| /* |
| * 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.taskdefs.optional.extension; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.DirectoryScanner; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.types.FileSet; |
| |
| /** |
| * A set of useful methods relating to extensions. |
| * |
| */ |
| public final class ExtensionUtil { |
| /** |
| * Class is not meant to be instantiated. |
| */ |
| private ExtensionUtil() { |
| //all methods static |
| } |
| |
| /** |
| * Convert a list of extensionAdapter objects to extensions. |
| * |
| * @param adapters the list of ExtensionAdapterss to add to convert |
| * @throws BuildException if an error occurs |
| */ |
| static ArrayList toExtensions(final List adapters) |
| throws BuildException { |
| final ArrayList results = new ArrayList(); |
| |
| final int size = adapters.size(); |
| for (int i = 0; i < size; i++) { |
| final ExtensionAdapter adapter = |
| (ExtensionAdapter) adapters.get(i); |
| final Extension extension = adapter.toExtension(); |
| results.add(extension); |
| } |
| |
| return results; |
| } |
| |
| /** |
| * Generate a list of extensions from a specified fileset. |
| * |
| * @param libraries the list to add extensions to |
| * @param fileset the filesets containing librarys |
| * @throws BuildException if an error occurs |
| */ |
| static void extractExtensions(final Project project, |
| final List libraries, |
| final List fileset) |
| throws BuildException { |
| if (!fileset.isEmpty()) { |
| final Extension[] extensions = getExtensions(project, |
| fileset); |
| for (int i = 0; i < extensions.length; i++) { |
| libraries.add(extensions[ i ]); |
| } |
| } |
| } |
| |
| /** |
| * Retrieve extensions from the specified libraries. |
| * |
| * @param libraries the filesets for libraries |
| * @return the extensions contained in libraries |
| * @throws BuildException if failing to scan libraries |
| */ |
| private static Extension[] getExtensions(final Project project, |
| final List libraries) |
| throws BuildException { |
| final ArrayList extensions = new ArrayList(); |
| final Iterator iterator = libraries.iterator(); |
| while (iterator.hasNext()) { |
| final FileSet fileSet = (FileSet) iterator.next(); |
| |
| boolean includeImpl = true; |
| boolean includeURL = true; |
| |
| if (fileSet instanceof LibFileSet) { |
| LibFileSet libFileSet = (LibFileSet) fileSet; |
| includeImpl = libFileSet.isIncludeImpl(); |
| includeURL = libFileSet.isIncludeURL(); |
| } |
| |
| final DirectoryScanner scanner = fileSet.getDirectoryScanner(project); |
| final File basedir = scanner.getBasedir(); |
| final String[] files = scanner.getIncludedFiles(); |
| for (int i = 0; i < files.length; i++) { |
| final File file = new File(basedir, files[ i ]); |
| loadExtensions(file, extensions, includeImpl, includeURL); |
| } |
| } |
| return (Extension[]) extensions.toArray(new Extension[extensions.size()]); |
| } |
| |
| /** |
| * Load list of available extensions from specified file. |
| * |
| * @param file the file |
| * @param extensionList the list to add available extensions to |
| * @throws BuildException if there is an error |
| */ |
| private static void loadExtensions(final File file, |
| final List extensionList, |
| final boolean includeImpl, |
| final boolean includeURL) |
| throws BuildException { |
| try { |
| final JarFile jarFile = new JarFile(file); |
| final Extension[] extensions = |
| Extension.getAvailable(jarFile.getManifest()); |
| for (int i = 0; i < extensions.length; i++) { |
| final Extension extension = extensions[ i ]; |
| addExtension(extensionList, extension, includeImpl, includeURL); |
| } |
| } catch (final Exception e) { |
| throw new BuildException(e.getMessage(), e); |
| } |
| } |
| |
| /** |
| * Add extension to list. |
| * If extension should not have implementation details but |
| * does strip them. If extension should not have url but does |
| * then strip it. |
| * |
| * @param extensionList the list of extensions to add to |
| * @param originalExtension the extension |
| * @param includeImpl false to exclude implementation details |
| * @param includeURL false to exclude implementation URL |
| */ |
| private static void addExtension(final List extensionList, |
| final Extension originalExtension, |
| final boolean includeImpl, |
| final boolean includeURL) { |
| Extension extension = originalExtension; |
| if (!includeURL |
| && null != extension.getImplementationURL()) { |
| extension = |
| new Extension(extension.getExtensionName(), |
| extension.getSpecificationVersion().toString(), |
| extension.getSpecificationVendor(), |
| extension.getImplementationVersion().toString(), |
| extension.getImplementationVendor(), |
| extension.getImplementationVendorID(), |
| null); |
| } |
| |
| final boolean hasImplAttributes = |
| null != extension.getImplementationURL() |
| || null != extension.getImplementationVersion() |
| || null != extension.getImplementationVendorID() |
| || null != extension.getImplementationVendor(); |
| |
| if (!includeImpl && hasImplAttributes) { |
| extension = |
| new Extension(extension.getExtensionName(), |
| extension.getSpecificationVersion().toString(), |
| extension.getSpecificationVendor(), |
| null, |
| null, |
| null, |
| extension.getImplementationURL()); |
| } |
| |
| extensionList.add(extension); |
| } |
| |
| /** |
| * Retrieve manifest for specified file. |
| * |
| * @param file the file |
| * @return the manifest |
| * @throws BuildException if errror occurs (file doesn't exist, |
| * file not a jar, manifest doesn't exist in file) |
| */ |
| static Manifest getManifest(final File file) |
| throws BuildException { |
| try { |
| final JarFile jarFile = new JarFile(file); |
| Manifest m = jarFile.getManifest(); |
| if (m == null) { |
| throw new BuildException(file + " doesn't have a MANIFEST"); |
| } |
| return m; |
| } catch (final IOException ioe) { |
| throw new BuildException(ioe.getMessage(), ioe); |
| } |
| } |
| } |