content: /*
   *  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
   *
   *      https://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.apache.ivy.osgi.updatesite.xml;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import javax.xml.parsers.ParserConfigurationException;
  
  import org.apache.ivy.osgi.core.ExecutionEnvironmentProfileProvider;
  import org.apache.ivy.osgi.updatesite.UpdateSiteDescriptor;
  import org.apache.ivy.osgi.updatesite.xml.FeatureParser.FeatureHandler;
  import org.apache.ivy.osgi.util.DelegatingHandler;
  import org.apache.ivy.util.XMLHelper;
  import org.xml.sax.SAXException;
  
  public class UpdateSiteDigestParser {
  
      public static UpdateSiteDescriptor parse(InputStream in, UpdateSite site) throws IOException,
              SAXException {
          DigestHandler handler = new DigestHandler(site);
          try {
              XMLHelper.parse(in, null, handler, null);
          } catch (ParserConfigurationException e) {
              throw new SAXException(e);
          }
          return handler.repoDescriptor;
      }
  
      static class DigestHandler extends DelegatingHandler {
  
          private static final String DIGEST = "digest";
  
          UpdateSiteDescriptor repoDescriptor;
  
          public DigestHandler(final UpdateSite site) {
              super(DIGEST);
              repoDescriptor = new UpdateSiteDescriptor(site.getUri(),
                      ExecutionEnvironmentProfileProvider.getInstance());
              addChild(new FeatureHandler(), new ChildElementHandler<FeatureHandler>() {
                  @Override
                  public void childHandled(FeatureHandler child) {
                      repoDescriptor.addFeature(child.feature);
                  }
              });
          }
  
      }
  
  }
  