/*
    * ====================================================================
    * 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.client5.http.entity.mime;
  
  import java.io.ByteArrayInputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.util.List;
  import java.util.Objects;
  import java.util.Set;
  
  import org.apache.hc.core5.function.Supplier;
  import org.apache.hc.core5.http.ContentTooLongException;
  import org.apache.hc.core5.http.ContentType;
  import org.apache.hc.core5.http.Header;
  import org.apache.hc.core5.http.HttpEntity;
  
  class MultipartFormEntity implements HttpEntity {
  
      private final AbstractMultipartFormat multipart;
      private final ContentType contentType;
      private final long contentLength;
  
      MultipartFormEntity(
              final AbstractMultipartFormat multipart,
              final ContentType contentType,
              final long contentLength) {
          super();
          this.multipart = multipart;
          this.contentType = contentType;
          this.contentLength = contentLength;
      }
  
      AbstractMultipartFormat getMultipart() {
          return this.multipart;
      }
  
      @Override
      public boolean isRepeatable() {
          return this.contentLength != -1;
      }
  
      @Override
      public boolean isChunked() {
          return !isRepeatable();
      }
  
      @Override
      public boolean isStreaming() {
          return !isRepeatable();
      }
  
      @Override
      public long getContentLength() {
          return this.contentLength;
      }
  
      @Override
      public String getContentType() {
          return Objects.toString(contentType, null);
      }
  
      @Override
      public String getContentEncoding() {
          return null;
      }
  
      @Override
      public InputStream getContent() throws IOException {
          if (this.contentLength < 0) {
              throw new ContentTooLongException("Content length is unknown");
          } else if (this.contentLength > 25 * 1024) {
             throw new ContentTooLongException("Content length is too long: " + this.contentLength);
         }
         final ByteArrayOutputStream outStream = new ByteArrayOutputStream();
         writeTo(outStream);
         outStream.flush();
         return new ByteArrayInputStream(outStream.toByteArray());
     }
 
     @Override
     public void writeTo(final OutputStream outStream) throws IOException {
         this.multipart.writeTo(outStream);
     }
 
     @Override
     public Supplier<List<? extends Header>> getTrailers() {
         return null;
     }
 
     @Override
     public Set<String> getTrailerNames() {
         return null;
     }
 
     @Override
     public void close() throws IOException {
     }
 
 }