/*
    * 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
    *
    *     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.apache.commons.jxpath.ri.model.beans;
  
  import org.apache.commons.jxpath.ri.QName;
  import org.apache.commons.jxpath.ri.model.NodePointer;
  
  /**
   * An iterator of attributes of a JavaBean. Returns bean properties as well as the "xml:lang" attribute.
   */
  public class BeanAttributeIterator extends PropertyIterator {
  
      private final NodePointer parent;
      private int position;
      private final boolean includeXmlLang;
  
      /**
       * Constructs a new BeanAttributeIterator.
       *
       * @param parent parent pointer
       * @param qName   name of this bean
       */
      public BeanAttributeIterator(final PropertyOwnerPointer parent, final QName qName) {
          super(parent, qName.getPrefix() == null && (qName.getName() == null || qName.getName().equals("*")) ? null : qName.toString(), false, null);
          this.parent = parent;
          includeXmlLang = qName.getPrefix() != null && qName.getPrefix().equals("xml") && (qName.getName().equals("lang") || qName.getName().equals("*"));
      }
  
      @Override
      public NodePointer getNodePointer() {
          return includeXmlLang && position == 1 ? new LangAttributePointer(parent) : super.getNodePointer();
      }
  
      @Override
      public int getPosition() {
          return position;
      }
  
      @Override
      public boolean setPosition(final int position) {
          this.position = position;
          if (includeXmlLang) {
              return position == 1 || super.setPosition(position - 1);
          }
          return super.setPosition(position);
      }
  }