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
   *
   *    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.carbondata.common;
  
  import java.util.Iterator;
  
  /**
   * CarbonIterator adds default implement for remove. This is required for Java 7.
   * @param <E>
   */
  public abstract class CarbonIterator<E> implements Iterator<E> {
  
    @Override
    public abstract boolean hasNext();
  
    @Override
    public abstract E next();
  
    @Override
    public void remove() {
      throw new UnsupportedOperationException("remove");
    }
  
    /**
     * Initialize the iterator
     */
    public void initialize() {
      // sub classes can overwrite to provide initialize logic to this method
    }
  
    /**
     * Close the resources
     */
    public void close() {
      // sub classes can overwrite to provide close logic to this method
    }
  
  }
  