/*
    * ====================================================================
    * 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.http.entity.mime.content;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import org.apache.http.entity.mime.MIME;
  
  /**
   *
   * @since 4.0
   */
  public class FileBody extends AbstractContentBody {
  
      private final File file;
      private final String filename;
      private final String charset;
  
      /**
       * @since 4.1
       */
      public FileBody(final File file,
                      final String filename,
                      final String mimeType,
                      final String charset) {
          super(mimeType);
          if (file == null) {
              throw new IllegalArgumentException("File may not be null");
          }
          this.file = file;
          if (filename != null)
              this.filename = filename;
          else
              this.filename = file.getName();
          this.charset = charset;
      }
  
      /**
       * @since 4.1
       */
      public FileBody(final File file,
                      final String mimeType,
                      final String charset) {
          this(file, null, mimeType, charset);
      }
  
      public FileBody(final File file, final String mimeType) {
          this(file, mimeType, null);
      }
  
      public FileBody(final File file) {
          this(file, "application/octet-stream");
      }
  
      public InputStream getInputStream() throws IOException {
          return new FileInputStream(this.file);
      }
  
      public void writeTo(final OutputStream out) throws IOException {
          if (out == null) {
              throw new IllegalArgumentException("Output stream may not be null");
          }
          InputStream in = new FileInputStream(this.file);
          try {
              byte[] tmp = new byte[4096];
              int l;
              while ((l = in.read(tmp)) != -1) {
                  out.write(tmp, 0, l);
              }
              out.flush();
         } finally {
             in.close();
         }
     }
 
     public String getTransferEncoding() {
         return MIME.ENC_BINARY;
     }
 
     public String getCharset() {
         return charset;
     }
 
     public long getContentLength() {
         return this.file.length();
     }
 
     public String getFilename() {
         return filename;
     }
 
     public File getFile() {
         return this.file;
     }
 
 }