/*

 * Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package com.sun.tools.javac.parser;

import java.util.Map;

import java.util.HashMap;

import com.sun.tools.javac.tree.JCTree;

import com.sun.tools.javac.tree.TreeInfo;

import static com.sun.tools.javac.tree.JCTree.*;

/**

 * This class is similar to Parser except that it stores ending

 * positions for the tree nodes.

 *

 * If you write code that depends on this, you do so at your own risk.

 * This code and its internal interfaces are subject to change or

 * deletion without notice.</b></p>

 */

public class EndPosParser extends JavacParser {

    public EndPosParser(ParserFactory fac, Lexer S, boolean keepDocComments, boolean keepLineMap) {

        super(fac, S, keepDocComments, keepLineMap);

        this.S = S;

        endPositions = new HashMap<JCTree,Integer>();

    }

    private Lexer S;

    /** A hashtable to store ending positions

     *  of source ranges indexed by the tree nodes.

     *  Defined only if option flag genEndPos is set.

     */

    Map<JCTree, Integer> endPositions;

    /** {@inheritDoc} */

    @Override

    protected void storeEnd(JCTree tree, int endpos) {

        int errorEndPos = getErrorEndPos();

        endPositions.put(tree, errorEndPos > endpos ? errorEndPos : endpos);

    }

    /** {@inheritDoc} */

    @Override

    protected <T extends JCTree> T to(T t) {

        storeEnd(t, S.endPos());

        return t;

    }

    /** {@inheritDoc} */

    @Override

    protected <T extends JCTree> T toP(T t) {

        storeEnd(t, S.prevEndPos());

        return t;

    }

    @Override

    public JCCompilationUnit parseCompilationUnit() {

        JCCompilationUnit t = super.parseCompilationUnit();

        t.endPositions = endPositions;

        return t;

    }

    /** {@inheritDoc} */

    @Override

    JCExpression parExpression() {

        int pos = S.pos();

        JCExpression t = super.parExpression();

        return toP(F.at(pos).Parens(t));

    }

    /** {@inheritDoc} */

    @Override

    public int getEndPos(JCTree tree) {

        return TreeInfo.getEndPos(tree, endPositions);

    }

}