hadoop EnumParam 源码
haddop EnumParam 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/resources/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.hdfs.web.resources;
import java.util.Arrays;
import org.apache.hadoop.util.StringUtils;
abstract class EnumParam<E extends Enum<E>>
extends Param<E, EnumParam.Domain<E>> {
EnumParam(final Domain<E> domain, final E value) {
super(domain, value);
}
/** The domain of the parameter. */
static final class Domain<E extends Enum<E>> extends Param.Domain<E> {
private final Class<E> enumClass;
Domain(String name, final Class<E> enumClass) {
super(name);
this.enumClass = enumClass;
}
@Override
public final String getDomain() {
return Arrays.asList(enumClass.getEnumConstants()).toString();
}
@Override
final E parse(final String str) {
return Enum.valueOf(enumClass, StringUtils.toUpperCase(str));
}
}
}
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