/*
    * ====================================================================
    * 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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.hc.core5.http.nio.entity;
  
  import java.io.IOException;
  import java.nio.ByteBuffer;
  import java.util.concurrent.atomic.AtomicLong;
  
  import org.apache.hc.core5.concurrent.FutureCallback;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.HttpException;
  import org.apache.hc.core5.http.impl.BasicEntityDetails;
  import org.apache.hc.core5.http.nio.AsyncEntityConsumer;
  import org.apache.hc.core5.util.ByteArrayBuffer;
  import org.junit.Assert;
  import org.junit.Test;
  
  public class TestAbstractBinAsyncEntityConsumer {
  
      static private class ByteArrayAsyncEntityConsumer extends AbstractBinAsyncEntityConsumer<byte[]> {
  
          private final ByteArrayBuffer buffer;
  
          public ByteArrayAsyncEntityConsumer() {
              super();
              this.buffer = new ByteArrayBuffer(1024);
          }
  
          @Override
          protected void streamStart(final ContentType contentType) throws HttpException, IOException {
          }
  
          @Override
          protected int capacityIncrement() {
              return Integer.MAX_VALUE;
          }
  
          @Override
          protected void data(final ByteBuffer src, final boolean endOfStream) throws IOException {
              if (src == null) {
                  return;
              }
              if (src.hasArray()) {
                  buffer.append(src.array(), src.arrayOffset() + src.position(), src.remaining());
              } else {
                  while (src.hasRemaining()) {
                      buffer.append(src.get());
                  }
              }
          }
  
          @Override
          protected byte[] generateContent() throws IOException {
              return buffer.toByteArray();
          }
  
          @Override
          public void releaseResources() {
          }
  
      }
  
      @Test
      public void testConsumeData() throws Exception {
  
          final AsyncEntityConsumer<byte[]> consumer = new ByteArrayAsyncEntityConsumer();
  
          final AtomicLong count = new AtomicLong(0);
          consumer.streamStart(new BasicEntityDetails(-1, ContentType.APPLICATION_OCTET_STREAM), new FutureCallback<byte[]>() {
  
              @Override
              public void completed(final byte[] result) {
                  count.incrementAndGet();
              }
 
             @Override
             public void failed(final Exception ex) {
                 count.incrementAndGet();
             }
 
             @Override
             public void cancelled() {
                 count.incrementAndGet();
             }
 
         });
 
         consumer.consume(ByteBuffer.wrap(new byte[]{'1', '2', '3'}));
         consumer.consume(ByteBuffer.wrap(new byte[]{'4', '5'}));
         consumer.consume(ByteBuffer.wrap(new byte[]{}));
 
         Assert.assertEquals(null, consumer.getContent());
         consumer.streamEnd(null);
 
         Assert.assertArrayEquals(new byte[] {'1', '2', '3', '4', '5'}, consumer.getContent());
         Assert.assertEquals(1L, count.longValue());
     }
 
 }