stevel 2003/01/30 22:46:57 Added: src/main/org/apache/tools/ant/taskdefs WhichResource.java Log: something I wrote to track down too many copies of log4j.properties on my classpath. Docs I leave to xdoc, tests will be written (remind me!). I am still a bit unsure that <whichresource class="foo" > works in jars, though I've seen it work on the file system. Revision Changes Path 1.1 jakarta-ant/src/main/org/apache/tools/ant/taskdefs/WhichResource.java Index: WhichResource.java =================================================================== /* * The Apache Software License, Version 1.1 * * Copyright (c) 2003 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.types.Path; import org.apache.tools.ant.Task; import org.apache.tools.ant.BuildException; import org.apache.tools.ant.Project; import org.apache.tools.ant.AntClassLoader; import java.net.URL; /** * Find a class or resource on the supplied classpath, or the * system classpath if none is supplied. The named property is set if * the item can be found. For example * <pre> * <whichresource resource="/log4j.properties" * property="log4j.url" > * </pre> * @author steve loughran while stuck in Enumclaw, WA, with a broken down car */ public class WhichResource extends Task { /** * our classpath */ private Path classpath; /** * class to look for */ private String classname; /** * resource to look for */ private String resource; /** * property to set */ private String property; /** * Set the classpath to be used for this compilation. */ public void setClasspath(Path cp) { if (classpath == null) { classpath = cp; } else { classpath.append(cp); } } /** * Adds a path to the classpath. */ public Path createClasspath() { if (classpath == null) { classpath = new Path(getProject()); } return classpath.createPath(); } /** * validate */ private void validate() { int setcount=0; if(classname != null) { setcount++; } if(resource!=null) { setcount++; } if(setcount == 0) { throw new BuildException( "One of classname or resource must be specified"); } if (setcount > 1) { throw new BuildException( "Only one of classname or resource can be specified"); } if(property==null) { throw new BuildException("No property defined"); } } /** * execute it * @throws BuildException */ public void execute() throws BuildException { validate(); if (classpath!= null) { getProject().log("using user supplied classpath: " + classpath, Project.MSG_DEBUG); classpath=classpath.concatSystemClasspath("ignore"); } else { classpath = new Path(getProject()); classpath = classpath.concatSystemClasspath("only"); getProject().log("using system classpath: " + classpath, Project.MSG_DEBUG); } AntClassLoader loader; loader = new AntClassLoader(getProject().getCoreLoader(), getProject(), classpath, false); String location=null; if(classname!=null) { //convert a class name into a resource classname= classname.replace('.', '/'); resource="/"+ classname +".class"; } else { if(!resource.startsWith("/")) { resource="/"+resource; } } log("Searching for "+resource,Project.MSG_VERBOSE); URL url; url=loader.getResource(resource); if(url!=null) { //set the property location = url.toExternalForm(); getProject().setNewProperty(property,location); } } /** * name the resource to look for * @param resource */ public void setResource(String resource) { this.resource = resource; } /** * name the class to look for * @param classname */ public void setClass(String classname) { this.classname = classname; } /** * the property to fill with the URL of the resource or class * @param property */ public void setProperty(String property) { this.property = property; } }
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