/*******************************************************************************
 * Copyright (c) 2005, 2009 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.ant.internal.launching.debug.model;

import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.model.IValue;
import org.eclipse.debug.core.model.IVariable;

public class AntProperties extends AntDebugElement implements IVariable {
	
	private IValue fValue;
	private String fName;
    private boolean fValid= true;

	public AntProperties(AntDebugTarget target, String name) {
		super(target);
		fName= name;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IVariable#getValue()
	 */
	public synchronized IValue getValue() throws DebugException {
        int attempts= 0;
        while (!fValid && !getDebugTarget().isTerminated()) {
            try {
                wait(50);
            } catch (InterruptedException e) {
            }
            if (attempts == 20 && !fValid && !getDebugTarget().isTerminated()) {
                throwDebugException(DebugModelMessages.AntProperties_1);
            }
            attempts++;
        }
 		return fValue;
	}
    
    public IValue getLastValue() {
        return fValue;
    }

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

	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.model.IVariable#getReferenceTypeName()
	 */
	public String getReferenceTypeName() {
		return ""; //$NON-NLS-1$
	}

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

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

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

	/* (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) {
		return false;
	}

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

    public synchronized void setValid(boolean valid) {
        fValid= valid;        
        notifyAll();
    }
}