/runtime/Java/src/main/java/org/antlr/runtime/tree/RewriteRuleNodeStream.java
Java | 72 lines | 30 code | 8 blank | 34 comment | 0 complexity | c3bc32912348c170627a62c0dde96ea9 MD5 | raw file
- /*
- [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 java.util.List;
- /** Queues up nodes matched on left side of -> in a tree parser. This is
- * the analog of RewriteRuleTokenStream for normal parsers.
- */
- public class RewriteRuleNodeStream extends RewriteRuleElementStream {
- public RewriteRuleNodeStream(TreeAdaptor adaptor, String elementDescription) {
- super(adaptor, elementDescription);
- }
- /** Create a stream with one element */
- public RewriteRuleNodeStream(TreeAdaptor adaptor,
- String elementDescription,
- Object oneElement)
- {
- super(adaptor, elementDescription, oneElement);
- }
- /** Create a stream, but feed off an existing list */
- public RewriteRuleNodeStream(TreeAdaptor adaptor,
- String elementDescription,
- List<Object> elements)
- {
- super(adaptor, elementDescription, elements);
- }
- public Object nextNode() {
- return _next();
- }
- @Override
- protected Object toTree(Object el) {
- return adaptor.dupNode(el);
- }
- @Override
- protected Object dup(Object el) {
- // we dup every node, so don't have to worry about calling dup; short-
- // circuited next() so it doesn't call.
- throw new UnsupportedOperationException("dup can't be called for a node stream.");
- }
- }