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The DefaultEXPEvaluator class provides the implementation
of Expression evaluator component. This class exposes the following
APIs: public HashMap<String, Serializable> evaluateExpressions(HashMap<String, String> expressions, Serializable inputData) -
This API provides functionality of evaluating a set of expressions
in a batch. The API accepts a collection of expressions and input
data required to evaluate these expressions and returns a collection
of expression results. The input expressions are provided as a map
where each expression is mapped against a unique key. The result
of API returns a map containing result of the expression mapped
to the key of corresponding expression. If evaluation of any expression
fails, that expression is not added to the result set. However other
expressions are evaluated and their values are added to the result
set.
public Serializable evaluateExpression(String expression, Serializable inputData) -
This API is used to evaluate a single expression. The API expects
an expression and the input data required to evaluate this expression
and returns the computed value of expression.
public void validateExpression(String expression) -
This API validates the syntax of expression. The API throws Exception
if expression syntax is invalid.
Configure the following properties for this bean: variableResolver - This
property maps to a bean capable of resolving variables used in expressions
by the expression evaluation library.
functionMapper - This property maps to a bean capable
of resolving function references in expressions to actual invoke-able
functions.
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