Developing Apama Applications > Building Dashboards > Using Dashboard Functions > Creating custom functions > Developing a custom-function library > Implementing getFunctionDescriptors
Implementing getFunctionDescriptors
To create a function descriptor, use the factory class com.apama.dashboard.function.FunctionDescritporFactory. Call createFunctionDescriptor, passing arguments that specify the following:
*The function name that will be used by the Dashboard Builder and by the implementation of evaluateFunction
*The argument names that will be used by the Dashboard Builder
*The argument names that will be used by the implementation of evaluateFunction
*The return type of the function (String, Double, Integer, or com.apama.dashboard.data.ITabularData)
*The names of the returned columns, for functions that return table data
*A text description of the function
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