midletmoveparticipant.java

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/**
 * Copyright (c) 2003-2005 Craig Setera
 * All Rights Reserved.
 * Licensed under the Eclipse Public License - v 1.0
 * For more information see http://www.eclipse.org/legal/epl-v10.html
 */
package eclipseme.core.internal.refactoring;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IType;
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;

/**
 * EclipseME participant in type move refactoring operations
 * <p />
 * Copyright (c) 2003-2005 Craig Setera<br>
 * All Rights Reserved.<br>
 * Licensed under the Eclipse Public License - v 1.0<p/>
 * <br>
 * $Revision: 1.1 $
 * <br>
 * $Date: 2005/12/18 19:36:58 $
 * <br>
 * @author Craig Setera
 */
public class MidletMoveParticipant extends MoveParticipant {
	private IType type;
	
	/**
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#initialize(java.lang.Object)
	 */
	protected boolean initialize(Object element) {
		type = (IType) element;
		return getArguments().getUpdateReferences();
	}

	/**
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#getName()
	 */
	public String getName() {
		return "Update Application Descriptors";
	}

	/**
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#checkConditions(org.eclipse.core.runtime.IProgressMonitor, org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext)
	 */
	public RefactoringStatus checkConditions(
		IProgressMonitor pm,
		CheckConditionsContext context) 
			throws OperationCanceledException 
	{
		return new RefactoringStatus();
	}

	/**
	 * @see org.eclipse.ltk.core.refactoring.participants.RefactoringParticipant#createChange(org.eclipse.core.runtime.IProgressMonitor)
	 */
	public Change createChange(IProgressMonitor pm) 
		throws CoreException, OperationCanceledException 
	{
		SubProgressMonitor subMonitor = new SubProgressMonitor(pm, 5);
		subMonitor.setTaskName("Creating Application Descriptor Changes");

		String newName = getNewName();
		CompositeChange compositeChange = MidletJadFileChangesCollector.collectChange(
			MidletJadFileChangesCollector.MODE_RENAME, 
			type, 
			newName, 
			subMonitor);
		
		subMonitor.done();
		return (compositeChange.getChildren().length > 0) ? compositeChange : null;
	}
	
	/**
	 * Return the new name to be used for the updates.
	 * @return
	 */
	private String getNewName() {
		StringBuffer sb = new StringBuffer();
		
		IPackageFragment packageFragment = (IPackageFragment) getArguments().getDestination();
		String packageName = packageFragment.getElementName();
		if ((packageName != null) && (packageName.length() > 0)) {
			sb.append(packageName).append(".");
		}
		
		sb.append(type.getElementName());
		
		return sb.toString();
	}
}