Execute DataBinding objects

Once your DataBinding is defined, you can "execute" it in a BindingEvaluationContext.

BindingEvaluationContext is the run-time environment and must implement variable resolving. Only this method need to be implemented:

public Object getValue(BindingVariable variable);

Evaluation of DataBinding is typically performed using this code:

DataBinding<String> myBinding = ...; // myBinding has been initialized above
BindingEvaluationContext evaluationContext = ...; // evaluationContext should be somewhere initialized
String value = myBinding.getBindingValue(evaluationContext);

This code computes the value of "person.name".

Supposing that this binding has been declared as settable (here with BindingDefinitionType.GET_SET), we might assign a value to the name of a Person while invoking this code:

DataBinding<String> myBinding = ...; // myBinding has been initialized above
BindingEvaluationContext evaluationContext = ...; // evaluationContext should be somewhere initialized
myBinding.setBindingValue("aName",evaluationContext);

General execution:

DataBinding<String> myBinding = ...; // myBinding has been initialized above
BindingEvaluationContext evaluationContext = ...; // evaluationContext should be somewhere initialized
Object value = myBinding.execute(evaluationContext);

Reference documentation

(overview) Introduction to CONNIE

(advanced) Defining a binding strategy

(programmer) Defining bindable context

(user) Defining DataBinding objects