AttachmentPart (JBoss J2EE API) - JBoss 3.2.7 j2ee API Documentation 英文版文档

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javax.xml.soap
Class AttachmentPart

java.lang.Object
  javax.xml.soap.AttachmentPart

public abstract class AttachmentPart
extends Object

A single attachment to a SOAPMessage object. A SOAPMessage object may contain zero, one, or many AttachmentPart objects. Each AttachmentPart object consists of two parts, application-specific content and associated MIME headers. The MIME headers consists of name/value pairs that can be used to identify and describe the content. An AttachmentPart object must conform to certain standards. 1. It must conform to MIME [RFC2045] standards 2. It MUST contain content 3. The header portion MUST include the following header: Content-Type This header identifies the type of data in the content of an AttachmentPart object and MUST conform to [RFC2045]. The following is an example of a Content-Type header: Content-Type: application/xml The following line of code, in which ap is an AttachmentPart object, sets the header shown in the previous example. ap.setMimeHeader("Content-Type", "application/xml"); There are no restrictions on the content portion of an AttachmentPart object. The content may be anything from a simple plain text object to a complex XML document or image file. An AttachmentPart object is created with the method SOAPMessage.createAttachmentPart. After setting its MIME headers, the AttachmentPart object is added to the message that created it with the method SOAPMessage.addAttachmentPart. The following code fragment, in which m is a SOAPMessage object and contentStringl is a String, creates an instance of AttachmentPart, sets the AttachmentPart object with some content and header information, and adds the AttachmentPart object to the SOAPMessage object. AttachmentPart ap1 = m.createAttachmentPart(); ap1.setContent(contentString1, "text/plain"); m.addAttachmentPart(ap1); The following code fragment creates and adds a second AttachmentPart instance to the same message. jpegData is a binary byte buffer representing the jpeg file. AttachmentPart ap2 = m.createAttachmentPart(); byte[] jpegData = ...; ap2.setContent(new ByteArrayInputStream(jpegData), "image/jpeg"); m.addAttachmentPart(ap2); The getContent method retrieves the contents and header from an AttachmentPart object. Depending on the DataContentHandler objects present, the returned Object can either be a typed Java object corresponding to the MIME type or an InputStream object that contains the content as bytes. String content1 = ap1.getContent(); java.io.InputStream content2 = ap2.getContent(); The method clearContent removes all the content from an AttachmentPart object but does not affect its header information. ap1.clearContent();

Version:: $Revision: 1.2.6.2 $
Author:: Scott.Stark@jboss.org

Constructor Summary

AttachmentPart()


Method Summary

abstract void addMimeHeader(String name, String value)
          Adds a MIME header with the specified name and value to this AttachmentPart object.

abstract void clearContent()
          Clears out the content of this AttachmentPart object.

abstract Iterator getAllMimeHeaders()
          Retrieves all the headers for this AttachmentPart object as an iterator over the MimeHeader objects.

abstract Object getContent()
          Gets the content of this AttachmentPart object as a Java object.

String getContentId()
          Gets the value of the MIME header whose name is "Content-Id".

String getContentLocation()
          Gets the value of the MIME header whose name is "Content-Location".

String getContentType()
          Gets the value of the MIME header whose name is "Content-Type".

abstract javax.activation.DataHandler getDataHandler()
          Gets the DataHandler object for this AttachmentPart object.

abstract Iterator getMatchingMimeHeaders(String[] names)
          Retrieves all MimeHeader objects that match a name in the given array.

abstract String[] getMimeHeader(String name)
          Gets all the values of the header identified by the given String.

abstract Iterator getNonMatchingMimeHeaders(String[] names)
          Retrieves all MimeHeader objects whose name does not match a name in the given array.

abstract int getSize()
          Returns the number of bytes in this AttachmentPart object.

abstract void removeAllMimeHeaders()
          Removes all the MIME header entries.

abstract void removeMimeHeader(String name)
          Removes all MIME headers that match the given name.

abstract void setContent(Object object, String contentType)
          Sets the content of this attachment part to that of the given Object and sets the value of the Content-Type header to the given type.

void setContentId(String contentId)
          Sets the MIME header whose name is "Content-Id" with the given value.

void setContentLocation(String contentLocation)
          Sets the MIME header whose name is "Content-Location" with the given value.

void setContentType(String contentType)
          Sets the MIME header whose name is "Content-Type" with the given value.

abstract void setDataHandler(javax.activation.DataHandler dataHandler)
          Sets the given DataHandler object as the data handler for this AttachmentPart object.

abstract void setMimeHeader(String name, String value)
          Changes the first header entry that matches the given name to the given value, adding a new header if no existing header matches.

Methods inherited from class java.lang.Object

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

Constructor Detail

AttachmentPart

public AttachmentPart()

Method Detail

addMimeHeader

public abstract void addMimeHeader(String name,
                                   String value)

Adds a MIME header with the specified name and value to this AttachmentPart object. Note that RFC822 headers can contain only US-ASCII characters.

Parameters:: name - a String giving the name of the header to be added; value - a String giving the value of the header to be added

clearContent

public abstract void clearContent()

Clears out the content of this AttachmentPart object. The MIME header portion is left untouched.

getAllMimeHeaders

public abstract Iterator getAllMimeHeaders()

Retrieves all the headers for this AttachmentPart object as an iterator over the MimeHeader objects.

