public static class Part extends Object
Part
interface is the common base interface for
Messages and BodyParts. Part consists of a set of attributes and a "Content".
Attributes:
The JavaMail API defines a set of standard Part attributes that are considered to be common to most existing Mail systems. These attributes have their own settor and gettor methods. Mail systems may support other Part attributes as well, these are represented as name-value pairs where both the name and value are Strings.
Content:
The data type of the "content" is returned by
the getContentType()
method. The MIME typing system
is used to name data types.
The "content" of a Part is available in various formats:
getDataHandler()
method.
The "content" of a Part is also available through a
javax.activation.DataHandler
object. The DataHandler
object allows clients to discover the operations available on the
content, and to instantiate the appropriate component to perform
those operations.
getInputStream()
method.
Any mail-specific encodings are decoded before this stream is returned.
getContent()
method.
This method returns the "content" as a Java object.
The returned object is of course dependent on the content
itself. In particular, a "multipart" Part's content is always a
Multipart or subclass thereof. That is, getContent()
on a
"multipart" type Part will always return a Multipart (or subclass) object.
writeTo()
method that streams
out its bytestream in mail-safe form suitable for transmission.
This bytestream is typically an aggregation of the Part attributes
and its content's bytestream. Message and BodyPart implement the Part interface. Note that in MIME parlance, Part models an Entity (RFC 2045, Section 2.4).
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