hadoop DestinationParam 源码
haddop DestinationParam 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/resources/DestinationParam.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.web.resources;
import org.apache.hadoop.fs.Path;
/** Destination path parameter. */
public class DestinationParam extends StringParam {
/** Parameter name. */
public static final String NAME = "destination";
/** Default parameter value. */
public static final String DEFAULT = "";
private static final Domain DOMAIN = new Domain(NAME, null);
private static String validate(final String str) {
if (str == null || str.equals(DEFAULT)) {
return null;
}
if (!str.startsWith(Path.SEPARATOR)) {
throw new IllegalArgumentException("Invalid parameter value: " + NAME
+ " = \"" + str + "\" is not an absolute path.");
}
return new Path(str).toUri().getPath();
}
/**
* Constructor.
* @param str a string representation of the parameter value.
*/
public DestinationParam(final String str) {
super(DOMAIN, validate(str));
}
@Override
public String getName() {
return NAME;
}
}
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