/*
    * ====================================================================
    * 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.io.entity;
  
  import java.io.ByteArrayInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import org.apache.hc.core5.annotation.Contract;
  import org.apache.hc.core5.annotation.ThreadingBehavior;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.util.Args;
  
  /**
   * A self contained, repeatable entity that obtains its content from a byte array.
   *
   * @since 4.0
   */
  @Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
  public class ByteArrayEntity extends AbstractHttpEntity {
  
      private final byte[] b;
      private final int off, len;
  
      /**
       * @since 5.0
       */
      public ByteArrayEntity(
              final byte[] b, final int off, final int len, final ContentType contentType, final String contentEncoding,
              final boolean chunked) {
          super(contentType, contentEncoding, chunked);
          Args.notNull(b, "Source byte array");
          Args.notNegative(off, "offset");
          Args.notNegative(len, "length");
          Args.notNegative(off + len, "off + len");
          Args.check(off <= b.length, "off %s cannot be greater then b.length %s ", off, b.length);
          Args.check(off + len <= b.length, "off + len  %s cannot be less then b.length %s ", off + len, b.length);
          this.b = b;
          this.off = off;
          this.len = len;
      }
  
      /**
       * @since 5.0
       */
      public ByteArrayEntity(
              final byte[] b, final int off, final int len, final ContentType contentType, final String contentEncoding) {
          this(b, off, len, contentType, contentEncoding, false);
      }
  
      /**
       * @since 5.0
       */
      public ByteArrayEntity(
              final byte[] b, final ContentType contentType, final String contentEncoding, final boolean chunked) {
          super(contentType, contentEncoding, chunked);
          Args.notNull(b, "Source byte array");
          this.b = b;
          this.off = 0;
          this.len = this.b.length;
      }
  
      /**
       * @since 5.0
       */
      public ByteArrayEntity(final byte[] b, final ContentType contentType, final String contentEncoding) {
          this(b, contentType, contentEncoding, false);
      }
  
      public ByteArrayEntity(final byte[] b, final ContentType contentType, final boolean chunked) {
          this(b, contentType, null, chunked);
      }
  
     public ByteArrayEntity(final byte[] b, final ContentType contentType) {
         this(b, contentType, null, false);
     }
 
     public ByteArrayEntity(
             final byte[] b, final int off, final int len, final ContentType contentType,  final boolean chunked) {
         this(b, off, len, contentType, null, chunked);
     }
 
     public ByteArrayEntity(final byte[] b, final int off, final int len, final ContentType contentType) {
         this(b, off, len, contentType, null, false);
     }
 
     @Override
     public final boolean isRepeatable() {
         return true;
     }
 
     @Override
     public final long getContentLength() {
         return this.len;
     }
 
     @Override
     public final InputStream getContent() {
         return new ByteArrayInputStream(this.b, this.off, this.len);
     }
 
     @Override
     public final void writeTo(final OutputStream outStream) throws IOException {
         Args.notNull(outStream, "Output stream");
         outStream.write(this.b, this.off, this.len);
         outStream.flush();
     }
 
     @Override
     public final boolean isStreaming() {
         return false;
     }
 
     @Override
     public final void close() throws IOException {
     }
 
 }