ceph/src/arrow/java/c/src/main/java/org/apache/arrow/c/jni/JniWrapper.java

   1 /*
   2  * Licensed to the Apache Software Foundation (ASF) under one or more
   3  * contributor license agreements.  See the NOTICE file distributed with
   4  * this work for additional information regarding copyright ownership.
   5  * The ASF licenses this file to You under the Apache License, Version 2.0
   6  * (the "License"); you may not use this file except in compliance with
   7  * the License.  You may obtain a copy of the License at
   8  *
   9  *    http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  */
  17
  18 package org.apache.arrow.c.jni;
  19
  20 /**
  21  * JniWrapper for C Data Interface API implementation.
  22  */
  23 public class JniWrapper {
  24   private static final JniWrapper INSTANCE = new JniWrapper();
  25
  26   public static JniWrapper get() {
  27     return INSTANCE;
  28   }
  29
  30   private JniWrapper() {
  31     // A best effort to error on 32-bit systems
  32     String dataModel = System.getProperty("sun.arch.data.model");
  33     if (dataModel != null && dataModel.equals("32")) {
  34       throw new UnsupportedOperationException(
  35           "The Java C Data Interface implementation is currently only supported on 64-bit systems");
  36     }
  37     JniLoader.get().ensureLoaded();
  38   }
  39
  40   public native void releaseSchema(long memoryAddress);
  41
  42   public native void releaseArray(long memoryAddress);
  43
  44   public native void exportSchema(long memoryAddress, PrivateData privateData);
  45
  46   public native void exportArray(long memoryAddress, PrivateData data);
  47 }