RemovePartOfVisibilityNodeProvider.java

/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2006 Lukas Felber <lfelber@hsr.ch>
 * Copyright (C) 2006 Mirko Stocker <me@misto.ch>
 * Copyright (C) 2006 Thomas Corbat <tcorbat@hsr.ch>
 * 
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 * either of the GNU General Public License Version 2 or later (the "GPL"),
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package org.rubypeople.rdt.refactoring.core.movemethod;

import java.util.ArrayList;
import java.util.Collection;

import org.jruby.ast.Node;
import org.rubypeople.rdt.refactoring.core.NodeFactory;
import org.rubypeople.rdt.refactoring.editprovider.ReplaceEditProvider;
import org.rubypeople.rdt.refactoring.nodewrapper.VisibilityNodeWrapper;
import org.rubypeople.rdt.refactoring.nodewrapper.VisibilityNodeWrapper.METHOD_VISIBILITY;

public class RemovePartOfVisibilityNodeProvider extends ReplaceEditProvider {

	private VisibilityNodeWrapper visibilityNode;

	private Collection<String> methodNamesToDelete;
	private Collection<String> remainingMethodNames;

	public RemovePartOfVisibilityNodeProvider(VisibilityNodeWrapper visibilityNode, Collection<String> methodNamesToDelete) {
		this.visibilityNode = visibilityNode;
		this.methodNamesToDelete = methodNamesToDelete;
		initRemainingNames();
	}

	private void initRemainingNames() {
		remainingMethodNames = new ArrayList<String>(visibilityNode.getMethodNames());
		for(String aktName : methodNamesToDelete) {
			if(remainingMethodNames.contains(aktName)) {
				remainingMethodNames.remove(aktName);
			}
		}
	}

	@Override
	protected int getOffsetLength() {
		return visibilityNode.getPosition().getEndOffset() - visibilityNode.getPosition().getStartOffset();
	}

	@Override
	protected Node getEditNode(int offset, String document) {
		 METHOD_VISIBILITY visibility = visibilityNode.getVisibility();
		return NodeFactory.createVisibilityNode(visibility, remainingMethodNames.toArray(new String[remainingMethodNames.size()]));
	}

	@Override
	protected int getOffset(String document) {
		return visibilityNode.getPosition().getStartOffset();
	}

	public boolean shouldRemoveAll() {
		return remainingMethodNames.isEmpty();
	}

	public boolean hasChange() {
		return remainingMethodNames.size() < visibilityNode.getMethodNames().size();
	}
}