Module jakarta.xml.bind

Package jakarta.xml.bind.attachment

Class AttachmentUnmarshaller

java.lang.Object

jakarta.xml.bind.attachment.AttachmentUnmarshaller

public abstract class AttachmentUnmarshaller
extends Object

Enables Jakarta XML Binding unmarshalling of a root document containing optimized binary data formats.

This API enables an efficient cooperative processing of optimized binary data formats between a Jakarta XML Binding implementation and MIME-based package processor (MTOM/XOP and WS-I AP 1.0). Jakarta XML Binding unmarshals the body of a package, delegating the understanding of the packaging format being used to a MIME-based package processor that implements this abstract class.

This abstract class identifies if a package requires XOP processing, isXOPPackage() and provides retrieval of binary content stored as attachments by content-id.

Identifying the content-id, cid, to pass to getAttachment*(String cid)

• For XOP processing, the infoset representation of the cid is described in step 2a in Section 3.2 Interpreting XOP Packages
• For WS-I AP 1.0, the cid is identified as an element or attribute of type ref:swaRef specified in Section 4.4 Referencing Attachments from the SOAP Envelope

Since:

1.6, JAXB 2.0

See Also:

• Unmarshaller.setAttachmentUnmarshaller(AttachmentUnmarshaller)
• XML-binary Optimized Packaging
• WS-I Attachments Profile Version 1.0.
• Describing Media Content of Binary Data in XML

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AttachmentUnmarshaller()	Do-nothing constructor for the derived classes.

Method Summary

Modifier and Type	Method	Description
abstract byte[]	getAttachmentAsByteArray(String cid)	Retrieve the attachment identified by content-id, cid, as a byte[].
abstract DataHandler	getAttachmentAsDataHandler(String cid)	Lookup MIME content by content-id, cid, and return as a DataHandler.
boolean	isXOPPackage()	Read-only property that returns true if Jakarta XML Binding unmarshaller needs to perform XOP processing.

Methods inherited from class java.lang.Object

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

Constructor Details

AttachmentUnmarshaller

protected AttachmentUnmarshaller()

Do-nothing constructor for the derived classes.

Method Details

getAttachmentAsDataHandler

public abstract DataHandler getAttachmentAsDataHandler(String cid)

Lookup MIME content by content-id, cid, and return as a DataHandler.

The returned DataHandler instance must be configured to meet the following required mapping constaint.

Required Mappings between MIME and Java Types

MIME Type	Java Type
DataHandler.getContentType()	instanceof DataHandler.getContent()
image/gif	java.awt.Image
image/jpeg	java.awt.Image
text/xml or application/xml	javax.xml.transform.Source

Note that it is allowable to support additional mappings.

Parameters:

cid - It is expected to be a valid lexical form of the XML Schema xs:anyURI datatype. If isXOPPackage()==true, it must be a valid URI per the cid: URI scheme (see RFC 2387)

Returns:

a DataHandler that represents the MIME attachment.

Throws:

IllegalArgumentException - if the attachment for the given cid is not found.

getAttachmentAsByteArray

public abstract byte[] getAttachmentAsByteArray(String cid)

Retrieve the attachment identified by content-id, cid, as a byte[].

Parameters:

cid - It is expected to be a valid lexical form of the XML Schema xs:anyURI datatype. If isXOPPackage()==true, it must be a valid URI per the cid: URI scheme (see RFC 2387)

Returns:

byte[] representation of attachment identified by cid.

Throws:

IllegalArgumentException - if the attachment for the given cid is not found.

isXOPPackage

public boolean isXOPPackage()

Read-only property that returns true if Jakarta XML Binding unmarshaller needs to perform XOP processing.

This method returns true when the constraints specified in Identifying XOP Documents are met. This value must not change during the unmarshalling process.

Returns:

true when MIME context is a XOP Document.