| /* |
| * 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.util.Iterator; |
| import java.util.Vector; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.DirectoryScanner; |
| import org.apache.tools.ant.Task; |
| import org.apache.tools.ant.types.FileSet; |
| |
| /** |
| * Displays the "Optional Package" and "Package Specification" information |
| * contained within the specified JARs. |
| * |
| * <p>Prior to JDK1.3, an "Optional Package" was known as an Extension. |
| * The specification for this mechanism is available in the JDK1.3 |
| * documentation in the directory |
| * $JDK_HOME/docs/guide/extensions/versioning.html. Alternatively it is |
| * available online at <a href="http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html"> |
| * http://java.sun.com/j2se/1.3/docs/guide/extensions/versioning.html</a>.</p> |
| * |
| * @ant.task name="jarlib-display" |
| */ |
| public class JarLibDisplayTask extends Task { |
| /** |
| * The library to display information about. |
| */ |
| private File libraryFile; |
| |
| /** |
| * Filesets specifying all the librarys |
| * to display information about. |
| */ |
| private final Vector libraryFileSets = new Vector(); |
| |
| /** |
| * The JAR library to display information for. |
| * |
| * @param file The jar library to display information for. |
| */ |
| public void setFile(final File file) { |
| this.libraryFile = file; |
| } |
| |
| /** |
| * Adds a set of files about which library data will be displayed. |
| * |
| * @param fileSet a set of files about which library data will be displayed. |
| */ |
| public void addFileset(final FileSet fileSet) { |
| libraryFileSets.addElement(fileSet); |
| } |
| |
| /** |
| * Execute the task. |
| * |
| * @throws BuildException if the task fails. |
| */ |
| public void execute() throws BuildException { |
| validate(); |
| |
| final LibraryDisplayer displayer = new LibraryDisplayer(); |
| // Check if list of files to check has been specified |
| if (!libraryFileSets.isEmpty()) { |
| final Iterator iterator = libraryFileSets.iterator(); |
| while (iterator.hasNext()) { |
| final FileSet fileSet = (FileSet) iterator.next(); |
| final DirectoryScanner scanner |
| = fileSet.getDirectoryScanner(getProject()); |
| 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 ]); |
| displayer.displayLibrary(file); |
| } |
| } |
| } else { |
| displayer.displayLibrary(libraryFile); |
| } |
| } |
| |
| /** |
| * Validate the tasks parameters. |
| * |
| * @throws BuildException if invalid parameters found |
| */ |
| private void validate() throws BuildException { |
| if (null == libraryFile && libraryFileSets.isEmpty()) { |
| final String message = "File attribute not specified."; |
| throw new BuildException(message); |
| } |
| if (null != libraryFile && !libraryFile.exists()) { |
| final String message = "File '" + libraryFile + "' does not exist."; |
| throw new BuildException(message); |
| } |
| if (null != libraryFile && !libraryFile.isFile()) { |
| final String message = "\'" + libraryFile + "\' is not a file."; |
| throw new BuildException(message); |
| } |
| } |
| } |