| /* |
| [The "BSD license"] |
| Copyright (c) 2005-2009 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.Token; |
| |
| import java.util.List; |
| |
| public class RewriteRuleTokenStream extends RewriteRuleElementStream { |
| |
| public RewriteRuleTokenStream(TreeAdaptor adaptor, String elementDescription) { |
| super(adaptor, elementDescription); |
| } |
| |
| /** Create a stream with one element */ |
| public RewriteRuleTokenStream(TreeAdaptor adaptor, |
| String elementDescription, |
| Object oneElement) |
| { |
| super(adaptor, elementDescription, oneElement); |
| } |
| |
| /** Create a stream, but feed off an existing list */ |
| public RewriteRuleTokenStream(TreeAdaptor adaptor, |
| String elementDescription, |
| List elements) |
| { |
| super(adaptor, elementDescription, elements); |
| } |
| |
| /** Get next token from stream and make a node for it */ |
| public Object nextNode() { |
| Token t = (Token)_next(); |
| return adaptor.create(t); |
| } |
| |
| public Token nextToken() { |
| return (Token)_next(); |
| } |
| |
| /** Don't convert to a tree unless they explicitly call nextTree. |
| * This way we can do hetero tree nodes in rewrite. |
| */ |
| protected Object toTree(Object el) { |
| return el; |
| } |
| |
| protected Object dup(Object el) { |
| throw new UnsupportedOperationException("dup can't be called for a token stream."); |
| } |
| } |