StringToEnumFunction.java

/*
 * Copyright 2014 mango.jfaster.org
 *
 * The Mango Project 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.jfaster.mango.invoker.function.enums;

import org.jfaster.mango.invoker.RuntimeSetterFunction;
import org.jfaster.mango.util.reflect.TypeToken;

import javax.annotation.Nullable;
import java.lang.reflect.Type;

/**
 * String --> Enum
 *
 * @author ash
 */
public class StringToEnumFunction implements RuntimeSetterFunction<String, Enum> {

  @Nullable
  @Override
  public Enum apply(@Nullable String input, Type runtimeOutputType) {
    if (input == null) {
      return null;
    }
    Class rawType = TypeToken.of(runtimeOutputType).getRawType();
    Enum r = Enum.valueOf(rawType, input);
    return r;
  }

}