PrincipalClassChange.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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 * Redistribution and use in source and binary forms, with or without
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 * 1. Redistributions of source code must retain the above copyright notice,
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 * 2. Redistributions in binary form must reproduce the above copyright notice,
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 * 3. The end-user documentation included with the redistribution, if any, must
 * include the following acknowlegement: "This product includes software
 * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately,
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package org.objectstyle.wolips.refactoring;

import java.io.IOException;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.ltk.core.refactoring.Change;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.objectstyle.wolips.core.resources.types.project.ProjectAdapter;
import org.objectstyle.wolips.variables.BuildProperties;

/**
 * @author mike
 */
public class PrincipalClassChange extends Change {
	private ProjectAdapter _projectAdapter;

	private BuildProperties _buildProperties;

	private String _newName;

	public PrincipalClassChange(ProjectAdapter projectAdapter, String newName) {
		_projectAdapter = projectAdapter;
		_buildProperties = projectAdapter.getBuildProperties();
		_newName = newName;
	}

	public String getName() {
		return "Change Principal Class from " + _buildProperties.getPrincipalClass(true) + " to " + _newName;
	}

	public void initializeValidationData(IProgressMonitor _pm) {
		//do nothing
	}

	public RefactoringStatus isValid(IProgressMonitor _pm) throws CoreException, OperationCanceledException {
		RefactoringStatus status = new RefactoringStatus();
		return status;
	}

	public Change perform(IProgressMonitor _pm) throws CoreException {
		String oldName = _buildProperties.getPrincipalClass(true);
		_buildProperties.setPrincipalClass(_newName);
		try {
			_buildProperties.save();
		} catch (IOException e) {
			throw new RuntimeException("Failed to save build properties.", e);
		}
		PrincipalClassChange undoChange = new PrincipalClassChange(_projectAdapter, oldName);
		return undoChange;
	}

	public Object getModifiedElement() {
		return _buildProperties;
	}

}