001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.reef.io.storage.util; 020 021import org.apache.reef.exception.evaluator.ServiceRuntimeException; 022import org.apache.reef.io.serialization.Deserializer; 023 024import java.io.DataInputStream; 025import java.io.IOException; 026import java.io.InputStream; 027import java.util.Iterator; 028 029public class IntegerDeserializer implements 030 Deserializer<Integer, InputStream> { 031 @Override 032 public Iterable<Integer> create(final InputStream arg) { 033 final DataInputStream dis = new DataInputStream(arg); 034 return new Iterable<Integer>() { 035 036 @Override 037 public Iterator<Integer> iterator() { 038 return new Iterator<Integer>() { 039 040 @Override 041 public void remove() { 042 throw new UnsupportedOperationException(); 043 } 044 045 @Override 046 public Integer next() { 047 try { 048 return dis.readInt(); 049 } catch (final IOException e) { 050 throw new ServiceRuntimeException(e); 051 } 052 } 053 054 @Override 055 public boolean hasNext() { 056 throw new UnsupportedOperationException(); 057 } 058 }; 059 } 060 }; 061 } 062}