/Users/parrt/antlr/code/antlr/main/runtime/Java/src/org/antlr/runtime/tree/CommonTreeAdaptor.java

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/*
 [The "BSD licence"]
 Copyright (c) 2005-2008 Terence Parr
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 3. The name of the author may not be used to endorse or promote products
    derived from this software without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.antlr.runtime.tree;

import org.antlr.runtime.CommonToken;
import org.antlr.runtime.Token;

public class CommonTreeAdaptor extends BaseTreeAdaptor {
        public Object dupNode(Object t) {
                if ( t==null ) {
                        return null;
                }
                return ((Tree)t).dupNode();
        }

        public Object create(Token payload) {
                return new CommonTree(payload);
        }

        public Token createToken(int tokenType, String text) {
                return new CommonToken(tokenType, text);
        }

        public Token createToken(Token fromToken) {
                return new CommonToken(fromToken);
        }

        public void setTokenBoundaries(Object t, Token startToken, Token stopToken) {
                if ( t==null ) {
                        return;
                }
                int start = 0;
                int stop = 0;
                if ( startToken!=null ) {
                        start = startToken.getTokenIndex();
                }
                if ( stopToken!=null ) {
                        stop = stopToken.getTokenIndex();
                }
                ((Tree)t).setTokenStartIndex(start);
                ((Tree)t).setTokenStopIndex(stop);
        }

        public int getTokenStartIndex(Object t) {
                if ( t==null ) {
                        return -1;
                }
                return ((Tree)t).getTokenStartIndex();
        }

        public int getTokenStopIndex(Object t) {
                if ( t==null ) {
                        return -1;
                }
                return ((Tree)t).getTokenStopIndex();
        }

        public String getText(Object t) {
                if ( t==null ) {
                        return null;
                }
                return ((Tree)t).getText();
        }

    public int getType(Object t) {
                if ( t==null ) {
                        return Token.INVALID_TOKEN_TYPE;
                }
                return ((Tree)t).getType();
        }

        public Token getToken(Object t) {
                if ( t instanceof CommonTree ) {
                        return ((CommonTree)t).getToken();
                }
                return null; // no idea what to do
        }

        public Object getChild(Object t, int i) {
                if ( t==null ) {
                        return null;
                }
        return ((Tree)t).getChild(i);
    }

    public int getChildCount(Object t) {
                if ( t==null ) {
                        return 0;
                }
        return ((Tree)t).getChildCount();
    }

        public Object getParent(Object t) {
                return ((Tree)t).getParent();
        }

        public void setParent(Object t, Object parent) {
                ((Tree)t).setParent((Tree)parent);
        }

        public int getChildIndex(Object t) {
                return ((Tree)t).getChildIndex();
        }

        public void setChildIndex(Object t, int index) {
                ((Tree)t).setChildIndex(index);
        }

        public void replaceChildren(Object parent, int startChildIndex, int stopChildIndex, Object t) {
                if ( parent!=null ) {
                        ((Tree)parent).replaceChildren(startChildIndex, stopChildIndex, t);
                }
        }
}

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