| /* |
| * 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.compression; |
| |
| import org.apache.myfaces.buildtools.maven2.plugin.javascript.obfuscator.filters.ObfuscatorFilter; |
| import org.apache.myfaces.buildtools.maven2.plugin.javascript.obfuscator.javascript15parser.AnnotatedToken; |
| |
| import java.util.Iterator; |
| import java.util.Vector; |
| |
| |
| public class CompressionFilter implements ObfuscatorFilter |
| { |
| private boolean _stripComments; |
| private boolean _stripWhitespaces; |
| private boolean _stripNewlines; |
| private Vector _handlers = new Vector(); |
| |
| public CompressionFilter(boolean stripComments, boolean stripWhitespaces, |
| boolean stripNewlines) |
| { |
| _stripComments = stripComments; |
| _stripWhitespaces = stripWhitespaces; |
| _stripNewlines = stripNewlines; |
| |
| // create a set of handlers based on supplied options |
| init(); |
| } |
| |
| public AnnotatedToken filter(AnnotatedToken startToken) |
| { |
| AnnotatedToken token = startToken; |
| AnnotatedToken prevToken = null; |
| |
| while (token != null) |
| { |
| // hand off to handlers |
| // todo: inline these if this is too expensive |
| for (Iterator itr = _handlers.iterator(); itr.hasNext();) |
| { |
| CompressionHandler handler = (CompressionHandler) itr.next(); |
| handler.handle(token, prevToken); |
| } |
| |
| prevToken = token; |
| token = token.getNext(); |
| } |
| |
| return startToken; |
| } |
| |
| private void init() |
| { |
| if (_stripComments) |
| { |
| _handlers.add(new CommentsHandler()); |
| } |
| |
| if (_stripWhitespaces) |
| { |
| _handlers.add(new WhitespaceHandler()); |
| } |
| |
| if (_stripNewlines) |
| { |
| _handlers.add(new NewlineHandler()); |
| } |
| } |
| } |