hadoop EnumParam 源码
haddop EnumParam 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-httpfs/src/main/java/org/apache/hadoop/lib/wsrs/EnumParam.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.lib.wsrs;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.util.StringUtils;
import java.util.Arrays;
@InterfaceAudience.Private
public abstract class EnumParam<E extends Enum<E>> extends Param<E> {
Class<E> klass;
public EnumParam(String name, Class<E> e, E defaultValue) {
super(name, defaultValue);
klass = e;
}
@Override
protected E parse(String str) throws Exception {
return Enum.valueOf(klass, StringUtils.toUpperCase(str));
}
@Override
protected String getDomain() {
return StringUtils.join(",", Arrays.asList(klass.getEnumConstants()));
}
}
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