Glassfish example source code file (ConnectorClassFinder.java)

This example Glassfish source code file (ConnectorClassFinder.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

asurlclassloader, class, class, classnotfoundexception, connectorclassfinder, connectorclassfinder, delegatingclassloader, delegatingclassloader, string, string

The Glassfish ConnectorClassFinder.java source code

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 *
 * Copyright (c) 2007-2010 Oracle and/or its affiliates. All rights reserved.
 *
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 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
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 * file and include the License file at packager/legal/LICENSE.txt.
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 */

package org.glassfish.internal.api;

import com.sun.enterprise.loader.ASURLClassLoader;

/**
 * connector-class-finder to provide a class from its .rar
 *
 * @author Jagadish Ramu
 */
public class ConnectorClassFinder extends ASURLClassLoader implements DelegatingClassLoader.ClassFinder {

        private final DelegatingClassLoader.ClassFinder librariesClassFinder;
        private volatile String raName;

    public ConnectorClassFinder(ClassLoader parent, String raName,
                                              DelegatingClassLoader.ClassFinder finder){
            super(parent);
            this.raName = raName;
            
            // There should be better approach to skip libraries Classloader when none specified.
            // casting to DelegatingClassLoader is not a clean approach
            DelegatingClassLoader.ClassFinder libcf = null;
            if(finder!= null && (finder instanceof DelegatingClassLoader)){
                if(((DelegatingClassLoader)finder).getDelegates().size() > 0){
                    libcf = finder;
                }
            }
            this.librariesClassFinder = libcf;
        }

    public Class<?> findClass(String name) throws ClassNotFoundException {
            Class c = null;

            if(librariesClassFinder != null){
                try{
                    c = librariesClassFinder.findClass(name);
                }catch(ClassNotFoundException cnfe){
                    //ignore
                }
                if(c != null){
                    return c;
                }
            }
            return super.findClass(name);
        }

        public Class<?> findExistingClass(String name) {
            if(librariesClassFinder != null){
                Class claz = librariesClassFinder.findExistingClass(name);
                if(claz != null){
                    return claz;
                }
            }
            return super.findLoadedClass(name);
        }

        public String getResourceAdapterName(){
            return raName;
        }

        public void setResourceAdapterName(String raName){
            this.raName = raName;
        }
    }