/*

  * 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.giraph.utils;

 import com.google.common.collect.UnmodifiableIterator;

 import org.apache.hadoop.io.IntWritable;

 /**

  * {@link UnmodifiableIterator} over a primitive int array

  */

 public class UnmodifiableIntArrayIterator extends

     UnmodifiableIterator<IntWritable> {

   /** Array to iterate over */

   private final int[] intArray;

   /** Offset to array */

   private int offset;

   /**

    * Constructor with array to iterate over.

    *

    * @param intArray Array to iterate over.

    */

   public UnmodifiableIntArrayIterator(int[] intArray) {

     this.intArray = intArray;

     offset = 0;

   }

   @Override

   public boolean hasNext() {

     return offset < intArray.length;

   }

   @Override

   public IntWritable next() {

     return new IntWritable(intArray[offset++]);

   }

 }