/*******************************************************************************
* Copyright (c) 2013 IBM Corporation.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package com.ibm.wala.ide.util;
import static com.ibm.wala.ide.util.JdtUtil.getAST;
import static com.ibm.wala.ide.util.JdtUtil.getOriginalNode;
import java.lang.ref.SoftReference;
import java.util.Map;
import org.eclipse.core.resources.IFile;
import org.eclipse.jdt.core.dom.ASTNode;
import com.ibm.wala.util.collections.HashMapFactory;
public class ASTNodeFinder {
private final Map<IFile, SoftReference<ASTNode>> fileASTs = HashMapFactory.make();
public ASTNode getASTNode(JdtPosition pos) {
IFile sourceFile = pos.getEclipseFile();
if (!fileASTs.containsKey(sourceFile) || fileASTs.get(sourceFile).get() == null) {
fileASTs.put(sourceFile, new SoftReference<ASTNode>(getAST(sourceFile)));
}
return getOriginalNode(fileASTs.get(sourceFile).get(), pos);
}
}