content: /*
   * Copyright (c) 2013. wyouflf (wyouflf@gmail.com)
   *
   * Licensed 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 com.lidroid.xutils.http.client.multipart.content;
  
  import com.lidroid.xutils.http.client.multipart.MIME;
  import org.apache.http.protocol.HTTP;
  
  import java.io.*;
  import java.nio.charset.Charset;
  
  /**
   * @since 4.0
   */
  public class StringBody extends AbstractContentBody {
  
      private final byte[] content;
      private final Charset charset;
  
      /**
       * @since 4.1
       */
      public static StringBody create(
              final String text,
              final String mimeType,
              final Charset charset) throws IllegalArgumentException {
          try {
              return new StringBody(text, mimeType, charset);
          } catch (UnsupportedEncodingException ex) {
              throw new IllegalArgumentException("Charset " + charset + " is not supported", ex);
          }
      }
  
      /**
       * @since 4.1
       */
      public static StringBody create(
              final String text, final Charset charset) throws IllegalArgumentException {
          return create(text, null, charset);
      }
  
      /**
       * @since 4.1
       */
      public static StringBody create(final String text) throws IllegalArgumentException {
          return create(text, null, null);
      }
  
      /**
       * Create a StringBody from the specified text, mime type and character set.
       *
       * @param text     to be used for the body, not {@code null}
       * @param mimeType the mime type, not {@code null}
       * @param charset  the character set, may be {@code null}, in which case the UTF-8 charset is used
       * @throws java.io.UnsupportedEncodingException
       *
       * @throws IllegalArgumentException if the {@code text} parameter is null
       */
      public StringBody(
              final String text,
              final String mimeType,
              Charset charset) throws UnsupportedEncodingException {
          super(mimeType);
          if (text == null) {
              throw new IllegalArgumentException("Text may not be null");
          }
          if (charset == null) {
              charset = Charset.forName(HTTP.UTF_8);
          }
          this.content = text.getBytes(charset.name());
          this.charset = charset;
      }
  
      /**
       * Create a StringBody from the specified text and character set.
       * The mime type is set to "text/plain".
       *
       * @param text    to be used for the body, not {@code null}
       * @param charset the character set, may be {@code null}, in which case the UTF-8 charset is used
       * @throws java.io.UnsupportedEncodingException
       *
       * @throws IllegalArgumentException if the {@code text} parameter is null
       */
      public StringBody(final String text, final Charset charset) throws UnsupportedEncodingException {
          this(text, "text/plain", charset);
      }
  
      /**
       * Create a StringBody from the specified text.
       * The mime type is set to "text/plain".
       * The hosts default charset is used.
       *
       * @param text to be used for the body, not {@code null}
       * @throws java.io.UnsupportedEncodingException
       *
       * @throws IllegalArgumentException if the {@code text} parameter is null
       */
      public StringBody(final String text) throws UnsupportedEncodingException {
          this(text, "text/plain", null);
      }
  
      public Reader getReader() {
          return new InputStreamReader(
                  new ByteArrayInputStream(this.content),
                  this.charset);
      }
  
      public void writeTo(final OutputStream out) throws IOException {
          if (out == null) {
              throw new IllegalArgumentException("Output stream may not be null");
          }
          InputStream in = new ByteArrayInputStream(this.content);
          byte[] tmp = new byte[4096];
          int l;
          while ((l = in.read(tmp)) != -1) {
              out.write(tmp, 0, l);
              callBackInfo.pos += l;
              if (!callBackInfo.doCallBack(false)) {
                  throw new InterruptedIOException("cancel");
              }
          }
          out.flush();
      }
  
      public String getTransferEncoding() {
          return MIME.ENC_8BIT;
      }
  
      public String getCharset() {
          return this.charset.name();
      }
  
      public long getContentLength() {
          return this.content.length;
      }
  
      public String getFilename() {
          return null;
      }
  
  }
  