org.apache.hadoop.hdfs.protocol.UnresolvedPathException.java Source code

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Here is the source code for org.apache.hadoop.hdfs.protocol.UnresolvedPathException.java

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/**
 * 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();
    }
}