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## com.sun.jersey.multipart
Class FormDataBodyPart

    java.lang.Object
      com.sun.jersey.multipart.BodyPart
          com.sun.jersey.multipart.FormDataBodyPart

Direct Known Subclasses:
  FileDataBodyPart

    public class FormDataBodyPart

extends BodyPart

Subclass of `BodyPart` with specialized support for media type `multipart/form-data`. See RFC 2388 for the formal definition of this media type.

For a server side application wishing to process an incoming `multipart/form-data` message, the following features are provided:

- Property accessor to retrieve the control name.
- Property accessor to retrieve the field value for a simple String field.
- Convenience accessor to retrieve the field value after conversion through an appropriate `MessageBodyReader`.

For a client side application wishing to construct an outgoing `multipart/form-data` message, the following features are provided:

- Convenience constructors for named fields with either simple string values, or arbitrary entities and media types.
- Property accessor to set the control name.
- Property accessor to set the field value for a simple String field.
- Convenience accessor to set the media type and value of a "file" field.

Author:
  Craig.McClanahan@Sun.COM, Paul.Sandoz@Sun.Com, imran@smartitengineering.com

Field Summary

Fields inherited from class com.sun.jersey.multipart.BodyPart
`cd`

Constructor Summary
`FormDataBodyPart()` `FormDataBodyPart` with a `mediaType` of `text/plain`.
`FormDataBodyPart(FormDataContentDisposition fdcd, java.lang.Object entity, MediaType mediaType)` Instantiate a named `FormDataBodyPart` with the specified characteristics.
`FormDataBodyPart(FormDataContentDisposition fdcd, java.lang.String value)` Instantiate a named `FormDataBodyPart` with the specified characteristics.
`FormDataBodyPart(MediaType mediaType)` Instantiate an unnamed `FormDataBodyPart` with the specified characteristics.
`FormDataBodyPart(java.lang.Object entity, MediaType mediaType)` Instantiate an unnamed `FormDataBodyPart` with the specified characteristics.
`FormDataBodyPart(java.lang.String name, java.lang.Object entity, MediaType mediaType)` Instantiate a named `FormDataBodyPart` with the specified characteristics.
`FormDataBodyPart(java.lang.String name, java.lang.String value)` Instantiate a named `FormDataBodyPart` with a media type of `text/plain` and String value.

Method Summary
`ContentDisposition` | `getContentDisposition()` Override the behaviour on `BodyPart` to ensure that only instances of `FormDataContentDisposition` can be obtained.
`FormDataContentDisposition` | `getFormDataContentDisposition()` Get the form data content disposition.
`java.lang.String` | `getName()` Get the control name.
`java.lang.String` | `getValue()` Get the field value for this body part.
`
`<T> T`
` | `getValueAs(java.lang.Class<T> clazz)` Get the field value after appropriate conversion to the requested type.
`boolean` | `isSimple()`
`void` | `setContentDisposition(ContentDisposition cd)` Override the behaviour on `BodyPart` to ensure that only instances of `FormDataContentDisposition` can be set.
`void` | `setFormDataContentDisposition(FormDataContentDisposition cd)` Set the form data content disposition.
`void` | `setName(java.lang.String name)` Set the control name.
`void` | `setValue(MediaType mediaType, java.lang.Object value)` Set the field media type and value for this body part.
`void` | `setValue(java.lang.String value)` Set the field value for this body part.

Methods inherited from class com.sun.jersey.multipart.BodyPart
`cleanup, contentDisposition, entity, getEntity, getEntityAs, getHeaders, getMediaType, getParameterizedHeaders, getParent, getProviders, setEntity, setMediaType, setParent, setProviders, type`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### FormDataBodyPart

    public FormDataBodyPart()

  `FormDataBodyPart` with a `mediaType` of `text/plain`.

### FormDataBodyPart

    public FormDataBodyPart(MediaType mediaType)

  Instantiate an unnamed `FormDataBodyPart` with the specified characteristics.

  Parameters:
    `mediaType` - The `MediaType` for this body part

### FormDataBodyPart

    public FormDataBodyPart(java.lang.Object entity,
                            MediaType mediaType)

  Instantiate an unnamed `FormDataBodyPart` with the specified characteristics.

