52 lines
1.6 KiB
Java
52 lines
1.6 KiB
Java
/*******************************************************************************
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* Copyright (c) 2011 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.cast.js.ipa.callgraph.correlations.extraction;
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import com.ibm.wala.cast.tree.CAstNode;
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import com.ibm.wala.cast.tree.rewrite.CAstBasicRewriter;
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import com.ibm.wala.cast.tree.rewrite.CAstBasicRewriter.NoKey;
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import com.ibm.wala.cast.tree.rewrite.CAstRewriter;
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/**
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* Representation of a node's position in a CAst entity's syntax tree. The position is stored as a zipper
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* data structure.
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*
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* @author mschaefer
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*
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*/
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public abstract class NodePos implements CAstRewriter.RewriteContext<CAstBasicRewriter.NoKey> {
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public abstract <A> A accept(PosSwitch<A> ps);
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@Override
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public NoKey key() {
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return null;
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}
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/**
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* Determines whether a node is inside the subtree rooted at some other node.
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*
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* @param node the node
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* @param tree the subtree
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* @return {@literal true} if {@code node} is a descendant of {@code tree}, {@literal false} otherwise
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*/
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public static boolean inSubtree(CAstNode node, CAstNode tree) {
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if(node == tree)
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return true;
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if(tree == null)
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return false;
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for(int i=0;i<tree.getChildCount();++i)
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if(inSubtree(node, tree.getChild(i)))
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return true;
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return false;
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}
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}
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