| /* |
| * 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; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.apache.tools.ant.TaskContainer; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.ComponentHelper; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.Task; |
| import org.apache.tools.ant.helper.ProjectHelper2; |
| import org.apache.tools.ant.UnknownElement; |
| |
| |
| /** |
| * Antlib task. It does not |
| * occur in an ant build file. It is the root element |
| * an antlib xml file. |
| * |
| * @since Ant 1.6 |
| */ |
| public class Antlib extends Task implements TaskContainer { |
| // |
| // Static |
| // |
| |
| /** The name of this task */ |
| public static final String TAG = "antlib"; |
| |
| /** |
| * Static method to read an ant lib definition from |
| * a url. |
| * |
| * @param project the current project |
| * @param antlibUrl the url to read the definitions from |
| * @param uri the uri that the antlib is to be placed in |
| * @return the ant lib task |
| */ |
| public static Antlib createAntlib(Project project, URL antlibUrl, |
| String uri) { |
| // Check if we can contact the URL |
| try { |
| antlibUrl.openConnection().connect(); |
| } catch (IOException ex) { |
| throw new BuildException( |
| "Unable to find " + antlibUrl, ex); |
| } |
| ComponentHelper helper = |
| ComponentHelper.getComponentHelper(project); |
| helper.enterAntLib(uri); |
| try { |
| // Should be safe to parse |
| ProjectHelper2 parser = new ProjectHelper2(); |
| UnknownElement ue = |
| parser.parseUnknownElement(project, antlibUrl); |
| // Check name is "antlib" |
| if (!(ue.getTag().equals(TAG))) { |
| throw new BuildException( |
| "Unexpected tag " + ue.getTag() + " expecting " |
| + TAG, ue.getLocation()); |
| } |
| Antlib antlib = new Antlib(); |
| antlib.setProject(project); |
| antlib.setLocation(ue.getLocation()); |
| antlib.setTaskName("antlib"); |
| antlib.init(); |
| ue.configure(antlib); |
| return antlib; |
| } finally { |
| helper.exitAntLib(); |
| } |
| } |
| |
| |
| // |
| // Instance |
| // |
| private ClassLoader classLoader; |
| private String uri = ""; |
| private List tasks = new ArrayList(); |
| |
| /** |
| * Set the class loader for this antlib. |
| * This class loader is used for any tasks that |
| * derive from Definer. |
| * |
| * @param classLoader the class loader |
| */ |
| protected void setClassLoader(ClassLoader classLoader) { |
| this.classLoader = classLoader; |
| } |
| |
| /** |
| * Set the URI for this antlib. |
| * @param uri the namespace uri |
| */ |
| protected void setURI(String uri) { |
| this.uri = uri; |
| } |
| |
| private ClassLoader getClassLoader() { |
| if (classLoader == null) { |
| classLoader = Antlib.class.getClassLoader(); |
| } |
| return classLoader; |
| } |
| |
| /** |
| * add a task to the list of tasks |
| * |
| * @param nestedTask Nested task to execute in antlib |
| */ |
| public void addTask(Task nestedTask) { |
| tasks.add(nestedTask); |
| } |
| |
| /** |
| * Execute the nested tasks, setting the classloader for |
| * any tasks that derive from Definer. |
| */ |
| public void execute() { |
| for (Iterator i = tasks.iterator(); i.hasNext();) { |
| UnknownElement ue = (UnknownElement) i.next(); |
| setLocation(ue.getLocation()); |
| ue.maybeConfigure(); |
| Object configuredObject = ue.getRealThing(); |
| if (configuredObject == null) { |
| continue; |
| } |
| if (!(configuredObject instanceof AntlibDefinition)) { |
| throw new BuildException( |
| "Invalid task in antlib " + ue.getTag() |
| + " " + configuredObject.getClass() + " does not " |
| + "extend org.apache.tools.ant.taskdefs.AntlibDefinition"); |
| } |
| AntlibDefinition def = (AntlibDefinition) configuredObject; |
| def.setURI(uri); |
| def.setAntlibClassLoader(getClassLoader()); |
| def.init(); |
| def.execute(); |
| } |
| } |
| |
| } |