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201 lines
8.7 KiB
201 lines
8.7 KiB
/*
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* Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package javax.xml.bind.attachment;
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import javax.activation.DataHandler;
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import javax.xml.bind.Marshaller;
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/**
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* <p>Enable JAXB marshalling to optimize storage of binary data.</p>
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*
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* <p>This API enables an efficient cooperative creation of optimized
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* binary data formats between a JAXB marshalling process and a MIME-based package
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* processor. A JAXB implementation marshals the root body of a MIME-based package,
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* delegating the creation of referenceable MIME parts to
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* the MIME-based package processor that implements this abstraction.</p>
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*
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* <p>XOP processing is enabled when {@link #isXOPPackage()} is true.
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* See {@link #addMtomAttachment(DataHandler, String, String)} for details.
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* </p>
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*
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* <p>WS-I Attachment Profile 1.0 is supported by
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* {@link #addSwaRefAttachment(DataHandler)} being called by the
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* marshaller for each JAXB property related to
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* {http://ws-i.org/profiles/basic/1.1/xsd}swaRef.</p>
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*
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*
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* @author Marc Hadley
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* @author Kohsuke Kawaguchi
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* @author Joseph Fialli
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* @since JAXB 2.0
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*
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* @see Marshaller#setAttachmentMarshaller(AttachmentMarshaller)
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*
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* @see <a href="http://www.w3.org/TR/2005/REC-xop10-20050125/">XML-binary Optimized Packaging</a>
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* @see <a href="http://www.ws-i.org/Profiles/AttachmentsProfile-1.0-2004-08-24.html">WS-I Attachments Profile Version 1.0.</a>
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*/
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public abstract class AttachmentMarshaller {
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/**
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* <p>Consider MIME content <code>data</code> for optimized binary storage as an attachment.
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*
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* <p>
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* This method is called by JAXB marshal process when {@link #isXOPPackage()} is
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* <code>true</code>, for each element whose datatype is "base64Binary", as described in
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* Step 3 in
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* <a href="http://www.w3.org/TR/2005/REC-xop10-20050125/#creating_xop_packages">Creating XOP Packages</a>.
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*
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* <p>
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* The method implementor determines whether <code>data</code> shall be attached separately
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* or inlined as base64Binary data. If the implementation chooses to optimize the storage
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* of the binary data as a MIME part, it is responsible for attaching <code>data</code> to the
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* MIME-based package, and then assigning an unique content-id, cid, that identifies
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* the MIME part within the MIME message. This method returns the cid,
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* which enables the JAXB marshaller to marshal a XOP element that refers to that cid in place
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* of marshalling the binary data. When the method returns null, the JAXB marshaller
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* inlines <code>data</code> as base64binary data.
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*
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* <p>
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* The caller of this method is required to meet the following constraint.
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* If the element infoset item containing <code>data</code> has the attribute
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* <code>xmime:contentType</code> or if the JAXB property/field representing
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* <code>data</code>is annotated with a known MIME type,
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* <code>data.getContentType()</code> should be set to that MIME type.
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*
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* <p>
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* The <code>elementNamespace</code> and <code>elementLocalName</code>
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* parameters provide the
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* context that contains the binary data. This information could
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* be used by the MIME-based package processor to determine if the
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* binary data should be inlined or optimized as an attachment.
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*
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* @param data
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* represents the data to be attached. Must be non-null.
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* @param elementNamespace
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* the namespace URI of the element that encloses the base64Binary data.
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* Can be empty but never null.
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* @param elementLocalName
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* The local name of the element. Always a non-null valid string.
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*
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* @return
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* a valid content-id URI (see <a href="http://www.w3.org/TR/xop10/#RFC2387">RFC 2387</a>) that identifies the attachment containing <code>data</code>.
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* Otherwise, null if the attachment was not added and should instead be inlined in the message.
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*
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* @see <a href="http://www.w3.org/TR/2005/REC-xop10-20050125/">XML-binary Optimized Packaging</a>
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* @see <a href="http://www.w3.org/TR/xml-media-types/">Describing Media Content of Binary Data in XML</a>
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*/
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public abstract String addMtomAttachment(DataHandler data, String elementNamespace, String elementLocalName);
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/**
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* <p>Consider binary <code>data</code> for optimized binary storage as an attachment.
