001 /*
002 * Copyright 2005-2008 Sun Microsystems, Inc. All Rights Reserved.
003 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004 *
005 * This code is free software; you can redistribute it and/or modify it
006 * under the terms of the GNU General Public License version 2 only, as
007 * published by the Free Software Foundation. Sun designates this
008 * particular file as subject to the "Classpath" exception as provided
009 * by Sun in the LICENSE file that accompanied this code.
010 *
011 * This code is distributed in the hope that it will be useful, but WITHOUT
012 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
014 * version 2 for more details (a copy is included in the LICENSE file that
015 * accompanied this code).
016 *
017 * You should have received a copy of the GNU General Public License version
018 * 2 along with this work; if not, write to the Free Software Foundation,
019 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020 *
021 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022 * CA 95054 USA or visit www.sun.com if you need additional information or
023 * have any questions.
024 */
025
026 package com.sun.tools.javac.parser;
027
028 import java.util.Map;
029 import java.util.HashMap;
030 import com.sun.tools.javac.tree.JCTree;
031 import com.sun.tools.javac.tree.TreeInfo;
032
033 import static com.sun.tools.javac.tree.JCTree.*;
034
035 /**
036 * This class is similar to Parser except that it stores ending
037 * positions for the tree nodes.
038 *
039 * <p><b>This is NOT part of any API supported by Sun Microsystems.
040 * If you write code that depends on this, you do so at your own risk.
041 * This code and its internal interfaces are subject to change or
042 * deletion without notice.</b></p>
043 */
044 public class EndPosParser extends JavacParser {
045
046 public EndPosParser(ParserFactory fac, Lexer S, boolean keepDocComments, boolean keepLineMap) {
047 super(fac, S, keepDocComments, keepLineMap);
048 this.S = S;
049 endPositions = new HashMap<JCTree,Integer>();
050 }
051
052 private Lexer S;
053
054 /** A hashtable to store ending positions
055 * of source ranges indexed by the tree nodes.
056 * Defined only if option flag genEndPos is set.
057 */
058 Map<JCTree, Integer> endPositions;
059
060 /** {@inheritDoc} */
061 @Override
062 protected void storeEnd(JCTree tree, int endpos) {
063 int errorEndPos = getErrorEndPos();
064 endPositions.put(tree, errorEndPos > endpos ? errorEndPos : endpos);
065 }
066
067 /** {@inheritDoc} */
068 @Override
069 protected <T extends JCTree> T to(T t) {
070 storeEnd(t, S.endPos());
071 return t;
072 }
073
074 /** {@inheritDoc} */
075 @Override
076 protected <T extends JCTree> T toP(T t) {
077 storeEnd(t, S.prevEndPos());
078 return t;
079 }
080
081 @Override
082 public JCCompilationUnit parseCompilationUnit() {
083 JCCompilationUnit t = super.parseCompilationUnit();
084 t.endPositions = endPositions;
085 return t;
086 }
087
088 /** {@inheritDoc} */
089 @Override
090 JCExpression parExpression() {
091 int pos = S.pos();
092 JCExpression t = super.parExpression();
093 return toP(F.at(pos).Parens(t));
094 }
095
096 /** {@inheritDoc} */
097 @Override
098 public int getEndPos(JCTree tree) {
099 return TreeInfo.getEndPos(tree, endPositions);
100 }
101
102 }