PrincipalClassRenameParticipant.java

/*
 * ====================================================================
 * 
 * The ObjectStyle Group Software License, Version 1.0
 * 
 * Copyright (c) 2005 The ObjectStyle Group and individual authors of the
 * software. All rights reserved.
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 * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
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package org.objectstyle.wolips.refactoring;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
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.RefactoringStatus;
import org.eclipse.ltk.core.refactoring.participants.CheckConditionsContext;
import org.eclipse.ltk.core.refactoring.participants.RenameParticipant;
import org.objectstyle.wolips.core.resources.types.project.ProjectAdapter;

/**
 * Changes the name of a TBLips project's Principal Class when it gets renamed.
 * 
 * @author mschrag
 */
public class PrincipalClassRenameParticipant extends RenameParticipant {
	private ProjectAdapter myProject;
	private Object _element;

	public PrincipalClassRenameParticipant() {
		super();
	}

	protected boolean initialize(Object element) {
		myProject = PrincipalClassMoveParticipant.getInitializedProject(element);
		_element = element;
		boolean initialized = myProject != null;
		return initialized;
	}

	public String getName() {
		return "Rename Principal Class";
	}

	public RefactoringStatus checkConditions(IProgressMonitor _pm, CheckConditionsContext _context) throws OperationCanceledException {
		RefactoringStatus refactoringStatus = new RefactoringStatus();
		return refactoringStatus;
	}

	public Change createChange(IProgressMonitor _pm) throws CoreException, OperationCanceledException {
		Change change = null;
		if (myProject != null) {
			String principalClass = myProject.getBuildProperties().getPrincipalClass(true);
			int nameIndex = principalClass.lastIndexOf('$');
			if (nameIndex == -1) {
				nameIndex = principalClass.lastIndexOf('.');
			}
			if (_element instanceof IType) {
				String newName = principalClass.substring(0, nameIndex + 1) + getArguments().getNewName();
				change = new PrincipalClassChange(myProject, newName);
			}
			else if (_element instanceof IPackageFragment) {
				String newPackageName = getArguments().getNewName();
				String className = principalClass.substring(nameIndex + 1);
				change = new PrincipalClassChange(myProject, newPackageName + "." + className);
			}
		}
		return change;
	}
}