View Javadoc

    1   /*
    2    * Copyright 2012 The Netty Project
    3    *
    4    * The Netty Project licenses this file to you under the Apache License,
    5    * version 2.0 (the "License"); you may not use this file except in compliance
    6    * with the License. You may obtain a copy of the License at:
    7    *
    8    *   http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
    12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
    13   * License for the specific language governing permissions and limitations
    14   * under the License.
    15   */
    16  package org.jboss.netty.util;
    17
    18  /**
    19   * A utility class that provides the convenient shutdown of
    20   * {@link ExternalResourceReleasable}s.
    21   */
    22  public final class ExternalResourceUtil {
    23
    24      /**
    25       * Releases the specified {@link ExternalResourceReleasable}s.
    26       */
    27      public static void release(ExternalResourceReleasable... releasables) {
    28          ExternalResourceReleasable[] releasablesCopy =
    29              new ExternalResourceReleasable[releasables.length];
    30
    31          for (int i = 0; i < releasables.length; i ++) {
    32              if (releasables[i] == null) {
    33                  throw new NullPointerException("releasables[" + i + "]");
    34              }
    35              releasablesCopy[i] = releasables[i];
    36          }
    37
    38          for (ExternalResourceReleasable e: releasablesCopy) {
    39              e.releaseExternalResources();
    40          }
    41      }
    42
    43      private ExternalResourceUtil() {
    44          super();
    45      }
    46  }