  Parameters:
    `entity` - The entity for this body part
    `mediaType` - The `MediaType` for this body part

### FormDataBodyPart

    public FormDataBodyPart(java.lang.String name,
                            java.lang.String value)

  Instantiate a named `FormDataBodyPart` with a media type of `text/plain` and String value.

  Parameters:
    `name` - the control name for this body part
    `value` - the value for this body part

### FormDataBodyPart

    public FormDataBodyPart(java.lang.String name,
                            java.lang.Object entity,
                            MediaType mediaType)

  Instantiate a named `FormDataBodyPart` with the specified characteristics.

  Parameters:
    `name` - the control name for this body part
    `entity` - the entity for this body part
    `mediaType` - the `MediaType` for this body part

### FormDataBodyPart

    public FormDataBodyPart(FormDataContentDisposition fdcd,
                            java.lang.String value)

  Instantiate a named `FormDataBodyPart` with the specified characteristics.

  Parameters:
    `fdcd` - the content disposition header for this body part.
    `value` - the value for this body part

### FormDataBodyPart

    public FormDataBodyPart(FormDataContentDisposition fdcd,
                            java.lang.Object entity,
                            MediaType mediaType)

  Instantiate a named `FormDataBodyPart` with the specified characteristics.

  Parameters:
    `fdcd` - the content disposition header for this body part.
    `entity` - The entity for this body part
    `mediaType` - The `MediaType` for this body part

Method Detail

### getFormDataContentDisposition

    public FormDataContentDisposition getFormDataContentDisposition()

  Get the form data content disposition.

  Returns:
    the form data content disposition.

### setFormDataContentDisposition

    public void setFormDataContentDisposition(FormDataContentDisposition cd)

  Set the form data content disposition.

  Parameters:
    `cd` - the form data content disposition.

### getContentDisposition

    public ContentDisposition getContentDisposition()

  Override the behaviour on `BodyPart` to ensure that only instances of `FormDataContentDisposition` can be obtained.

  Overrides:
    `getContentDisposition` in class `BodyPart`
  Returns:
    the content disposition.
  Throws:
    `java.lang.IllegalArgumentException` - if the content disposition header cannot be parsed.

### setContentDisposition

    public void setContentDisposition(ContentDisposition cd)

  Override the behaviour on `BodyPart` to ensure that only instances of `FormDataContentDisposition` can be set.

  Overrides:
    `setContentDisposition` in class `BodyPart`
  Parameters:
    `cd` - the content disposition which must be an instance of `FormDataContentDisposition`.
  Throws:
    `java.lang.IllegalArgumentException` - if the content disposition is not an instance of `FormDataContentDisposition`.

### getName

    public java.lang.String getName()

  Get the control name.

  Returns:
    the control name.

### setName

    public void setName(java.lang.String name)

  Set the control name.

  Parameters:
    `name` - the control name.

### getValue

    public java.lang.String getValue()

  Get the field value for this body part. This should be called only on body parts representing simple field values.

  Returns:
    the simple field value.
  Throws:
    `java.lang.IllegalStateException` - if called on a body part with a media type other than `text/plain`

### getValueAs

    public <T> T getValueAs(java.lang.Class<T> clazz)

  Get the field value after appropriate conversion to the requested type. This is useful only when the containing `FormDataMultiPart` instance has been received, which causes the `providers` property to have been set.

  Type Parameters:
    `T` - the type of the field value.
  Parameters:
    `clazz` - Desired class into which the field value should be converted
  Returns:
    the field value
  Throws:
    `java.lang.IllegalArgumentException` - if no `MessageBodyReader` can be found to perform the requested conversion
    `java.lang.IllegalStateException` - if this method is called when the `providers` property has not been set or when the entity instance is not the unconverted content of the body part entity

### setValue

    public void setValue(java.lang.String value)

  Set the field value for this body part. This should be called only on body parts representing simple field values.

  Parameters:
    `value` - the field value
  Throws:
    `java.lang.IllegalStateException` - if called on a body part with a media type other than `text/plain`

### setValue

    public void setValue(MediaType mediaType,
                         java.lang.Object value)

  Set the field media type and value for this body part.

  Parameters:
    `mediaType` - the media type for this field value
    `value` - the field value as a Java object

### isSimple

    public boolean isSimple()

  Returns:
    true if this body part represents a simple, string-based, field value, otherwise false.

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