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/*******************************************************************************
* Copyright (c) 2009, 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.core.internal.context.java;
import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.common.core.utility.TextRange;
import org.eclipse.jpt.core.context.Entity;
import org.eclipse.jpt.core.context.RelationshipStrategy;
import org.eclipse.jpt.core.context.MappedByRelationship;
import org.eclipse.jpt.core.context.ReadOnlyJoinColumnRelationship;
import org.eclipse.jpt.core.context.ReadOnlyJoinTableRelationship;
import org.eclipse.jpt.core.context.ReadOnlyRelationship;
import org.eclipse.jpt.core.context.TypeMapping;
import org.eclipse.jpt.core.context.java.JavaRelationshipStrategy;
import org.eclipse.jpt.core.context.java.JavaMappingRelationship;
import org.eclipse.jpt.core.context.java.JavaRelationshipMapping;
/**
* <strong>NB:</strong> Subclasses may want to set the {@link #strategy} at the
* end of their constructors; otherwise, it will be <code>null</code> until it
* is set during {@link #update()}.
*/
public abstract class AbstractJavaMappingRelationship<M extends JavaRelationshipMapping>
extends AbstractJavaJpaContextNode
implements JavaMappingRelationship
{
protected JavaRelationshipStrategy strategy;
public AbstractJavaMappingRelationship(M parent) {
super(parent);
}
// ********** synchronize/update **********
@Override
public void update() {
super.update();
this.updateStrategy();
}
// ********** strategy **********
public JavaRelationshipStrategy getStrategy() {
return this.strategy;
}
protected void setStrategy(JavaRelationshipStrategy strategy) {
RelationshipStrategy old = this.strategy;
this.strategy = strategy;
this.firePropertyChanged(STRATEGY_PROPERTY, old, strategy);
}
protected abstract JavaRelationshipStrategy buildStrategy();
/**
* This is called by subclasses when the various supported strategies are
* added or removed; allowing the strategy to be set synchronously. (?)
*/
protected void updateStrategy() {
this.setStrategy(this.buildStrategy());
}
// ********** conversions **********
public void initializeFrom(ReadOnlyRelationship oldRelationship) {
oldRelationship.initializeOn(this);
}
public void initializeFromMappedByRelationship(MappedByRelationship oldRelationship) {
// NOP
}
public void initializeFromJoinTableRelationship(ReadOnlyJoinTableRelationship oldRelationship) {
// NOP
}
public void initializeFromJoinColumnRelationship(ReadOnlyJoinColumnRelationship oldRelationship) {
// NOP
}
// ********** misc **********
@Override
@SuppressWarnings("unchecked")
public M getParent() {
return (M) super.getParent();
}
public JavaRelationshipMapping getMapping() {
return this.getParent();
}
public TypeMapping getTypeMapping() {
return this.getMapping().getTypeMapping();
}
public Entity getEntity() {
TypeMapping typeMapping = this.getTypeMapping();
return (typeMapping instanceof Entity) ? (Entity) typeMapping : null;
}
public boolean isOverridable() {
return this.strategy.isOverridable();
}
public boolean isVirtual() {
return this.getMapping().getPersistentAttribute().isVirtual();
}
public boolean isTargetForeignKey() {
return false;
}
// ********** validation **********
public TextRange getValidationTextRange(CompilationUnit astRoot) {
return this.getMapping().getValidationTextRange(astRoot);
}
}
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