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
019package org.apache.hadoop.fs.viewfs;
020
021import org.apache.hadoop.classification.InterfaceAudience;
022import org.apache.hadoop.classification.InterfaceStability;
023import org.apache.hadoop.fs.Path;
024
025/**
026 * NotInMountpointException extends the UnsupportedOperationException.
027 * Exception class used in cases where the given path is not mounted 
028 * through viewfs.
029 */
030@InterfaceAudience.Public
031@InterfaceStability.Evolving /*Evolving for a release,to be changed to Stable */
032@SuppressWarnings("serial")
033public class NotInMountpointException extends UnsupportedOperationException {
034    final String msg;
035
036    public NotInMountpointException(Path path, String operation) {
037      msg = operation + " on path `" + path + "' is not within a mount point";
038    }
039
040    public NotInMountpointException(String operation) {
041      msg = operation + " on empty path is invalid";
042    }
043
044    @Override
045    public String getMessage() {
046      return msg;
047    }
048}