| /* |
| * 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 java.util.jar.Manifest; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.Task; |
| |
| /** |
| * Checks whether an extension is present in a fileset or an extensionSet. |
| * |
| * @ant.task name="jarlib-available" |
| */ |
| public class JarLibAvailableTask extends Task { |
| /** |
| * The library to display information about. |
| */ |
| private File libraryFile; |
| |
| /** |
| * Filesets specifying all the librarys |
| * to display information about. |
| */ |
| private final Vector extensionFileSets = new Vector(); |
| |
| /** |
| * The name of the property to set if extension is available. |
| */ |
| private String propertyName; |
| |
| /** |
| * The extension that is required. |
| */ |
| private ExtensionAdapter requiredExtension; |
| |
| /** |
| * The name of property to set if extensions are available. |
| * |
| * @param property The name of property to set if extensions is available. |
| */ |
| public void setProperty(final String property) { |
| this.propertyName = property; |
| } |
| |
| /** |
| * The JAR library to check. |
| * |
| * @param file The jar library to check. |
| */ |
| public void setFile(final File file) { |
| this.libraryFile = file; |
| } |
| |
| /** |
| * Set the Extension looking for. |
| * |
| * @param extension Set the Extension looking for. |
| */ |
| public void addConfiguredExtension(final ExtensionAdapter extension) { |
| if (null != requiredExtension) { |
| final String message = "Can not specify extension to " |
| + "search for multiple times."; |
| throw new BuildException(message); |
| } |
| requiredExtension = extension; |
| } |
| |
| /** |
| * Adds a set of extensions to search in. |
| * |
| * @param extensionSet a set of extensions to search in. |
| */ |
| public void addConfiguredExtensionSet(final ExtensionSet extensionSet) { |
| extensionFileSets.addElement(extensionSet); |
| } |
| |
| /** |
| * Execute the task. |
| * |
| * @throws BuildException if somethign goes wrong. |
| */ |
| public void execute() throws BuildException { |
| validate(); |
| |
| final Extension test = requiredExtension.toExtension(); |
| |
| // Check if list of files to check has been specified |
| if (!extensionFileSets.isEmpty()) { |
| final Iterator iterator = extensionFileSets.iterator(); |
| while (iterator.hasNext()) { |
| final ExtensionSet extensionSet |
| = (ExtensionSet) iterator.next(); |
| final Extension[] extensions = |
| extensionSet.toExtensions(getProject()); |
| for (int i = 0; i < extensions.length; i++) { |
| final Extension extension = extensions[ i ]; |
| if (extension.isCompatibleWith(test)) { |
| getProject().setNewProperty(propertyName, "true"); |
| } |
| } |
| } |
| } else { |
| final Manifest manifest = ExtensionUtil.getManifest(libraryFile); |
| final Extension[] extensions = Extension.getAvailable(manifest); |
| for (int i = 0; i < extensions.length; i++) { |
| final Extension extension = extensions[ i ]; |
| if (extension.isCompatibleWith(test)) { |
| getProject().setNewProperty(propertyName, "true"); |
| } |
| } |
| } |
| } |
| |
| /** |
| * Validate the tasks parameters. |
| * |
| * @throws BuildException if invalid parameters found |
| */ |
| private void validate() throws BuildException { |
| if (null == requiredExtension) { |
| final String message = "Extension element must be specified."; |
| throw new BuildException(message); |
| } |
| |
| if (null == libraryFile && extensionFileSets.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); |
| } |
| } |
| } |