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Embedded-Web Distribution of the Payara Project
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/*
 *   DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 *   Copyright (c) [2019] Payara Foundation and/or its affiliates.
 *   All rights reserved.
 *
 *   The contents of this file are subject to the terms of either the GNU
 *   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://github.com/payara/Payara/blob/master/LICENSE.txt
 *   See the License for the specific
 *   language governing permissions and limitations under the License.
 *
 *   When distributing the software, include this License Header Notice in each
 *   file and include the License file at glassfish/legal/LICENSE.txt.
 *
 *   GPL Classpath Exception:
 *   The Payara Foundation designates this particular file as subject to the
 *   "Classpath" exception as provided by the Payara Foundation in the GPL
 *   Version 2 section of the License file that accompanied this code.
 *
 *   Modifications:
 *   If applicable, add the following below the License Header, with the fields
 *   enclosed by brackets [] replaced by your own identifying information:
 *   "Portions Copyright [year] [name of copyright owner]"
 *
 *   Contributor(s):
 *   If you wish your version of this file to be governed by only the CDDL or
 *   only the GPL Version 2, indicate your decision by adding "[Contributor]
 *   elects to include this software in this distribution under the [CDDL or GPL
 *   Version 2] license."  If you don't indicate a single choice of license, a
 *   recipient has the option to distribute your version of this file under
 *   either the CDDL, the GPL Version 2 or to extend the choice of license to
 *   its licensees as provided above.  However, if you add GPL Version 2 code
 *   and therefore, elected the GPL Version 2 license, then the option applies
 *   only if the new code is made subject to such option by the copyright
 *   holder.
 */
package org.glassfish.webservices.metroglue;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.Optional;

import org.glassfish.api.invocation.InvocationManager;
import org.glassfish.internal.api.Globals;

import com.sun.enterprise.web.WebComponentInvocation;
import com.sun.enterprise.web.WebModule;
import com.sun.xml.ws.api.ResourceLoader;

/**
 * Resource loader that uses a TLS stored web invocation if present to resolve
 * a resource against WEB-INF of the current web module (if any).
 * 
 * @author Arjan Tijms
 *
 */
public class WebInfResourceLoader extends ResourceLoader {
    
    @Override
    public URL getResource(String resource) throws MalformedURLException {
        InvocationManager invocationManager = Globals.get(InvocationManager.class);
        
        if (invocationManager != null) {
            Optional webModule = 
                invocationManager.getAllInvocations()
                                 .stream()
                                 .filter(e -> e instanceof WebComponentInvocation)
                                 .map(e -> WebComponentInvocation.class.cast(e))
                                 .map(e -> WebModule.class.cast(e.getContainer()))
                                 .findFirst();
            
            if (webModule.isPresent()) {
                return webModule.get().getResource("/WEB-INF/" + resource);
            }
        }
        
        return null;
    }
}