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There is a newer version: 3.10.8

/*
 * Copyright Terracotta, Inc.
 *
 * 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 org.ehcache.internal.store.heap;

import org.ehcache.spi.cache.Store;

class ByRefOnHeapValueHolder extends OnHeapValueHolder {
  private final V value;

  protected ByRefOnHeapValueHolder(V value, long createTime) {
    super(-1, createTime);
    if (value == null) {
      throw new NullPointerException("null value");
    }
    this.value = value;
  }

  protected ByRefOnHeapValueHolder(V value, long creationTime, long expirationTime) {
    this(-1, value, creationTime, expirationTime);
  }

  protected ByRefOnHeapValueHolder(long id, V value, long creationTime, long expirationTime) {
    super(id, creationTime, expirationTime);
    if (value == null) {
      throw new NullPointerException("null value");
    }
    this.value = value;
  }

  protected ByRefOnHeapValueHolder(Store.ValueHolder valueHolder) {
    this(valueHolder.getId(), valueHolder.value(), valueHolder.creationTime(TIME_UNIT), valueHolder.expirationTime(TIME_UNIT));
    this.setLastAccessTime(valueHolder.lastAccessTime(TIME_UNIT), TIME_UNIT);
    this.setHits(valueHolder.hits());
  }

  @Override
  public final V value() {
    return value;
  }

  @Override
  public boolean equals(Object other) {
    if (this == other) return true;
    if (other == null || getClass() != other.getClass()) return false;

    ByRefOnHeapValueHolder that = (ByRefOnHeapValueHolder)other;

    if (!super.equals(that)) return false;
    if (!value.equals(that.value)) return false;

    return true;
  }

  @Override
  public int hashCode() {
    int result = 1;
    result = 31 * result + value.hashCode();
    result = 31 * result + super.hashCode();
    return result;
  }

}