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/* |
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* Licensed to the Apache Software Foundation (ASF) under one or more |
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* contributor license agreements. See the NOTICE file distributed with |
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* this work for additional information regarding copyright ownership. |
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* The ASF licenses this file to You under the Apache License, Version 2.0 |
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* (the "License"); you may not use this file except in compliance with |
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* the License. You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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package org.apache.tools.ant.types.mappers; |
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import java.io.File; |
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import org.apache.tools.ant.BuildException; |
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import org.apache.tools.ant.util.FileNameMapper; |
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/** |
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* A mapper that strips of the a configurable number of leading |
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* directories from a file name. |
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* |
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* <p>This mapper was inspired by a user-list thread that mentioned |
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* wget's --cut-dirs option.</p> |
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* |
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* @see http://mail-archives.apache.org/mod_mbox/ant-user/201009.mbox/%3C51772743BEA5D44A9EA5BF52AADDD6FB010E96F6@hammai008.delphi.local%3E |
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*/ |
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public class CutDirsMapper implements FileNameMapper { |
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private int dirs = 0; |
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/** |
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* The number of leading directories to cut. |
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*/ |
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public void setDirs(int dirs) { |
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this.dirs = dirs; |
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} |
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/** |
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* Empty implementation. |
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* @param ignore ignored. |
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*/ |
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public void setFrom(String ignore) { |
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} |
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/** |
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* Empty implementation. |
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* @param ignore ignored. |
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*/ |
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public void setTo(String ignore) { |
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} |
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/** {@inheritDoc}. */ |
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public String[] mapFileName(final String sourceFileName) { |
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if (dirs <= 0) { |
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throw new BuildException("dirs must be set to a positive number"); |
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} |
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char fileSep = File.separatorChar; |
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String fileSepCorrected = |
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sourceFileName.replace('/', fileSep).replace('\\', fileSep); |
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int nthMatch = fileSepCorrected.indexOf(fileSep); |
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for (int n = 1; nthMatch > -1 && n < dirs; n++) { |
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nthMatch = fileSepCorrected.indexOf(fileSep, nthMatch + 1); |
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} |
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if (nthMatch == -1) { |
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return null; |
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} |
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return new String[] { sourceFileName.substring(nthMatch + 1) }; |
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} |
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} |
Stefan Bodewig