| /** |
| * 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.hadoop.hdfs.protocol; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.fs.UnresolvedLinkException; |
| import org.apache.hadoop.fs.Path; |
| |
| /** |
| * Thrown when a symbolic link is encountered in a path. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public final class UnresolvedPathException extends UnresolvedLinkException { |
| private static final long serialVersionUID = 1L; |
| private String path; // The path containing the link |
| private String preceding; // The path part preceding the link |
| private String remainder; // The path part following the link |
| private String linkTarget; // The link's target |
| |
| /** |
| * Used by RemoteException to instantiate an UnresolvedPathException. |
| */ |
| public UnresolvedPathException(String msg) { |
| super(msg); |
| } |
| |
| public UnresolvedPathException(String path, String preceding, |
| String remainder, String linkTarget) { |
| this.path = path; |
| this.preceding = preceding; |
| this.remainder = remainder; |
| this.linkTarget = linkTarget; |
| } |
| |
| /** |
| * Return a path with the link resolved with the target. |
| */ |
| public Path getResolvedPath() { |
| // If the path is absolute we cam throw out the preceding part and |
| // just append the remainder to the target, otherwise append each |
| // piece to resolve the link in path. |
| boolean noRemainder = (remainder == null || "".equals(remainder)); |
| Path target = new Path(linkTarget); |
| if (target.isUriPathAbsolute()) { |
| return noRemainder ? target : new Path(target, remainder); |
| } else { |
| return noRemainder |
| ? new Path(preceding, target) |
| : new Path(new Path(preceding, linkTarget), remainder); |
| } |
| } |
| |
| @Override |
| public String getMessage() { |
| String msg = super.getMessage(); |
| if (msg != null) { |
| return msg; |
| } |
| return getResolvedPath().toString(); |
| } |
| } |