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/*******************************************************************************
* Copyright (c) 2008 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.ui.internal.mappings.details;
import java.util.ListIterator;
import org.eclipse.jpt.core.context.Entity;
import org.eclipse.jpt.core.context.JoinColumn;
import org.eclipse.jpt.core.context.JoinTable;
import org.eclipse.jpt.core.context.RelationshipMapping;
import org.eclipse.jpt.db.Schema;
import org.eclipse.jpt.db.Table;
import org.eclipse.jpt.utility.internal.iterators.SingleElementListIterator;
/**
* The state object used to create or edit a primary key join column on a join
* table.
*
* @see JoinColumn
* @see JoinTable
* @see InverseJoinColumnInJoinTableDialog
*
* @version 2.0
* @since 2.0
*/
public class InverseJoinColumnInJoinTableStateObject extends JoinColumnStateObject
{
/**
* Creates a new <code>JoinColumnInJoinTableStateObject</code>.
*
* @param joinTable
* @param joinColumn Either the join column to edit or <code>null</code> if
* this state object is used to create a new one
*/
public InverseJoinColumnInJoinTableStateObject(JoinTable joinTable,
JoinColumn joinColumn) {
super(joinTable, joinColumn);
}
@Override
public String getDefaultTable() {
return null;
}
@Override
public Table getNameTable() {
return getOwner().getDbTable();
}
@Override
public JoinTable getOwner() {
return (JoinTable) super.getOwner();
}
@Override
public Table getReferencedNameTable() {
Entity targetEntity = getRelationshipMapping().getResolvedTargetEntity();
if (targetEntity == null) {
return null;
}
return targetEntity.getPrimaryDbTable();
}
@Override
protected Schema getDbSchema() {
return null;
}
@Override
protected String getInitialTable() {
return getOwner().getName();
}
@Override
protected boolean isTableEditable() {
return false;
}
/**
* Returns the mapping where the join column is located.
*
* @return The owner of the join column to create or to edit
*/
public RelationshipMapping getRelationshipMapping() {
return getOwner().getParent();
}
@Override
public ListIterator<String> tables() {
return new SingleElementListIterator<String>(getInitialTable());
}
}
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