XML Server Getting Started
Part 3 XMLControl and DW2Java
XMLControl is the most powerful control in the XMLSP suite. It is extremely useful for data entry and reporting; it can be
also used as a data storage for various business objects and XMLSP control as well Treeviews, Menus, Graphs can be all
populated with XMLControl data. DW2Java is the supplementary technology technology that allows automatic conversion of
PowerBuilder DataWindows into XMLControl compliant data source objects.
is a base name for a set of J2EE application server objects which together support the functionality
described in the traditional PowerBuilder's dataobject or Visual Basic Grid control. As a reminder, a PB dataobject is a
metadata to be interpreted by PB run time. It defines how result set is mapped to the database, what it should look like on
screen, what computations, filtering and sorting does it have to go through prior to be displayed.
XMLSP software has its own metadata format. However, XMLSP does not rely on any interpreting engine to enforce the
metadata. Instead, XMLSP software generates several J2EE server side objects per metadata file: one Java Server Page or
servlet to return requested database data in XML format, one XSL stylesheet to format XML data for browser rendering, one
lso known as
objects have life of their own in any J2EE server.
Metadata of any original PB dataobject can be automatically converted to XMLSP format during DW2Java conversion
described below. By the same token conversion utility DW2Java automatically generates and deploys all
in a J2EE server, given PSR of a particular DataWindow. The following is the logical flow of the DW2Java conversion:
Generating XMLControl dataSource from PowerBuilder DataWindow object
XMLSP include special utility DW2JavaPro which performs batch conversion of arbitrary set of dataobjects out of
selected PowerBuilder PBL files. Users pick desired characted encoding, generation template and layout per each
datawindow or accept the project defaults as it is shown in the following illustration:
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