/**
    *
    * Copyright (C) 2011 Cloud Conscious, LLC. <info@cloudconscious.com>
    *
    * ====================================================================
    * Licensed 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.savvis.vpdc.util.Utils.cleanseAttributes;
  import static org.jclouds.savvis.vpdc.util.Utils.currentOrNull;
  import static org.jclouds.savvis.vpdc.util.Utils.newResource;
  import static org.jclouds.util.SaxUtils.equalsOrSuffix;
  
  import java.util.Map;
  
  import org.jclouds.http.functions.ParseSax;
  import org.jclouds.savvis.vpdc.domain.Link;
  import org.jclouds.savvis.vpdc.domain.Org;
  import org.jclouds.savvis.vpdc.domain.Resource;
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  
  import com.google.common.collect.ImmutableMap;
  
  /**
   * @author Adrian Cole
   */
  public class OrgHandler extends ParseSax.HandlerWithResult<Org> {
  
     protected StringBuilder currentText = new StringBuilder();
  
     protected Org.Builder builder = Org.builder();
  
     public Org getResult() {
        try {
           return builder.build();
        } finally {
           builder = Org.builder();
        }
     }
  
     @Override
     public void startElement(String uri, String localName, String qName, Attributes attrs) throws SAXException {
        Map<String, String> attributes = cleanseAttributes(attrs);
        if (equalsOrSuffix(qName, "Org")) {
           // savvis doesn't add href in the header for some reason
           if (!attributes.containsKey("href") && getRequest() != null)
              attributes = ImmutableMap.<String, String> builder().putAll(attributes)
                    .put("href", getRequest().getEndpoint().toASCIIString()).build();
           Resource org = newResource(attributes);
           builder.name(org.getName()).type(org.getType()).id(org.getId()).href(org.getHref());
        } else if (equalsOrSuffix(qName, "Link")) {
           Link link = Link.class.cast(newResource(attributes));
           if ("down".equals(link.getRel()))
              builder.vDC(link);
           else
              builder.image(link);
        }
     }
  
     public void endElement(String uri, String name, String qName) {
        if (equalsOrSuffix(qName, "Description")) {
           builder.description(currentOrNull(currentText));
        }
        currentText = new StringBuilder();
     }
  
     public void characters(char ch[], int start, int length) {
        currentText.append(ch, start, length);
     }
  }