| /* |
| * 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.tools.ant.types.mappers; |
| |
| import java.io.StringReader; |
| import java.io.Reader; |
| |
| import java.util.Vector; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.UnsupportedAttributeException; |
| import org.apache.tools.ant.filters.util.ChainReaderHelper; |
| import org.apache.tools.ant.types.FilterChain; |
| import org.apache.tools.ant.util.FileNameMapper; |
| import org.apache.tools.ant.util.FileUtils; |
| |
| /** |
| * This is a FileNameMapper based on a FilterChain. |
| */ |
| public class FilterMapper extends FilterChain implements FileNameMapper { |
| |
| private static final int BUFFER_SIZE = 8192; |
| |
| /** |
| * From attribute not supported. |
| * @param from a string |
| * @throws BuildException always |
| */ |
| public void setFrom(String from) { |
| throw new UnsupportedAttributeException( |
| "filtermapper doesn't support the \"from\" attribute.", "from"); |
| } |
| |
| /** |
| * From attribute not supported. |
| * @param to a string |
| * @throws BuildException always |
| */ |
| public void setTo(String to) { |
| throw new UnsupportedAttributeException( |
| "filtermapper doesn't support the \"to\" attribute.", "to"); |
| } |
| |
| /** |
| * Return the result of the filters on the sourcefilename. |
| * @param sourceFileName the filename to map |
| * @return a one-element array of converted filenames, or null if |
| * the filterchain returns an empty string. |
| */ |
| public String[] mapFileName(String sourceFileName) { |
| try { |
| Reader stringReader = new StringReader(sourceFileName); |
| ChainReaderHelper helper = new ChainReaderHelper(); |
| helper.setBufferSize(BUFFER_SIZE); |
| helper.setPrimaryReader(stringReader); |
| helper.setProject(getProject()); |
| Vector filterChains = new Vector(); |
| filterChains.add(this); |
| helper.setFilterChains(filterChains); |
| String result = FileUtils.safeReadFully(helper.getAssembledReader()); |
| if (result.length() == 0) { |
| return null; |
| } else { |
| return new String[] {result}; |
| } |
| } catch (BuildException ex) { |
| throw ex; |
| } catch (Exception ex) { |
| throw new BuildException(ex); |
| } |
| } |
| } |