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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2008 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.
 * Sun designates this particular file as subject to the "Classpath" exception
 * 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
 * identifying information: "Portions Copyrighted [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.deployment.client;

import java.io.IOException;
import java.io.InputStream;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;

/**
 *
 * @author tjquinn
 */
public class CommandXMLResultParser {

    static DFDeploymentStatus parse(InputStream is) throws ParserConfigurationException, SAXException, IOException {
        SAXParserFactory pf = SAXParserFactory.newInstance();
        SAXParser parser = pf.newSAXParser();
        
        
        
        DFDeploymentStatus topStatus = null;
        ResultHandler rh = new ResultHandler();
        parser.parse(is, rh);
        
        topStatus = rh.getTopStatus();
        
        return topStatus;
    }
    
    private static DFDeploymentStatus.Status exitCodeToStatus(String exitCodeText) {
        return DFDeploymentStatus.Status.valueOf(exitCodeText);
    }
    
    private static class ResultHandler extends DefaultHandler {

        private DFDeploymentStatus topStatus;
        
        /** currentLevel will always point to the depl status we are currently working on */
        private DFDeploymentStatus currentLevel;

        private String attrToText(Attributes attrs, String attrName) {
            return attrs.getValue(attrName);
        }
        
        private DFDeploymentStatus getTopStatus() {
            return topStatus;
        }
        
        @Override
        public void startElement(String uri, String localName, String qName,
                                 Attributes attributes) throws SAXException {
            if (qName.equals("action-report")) {
                /*
                 * If this is the first action-report then the resulting
                 * DFDeploymentStatus will be the top-level one as well as the
                 * current-level one.
                 */
                if (topStatus == null) { 
                    currentLevel = topStatus = new DFDeploymentStatus();
                } else {
                    /*
                     * This is a nested action-report, so add it as a sub-stage
                     * to the current level DFDeploymentStatus.
                     */
                    DFDeploymentStatus newLevel = new DFDeploymentStatus();
                    currentLevel.addSubStage(newLevel);
                    currentLevel = newLevel;
                }
                currentLevel.setStageStatus(exitCodeToStatus(attrToText(attributes, "exit-code")));
                currentLevel.setStageDescription(attrToText(attributes, "description"));
                String failureCause = attrToText(attributes, "failure-cause");
                if (failureCause != null) {
                    currentLevel.setStageStatusMessage(failureCause);
                }
            } else if (qName.equals("message-part")) {
                /*
                 * The "message" attribute may not be present if the operation succeeded.
                 */
                String msg = attrToText(attributes, "message");
                if (msg != null) {
                    msg = currentLevel.getStageStatusMessage() + " " + msg;
                    currentLevel.setStageStatusMessage(msg);
                }
            } else if (qName.equals("property")) {
                currentLevel.addProperty(attrToText(attributes, "name"), attrToText(attributes, "value"));
            }
        }

        @Override
        public void endElement(String uri, String localName, String qName) throws SAXException {
            if (qName.equals("action-report")) {
                currentLevel = currentLevel.getParent();
            }
        }
    }
}