Interface Pool

systemlib/src/main/java/android/util/Pools.java:10–25

Interface for managing a pool of objects. @param The pooled type.

   * @param <T> The pooled type.
   */
  public static interface Pool<T> {

    /**
     * @return An instance from the pool if such, null otherwise.
     */
    public T acquire();

    /**
     * Release an instance to the pool.
     *
     * @param instance The instance to release.
     * @return Whether the instance was put in the pool.
     * @throws IllegalStateException If the instance is already in the pool.
     */
    public boolean release(T instance);
  }

  private Pools() {
    /* do nothing - hiding constructor */