItemFromList(joinColumn, this.specifiedJoinColumns, SPECIFIED_JOIN_COLUMNS_LIST);
	}

	public void moveSpecifiedJoinColumn(int targetIndex, int sourceIndex) {
	CollectionTools.move(this.specifiedJoinColumns, targetIndex, sourceIndex);
	this.resource.getJoinColumns().move(targetIndex, sourceIndex);
	fireItemMoved(SPECIFIED_JOIN_COLUMNS_LIST, targetIndex, sourceIndex);
	}

	protected OrmJoinColumn buildJoinColumn(XmlJoinColumn resourceJoinColumn) {
	return this.getXmlContextNodeFactory().buildOrmJoinColumn(this, this.joinColumnOwner, resourceJoinColumn);
	}

	// ************** resource => context **********************************

	public void update() {
	updateSpecifiedJoinColumns();
	updateDefaultJoinColumn();
	}

	protected void updateSpecifiedJoinColumns() {
	// make a copy of the XML join columns (to prevent ConcurrentModificationException)
	Iterator<XmlJoinColumn> xmlJoinColumns =
	new CloneIterator<XmlJoinColumn>(this.resource.getJoinColumns());

	for (Iterator<OrmJoinColumn> contextJoinColumns = this.specifiedJoinColumns();
	contextJoinColumns.hasNext(); ) {
	OrmJoinColumn contextJoinColumn = contextJoinColumns.next();
	if (xmlJoinColumns.hasNext()) {
	contextJoinColumn.update(xmlJoinColumns.next());
	}
	else {
	removeSpecifiedJoinColumn_(contextJoinColumn);
	}
	}

	while (xmlJoinColumns.hasNext()) {
	addSpecifiedJoinColumn(buildJoinColumn(xmlJoinColumns.next()));
	}
	}

	protected void updateDefaultJoinColumn() {
	if (mayHaveDefaultJoinColumn()) {
	if (this.defaultJoinColumn == null) {
	this.setDefaultJoinColumn(this.buildJoinColumn(null));
	} else {
	this.defaultJoinColumn.update(null);
	}
	} else {
	this.setDefaultJoinColumn(null);
	}
	}

	protected boolean mayHaveDefaultJoinColumn() {
	return getRelationshipReference().mayHaveDefaultJoinColumn()
	&& ! hasSpecifiedJoinColumns();
	}


	// ************** validation *******************************************

	@Override
	public void validate(List<IMessage> messages, IReporter reporter) {
	super.validate(messages, reporter);
	for (Iterator<OrmJoinColumn> stream = this.joinColumns(); stream.hasNext(); ) {
	stream.next().validate(messages, reporter);
	}
	}
	}