/*******************************************************************************
 * Copyright (c) 2007, 2012 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.jpa.core.internal.resource.java.source;

import org.eclipse.jdt.core.dom.CompilationUnit;
import org.eclipse.jpt.common.core.internal.resource.java.source.SourceAnnotation;
import org.eclipse.jpt.common.core.internal.utility.jdt.AnnotatedElementAnnotationElementAdapter;
import org.eclipse.jpt.common.core.internal.utility.jdt.ConversionDeclarationAnnotationElementAdapter;
import org.eclipse.jpt.common.core.internal.utility.jdt.SimpleDeclarationAnnotationAdapter;
import org.eclipse.jpt.common.core.resource.java.JavaResourceAnnotatedElement;
import org.eclipse.jpt.common.core.utility.TextRange;
import org.eclipse.jpt.common.core.utility.jdt.AnnotatedElement;
import org.eclipse.jpt.common.core.utility.jdt.AnnotationElementAdapter;
import org.eclipse.jpt.common.core.utility.jdt.DeclarationAnnotationAdapter;
import org.eclipse.jpt.common.core.utility.jdt.DeclarationAnnotationElementAdapter;
import org.eclipse.jpt.jpa.core.resource.java.JPA;
import org.eclipse.jpt.jpa.core.resource.java.MapKeyAnnotation;

/**
 * <code>javax.persistence.MapKey</code>
 */
public final class SourceMapKeyAnnotation
	extends SourceAnnotation
	implements MapKeyAnnotation
{
	private static final DeclarationAnnotationAdapter DECLARATION_ANNOTATION_ADAPTER = new SimpleDeclarationAnnotationAdapter(ANNOTATION_NAME);

	private static final DeclarationAnnotationElementAdapter<String> NAME_ADAPTER = buildNameAdapter();
	private final AnnotationElementAdapter<String> nameAdapter;
	private String name;
	private TextRange nameTextRange;


	public SourceMapKeyAnnotation(JavaResourceAnnotatedElement parent, AnnotatedElement element) {
		super(parent, element, DECLARATION_ANNOTATION_ADAPTER);
		this.nameAdapter = new AnnotatedElementAnnotationElementAdapter<String>(element, NAME_ADAPTER);
	}

	public String getAnnotationName() {
		return ANNOTATION_NAME;
	}

	public void initialize(CompilationUnit astRoot) {
		this.name = this.buildName(astRoot);
		this.nameTextRange = this.buildNameTextRange(astRoot);
	}

	public void synchronizeWith(CompilationUnit astRoot) {
		this.syncName(this.buildName(astRoot));
		this.nameTextRange = this.buildNameTextRange(astRoot);
	}

	@Override
	public boolean isUnset() {
		return super.isUnset() &&
				(this.name == null);
	}

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


	// ********** MapKeyAnnotation implementation **********

	// ***** name
	public String getName() {
		return this.name;
	}

	public void setName(String name) {
		if (this.attributeValueHasChanged(this.name, name)) {
			this.name = name;
			this.nameAdapter.setValue(name);
		}
	}

	private void syncName(String astName) {
		String old = this.name;
		this.name = astName;
		this.firePropertyChanged(NAME_PROPERTY, old, astName);
	}

	private String buildName(CompilationUnit astRoot) {
		return this.nameAdapter.getValue(astRoot);
	}

	public TextRange getNameTextRange() {
		return this.nameTextRange;
	}

	public TextRange buildNameTextRange(CompilationUnit astRoot) {
		return this.getElementTextRange(NAME_ADAPTER, astRoot);
	}

	public boolean nameTouches(int pos) {
		return this.textRangeTouches(nameTextRange, pos);
	}


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

	private static DeclarationAnnotationElementAdapter<String> buildNameAdapter() {
		return ConversionDeclarationAnnotationElementAdapter.forStrings(DECLARATION_ANNOTATION_ADAPTER, JPA.MAP_KEY__NAME);
	}
}