Java tutorial
package org.apache.maven.plugin.assembly.format; /* * 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. */ import org.apache.commons.io.input.ReaderInputStream; import org.apache.maven.plugin.assembly.AssemblerConfigurationSource; import org.apache.maven.plugin.assembly.utils.AssemblyFileUtils; import org.apache.maven.plugin.assembly.utils.LineEndings; import org.apache.maven.plugin.assembly.utils.LineEndingsUtils; import org.apache.maven.shared.filtering.MavenFilteringException; import org.apache.maven.shared.filtering.MavenReaderFilterRequest; import org.codehaus.plexus.components.io.functions.InputStreamTransformer; import org.codehaus.plexus.components.io.resources.PlexusIoResource; import javax.annotation.Nonnull; import javax.annotation.Nullable; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.Reader; import java.util.LinkedHashSet; import java.util.List; /** * */ public class ReaderFormatter { private static Reader createReaderFilter(@Nonnull Reader source, String escapeString, List<String> delimiters, AssemblerConfigurationSource configSource, boolean isPropertiesFile) throws IOException { try { MavenReaderFilterRequest filterRequest = new MavenReaderFilterRequest(source, true, configSource.getProject(), configSource.getFilters(), isPropertiesFile, null, configSource.getMavenSession(), null); // filterRequest.setInjectProjectBuildFilters(true); filterRequest.setEscapeString(escapeString); // if these are NOT set, just use the defaults, which are '${*}' and '@'. if (delimiters != null && !delimiters.isEmpty()) { LinkedHashSet<String> delims = new LinkedHashSet<String>(); for (String delim : delimiters) { if (delim == null) { // FIXME: ${filter:*} could also trigger this condition. Need a better long-term solution. delims.add("${*}"); } else { delims.add(delim); } } filterRequest.setDelimiters(delims); } else { filterRequest.setDelimiters(filterRequest.getDelimiters()); } filterRequest.setInjectProjectBuildFilters(configSource.isIncludeProjectBuildFilters()); return configSource.getMavenReaderFilter().filter(filterRequest); } catch (MavenFilteringException e) { IOException ioe = new IOException("Error filtering file '" + source + "': " + e.getMessage()); ioe.initCause(e); // plain old Java 5... throw ioe; } } private static boolean isForbiddenFiletypes(PlexusIoResource plexusIoResource) throws IOException { String fileName = plexusIoResource.getName().toLowerCase(); return (fileName.endsWith(".zip") || fileName.endsWith(".jar")); } private static void checkifFileTypeIsAppropriateForLineEndingTransformation(PlexusIoResource plexusIoResource) throws IOException { if (isForbiddenFiletypes(plexusIoResource)) { throw new IOException("Cannot transform line endings on this kind of file: " + plexusIoResource.getName() + "\nDoing so is more or less guaranteed to destroy the file, and it indicates" + " a problem with your assembly descriptor." + "\nThis error message is new as of 2.5.3. " + "\nEarlier versions of assembly-plugin will silently destroy your file. " + "Fix your descriptor"); } } @Nullable public static InputStreamTransformer getFileSetTransformers(final AssemblerConfigurationSource configSource, final boolean isFiltered, String fileSetLineEnding) throws AssemblyFormattingException { final LineEndings lineEndingToUse = LineEndingsUtils.getLineEnding(fileSetLineEnding); final boolean transformLineEndings = !LineEndings.keep.equals(lineEndingToUse); if (transformLineEndings || isFiltered) { return new InputStreamTransformer() { public InputStream transform(PlexusIoResource plexusIoResource, InputStream inputStream) throws IOException { InputStream result = inputStream; if (isFiltered) { boolean isPropertyFile = AssemblyFileUtils.isPropertyFile(plexusIoResource.getName()); final String encoding = isPropertyFile ? "ISO-8859-1" : configSource.getEncoding(); Reader source = encoding != null ? new InputStreamReader(inputStream, encoding) : new InputStreamReader(inputStream); // wtf platform encoding ? TODO: Fix this Reader filtered = createReaderFilter(source, configSource.getEscapeString(), configSource.getDelimiters(), configSource, isPropertyFile); result = encoding != null ? new ReaderInputStream(filtered, encoding) : new ReaderInputStream(filtered); } if (transformLineEndings) { checkifFileTypeIsAppropriateForLineEndingTransformation(plexusIoResource); result = LineEndingsUtils.lineEndingConverter(result, lineEndingToUse); } return result; } }; } return null; } }