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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. 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://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/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/bootstrap/legal/LICENSE.txt.
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 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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 * and therefore, elected the GPL Version 2 license, then the option applies
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package com.sun.enterprise.deployment.archivist;

import com.sun.enterprise.deployment.Application;
import com.sun.enterprise.deployment.WebBundleDescriptor;
import com.sun.enterprise.deployment.io.DeploymentDescriptorFile;
import com.sun.enterprise.deployment.io.DescriptorConstants;
import com.sun.enterprise.deployment.io.WebDeploymentDescriptorFile;
import com.sun.enterprise.deployment.io.runtime.WebRuntimeDDFile;
import com.sun.enterprise.deployment.util.*;
import org.glassfish.api.deployment.archive.Archive;
import org.glassfish.api.deployment.archive.ReadableArchive;
import org.glassfish.deployment.common.DeploymentUtils;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.PerLookup;
import org.xml.sax.SAXParseException;

import javax.enterprise.deploy.shared.ModuleType;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Vector;
import java.util.logging.Level;


/**
 * This module is responsible for reading and write web applications
 * archive files (war).
 *
 * @author  Jerome Dochez
 * @version 
 */
@Service
@Scoped(PerLookup.class)
public class WebArchivist extends Archivist 
    implements PrivateArchivist {

    /** 
     * The DeploymentDescriptorFile handlers we are delegating for XML i/o
     */
    DeploymentDescriptorFile standardDD = new WebDeploymentDescriptorFile();

    private WebBundleDescriptor defaultBundleDescriptor = null;

    /**
     * @return the  module type handled by this archivist
     * as defined in the application DTD
     *
     */
    @Override
    public XModuleType getModuleType() {
        return XModuleType.WAR;
    }        
    
    /**
     * Archivist read XML deployment descriptors and keep the
     * parsed result in the DOL descriptor instances. Sets the descriptor
     * for a particular Archivst type
     */
    public void setDescriptor(Application descriptor) {
        java.util.Set webBundles = descriptor.getWebBundleDescriptors();
        if (webBundles.size()>0) {
            this.descriptor = (WebBundleDescriptor) webBundles.iterator().next();
            if (this.descriptor.getModuleDescriptor().isStandalone())
                return;
            else
                this.descriptor=null;
        }
    }  
    
    /** 
     * @return the location of the web services related deployment 
     * descriptor file inside this archive or null if this archive
     * does not support webservices implementation.
     */
    @Override
    public String getWebServicesDeploymentDescriptorPath() {
        return DescriptorConstants.WEB_WEBSERVICES_JAR_ENTRY;
    }    
    
    /**
     * @return the DeploymentDescriptorFile responsible for handling
     * standard deployment descriptor
     */
    @Override
    public DeploymentDescriptorFile getStandardDDFile() {
        return standardDD;
    }
    
    /**
     * @return if exists the DeploymentDescriptorFile responsible for
     * handling the configuration deployment descriptors
     */
    @Override
    public DeploymentDescriptorFile getConfigurationDDFile() {
        return new WebRuntimeDDFile();
    }      
    
    /**
     * @return a default BundleDescriptor for this archivist
     */
    @Override
    public WebBundleDescriptor getDefaultBundleDescriptor() {
        return defaultBundleDescriptor;
    }

    /**
     * set a default BundleDescriptor for this archivist
     */
    @Override
    public void setDefaultBundleDescriptor(WebBundleDescriptor defaultWbd) {
        defaultBundleDescriptor = defaultWbd;
    }

    /**
     * perform any post deployment descriptor reading action
     *
     * @param descriptor the deployment descriptor for the module
     * @param archive the module archive
     */
    @Override
    protected void postOpen(WebBundleDescriptor descriptor, ReadableArchive archive)
        throws IOException
    {
        super.postOpen(descriptor, archive);
        WebBundleDescriptor webBundle = (WebBundleDescriptor) descriptor;
        ModuleContentValidator mdv = new ModuleContentValidator(archive);
        webBundle.visit(mdv);
    }

    /**
     * validates the DOL Objects associated with this archivist, usually
     * it requires that a class loader being set on this archivist or passed
     * as a parameter
     */
    @Override
    public void validate(ClassLoader aClassLoader) {
        ClassLoader cl = aClassLoader;
        if (cl==null) {
            cl = classLoader;
        }
        if (cl==null) {
            return;
        }
        descriptor.setClassLoader(cl);
        descriptor.visit((WebBundleVisitor) new ApplicationValidator());
    }            

    /**
     * In the case of web archive, the super handles() method should be able 
     * to make a unique identification.  If not, then the archive is definitely 
     * not a war.
     */
    @Override
    protected boolean postHandles(ReadableArchive abstractArchive)
            throws IOException {
        return DeploymentUtils.isWebArchive(abstractArchive);
    }

    @Override
    protected String getArchiveExtension() {
        return WEB_EXTENSION;
    }
    
    /**
     * @return a list of libraries included in the archivist
     */
    public Vector getLibraries(Archive archive) {
        
        Enumeration entries = archive.entries();
        if (entries==null)
            return null;
        
        Vector libs = new Vector();        
        while (entries.hasMoreElements()) {
            
            String entryName = entries.nextElement();
            if (!entryName.startsWith("WEB-INF/lib")) {
                continue; // not in WEB-INF...
            }
            if (entryName.endsWith(".jar")) {
                libs.add(entryName);
            }            
        }
        return libs;
    }

    @Override
    protected void postStandardDDsRead(WebBundleDescriptor descriptor,
            ReadableArchive archive) throws IOException {
        // read the web fragment after reading the web.xml
        readStandardFragment(descriptor, archive);
        super.postStandardDDsRead(descriptor, archive);
        // apply default from default-web.xml
        if (defaultBundleDescriptor != null) {
            descriptor.addWebBundleDescriptor(defaultBundleDescriptor, true);
        }
    }

    protected void readStandardFragment(WebBundleDescriptor descriptor,
            ReadableArchive archive) throws IOException {

        Vector libs = getLibraries(archive);
        if (libs != null && libs.size() > 0) {
            WebBundleDescriptor mergedWebFragment = null;
            for (int i = 0; i < libs.size(); i++) {
                String lib = (String)libs.get(i);
                Archivist wfArchivist = new WebFragmentArchivist();
                wfArchivist.initializeContext(this);
                wfArchivist.setRuntimeXMLValidation(this.getRuntimeXMLValidation());
                wfArchivist.setRuntimeXMLValidationLevel(
                        this.getRuntimeXMLValidationLevel());
                wfArchivist.setAnnotationProcessingRequested(false);
                ReadableArchive embeddedArchive = archive.getSubArchive(lib);

                if (wfArchivist.hasStandardDeploymentDescriptor(embeddedArchive)) {
                    WebBundleDescriptor wdesc = null;
                    try {
                        wdesc = (WebBundleDescriptor)wfArchivist.open(embeddedArchive);
                    } catch(SAXParseException ex) {
                        IOException ioex = new IOException();
                        ioex.initCause(ex);
                        throw ioex;
                    }

                    if (mergedWebFragment != null) {
                        mergedWebFragment.addWebBundleDescriptor(wdesc);
                    } else {
                        mergedWebFragment = wdesc;
                    }
                }
            }

            if (mergedWebFragment != null) {
                descriptor.addWebBundleDescriptor(mergedWebFragment);
            }
        }
    }
}




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