| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.myfaces.buildtools.maven2.plugin.javascript.obfuscator.filters.keywords; |
| |
| import org.apache.myfaces.buildtools.maven2.plugin.javascript.obfuscator.filters.ObfuscatorFilter; |
| import org.apache.myfaces.buildtools.maven2.plugin.javascript.obfuscator.javascript15parser.AnnotatedToken; |
| |
| |
| public class SpecialKeywordsFilter implements ObfuscatorFilter |
| { |
| public SpecialKeywordsFilter() |
| { |
| } |
| |
| public AnnotatedToken filter(AnnotatedToken startToken) |
| { |
| AnnotatedToken token = startToken; |
| token = removeSpecialTypes(token); |
| |
| return token; |
| } |
| |
| protected void removeSpecialTokens(AnnotatedToken token) |
| { |
| AnnotatedToken specialToken = token.getSpecialToken(); |
| AnnotatedToken prevSpecialToken = token; |
| |
| while (specialToken != null) |
| { |
| if (specialToken.isRemovableKeyword()) |
| { |
| prevSpecialToken.specialToken = specialToken.specialToken; |
| specialToken = specialToken.getSpecialToken(); |
| } |
| else |
| { |
| prevSpecialToken = specialToken; |
| specialToken = specialToken.getSpecialToken(); |
| } |
| } |
| } |
| |
| /** |
| * The main loop removes special types (like Profiler, and CheckPoint) and |
| * all method invocations using variables of these types. The main |
| * loop calls removeSpecialTokens which removes special keywords like Assert |
| * and Logger, which were tagged by the parser as SpecialTokens |
| * @param startToken |
| * @return |
| */ |
| protected AnnotatedToken removeSpecialTypes(AnnotatedToken startToken) |
| { |
| AnnotatedToken token = startToken; |
| AnnotatedToken prevToken = null; |
| AnnotatedToken newStartToken = null; |
| |
| while (token != null) |
| { |
| if (token.canRemove()) |
| { |
| if (prevToken != null) |
| { |
| prevToken.next = token.getNext(); |
| } |
| |
| token = token.getNext(); |
| } |
| else |
| { |
| removeSpecialTokens(token); |
| |
| if (newStartToken == null) |
| { |
| newStartToken = token; |
| } |
| |
| prevToken = token; |
| token = token.getNext(); |
| } |
| } |
| |
| return newStartToken; |
| } |
| } |