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, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 019 package org.apache.hadoop.io; 020 021 import java.io.IOException; 022 023 import org.apache.hadoop.classification.InterfaceAudience; 024 import org.apache.hadoop.classification.InterfaceStability; 025 026 /** Thrown by {@link VersionedWritable#readFields(DataInput)} when the 027 * version of an object being read does not match the current implementation 028 * version as returned by {@link VersionedWritable#getVersion()}. */ 029 @InterfaceAudience.Public 030 @InterfaceStability.Stable 031 public class VersionMismatchException extends IOException { 032 033 private byte expectedVersion; 034 private byte foundVersion; 035 036 public VersionMismatchException(byte expectedVersionIn, byte foundVersionIn){ 037 expectedVersion = expectedVersionIn; 038 foundVersion = foundVersionIn; 039 } 040 041 /** Returns a string representation of this object. */ 042 @Override 043 public String toString(){ 044 return "A record version mismatch occured. Expecting v" 045 + expectedVersion + ", found v" + foundVersion; 046 } 047 }