/*

  * 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.writable.kryo;

 import java.io.DataInput;

 import java.io.EOFException;

 import java.io.IOException;

 import java.io.InputStream;

 /**

  * Thin wrapper around DataInput so it can be used as an

  * {@link java.io.InputStream}

  *

  * For use with {@link com.esotericsoftware.kryo.io.Input}

  */

 public class DataInputWrapperStream extends InputStream {

   /** Wrapped DataInput object */

   private DataInput in;

   public void setDataInput(DataInput in) {

     this.in = in;

   }

   @Override

   public int read() throws IOException {

     try {

       return in.readByte() & 0xFF;

     } catch (EOFException e) {

       throw new RuntimeException(

           "Chunked input should never read more than chunked output wrote", e);

     }

   }

   @Override

   public int read(byte[] b, int off, int len) throws IOException {

     try {

       in.readFully(b, off, len);

       return len;

     } catch (EOFException e) {

       throw new RuntimeException(

           "Chunked input should never read more than chunked output wrote", e);

     }

   }

 }