br.com.objectos.io.flat.FlatEnumParser Maven / Gradle / Ivy

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/*
 * Copyright 2015 Objectos, Fábrica de Software LTDA.
 *
 * 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 br.com.objectos.io.flat;

import java.util.EnumSet;
import java.util.HashMap;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;

/**
 * @author [email protected] (Marcio Endo)
 */
public class FlatEnumParser & FlatEnum> {

  private final Map map;

  private FlatEnumParser(Map map) {
    this.map = map;
  }

  public static  & FlatEnum> FlatEnumParser of(Class enumType) {
    Map map = new HashMap<>();

    Set set = EnumSet.allOf(enumType);
    for (E value : set) {
      String key = ((FlatEnum) value).flatValue();
      map.put(key, value);
    }

    return new FlatEnumParser<>(map);
  }

  public E parse(String key) {
    if (!map.containsKey(key)) {
      throw new NoSuchElementException("No value found for '" + key + "'");
    }

    return map.get(key);
  }

}