role-object/src/main/java/com/iluwatar/roleobject/Role.java - master - githubmirror/java-design-patterns

role-object/src/main/java/com/iluwatar/roleobject/Role.java

59 строк2 KB

Ilkka Seppälä

deps: Refactor dependencies (#3224)

29 мар 2025, 20:34

29 мар 2025, 20:340ca162a

/*
 * This project is licensed under the MIT license. Module model-view-viewmodel is using ZK framework licensed under LGPL (see lgpl-3.0.txt).
 *
 * The MIT License
 * Copyright © 2014-2022 Ilkka Seppälä
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.iluwatar.roleobject;

import java.lang.reflect.InvocationTargetException;
import java.util.Optional;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/** Possible roles. */
public enum Role {
  BORROWER(BorrowerRole.class),
  INVESTOR(InvestorRole.class);

  private final Class<? extends CustomerRole> typeCst;

  Role(Class<? extends CustomerRole> typeCst) {
    this.typeCst = typeCst;
  }

  private static final Logger logger = LoggerFactory.getLogger(Role.class);

  /** Get instance. */
  @SuppressWarnings("unchecked")
  public <T extends CustomerRole> Optional<T> instance() {
    var typeCst = this.typeCst;
    try {
      return (Optional<T>) Optional.of(typeCst.getDeclaredConstructor().newInstance());
    } catch (InstantiationException
        | IllegalAccessException
        | NoSuchMethodException
        | InvocationTargetException e) {
      logger.error("error creating an object", e);
    }
    return Optional.empty();
  }
}