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.fs.viewfs;
020    
021    import org.apache.hadoop.classification.InterfaceAudience;
022    import org.apache.hadoop.classification.InterfaceStability;
023    import 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")
033    public 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    }