/* * ModuleLoader - A generic, policy-driven class loader. * Copyright (c) 2004, Richard S. Hall * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * *   * Redistributions of source code must retain the above copyright *     notice, this list of conditions and the following disclaimer. *   * 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. *   * Neither the name of the ungoverned.org nor the names of its *     contributors may be used to endorse or promote products derived *     from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS 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 COPYRIGHT * OWNER OR 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. * * Contact: Richard S. Hall (heavy@ungoverned.org) * Contributor(s): ***/package org.ungoverned.moduleloader.search;import java.net.URL;import org.ungoverned.moduleloader.Module;import org.ungoverned.moduleloader.ModuleManager;import org.ungoverned.moduleloader.SearchPolicy;/** * <p> * This class implements a <tt>ModuleLoader</tt> search policy that * assumes that all modules are self-contained. In other words, when * loading a class or resource for a particular module, only that * particular module's resource sources are search. No classes or * resources are shared among modules. * </p> * @see org.ungoverned.moduleloader.SearchPolicy * @see org.ungoverned.moduleloader.Module * @see org.ungoverned.moduleloader.ModuleClassLoader * @see org.ungoverned.moduleloader.ModuleManager**/public class SelfContainedSearchPolicy implements SearchPolicy{    private ModuleManager m_mgr = null;    /**     * This method is part of the <tt>SearchPolicy</tt> interface.     * This method is called by the <tt>ModuleManager</tt> once to     * give the search policy instance a reference to its associated     * module manager. This method should be implemented such that     * it cannot be called twice; calling this method a second time     * should produce an illegal state exception.     * @param mgr the module manager associated with this search policy.     * @throws java.lang.IllegalStateException if the method is called     *         more than once.    **/    public void setModuleManager(ModuleManager mgr)        throws IllegalStateException    {        if (m_mgr == null)        {            m_mgr = mgr;        }        else        {            throw new IllegalStateException("Module manager is already initialized");        }    }    /**     * Simply returns <tt>null</tt> which forces the module class     * loader to only search the target module's resource sources     * for the specified class.     * @param module the target module that is loading the class.     * @param name the name of the class being loaded.     * @return <tt>null</tt>.    **/    public Class findClass(Module module, String name)    {        return null;    }    /**     * Simply returns <tt>null</tt> which forces the module class     * loader to only search the target module's resource sources     * for the specified resource.     * @param module the target module that is loading the class.     * @param name the name of the resource being loaded.     * @return <tt>null</tt>.    **/    public URL findResource(Module module, String name)    {        return null;    }}