content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.arrow.adapter.orc;
  
  /** Wrapper for orc memory allocated by native code. */
  class OrcMemoryJniWrapper implements AutoCloseable {
  
    private final long nativeInstanceId;
  
    private final long memoryAddress;
  
    private final long size;
  
    private final long capacity;
  
    /**
     * Construct a new instance.
     *
     * @param nativeInstanceId unique id of the underlying memory.
     * @param memoryAddress starting memory address of the underlying memory.
     * @param size size of the valid data.
     * @param capacity allocated memory size.
     */
    OrcMemoryJniWrapper(long nativeInstanceId, long memoryAddress, long size, long capacity) {
      this.nativeInstanceId = nativeInstanceId;
      this.memoryAddress = memoryAddress;
      this.size = size;
      this.capacity = capacity;
    }
  
    /**
     * Return the size of underlying chunk of memory that has valid data.
     *
     * @return valid data size
     */
    long getSize() {
      return size;
    }
  
    /**
     * Return the size of underlying chunk of memory managed by this OrcMemoryJniWrapper.
     *
     * @return underlying memory size
     */
    long getCapacity() {
      return capacity;
    }
  
    /**
     * Return the memory address of underlying chunk of memory.
     *
     * @return memory address
     */
    long getMemoryAddress() {
      return memoryAddress;
    }
  
    @Override
    public void close() {
      release(nativeInstanceId);
    }
  
    private native void release(long id);
  }
  