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   *  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
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  package org.apache.cayenne.configuration.xml;
  
  import org.apache.cayenne.configuration.DataChannelDescriptor;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.xml.sax.Attributes;
  import org.xml.sax.ContentHandler;
  
  /**
   * @since 4.1
   */
  public final class DataChannelHandler extends VersionAwareHandler {
  
      private static final Logger logger = LoggerFactory.getLogger(XMLDataChannelDescriptorLoader.class);
  
      static final String DOMAIN_TAG = "domain";
  
      private XMLDataChannelDescriptorLoader xmlDataChannelDescriptorLoader;
      DataChannelDescriptor descriptor;
  
      public DataChannelHandler(XMLDataChannelDescriptorLoader xmlDataChannelDescriptorLoader, DataChannelDescriptor dataChannelDescriptor, LoaderContext loaderContext) {
          super(loaderContext, DOMAIN_TAG);
          this.xmlDataChannelDescriptorLoader = xmlDataChannelDescriptorLoader;
          this.descriptor = dataChannelDescriptor;
          setTargetNamespace(DataChannelDescriptor.SCHEMA_XSD);
      }
  
      @Override
      protected ContentHandler createChildTagHandler(String namespaceURI, String localName,
                                                     String name, Attributes attributes) {
  
          if (localName.equals(DOMAIN_TAG)) {
              return new DataChannelChildrenHandler(xmlDataChannelDescriptorLoader, this);
          }
  
          logger.info(unexpectedTagMessage(localName, DOMAIN_TAG));
          return super.createChildTagHandler(namespaceURI, localName, name, attributes);
      }
  }
  