hadoop UnresolvedPathException 源码
haddop UnresolvedPathException 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/protocol/UnresolvedPathException.java
/**
* 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();
}
}
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