/*******************************************************************************
 * Copyright (c) 2010 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.wst.jsdt.debug.internal.core.model;

import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IValue;
import org.eclipse.debug.core.model.IVariable;
import org.eclipse.wst.jsdt.debug.core.jsdi.Variable;

/**
 * Default implementation of an {@link IVariable}
 * 
 * @see JavaScriptValue
 * @see JavaScriptStackFrame
 * @see StackFrameReference
 * @see Variable
 * @since 1.0
 */
public class JavaScriptVariable extends JavaScriptDebugElement implements IVariable {

	private Variable variable;
	private JavaScriptValue value = null;

	/**
	 * Constructor
	 * 
	 * @param frame
	 * @param variable
	 */
	public JavaScriptVariable(JavaScriptStackFrame frame, Variable variable) {
		super(frame.getJavaScriptDebugTarget());
		this.variable = variable;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IVariable#getName()
	 */
	public String getName() {
		return this.variable.name();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IVariable#getReferenceTypeName()
	 */
	public String getReferenceTypeName() throws DebugException {
		return getValue().getReferenceTypeName();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IVariable#getValue()
	 */
	public IValue getValue() throws DebugException {
		if (this.value == null) {
			this.value = new JavaScriptValue(getJavaScriptDebugTarget(), this.variable.value());
		}
		return this.value;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IVariable#hasValueChanged()
	 */
	public boolean hasValueChanged() throws DebugException {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.runtime.IAdaptable#getAdapter(java.lang.Class)
	 */
	public Object getAdapter(Class adapter) {
		if (adapter == JavaScriptVariable.class) {
			return this;
		}
		return super.getAdapter(adapter);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IValueModification#setValue(java.lang.String)
	 */
	public void setValue(String expression) throws DebugException {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IValueModification#setValue(org.eclipse.debug.core.model.IValue)
	 */
	public void setValue(IValue value) throws DebugException {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IValueModification#supportsValueModification()
	 */
	public boolean supportsValueModification() {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IValueModification#verifyValue(java.lang.String)
	 */
	public boolean verifyValue(String expression) throws DebugException {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.debug.core.model.IValueModification#verifyValue(org.eclipse.debug.core.model.IValue)
	 */
	public boolean verifyValue(IValue value) throws DebugException {
		return false;
	}
}