- /*
- * Copyright 2003-2004 The Apache Software Foundation
- *
- * Licensed 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.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();
- }
- }
-
- }