SnappyShimImpl.java

/*******************************************************************************
 *
 * Pentaho Big Data
 *
 * Copyright (C) 2002-2013 by Pentaho : http://www.pentaho.com
 *
 *******************************************************************************
 *
 * 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,
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 * See the License for the specific language governing permissions and
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package org.pentaho.hadoop.shim.common;

import org.apache.hadoop.io.compress.SnappyCodec;

public class SnappyShimImpl extends CommonSnappyShim {
  /**
   * Tests whether hadoop-snappy (not to be confused with other java-based snappy implementations such as jsnappy or
   * snappy-java) plus the native snappy libraries are available.
   *
   * @return true if hadoop-snappy is available on the classpath
   */
  public boolean isHadoopSnappyAvailable() {
    ClassLoader cl = Thread.currentThread().getContextClassLoader();
    Thread.currentThread().setContextClassLoader( getClass().getClassLoader() );
    try {
      return SnappyCodec.isNativeCodeLoaded();
    } catch ( Throwable t ) {
      return false;
    } finally {
      Thread.currentThread().setContextClassLoader( cl );
    }
  }
}