org.springframework.http.converter

## Class ByteArrayHttpMessageConverter

- java.lang.Object
- - org.springframework.http.converter.AbstractHttpMessageConverter<byte[]>
  - - org.springframework.http.converter.ByteArrayHttpMessageConverter

- All Implemented Interfaces:
    HttpMessageConverter<byte[]>

      public class ByteArrayHttpMessageConverter
      extends AbstractHttpMessageConverter<byte[]>

  Implementation of `HttpMessageConverter` that can read and write byte arrays.

  By default, this converter supports all media types (`&#42;&#47;&#42;`), and writes with a `Content-Type` of `application/octet-stream`. This can be overridden by setting the `supportedMediaTypes` property.

  Since:
    3.0
  Author:
    Arjen Poutsma

- - ### Field Summary

    - ### Fields inherited from class org.springframework.http.converter.AbstractHttpMessageConverter

      `logger`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `ByteArrayHttpMessageConverter()` Creates a new instance of the `ByteArrayHttpMessageConverter`.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected Long` | `getContentLength(byte[] bytes, MediaType contentType)` Returns the content length for the given type.
    `byte[]` | `readInternal(Class<? extends byte[]> clazz, HttpInputMessage inputMessage)` Abstract template method that reads the actual object.
    `boolean` | `supports(Class<?> clazz)` Indicates whether the given class is supported by this converter.
    `protected void` | `writeInternal(byte[] bytes, HttpOutputMessage outputMessage)` Abstract template method that writes the actual body.

    - ### Methods inherited from class org.springframework.http.converter.AbstractHttpMessageConverter

      `canRead, canRead, canWrite, canWrite, getDefaultContentType, getSupportedMediaTypes, read, setSupportedMediaTypes, write`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### ByteArrayHttpMessageConverter

          public ByteArrayHttpMessageConverter()

      Creates a new instance of the `ByteArrayHttpMessageConverter`.

  - ### Method Detail

    - #### supports

          public boolean supports(Class<?> clazz)

      Description copied from class: `AbstractHttpMessageConverter`
      Indicates whether the given class is supported by this converter.
      Specified by:
        `supports` in class `AbstractHttpMessageConverter<byte[]>`
      Parameters:
        `clazz` - the class to test for support
      Returns:
        `true` if supported; `false` otherwise

    - #### readInternal

          public byte[] readInternal(Class<? extends byte[]> clazz,
                                     HttpInputMessage inputMessage)
                              throws IOException

      Description copied from class: `AbstractHttpMessageConverter`
      Abstract template method that reads the actual object. Invoked from `AbstractHttpMessageConverter.read(java.lang.Class<? extends T>, org.springframework.http.HttpInputMessage)`.
      Specified by:
        `readInternal` in class `AbstractHttpMessageConverter<byte[]>`
      Parameters:
        `clazz` - the type of object to return
        `inputMessage` - the HTTP input message to read from
      Returns:
        the converted object
      Throws:
        `IOException` - in case of I/O errors

    - #### getContentLength

          protected Long getContentLength(byte[] bytes,
                                          MediaType contentType)

      Description copied from class: `AbstractHttpMessageConverter`
      Returns the content length for the given type.

      By default, this returns `null`, meaning that the content length is unknown. Can be overridden in subclasses.

      Overrides:
        `getContentLength` in class `AbstractHttpMessageConverter<byte[]>`
      Parameters:
        `bytes` - the type to return the content length for
      Returns:
        the content length, or `null` if not known

    - #### writeInternal

          protected void writeInternal(byte[] bytes,
                                       HttpOutputMessage outputMessage)
                                throws IOException

      Description copied from class: `AbstractHttpMessageConverter`
      Abstract template method that writes the actual body. Invoked from `AbstractHttpMessageConverter.write(T, org.springframework.http.MediaType, org.springframework.http.HttpOutputMessage)`.
      Specified by:
        `writeInternal` in class `AbstractHttpMessageConverter<byte[]>`
      Parameters:
        `bytes` - the object to write to the output message
        `outputMessage` - the message to write to
      Throws:
        `IOException` - in case of I/O errors