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.cayenne.project.extension.info;
  
  import org.apache.cayenne.configuration.ConfigurationNode;
  import org.apache.cayenne.configuration.xml.DataChannelMetaData;
  import org.apache.cayenne.configuration.xml.DataMapHandler;
  import org.apache.cayenne.configuration.xml.DbEntityHandler;
  import org.apache.cayenne.configuration.xml.DbRelationshipHandler;
  import org.apache.cayenne.configuration.xml.EmbeddableHandler;
  import org.apache.cayenne.configuration.xml.NamespaceAwareNestedTagHandler;
  import org.apache.cayenne.configuration.xml.ObjEntityHandler;
  import org.apache.cayenne.configuration.xml.ObjRelationshipHandler;
  import org.apache.cayenne.configuration.xml.ProcedureHandler;
  import org.apache.cayenne.configuration.xml.QueryDescriptorHandler;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.xml.sax.Attributes;
  import org.xml.sax.ContentHandler;
  import org.xml.sax.SAXException;
  
  /**
   * @since 4.1
   */
  class PropertyHandler extends NamespaceAwareNestedTagHandler {
  
      static final String PROPERTY_TAG = "property";
  
      private static final Logger logger = LoggerFactory.getLogger(PropertyHandler.class);
  
      private DataChannelMetaData metaData;
  
      PropertyHandler(NamespaceAwareNestedTagHandler parentHandler, DataChannelMetaData metaData) {
          super(parentHandler);
          setTargetNamespace(InfoExtension.NAMESPACE);
          this.metaData = metaData;
      }
  
      @Override
      protected boolean processElement(String namespaceURI, String localName, Attributes attributes) throws SAXException {
          switch (localName) {
              case PROPERTY_TAG:
                  ConfigurationNode parentObject = getParentObject();
                  String name = attributes.getValue("name");
                  if(parentObject != null) {
                      ObjectInfo info = metaData.get(parentObject, ObjectInfo.class);
                      if(info == null) {
                          info = new ObjectInfo();
                          metaData.add(parentObject, info);
                      }
                      String oldValue = info.put(name, attributes.getValue("value"));
                      if(oldValue != null) {
                          logger.warn("Duplicated property {} for object {}", name, parentObject);
                      }
                  }
                  return true;
          }
  
          return false;
      }
  
      @Override
      protected ContentHandler createChildTagHandler(String namespaceURI, String localName, String qName, Attributes attributes) {
          return super.createChildTagHandler(namespaceURI, localName, qName, attributes);
      }
  
      private ConfigurationNode getParentObject() {
          if(parentHandler instanceof DataMapHandler) {
              return ((DataMapHandler) parentHandler).getDataMap();
          } else if(parentHandler instanceof DbEntityHandler) {
              return ((DbEntityHandler) parentHandler).getEntity();
          } else if(parentHandler instanceof ObjEntityHandler) {
              return ((ObjEntityHandler) parentHandler).getEntity();
          } else if(parentHandler instanceof EmbeddableHandler) {
              return ((EmbeddableHandler) parentHandler).getEmbeddable();
          } else if(parentHandler instanceof QueryDescriptorHandler) {
              return ((QueryDescriptorHandler) parentHandler).getQueryDescriptor();
          } else if(parentHandler instanceof ProcedureHandler) {
              return ((ProcedureHandler) parentHandler).getProcedure();
          } else if(parentHandler instanceof DbRelationshipHandler) {
              return ((DbRelationshipHandler) parentHandler).getDbRelationship();
          } else if(parentHandler instanceof ObjRelationshipHandler) {
              return ((ObjRelationshipHandler) parentHandler).getObjRelationship();
          }
  
          if(parentHandler instanceof NamespaceAwareNestedTagHandler) {
              ContentHandler parentParentHandler = ((NamespaceAwareNestedTagHandler) parentHandler).getParentHandler();
              if(parentParentHandler instanceof DbEntityHandler) {
                  return ((DbEntityHandler) parentParentHandler).getLastAttribute();
              } else if(parentParentHandler instanceof ObjEntityHandler) {
                  return ((ObjEntityHandler) parentParentHandler).getLastAttribute();
              }
          }
          return null;
      }
  }
  