Returns:: an Iterator object with all of the Mime headers for this AttachmentPart object

getContent

public abstract Object getContent()
                           throws SOAPException

Gets the content of this AttachmentPart object as a Java object. The type of the returned Java object depends on (1) the DataContentHandler object that is used to interpret the bytes and (2) the Content-Type given in the header. For the MIME content types "text/plain", "text/html" and "text/xml", the DataContentHandler object does the conversions to and from the Java types corresponding to the MIME types. For other MIME types,the DataContentHandler object can return an InputStream object that contains the content data as raw bytes. A SAAJ-compliant implementation must, as a minimum, return a java.lang.String object corresponding to any content stream with a Content-Type value of text/plain, a javax.xml.transform.stream.StreamSource object corresponding to a content stream with a Content-Type value of text/xml, a java.awt.Image object corresponding to a content stream with a Content-Type value of image/gif or image/jpeg. For those content types that an installed DataContentHandler object does not understand, the DataContentHandler object is required to return a java.io.InputStream object with the raw bytes.

Returns:: a Java object with the content of this AttachmentPart object
Throws:: SOAPException - if there is no content set into this AttachmentPart object or if there was a data transformation error

getDataHandler

public abstract javax.activation.DataHandler getDataHandler()
                                                     throws SOAPException

Gets the DataHandler object for this AttachmentPart object.

Returns:: object associated with this AttachmentPart object
Throws:: SOAPException - if there is no data in this AttachmentPart object

getMatchingMimeHeaders

public abstract Iterator getMatchingMimeHeaders(String[] names)

Retrieves all MimeHeader objects that match a name in the given array.

Parameters:: names - a String array with the name(s) of the MIME headers to be returned
Returns:: all of the MIME headers that match one of the names in the given array as an Iterator object

getMimeHeader

public abstract String[] getMimeHeader(String name)

Gets all the values of the header identified by the given String.

Parameters:: name - the name of the header; example: "Content-Type"
Returns:: a String array giving the value for the specified header

getNonMatchingMimeHeaders

public abstract Iterator getNonMatchingMimeHeaders(String[] names)

Retrieves all MimeHeader objects whose name does not match a name in the given array.

Parameters:: names - a String array with the name(s) of the MIME headers not to be returned
Returns:: all of the MIME headers in this AttachmentPart object except those that match one of the names in the given array. The nonmatching MIME headers are returned as an Iterator object.

getSize

public abstract int getSize()
                     throws SOAPException

Returns the number of bytes in this AttachmentPart object.

Returns:: the size of this AttachmentPart object in bytes or -1 if the size cannot be determined
Throws:: SOAPException - if the content of this attachment is corrupted of if there was an exception while trying to determine the size.

removeAllMimeHeaders

public abstract void removeAllMimeHeaders()

Removes all the MIME header entries.

removeMimeHeader

public abstract void removeMimeHeader(String name)

Removes all MIME headers that match the given name.

Parameters:: name - the string name of the MIME header/s to be removed

setContent

public abstract void setContent(Object object,
                                String contentType)

Sets the content of this attachment part to that of the given Object and sets the value of the Content-Type header to the given type. The type of the Object should correspond to the value given for the Content-Type. This depends on the particular set of DataContentHandler objects in use.

Parameters:: object - the Java object that makes up the content for this attachment part; contentType - the MIME string that specifies the type of the content
Throws:: IllegalArgumentException - if the contentType does not match the type of the content object, or if there was no DataContentHandler object for this content object

setDataHandler

public abstract void setDataHandler(javax.activation.DataHandler dataHandler)

Sets the given DataHandler object as the data handler for this AttachmentPart object. Typically, on an incoming message, the data handler is automatically set. When a message is being created and populated with content, the setDataHandler method can be used to get data from various data sources into the message.

Parameters:: dataHandler - the DataHandler object to be set
Throws:: IllegalArgumentException - if there was a problem with the specified DataHandler object

setMimeHeader

public abstract void setMimeHeader(String name,
                                   String value)

Changes the first header entry that matches the given name to the given value, adding a new header if no existing header matches. This method also removes all matching headers but the first. Note that RFC822 headers can only contain US-ASCII characters.

Parameters:: name - a String giving the name of the header for which to search; value - a String giving the value to be set for the header whose name matches the given name
Throws:: IllegalArgumentException - if there was a problem with the specified mime header name or value

getContentId

public String getContentId()

Gets the value of the MIME header whose name is "Content-Id".

Returns:: a String giving the value of the "Content-Id" header or null if there is none

setContentId

public void setContentId(String contentId)

Sets the MIME header whose name is "Content-Id" with the given value.

Parameters:: contentId - a String giving the value of the "Content-Id" header
Throws:: IllegalArgumentException - if there was a problem with the specified contentId value

getContentLocation

public String getContentLocation()

Gets the value of the MIME header whose name is "Content-Location".

Returns:: a String giving the value of the "Content-Location" header or null if there is none

setContentLocation

public void setContentLocation(String contentLocation)

Sets the MIME header whose name is "Content-Location" with the given value.

Throws:: IllegalArgumentException - if there was a problem with the specified content location

getContentType

public String getContentType()

Gets the value of the MIME header whose name is "Content-Type".

Returns:: a String giving the value of the "Content-Type" header or null if there is none

setContentType

public void setContentType(String contentType)

Sets the MIME header whose name is "Content-Type" with the given value.

Parameters:: contentType - a String giving the value of the "Content-Type" header
Throws:: IllegalArgumentException - if there was a problem with the specified content type