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/*******************************************************************************
 * Copyright (c) 2007, 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.resource.java.source;

import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.core.internal.utility.jdt.ConversionDeclarationAnnotationElementAdapter;
import org.eclipse.jpt.core.internal.utility.jdt.ASTTools;
import org.eclipse.jpt.core.internal.utility.jdt.AnnotatedElementAnnotationElementAdapter;
import org.eclipse.jpt.core.internal.utility.jdt.SimpleDeclarationAnnotationAdapter;
import org.eclipse.jpt.core.internal.utility.jdt.SimpleTypeStringExpressionConverter;
import org.eclipse.jpt.core.resource.java.IdClassAnnotation;
import org.eclipse.jpt.core.resource.java.JPA;
import org.eclipse.jpt.core.resource.java.JavaResourcePersistentType;
import org.eclipse.jpt.core.utility.TextRange;
import org.eclipse.jpt.core.utility.jdt.AnnotationElementAdapter;
import org.eclipse.jpt.core.utility.jdt.DeclarationAnnotationAdapter;
import org.eclipse.jpt.core.utility.jdt.DeclarationAnnotationElementAdapter;
import org.eclipse.jpt.core.utility.jdt.Type;

/**
 * javax.persistence.IdClass
 */
public final class SourceIdClassAnnotation
	extends SourceAnnotation<Type>
	implements IdClassAnnotation
{
	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;

	private String fullyQualifiedClassName;


	public SourceIdClassAnnotation(JavaResourcePersistentType parent, Type type) {
		super(parent, type, DECLARATION_ANNOTATION_ADAPTER);
		this.valueAdapter = new AnnotatedElementAnnotationElementAdapter<String>(type, VALUE_ADAPTER);
	}

	public String getAnnotationName() {
		return ANNOTATION_NAME;
	}

	public void initialize(CompilationUnit astRoot) {
		this.value = this.buildValue(astRoot);
		this.fullyQualifiedClassName = this.buildFullyQualifiedClassName(astRoot);
	}

	public void synchronizeWith(CompilationUnit astRoot) {
		this.syncValue(this.buildValue(astRoot));
		this.syncFullyQualifiedClassName(this.buildFullyQualifiedClassName(astRoot));
	}

	@Override
	public void toString(StringBuilder sb) {
		sb.append(this.value);
	}


	// ********** IdClassAnnotation implementation **********

	// ***** value
	public String getValue() {
		return this.value;
	}

	public void setValue(String value) {
		if (this.attributeValueHasChanged(this.value, value)) {
			this.value = value;
			this.valueAdapter.setValue(value);
		}
	}

	private void syncValue(String astValue) {
		String old = this.value;
		this.value = astValue;
		this.firePropertyChanged(VALUE_PROPERTY, old, astValue);
	}

	private String buildValue(CompilationUnit astRoot) {
		return this.valueAdapter.getValue(astRoot);
	}

	public TextRange getValueTextRange(CompilationUnit astRoot) {
		return this.getElementTextRange(VALUE_ADAPTER, astRoot);
	}

	// ***** fully-qualified class name
	public String getFullyQualifiedClassName() {
		return this.fullyQualifiedClassName;
	}

	private void syncFullyQualifiedClassName(String astFullyQualifiedClassName) {
		String old = this.fullyQualifiedClassName;
		this.fullyQualifiedClassName = astFullyQualifiedClassName;
		this.firePropertyChanged(FULLY_QUALIFIED_CLASS_NAME_PROPERTY, old, astFullyQualifiedClassName);
	}

	private String buildFullyQualifiedClassName(CompilationUnit astRoot) {
		return (this.value == null) ? null : ASTTools.resolveFullyQualifiedName(this.valueAdapter.getExpression(astRoot));
	}


	// ********** static methods **********

	protected static DeclarationAnnotationElementAdapter<String> buildValueAdapter() {
		return new ConversionDeclarationAnnotationElementAdapter<String>(DECLARATION_ANNOTATION_ADAPTER, JPA.ID_CLASS__VALUE, SimpleTypeStringExpressionConverter.instance());
	}

}

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