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.kafka.common.utils;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.nio.ByteBuffer;
  
  /**
   * A byte buffer backed input inputStream
   */
  public final class ByteBufferInputStream extends InputStream {
      private final ByteBuffer buffer;
  
      public ByteBufferInputStream(ByteBuffer buffer) {
          this.buffer = buffer;
      }
  
      public int read() {
          if (!buffer.hasRemaining()) {
              return -1;
          }
          return buffer.get() & 0xFF;
      }
  
      public int read(byte[] bytes, int off, int len) {
          if (len == 0) {
              return 0;
          }
          if (!buffer.hasRemaining()) {
              return -1;
          }
  
          len = Math.min(len, buffer.remaining());
          buffer.get(bytes, off, len);
          return len;
      }
  
      @Override
      public int available() throws IOException {
          return buffer.remaining();
      }
  }
  