InstVarAccessesFinder.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.renamefield;

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

import org.jruby.ast.CallNode;
import org.jruby.ast.Node;
import org.rubypeople.rdt.refactoring.core.SelectionNodeProvider;
import org.rubypeople.rdt.refactoring.core.renamefield.fielditems.FieldCallItem;
import org.rubypeople.rdt.refactoring.core.renamefield.fielditems.FieldItem;
import org.rubypeople.rdt.refactoring.documentprovider.IDocumentProvider;
import org.rubypeople.rdt.refactoring.exception.NoClassNodeException;

public class InstVarAccessesFinder {

	public static Collection<FieldItem> find(IDocumentProvider document, String selectedName) {
		ArrayList<FieldItem> fieldCallNodes = new ArrayList<FieldItem>();
		
		Collection<Node> allNodes = document.getAllNodes();
		for (Node currentNode : allNodes) {
			if (isPossibleCall(currentNode, document, selectedName)) {
				fieldCallNodes.add(new FieldCallItem((CallNode) currentNode));
			}
		}

		return fieldCallNodes;
	}

	private static boolean isPossibleCall(Node candidateNode, IDocumentProvider document, String selectedName) {
		if ((candidateNode instanceof CallNode)) {

			CallNode callNode = (CallNode) candidateNode;
			if (callNode.getName().replaceAll("=", "").equals(selectedName)) { //$NON-NLS-1$ //$NON-NLS-2$
				String fileName = callNode.getPosition().getFile();
				Node rootNode = document.getRootNode(fileName);
				try {
					SelectionNodeProvider.getSelectedClassNode(rootNode, callNode.getPosition().getStartOffset());
				} catch (NoClassNodeException e) {
					return true;
				}
			}
		}
		return false;
	}
}