/*******************************************************************************
 * Copyright (c) 2004 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.web.ui.internal.java.refactoring;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.CompositeChange;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
import org.eclipse.ltk.core.refactoring.participants.MoveParticipant;
import org.eclipse.wst.jsdt.core.IPackageFragment;
import org.eclipse.wst.jsdt.core.IType;
import org.eclipse.wst.jsdt.web.ui.internal.JSPUIMessages;

/**
 * @author pavery
 */
public class JSPTypeMoveParticipant extends MoveParticipant {

	IType fType = null;

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#initialize(java.lang.Object)
	 */
	@Override
	protected boolean initialize(Object element) {

		if (element instanceof IType) {
			this.fType = (IType) element;
			return true;
		}
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#getName()
	 */
	@Override
	public String getName() {

		String name = ""; //$NON-NLS-1$
		if (this.fType != null) {
			name = this.fType.getElementName();
		}
		return name;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#checkConditions(org.eclipse.core.runtime.IProgressMonitor,
	 *      org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext)
	 */
	@Override
	public RefactoringStatus checkConditions(IProgressMonitor pm,
			CheckConditionsContext context) {
		// TODO Auto-generated method stub
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#createChange(org.eclipse.core.runtime.IProgressMonitor)
	 */
	@Override
	public Change createChange(IProgressMonitor pm) throws CoreException {

		if (pm != null && pm.isCanceled()) {
			return null;
		}

		CompositeChange multiChange = null;
		Object dest = getArguments().getDestination();

		if (dest instanceof IPackageFragment) {
			Change[] changes = JSPTypeMoveChange.createChangesFor(fType,
					((IPackageFragment) dest).getElementName());
			if (changes.length > 0) {
				multiChange = new CompositeChange(JSPUIMessages.JSP_changes,
						changes);
			}
		}
		return multiChange;
	}

}