EnumParser.java example

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/**
 * Licensed 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.aurora.common.args.parsers;

import java.lang.reflect.Type;

import org.apache.aurora.common.args.ArgParser;
import org.apache.aurora.common.args.Parser;
import org.apache.aurora.common.args.ParserOracle;

/**
 * An {@link Enum} parser that matches enum values via {@link Enum#valueOf(Class, String)}.
 *
 * @author John Sirois
 */
@ArgParser
@SuppressWarnings("unused")
public class EnumParser<T extends Enum<T>> implements Parser<T> {

  @Override
  public T parse(ParserOracle parserOracle, Type type, String raw) throws IllegalArgumentException {
    @SuppressWarnings("unchecked")
    Class<T> enumClass = (Class<T>) type;
    return Enum.valueOf(enumClass, raw);
  }
}