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With the JavaBeans Activation Framework standard extension, developers who use Java technology can take advantage of standard services to determine the type of an arbitrary piece of data, encapsulate access to it, discover the operations available on it, and to instantiate the appropriate bean to perform said operation(s). For example, if a browser obtained a JPEG image, this framework would enable the browser to identify that stream of data as an JPEG image, and from that type, the browser could locate and instantiate an object that could manipulate, or view that image.
The JavaBeans Activation Framework is implemented as a standard extension. Sun provides a royalty-free reference implementation of the JAF software, in binary form, that developers can use to develop JAF technology-enabled applications for any platform that supports version 1.4 or later of the Java 2 Standard Edition. Sun's reference implementation of the JAF standard extension is available for download below.
The JavaBeans Activation Framework 1.1 contains a few small enhancements and bugs fixes. The enhancements are described here and have been approved by the JCP as JSR-925. The primary enhancements are:
The JavaBeans Activation Framework 1.1 requires J2SE 1.4 or greater.
Javabeans Activation Framework 1.1
Bugs fixed in the 1.1 Release:
|<no id>||use context class loader to load data content handlers|
|<no id>||guard against possible NPE when parsing mailcap file|
|<no id>||really make sure input stream gets closed in DataHandler.writeTo|
|4134676||need way to find all known MIME types|
|4786035||API doc: some bugs in javax/activation/MimeType.cmnt|
|4848096||MailcapCommandMap should store *ALL* mailcap entries|
|5090200||CommandMap needs file name to choose proper command on Windows|
|6245613||fix ActivationDataFlavor normalize methods to match DataFlavor|
|6252930||MailcapCommandMap needs support for "fallback" entries in mailcap file|
|6357487||DataHandler.getBean should load class using application's class loader|
Any Java technology-compatible platform running version 1.4 or later of the Java 2 Standard Edition
There is effectively no installation of the JAF. The classes that make up the JAF standard extension are contained in the included Java Archive (JAR) file, "activation.jar". This file can be placed anywhere in your class path.
What's in the JAF release?
Send comments, feedback and bugs to : email@example.com
*As used on this web site, the terms "Java virtual machine" or "JVM" mean a virtual machine for the Java platform.