/*******************************************************************************
 *  Copyright (c) 2009  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.jpa2.resource.java.source;

import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.core.internal.resource.java.source.SourceAnnotation;
import org.eclipse.jpt.core.internal.utility.jdt.ConversionDeclarationAnnotationElementAdapter;
import org.eclipse.jpt.core.internal.utility.jdt.ShortCircuitAnnotationElementAdapter;
import org.eclipse.jpt.core.internal.utility.jdt.SimpleDeclarationAnnotationAdapter;
import org.eclipse.jpt.core.jpa2.resource.java.JPA2_0;
import org.eclipse.jpt.core.jpa2.resource.java.MapsId2_0Annotation;
import org.eclipse.jpt.core.resource.java.JavaResourcePersistentMember;
import org.eclipse.jpt.core.utility.TextRange;
import org.eclipse.jpt.core.utility.jdt.AnnotationElementAdapter;
import org.eclipse.jpt.core.utility.jdt.Attribute;
import org.eclipse.jpt.core.utility.jdt.DeclarationAnnotationAdapter;
import org.eclipse.jpt.core.utility.jdt.DeclarationAnnotationElementAdapter;

/**
 * javax.persistence.MapsId
 */
public class SourceMapsId2_0Annotation
	extends SourceAnnotation<Attribute>
	implements MapsId2_0Annotation
{
	private static final DeclarationAnnotationAdapter DECLARATION_ANNOTATION_ADAPTER 
			= new SimpleDeclarationAnnotationAdapter(ANNOTATION_NAME);
	
	private static final DeclarationAnnotationElementAdapter<String> VALUE_ADAPTER 
			= buildValueAdapter();
	
	
	private final AnnotationElementAdapter<String> valueAdapter;
	
	private String value;
	
	
	public SourceMapsId2_0Annotation(JavaResourcePersistentMember parent, Attribute attribute) {
		super(parent, attribute, DECLARATION_ANNOTATION_ADAPTER);
		this.valueAdapter = new ShortCircuitAnnotationElementAdapter<String>(attribute, VALUE_ADAPTER);
	}
	
	
	public String getAnnotationName() {
		return ANNOTATION_NAME;
	}
	
	public void initialize(CompilationUnit astRoot) {
		this.value = this.buildValue(astRoot);
	}
	
	public void update(CompilationUnit astRoot) {
		this.setValue(this.buildValue(astRoot));
	}
	
	@Override
	public void toString(StringBuilder sb) {
		sb.append(this.value);
	}
	
	
	// ********** MapsId2_0Annotation implementation **********
	
	public String getValue() {
		return this.value;
	}
	
	public void setValue(String newValue) {
		if (this.attributeValueHasNotChanged(this.value, newValue)) {
			return;
		}
		String oldValue = this.value;
		this.value = newValue;
		this.valueAdapter.setValue(newValue);
		this.firePropertyChanged(VALUE_PROPERTY, oldValue, newValue);
	}
	
	private String buildValue(CompilationUnit astRoot) {
		return this.valueAdapter.getValue(astRoot);
	}
	
	public TextRange getValueTextRange(CompilationUnit astRoot) {
		return this.getElementTextRange(VALUE_ADAPTER, astRoot);
	}
	
	
	// ********** static methods **********
	
	private static DeclarationAnnotationElementAdapter<String> buildValueAdapter() {
		return ConversionDeclarationAnnotationElementAdapter.forStrings(
				DECLARATION_ANNOTATION_ADAPTER, JPA2_0.MAPS_ID__VALUE, false);
	}
}