Examples of org.springframework.util.MimeType$SpecificityComparator

org.springframework.util.MimeType
Represents a MIME Type, as originally defined in RFC 2046 and subsequently used in other Internet protocols including HTTP. This class however does not contain support the q-parameters used in HTTP content negotiation. Those can be found in the sub-class {@code org.springframework.http.MediaType} in the {@code spring-web} module.
Consists of a {@linkplain #getType() type} and a {@linkplain #getSubtype() subtype}. Also has functionality to parse media types from a string using {@link #valueOf(String)}. For more parsing options see {@link MimeTypeUtils}. @author Arjen Poutsma @author Juergen Hoeller @author Rossen Stoyanchev @since 4.0 @see MimeTypeUtils

  }


  protected final Message<?> deserializePayloadIfNecessary(Message<?> message) {
    Message<?> messageToSend = message;
    Object originalPayload = message.getPayload();
    MimeType contentType = contentTypeResolver.resolve(message.getHeaders());
    Object payload = deserializePayload(originalPayload, contentType);
    if (payload != null) {
      MessageBuilder<Object> transformed = MessageBuilder.withPayload(payload).copyHeaders(message.getHeaders());
      Object originalContentType = message.getHeaders().get(ORIGINAL_CONTENT_TYPE_HEADER);
      transformed.setHeader(MessageHeaders.CONTENT_TYPE, originalContentType);

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    if (logger.isDebugEnabled()) {
      logger.debug("module " + (isInput ? "input" : "output") + "Type is " + contentTypeString);
    }
    SimpleModule sm = (SimpleModule) module;
    try {
      MimeType contentType = resolveContentType(contentTypeString, module);


      AbstractMessageChannel channel = getChannel(module, isInput);


      CompositeMessageConverter converters = null;
      try {

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  /**
   * Don't need to manipulate message headers. Just return the payload
   */
  @Override
  public Object convertFromInternal(Message<?> message, Class<?> targetClass) {
    MimeType mimeType = contentTypeResolver.resolve(message.getHeaders());
    byte[] converted = null;
    if (mimeType == null || mimeType.getParameter("Charset") == null) {
      converted = ((String) message.getPayload()).getBytes();
    }
    else {
      String encoding = mimeType.getParameter("Charset");
      if (encoding != null) {
        try {
          converted = ((String) message.getPayload()).getBytes(encoding);
        }
        catch (UnsupportedEncodingException e) {

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  /**
   * Don't need to manipulate message headers. Just return payload
   */
  @Override
  public Object convertFromInternal(Message<?> message, Class<?> targetClass) {
    MimeType mimeType = contentTypeResolver.resolve(message.getHeaders());


    String converted = null;


    if (mimeType == null || mimeType.getParameter("Charset") == null) {
      converted = new String((byte[]) message.getPayload());
    }
    else {
      String encoding = mimeType.getParameter("Charset");
      if (encoding != null) {
        try {
          converted = new String((byte[]) message.getPayload(), encoding);
        }
        catch (UnsupportedEncodingException e) {

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  @Test
  public void testPojoSerialization() {
    Message<?> converted = messageBus.serializePayloadIfNecessary(
        new GenericMessage<Foo>(new Foo("bar")),
        MimeTypeUtils.APPLICATION_OCTET_STREAM);
    MimeType mimeType = contentTypeResolver.resolve(converted.getHeaders());
    assertEquals("application", mimeType.getType());
    assertEquals("x-java-object", mimeType.getSubtype());
    assertEquals(Foo.class.getName(), mimeType.getParameter("type"));


    Message<?> reconstructed = messageBus.deserializePayloadIfNecessary(converted);
    assertEquals("bar", ((Foo) reconstructed.getPayload()).getBar());
    assertNull(reconstructed.getHeaders().get(MessageHeaders.CONTENT_TYPE));
  }

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  @Test
  public void testPojoWithXJavaObjectMimeTypeNoType() {
    Message<?> converted = messageBus.serializePayloadIfNecessary(
        new GenericMessage<Foo>(new Foo("bar")),
        MimeTypeUtils.APPLICATION_OCTET_STREAM);
    MimeType mimeType = contentTypeResolver.resolve(converted.getHeaders());
    assertEquals("application", mimeType.getType());
    assertEquals("x-java-object", mimeType.getSubtype());
    assertEquals(Foo.class.getName(), mimeType.getParameter("type"));


    Message<?> reconstructed = messageBus.deserializePayloadIfNecessary(converted);
    assertEquals("bar", ((Foo) reconstructed.getPayload()).getBar());
    assertNull(reconstructed.getHeaders().get(MessageHeaders.CONTENT_TYPE));
  }

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  @Test
  public void testPojoWithXJavaObjectMimeTypeExplicitType() {
    Message<?> converted = messageBus.serializePayloadIfNecessary(
        new GenericMessage<Foo>(new Foo("bar")),
        MimeTypeUtils.APPLICATION_OCTET_STREAM);
    MimeType mimeType = contentTypeResolver.resolve(converted.getHeaders());
    assertEquals("application", mimeType.getType());
    assertEquals("x-java-object", mimeType.getSubtype());
    assertEquals(Foo.class.getName(), mimeType.getParameter("type"));


    Message<?> reconstructed = messageBus.deserializePayloadIfNecessary(converted);
    assertEquals("bar", ((Foo) reconstructed.getPayload()).getBar());
    assertNull(reconstructed.getHeaders().get(MessageHeaders.CONTENT_TYPE));
  }

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  @Test
  public void testTupleSerialization() {
    Tuple payload = TupleBuilder.tuple().of("foo", "bar");
    Message<?> converted = messageBus.serializePayloadIfNecessary(new GenericMessage<Tuple>(payload),
        MimeTypeUtils.APPLICATION_OCTET_STREAM);
    MimeType mimeType = contentTypeResolver.resolve(converted.getHeaders());
    assertEquals("application", mimeType.getType());
    assertEquals("x-java-object", mimeType.getSubtype());
    assertEquals(DefaultTuple.class.getName(), mimeType.getParameter("type"));


    Message<?> reconstructed = messageBus.deserializePayloadIfNecessary(converted);
    assertEquals("bar", ((Tuple) reconstructed.getPayload()).getString("foo"));
    assertNull(reconstructed.getHeaders().get(MessageHeaders.CONTENT_TYPE));
  }

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    assertNull(reconstructed.getHeaders().get(MessageHeaders.CONTENT_TYPE));
  }


  @Test
  public void mimeTypeIsSimpleObject() throws ClassNotFoundException {
    MimeType mt = JavaClassMimeTypeConversion.mimeTypeFromObject(new Object());
    String className = JavaClassMimeTypeConversion.classNameFromMimeType(mt);
    assertEquals(Object.class, Class.forName(className));
  }

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    assertEquals(Object.class, Class.forName(className));
  }


  @Test
  public void mimeTypeIsObjectArray() throws ClassNotFoundException {
    MimeType mt = JavaClassMimeTypeConversion.mimeTypeFromObject(new String[0]);
    String className = JavaClassMimeTypeConversion.classNameFromMimeType(mt);
    assertEquals(String[].class, Class.forName(className));
  }

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