content: /*
   * Copyright 2014-2025 Real Logic Limited.
   *
   * 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
   *
   * https://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.agrona.collections;
  
  import java.util.Objects;
  
  /**
   * Mutable reference that is useful for capturing an object reference when using lambdas.
   *
   * @param <T> type of the reference.
   */
  public class MutableReference<T>
  {
      /**
       * For convenient access.
       */
      public T ref;
  
      /**
       * Default constructor.
       */
      public MutableReference()
      {
      }
  
      /**
       * Set the reference at construction.
       *
       * @param ref to be set.
       */
      public MutableReference(final T ref)
      {
          this.ref = ref;
      }
  
      /**
       * Get the current value of the reference.
       *
       * @return the current value of the reference.
       */
      public T get()
      {
          return ref;
      }
  
      /**
       * Set the current value of the reference.
       *
       * @param ref to be set.
       */
      public void set(final T ref)
      {
          this.ref = ref;
      }
  
      /**
       * {@inheritDoc}
       */
      public boolean equals(final Object o)
      {
          if (this == o)
          {
              return true;
          }
  
          if (o == null || getClass() != o.getClass())
          {
              return false;
          }
  
          final MutableReference<?> that = (MutableReference<?>)o;
  
          return Objects.equals(ref, that.ref);
      }
  
      /**
       * {@inheritDoc}
       */
      public int hashCode()
      {
          return ref != null ? ref.hashCode() : 0;
      }
  
      /**
       * {@inheritDoc}
       */
      public String toString()
      {
          return null == ref ? "null" : ref.toString();
      }
  }
  