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 */
018package org.apache.hadoop.hdfs.web.resources;
019
020import org.apache.hadoop.fs.Path;
021
022/** Destination path parameter. */
023public class DestinationParam extends StringParam {
024  /** Parameter name. */
025  public static final String NAME = "destination";
026  /** Default parameter value. */
027  public static final String DEFAULT = "";
028
029  private static final Domain DOMAIN = new Domain(NAME, null);
030
031  private static String validate(final String str) {
032    if (str == null || str.equals(DEFAULT)) {
033      return null;
034    }
035    if (!str.startsWith(Path.SEPARATOR)) {
036      throw new IllegalArgumentException("Invalid parameter value: " + NAME
037          + " = \"" + str + "\" is not an absolute path.");
038    }
039    return new Path(str).toUri().getPath();
040  }
041
042  /**
043   * Constructor.
044   * @param str a string representation of the parameter value.
045   */
046  public DestinationParam(final String str) {
047    super(DOMAIN, validate(str));
048  }
049
050  @Override
051  public String getName() {
052    return NAME;
053  }
054}