/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.as.server.parsing;

import static org.jboss.as.controller.parsing.Namespace.CURRENT;

import java.util.List;
import java.util.Set;
import java.util.concurrent.ExecutorService;

import javax.xml.stream.XMLStreamException;

import org.jboss.as.controller.extension.ExtensionRegistry;
import org.jboss.as.controller.parsing.DeferredExtensionContext;
import org.jboss.as.controller.parsing.ExtensionXml;
import org.jboss.as.controller.parsing.Namespace;
import org.jboss.as.controller.parsing.ProfileParsingCompletionHandler;
import org.jboss.as.controller.persistence.ModelMarshallingContext;
import org.jboss.dmr.ModelNode;
import org.jboss.modules.ModuleLoader;
import org.jboss.staxmapper.XMLElementReader;
import org.jboss.staxmapper.XMLElementWriter;
import org.jboss.staxmapper.XMLExtendedStreamReader;
import org.jboss.staxmapper.XMLExtendedStreamWriter;

/**
 * A mapper between an AS server's configuration model and XML representations, particularly {@code standalone.xml}.
 *
 * @author <a href="mailto:david.lloyd@redhat.com">David M. Lloyd</a>
 * @author <a href="mailto:darran.lofthouse@jboss.com">Darran Lofthouse</a>
 */
public final class StandaloneXml implements XMLElementReader<List<ModelNode>>, XMLElementWriter<ModelMarshallingContext> {

    public enum ParsingOption {
        /**
         * This options instructs the parser to ignore failures that result
         * from parsing subsystem elements. If provided it leads to a warning message being logged.
         * If omitted, the parser will exit with an exception when encountering errors at a subsystem element.
         */
        IGNORE_SUBSYSTEM_FAILURES();

        /**
         * Verifies if an option exist in an array of options
         * @param options options to check
         * @return {@code true} if this option matches any of {@code options}
         */
        public boolean isSet(ParsingOption[] options) {
            boolean matches = false;
            for (ParsingOption option : options) {
                if(this.equals(option)) {
                    matches = true;
                    break;
                }
            }
            return matches;
        }
    }

    private final ParsingOption[] parsingOptions;
    private final ExtensionHandler extensionHandler;
    private final DeferredExtensionContext deferredExtensionContext;

    public StandaloneXml(final ModuleLoader loader, final ExecutorService executorService,
            final ExtensionRegistry extensionRegistry) {
        deferredExtensionContext = new DeferredExtensionContext(loader, extensionRegistry, executorService);
        this.extensionHandler = new DefaultExtensionHandler(extensionRegistry, deferredExtensionContext);
        this.parsingOptions = new ParsingOption[] {};
    }

    public StandaloneXml(ExtensionHandler handler, DeferredExtensionContext deferredExtensionContext, ParsingOption... options) {
        this.extensionHandler = handler;
        this.parsingOptions = options;
        this.deferredExtensionContext = deferredExtensionContext;
    }

    @Override
    public void readElement(final XMLExtendedStreamReader reader, final List<ModelNode> operationList)
            throws XMLStreamException {
        Namespace readerNS = Namespace.forUri(reader.getNamespaceURI());
        switch (readerNS.getMajorVersion()) {
            case 1:
            case 2:
            case 3:
                new StandaloneXml_Legacy(extensionHandler, readerNS, deferredExtensionContext, parsingOptions)
                        .readElement(reader, operationList);
                break;
            case 4:
                new StandaloneXml_4(extensionHandler, readerNS, deferredExtensionContext, parsingOptions).readElement(reader, operationList);
                break;
            case 5:
                new StandaloneXml_5(extensionHandler, readerNS, deferredExtensionContext, parsingOptions).readElement(reader, operationList);
                break;
            case 6:
                new StandaloneXml_6(extensionHandler, readerNS, deferredExtensionContext, parsingOptions).readElement(reader, operationList);
                break;
            case 7:
                new StandaloneXml_7(extensionHandler, readerNS, deferredExtensionContext, parsingOptions).readElement(reader, operationList);
                break;
            case 8:
                new StandaloneXml_8(extensionHandler, readerNS, deferredExtensionContext, parsingOptions).readElement(reader, operationList);
                break;
            case 9:
                new StandaloneXml_9(extensionHandler, readerNS, deferredExtensionContext, parsingOptions).readElement(reader, operationList);
                break;
            default:
                new StandaloneXml_10(extensionHandler, readerNS, deferredExtensionContext, parsingOptions).readElement(reader, operationList);
        }

    }

    @Override
    public void writeContent(final XMLExtendedStreamWriter writer, final ModelMarshallingContext context)
            throws XMLStreamException {
        new StandaloneXml_10(extensionHandler, CURRENT, deferredExtensionContext, parsingOptions).writeContent(writer, context);
    }

    class DefaultExtensionHandler implements ExtensionHandler {

        private final ExtensionXml extensionXml;
        private final ExtensionRegistry extensionRegistry;

        DefaultExtensionHandler(ExtensionRegistry extensionRegistry, DeferredExtensionContext deferredExtensionContext) {
            this.extensionRegistry = extensionRegistry;
            this.extensionXml = new ExtensionXml(deferredExtensionContext);
        }

        @Override
        public void parseExtensions(XMLExtendedStreamReader reader, ModelNode address, Namespace namespace, List<ModelNode> list) throws XMLStreamException {
            extensionXml.parseExtensions(reader, address, namespace, list);
        }

        @Override
        public Set<ProfileParsingCompletionHandler> getProfileParsingCompletionHandlers() {
            return extensionRegistry.getProfileParsingCompletionHandlers();
        }

        @Override
        public void writeExtensions(XMLExtendedStreamWriter writer, ModelNode modelNode) throws XMLStreamException {
            extensionXml.writeExtensions(writer, modelNode);
        }
    }

}
