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   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
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  package org.apache.cayenne.configuration.xml;
  
  import org.apache.cayenne.map.EmbeddedAttribute;
  import org.apache.cayenne.map.ObjEntity;
  import org.xml.sax.Attributes;
  import org.xml.sax.SAXException;
  
  /**
   * @since 4.1
   */
  public class EmbeddableAttributeHandler extends NamespaceAwareNestedTagHandler {
  
      private static final String EMBEDDED_ATTRIBUTE_TAG = "embedded-attribute";
      private static final String EMBEDDABLE_ATTRIBUTE_OVERRIDE_TAG = "embeddable-attribute-override";
  
      private ObjEntity entity;
  
      private EmbeddedAttribute embeddedAttribute;
  
      public EmbeddableAttributeHandler(NamespaceAwareNestedTagHandler parentHandler, ObjEntity entity) {
          super(parentHandler);
          this.entity = entity;
      }
  
      @Override
      protected boolean processElement(String namespaceURI, String localName, Attributes attributes) throws SAXException {
          switch (localName) {
              case EMBEDDED_ATTRIBUTE_TAG:
                  createEmbeddableAttribute(attributes);
                  return true;
  
              case EMBEDDABLE_ATTRIBUTE_OVERRIDE_TAG:
                  createEmbeddableAttributeOverride(attributes);
                  return true;
          }
  
          return false;
      }
  
      private void createEmbeddableAttribute(Attributes attributes) {
          embeddedAttribute = new EmbeddedAttribute(attributes.getValue("name"));
          embeddedAttribute.setType(attributes.getValue("type"));
          entity.addAttribute(embeddedAttribute);
      }
  
      private void createEmbeddableAttributeOverride(Attributes attributes) {
          embeddedAttribute.addAttributeOverride(attributes.getValue("name"),
                  attributes.getValue("db-attribute-path"));
      }
  }
  