VoidResult.java

/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.runtime.core.internal;

import java.io.ObjectStreamException;
import java.io.Serializable;

// @Immutable
public final class VoidResult implements Serializable {

  /**
   * Serial version
   */
  private static final long serialVersionUID = -3828573682818093673L;

  private static class VoidResultHolder {

    private static final VoidResult instance = new VoidResult();
  }

  public static VoidResult getInstance() {
    return VoidResultHolder.instance;
  }

  private VoidResult() {
    super();
  }

  private Object readResolve() throws ObjectStreamException {
    return VoidResultHolder.instance;
  }

  @Override
  public boolean equals(Object obj) {
    return obj instanceof VoidResult;
  }

  @Override
  public int hashCode() {
    return 0;
  }

  @Override
  public String toString() {
    return "{VoidResult}";
  }

}