org.kie.api.runtime.process

Interface DataTransformer

public interface DataTransformer

Data transformation capabilities used by data input and data output transformation as part of BPMN2 process definition. It allows plugable implementations.

Method Summary

Modifier and Type	Method and Description
Object	compile(String expression, Map<String,Object> parameters) Compiles given expression into reusable unit.
Object	transform(Object expression, Map<String,Object> parameters) Transforms the given expression object (might be compiled expression) using parameters as contextual information (aka bindings) used during evaluation of the expression.

Method Detail

compile

Object compile(String expression,
               Map<String,Object> parameters)

Compiles given expression into reusable unit. This is optional operation and in case it's not supported by given transformed it should return the same expression that was given in the input. If compilation is supported a compiled instance of the expression should be returned.

Parameters:

expression - language specific expression

parameters - parameters e.g. imports defined in the process

Returns:

compiled expression instance or same as given as argument expression

Throws:

RuntimeException - in case of unexpected errors during compilation

transform

Object transform(Object expression,
                 Map<String,Object> parameters)

Transforms the given expression object (might be compiled expression) using parameters as contextual information (aka bindings) used during evaluation of the expression.

Parameters:

expression - expression to evaluate

parameters - binding parameters

Returns:

result of the evaluation

Throws:

RuntimeException - in case of unexpected errors during evaluation of the expression