IBM Integration Bus, Version 9.0.0.8 Operating Systems: AIX, HP-Itanium, Linux, Solaris, Windows, z/OS

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Casting wildcards in a map

Use the Cast function to redefine parts of the input or output model in a graphical data map.

Your message model schemas might contain one or more wildcards, defined as xsd:any. Wildcards can be used to create a flexible message model that can be redefined when a more detailed definition is required. The process of redefining is called a cast.

To cast a wildcard element by using the Graphical Data Mapping editor, complete the following steps:

With a graphical data map (.map) file open in the Graphical Data Mapping editor, right-click the base element or wildcard (xsd:any) element that you want to cast, then select Cast. The Type Selection dialog opens.
In the Type Selection dialog, select the type that you want to cast to, and then click OK.
The Type Selection dialog lists only those elements and types that are appropriate for the element that you want to cast, and that are contained in a referenced application or library. When casting a base element, the Type Selection dialog lists only derived types.

Note: When you cast a wildcard to multiple types in the input side of a map, the Graphical Data Mapping editor injects an XPath expression to detect which type is present in the input data at run time. Then, invoke the appropriate mapping. However, the Graphical Data Mapping editor only checks the name of the type in each cast. The namespace is ignored. If you cast a wildcard to two types with the same name but in different namespaces and you need to map both types, you must add your own conditional transform that checks the namespace and name part of the xsi:type attribute of the input data.

Your element is cast to the type that you selected, and is displayed in the Graphical Data Mapping editor.

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Last updated Friday, 21 July 2017