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'rapiddweller Common' is an open source Java library forked from Databene Commons by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * 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 com.rapiddweller.common.bean;

import com.rapiddweller.common.ArrayFormat;

import java.util.Arrays;

/**
 * Wraps a plain object or an array and provides equals() and hashCode()
 * that works consistently for both.
 * Created: 09.09.2010 09:53:11
 *
 * @author Volker Bergmann
 * @since 0.5.4
 */
public class ObjectOrArray {

  private final Object realObject;

  /**
   * Instantiates a new Object or array.
   *
   * @param realObject the real object
   */
  public ObjectOrArray(Object realObject) {
    this.realObject = realObject;
  }

  @Override
  public int hashCode() {
    if (realObject.getClass().isArray()) {
      return Arrays.hashCode((Object[]) realObject);
    } else {
      return realObject.hashCode();
    }
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null || getClass() != obj.getClass()) {
      return false;
    }
    ObjectOrArray that = (ObjectOrArray) obj;
    if (this.realObject.getClass().isArray()) {
      return Arrays.equals((Object[]) this.realObject, (Object[]) that.realObject);
    } else {
      return this.realObject.equals(that.realObject);
    }
  }

  @Override
  public String toString() {
    if (realObject.getClass().isArray()) {
      return ArrayFormat.format((Object[]) realObject);
    } else {
      return String.valueOf(realObject);
    }
  }

}