costin 2002/12/23 17:27:45 Added: src/main/org/apache/tools/ant/taskdefs Classloader.java Log: Add the <classloader> task. It'll create a new loader or add paths to an existing loader. The main use is for the core loader - used to load ant regular and optional tasks. This is similar with embed, but 90% of the code is not needed for ant1.6 ( due to the delayed task creation ). For both import and classloader I changed the name of the class so embed can still compile. Revision Changes Path 1.1 jakarta-ant/src/main/org/apache/tools/ant/taskdefs/Classloader.java Index: Classloader.java =================================================================== /* * The Apache Software License, Version 1.1 * * Copyright (c) 2000-2002 The Apache Software Foundation. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, if * any, must include the following acknowlegement: * "This product includes software developed by the * Apache Software Foundation (http://www.apache.org/)." * Alternately, this acknowlegement may appear in the software itself, * if and wherever such third-party acknowlegements normally appear. * * 4. The names "The Jakarta Project", "Ant", and "Apache Software * Foundation" must not be used to endorse or promote products derived * from this software without prior written permission. For written * permission, please contact [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ==================================================================== * * This software consists of voluntary contributions made by many * individuals on behalf of the Apache Software Foundation. For more * information on the Apache Software Foundation, please see * <http://www.apache.org/>. */ package org.apache.tools.ant.taskdefs; import org.apache.tools.ant.*; import org.apache.tools.ant.types.*; import java.io.*; import java.util.*; import org.xml.sax.Locator; import org.xml.sax.InputSource; //import org.xml.sax.HandlerBase; import org.xml.sax.SAXParseException; import org.xml.sax.XMLReader; import org.xml.sax.SAXException; import org.xml.sax.DocumentHandler; import org.xml.sax.Attributes; import org.xml.sax.AttributeList; import org.xml.sax.helpers.XMLReaderAdapter; import org.xml.sax.helpers.DefaultHandler; import org.xml.sax.helpers.AttributeListImpl; import javax.xml.parsers.SAXParserFactory; import javax.xml.parsers.SAXParser; import javax.xml.parsers.ParserConfigurationException; /** * EXPERIMENTAL * Create or modifies ClassLoader. The required pathRef parameter * will be used to add classpath elements. * * The classpath is a regular path. Currently only file components are * supported ( future extensions may allow URLs ). * * You can modify the core loader by not specifying any name or using * "ant.coreLoader". ( the core loader is used to load system ant * tasks and for taskdefs that don't specify an explicit path ). * * Taskdef and typedef can use the loader you create if the name follows * the "ant.loader.NAME" pattern. NAME will be used as a pathref when * calling taskdef. * * This tasks will not modify the core loader if "build.sysclasspath=only" * * The typical use is: * <pre> * <path id="ant.deps" > * <fileset dir="myDir" > * <include name="junit.jar, bsf.jar, js.jar, etc"/> * </fileset> * </path> * * <classloader pathRef="ant.deps" /> * * </pre> * * @author Costin Manolache */ public class Classloader extends Task { public static final String SYSTEM_LOADER_REF="ant.coreLoader"; private String name=null; private Path path; private boolean reset=false; private boolean reverse=false; private String parentName=null; public Classloader() { } /** Name of the loader. If none, the default loader will be modified * * @param name */ public void setName(String name) { this.name=name; } /** Reset the classloader, if it already exists. A new loader will * be created and all the references to the old one will be removed. * ( it is not possible to remove paths from a loader ). The new * path will be used. * * @param b */ public void setReset(boolean b) { this.reset=b; } // TODO public void setReverse(boolean b ) { this.reverse=b; } // TODO: add exceptions for delegation or reverse // TODO public void setParentName( String name ) { this.parentName=name; } /** Specify which path will be used. If the loader already exists * and is an AntClassLoader ( or any other loader we can extend ), * the path will be added to the loader. */ public void setPathRef( Reference pathRef ) throws BuildException { path=(Path)pathRef.getReferencedObject(project); } public void execute() { try { // Gump friendly - don't mess with the core loader if only classpath if( "only".equals( project.getProperty("build.sysclasspath")) && (name==null || SYSTEM_LOADER_REF.equals( name ))) { log( "Changing the system loader is disabled " + "by build.sysclasspath=only", Project.MSG_WARN); return; } String loaderName=(name==null) ? SYSTEM_LOADER_REF : name; Object obj=project.getReference(loaderName); if( reset ) { // Are any other references held ? Can we 'close' the loader // so it removes the locks on jars ? obj=null; // a new one will be created. } // XXX maybe use reflection to addPathElement ( other patterns ?) if( obj!=null && !(obj instanceof AntClassLoader )) { log( "Referenced object is not an AntClassLoader", Project.MSG_ERR); return; } AntClassLoader acl=(AntClassLoader)obj; if( acl==null ) { // Construct a class loader Object parent=null; if( parentName != null ) { parent=project.getReference(parentName); if( !(parent instanceof ClassLoader) ) { parent=null; } } if( parent==null ) { parent=this.getClass().getClassLoader(); } acl=new AntClassLoader( (ClassLoader)parent, project, path, reverse ); project.addReference( loaderName, acl ); if( name==null ) { // This allows the core loader to load optional tasks // without delegating acl.addLoaderPackageRoot( "org.apache.tools.ant.taskdefs.optional"); project.setCoreLoader(acl); } } if( path != null ) { String list[]=path.list(); for( int i=0; i<list.length; i++ ) { File f= new File( list[i] ); if( f.exists() ) { acl.addPathElement(f.getAbsolutePath()); log("Adding to class loader " + acl + " " + f.getAbsolutePath(), Project.MSG_DEBUG); } } } // XXX add exceptions } catch( Exception ex ) { ex.printStackTrace(); } } }
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