/**
 * Licensed to jclouds, Inc. (jclouds) under one or more
 * contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  jclouds 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.
 */
package org.jclouds.savvis.vpdc.xml;

import static org.jclouds.util.SaxUtils.currentOrNull;
import static org.jclouds.util.SaxUtils.equalsOrSuffix;

import javax.inject.Inject;

import org.jclouds.http.functions.ParseSax;
import org.jclouds.savvis.vpdc.domain.FirewallService;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;

/**
 * @author Kedar Dave
 */
public class FirewallServiceHandler extends ParseSax.HandlerWithResult<FirewallService> {
   protected StringBuilder currentText = new StringBuilder();
   private FirewallRuleHandler firewallRuleHandler;
   private FirewallService.Builder builder = FirewallService.builder();
   boolean inFirewallService;
   boolean inFirewallRule;

   @Inject
   public FirewallServiceHandler(FirewallRuleHandler firewallRuleHandler) {
      this.firewallRuleHandler = firewallRuleHandler;
   }

   public FirewallService getResult() {
      try {
         return builder.build();
      } finally {
         builder = FirewallService.builder();
      }
   }

   public void startElement(String uri, String localName, String qName, Attributes attrs) throws SAXException {
      if (equalsOrSuffix(qName, "FirewallService")) {
         inFirewallService = true;
      } else if (equalsOrSuffix(qName, "FirewallRule")) {
         inFirewallRule = true;
         firewallRuleHandler.startElement(uri, localName, qName, attrs);
      }
   }

   @Override
   public void endElement(String uri, String localName, String qName) throws SAXException {
      if (equalsOrSuffix(qName, "FirewallService")) {
         inFirewallService = false;
      } else if (equalsOrSuffix(qName, "FirewallRule")) {
         builder.firewallRule(firewallRuleHandler.getResult());
         inFirewallRule = false;
      } else if (equalsOrSuffix(qName, "isEnabled")) {
         if (inFirewallService) {
            String current = currentOrNull(currentText);
            if (current != null) {
               builder.isEnabled(Boolean.parseBoolean(current));
            }
         }
      }

      if (inFirewallRule) {
         firewallRuleHandler.endElement(uri, localName, qName);
      }
      currentText = new StringBuilder();
   }

   @Override
   public void characters(char ch[], int start, int length) {
      currentText.append(ch, start, length);
      firewallRuleHandler.characters(ch, start, length);
   }

}
