JbossAppXmlWriter

package org.apache.maven.plugins.ear;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.util.List;

import org.codehaus.plexus.util.xml.XMLWriter;

/**
 * An {@code XmlWriter} based implementation used to generate a {@code jboss-app.xml} file
 *
 * @author <a href="snicoll@apache.org">Stephane Nicoll</a>
 */
final class JbossAppXmlWriter
    extends AbstractXmlWriter
{

    public static final String DOCTYPE_3_2 = "jboss-app PUBLIC\n" + "\t\"-//JBoss//DTD J2EE Application 1.3//EN\"\n"
        + "\t\"http://www.jboss.org/j2ee/dtd/jboss-app_3_2.dtd\"";

    public static final String DOCTYPE_4 = "jboss-app PUBLIC\n" + "\t\"-//JBoss//DTD J2EE Application 1.4//EN\"\n"
        + "\t\"http://www.jboss.org/j2ee/dtd/jboss-app_4_0.dtd\"";

    public static final String DOCTYPE_4_2 = "jboss-app PUBLIC\n" + "\t\"-//JBoss//DTD J2EE Application 4.2//EN\"\n"
        + "\t\"http://www.jboss.org/j2ee/dtd/jboss-app_4_2.dtd\"";

    public static final String DOCTYPE_5 = "jboss-app PUBLIC\n" + "\t\"-//JBoss//DTD Java EE Application 5.0//EN\"\n"
        + "\t\"http://www.jboss.org/j2ee/dtd/jboss-app_5_0.dtd\"";

    private static final String JBOSS_APP_ELEMENT = "jboss-app";

    private static final String MODULE_ELEMENT = "module";

    private static final String SERVICE_ELEMENT = "service";

    JbossAppXmlWriter( String encoding )
    {
        super( encoding );
    }

    public void write( File destinationFile, JbossConfiguration jbossConfiguration, List<EarModule> earModules )
        throws EarPluginException
    {
        try ( Writer w = initializeWriter( destinationFile ) )
        {
            XMLWriter writer;
            if ( jbossConfiguration.isJbossThreeDotTwo() )
            {
                writer = initializeXmlWriter( w, DOCTYPE_3_2 );
            }
            else if ( jbossConfiguration.isJbossFour() )
            {
                writer = initializeXmlWriter( w, DOCTYPE_4 );
            }
            else if ( jbossConfiguration.isJbossFourDotTwo() )
            {
                writer = initializeXmlWriter( w, DOCTYPE_4_2 );
            }
            else
            {
                writer = initializeXmlWriter( w, DOCTYPE_5 );
            }
            writer.startElement( JBOSS_APP_ELEMENT );

            // Make sure to write the things in the right order so that the DTD validates

            // module-order (only available as from 4.2)
            if ( jbossConfiguration.isJbossFourDotTwoOrHigher() && jbossConfiguration.getModuleOrder() != null )
            {
                writer.startElement( JbossConfiguration.MODULE_ORDER );
                writer.writeText( jbossConfiguration.getModuleOrder() );
                writer.endElement();
            }

            // If JBoss 4, write the jboss4 specific stuff
            if ( jbossConfiguration.isJbossFourOrHigher() )
            {
                if ( jbossConfiguration.getSecurityDomain() != null )
                {
                    writer.startElement( JbossConfiguration.SECURITY_DOMAIN );
                    writer.writeText( jbossConfiguration.getSecurityDomain() );
                    writer.endElement();
                }
                if ( jbossConfiguration.getUnauthenticatedPrincipal() != null )
                {
                    writer.startElement( JbossConfiguration.UNAUHTHENTICTED_PRINCIPAL );
                    writer.writeText( jbossConfiguration.getUnauthenticatedPrincipal() );
                    writer.endElement();
                }
            }

            // classloader repository
            if ( jbossConfiguration.getLoaderRepository() != null
                || jbossConfiguration.getLoaderRepositoryConfig() != null )
            {
                writer.startElement( JbossConfiguration.LOADER_REPOSITORY );

                // classloader repository class
                if ( jbossConfiguration.getLoaderRepositoryClass() != null )
                {
                    writer.addAttribute( JbossConfiguration.LOADER_REPOSITORY_CLASS_ATTRIBUTE,
                                         jbossConfiguration.getLoaderRepositoryClass() );
                }

                // we don't need to write any text if only the loader repo configuration is changed
                if ( jbossConfiguration.getLoaderRepository() != null )
                {
                    writer.writeText( jbossConfiguration.getLoaderRepository() );
                }

                // classloader configuration
                if ( jbossConfiguration.getLoaderRepositoryConfig() != null )
                {
                    writer.startElement( JbossConfiguration.LOADER_REPOSITORY_CONFIG );

                    // classloader configuration parser
                    if ( jbossConfiguration.getConfigParserClass() != null )
                    {
                        writer.addAttribute( JbossConfiguration.CONFIG_PARSER_CLASS_ATTRIBUTE,
                                             jbossConfiguration.getConfigParserClass() );
                    }
                    writer.writeText( jbossConfiguration.getLoaderRepositoryConfig() );
                    writer.endElement();
                }

                writer.endElement();
            }

            // jmx name
            if ( jbossConfiguration.getJmxName() != null )
            {
                writer.startElement( JbossConfiguration.JMX_NAME );
                writer.writeText( jbossConfiguration.getJmxName() );
                writer.endElement();
            }

            // library-directory (only available as from 4.2)
            if ( jbossConfiguration.isJbossFourDotTwoOrHigher() && jbossConfiguration.getLibraryDirectory() != null )
            {
                writer.startElement( JbossConfiguration.LIBRARY_DIRECTORY );
                writer.writeText( jbossConfiguration.getLibraryDirectory() );
                writer.endElement();
            }

            // Modules

            List<String> dataSources = jbossConfiguration.getDataSources();
            // Write out data source modules first
            if ( dataSources != null )
            {
                for ( String dsPath : dataSources )
                {
                    writer.startElement( MODULE_ELEMENT );
                    writer.startElement( SERVICE_ELEMENT );
                    writer.writeText( dsPath );
                    writer.endElement();
                    writer.endElement();
                }
            }

            // Write the JBoss specific modules
            for ( EarModule earModule : earModules )
            {
                if ( JbossEarModule.class.isInstance( earModule ) )
                {
                    JbossEarModule jbossEarModule = (JbossEarModule) earModule;
                    jbossEarModule.appendJbossModule( writer, jbossConfiguration.getVersion() );
                }
            }
            writer.endElement();

        }
        catch ( IOException ex )
        {
            throw new EarPluginException( ex );
        }
    }
}