Moved from discovery - it'll be the start on discovering the tasks.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@273267 13f79535-47bb-0310-9956-ffa450edef68

proposal/embed/src/java/org/apache/tools/ant/taskdefs/ServiceDiscoveryTask.java

@@ -0,0 +1,116 @@
+/*
+ * ====================================================================
+ *
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 1999-2002 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", "Commons", 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 apache@apache.org.
+ *
+ * 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 java.util.Vector;
+
+import org.apache.commons.discovery.ResourceName;
+import org.apache.commons.discovery.ResourceNameIterator;
+import org.apache.commons.discovery.jdk.JDKHooks;
+import org.apache.commons.discovery.resource.DiscoverResources;
+
+
+/**
+ * Small ant task that will use discovery to locate a particular impl.
+ * and display all values.
+ *
+ * You can execute this and save it with an id, then other classes can use it.
+ *
+ * @author Costin Manolache
+ */
+public class ServiceDiscoveryTask
+{
+    String name;
+    int debug=0;
+    ResourceName[] drivers = null;
+        
+    public void setServiceName(String name ) {
+        this.name=name;
+    }
+
+    public void setDebug(int i) {
+        this.debug=debug;
+    }
+
+    public ResourceName[] getServiceInfo() {
+        return drivers;
+    }
+
+    public void execute() throws Exception {
+        System.out.println("XXX ");
+        
+        DiscoverResources disc = new DiscoverResources();
+        disc.addClassLoader( JDKHooks.getJDKHooks().getThreadContextClassLoader() );
+        disc.addClassLoader( this.getClass().getClassLoader() );
+        
+        ResourceNameIterator enum = disc.findResources(name);
+
+        Vector vector = new Vector();
+        while (enum.hasNext()) {
+            ResourceName resourceInfo = enum.nextResourceName();
+            vector.add(resourceInfo);
+            if( debug > 0 ) {
+                System.out.println("Found " + resourceInfo);
+            }
+        }
+        
+        drivers = new ResourceName[vector.size()];
+        vector.copyInto(drivers);
+    }
+        
+}