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*
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* <p>Since content type is not known, the attachment's MIME content type must be set to "application/octet-stream".</p>
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*
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* <p>
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* The <code>elementNamespace</code> and <code>elementLocalName</code>
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* parameters provide the
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* context that contains the binary data. This information could
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* be used by the MIME-based package processor to determine if the
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* binary data should be inlined or optimized as an attachment.
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*
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* @param data
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* represents the data to be attached. Must be non-null. The actual data region is
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* specified by <tt>(data,offset,length)</tt> tuple.
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*
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* @param offset
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* The offset within the array of the first byte to be read;
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* must be non-negative and no larger than array.length
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*
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* @param length
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* The number of bytes to be read from the given array;
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* must be non-negative and no larger than array.length
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*
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* @param mimeType
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* If the data has an associated MIME type known to JAXB, that is passed
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* as this parameter. If none is known, "application/octet-stream".
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* This parameter may never be null.
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*
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* @param elementNamespace
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* the namespace URI of the element that encloses the base64Binary data.
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* Can be empty but never null.
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*
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* @param elementLocalName
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* The local name of the element. Always a non-null valid string.
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*
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* @return content-id URI, cid, to the attachment containing
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* <code>data</code> or null if data should be inlined.
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*
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* @see #addMtomAttachment(DataHandler, String, String)
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*/
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public abstract String addMtomAttachment(byte[] data, int offset, int length, String mimeType, String elementNamespace, String elementLocalName);
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/**
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* <p>Read-only property that returns true if JAXB marshaller should enable XOP creation.</p>
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*
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* <p>This value must not change during the marshalling process. When this
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* value is true, the <code>addMtomAttachment(...)</code> method
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* is invoked when the appropriate binary datatypes are encountered by
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* the marshal process.</p>
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*
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* <p>Marshaller.marshal() must throw IllegalStateException if this value is <code>true</code>
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* and the XML content to be marshalled violates Step 1 in
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* <a href="http://www.w3.org/TR/2005/REC-xop10-20050125/#creating_xop_packages">Creating XOP Pacakges</a>
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* http://www.w3.org/TR/2005/REC-xop10-20050125/#creating_xop_packages.
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* <i>"Ensure the Original XML Infoset contains no element information item with a
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* [namespace name] of "http://www.w3.org/2004/08/xop/include" and a [local name] of Include"</i>
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*
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* <p>When this method returns true and during the marshal process
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* at least one call to <code>addMtomAttachment(...)</code> returns
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* a content-id, the MIME-based package processor must label the
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* root part with the application/xop+xml media type as described in
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* Step 5 of
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* <a href="http://www.w3.org/TR/2005/REC-xop10-20050125/#creating_xop_packages">Creating XOP Pacakges</a>.<p>
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*
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* @return true when MIME context is a XOP Package.
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*/
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public boolean isXOPPackage() { return false; }
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/**
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* <p>Add MIME <code>data</code> as an attachment and return attachment's content-id, cid.</p>
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*
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* <p>
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* This method is called by JAXB marshal process for each element/attribute typed as
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* {http://ws-i.org/profiles/basic/1.1/xsd}swaRef. The MIME-based package processor
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* implementing this method is responsible for attaching the specified data to a
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* MIME attachment, and generating a content-id, cid, that uniquely identifies the attachment
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* within the MIME-based package.
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*
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* <p>Caller inserts the returned content-id, cid, into the XML content being marshalled.</p>
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*
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* @param data
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* represents the data to be attached. Must be non-null.
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* @return
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* must be a valid URI used as cid. Must satisfy Conformance Requirement R2928 from
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* <a href="http://www.ws-i.org/Profiles/AttachmentsProfile-1.0-2004-08-24.html#Referencing_Attachments_from_the_SOAP_Envelope">WS-I Attachments Profile Version 1.0.</a>
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*/
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public abstract String addSwaRefAttachment(DataHandler data);
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}
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