/*
    * ====================================================================
    * 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.nio.CharBuffer;
  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.junit.Assert;
  import org.junit.Test;
  
  public class TestAbstractCharAsyncEntityConsumer {
  
      static private class StringBuilderAsyncEntityConsumer extends AbstractCharAsyncEntityConsumer<String> {
  
          private final StringBuilder buffer;
  
          public StringBuilderAsyncEntityConsumer() {
              super();
              this.buffer = new StringBuilder(1024);
          }
  
          @Override
          protected void streamStart(final ContentType contentType) throws HttpException, IOException {
          }
  
          @Override
          protected int capacityIncrement() {
              return Integer.MAX_VALUE;
          }
  
          @Override
          protected void data(final CharBuffer src, final boolean endOfStream) throws IOException {
              buffer.append(src);
          }
  
          @Override
          protected String generateContent() throws IOException {
              return buffer.toString();
          }
  
          @Override
          public void releaseResources() {
              buffer.setLength(0);
          }
  
      }
  
      @Test
      public void testConsumeData() throws Exception {
  
          final AsyncEntityConsumer<String> consumer = new StringBuilderAsyncEntityConsumer();
  
          final AtomicLong count = new AtomicLong(0);
          consumer.streamStart(new BasicEntityDetails(-1, ContentType.TEXT_PLAIN), new FutureCallback<String>() {
  
              @Override
              public void completed(final String 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.assertEquals("12345", consumer.getContent());
         Assert.assertEquals(1L, count.longValue());
     }
 
 }