org.kie.dmn.feel.marshaller

Class FEELStringMarshaller

java.lang.Object

org.kie.dmn.feel.marshaller.FEELStringMarshaller

All Implemented Interfaces:

FEELMarshaller<String>

public class FEELStringMarshaller
extends Object
implements FEELMarshaller<String>

An implementation of the FEEL marshaller interface that converts FEEL objects into it's string representation and vice versa

Field Summary

Fields

Modifier and Type	Field and Description
static FEELStringMarshaller	INSTANCE

Method Summary

Modifier and Type	Method and Description
String	marshall(Object value) Marshalls the give FEEL value into a String.
Object	unmarshall(Type feelType, String value) Unmarshalls the given string into a FEEL value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final FEELStringMarshaller INSTANCE

Method Detail

marshall

public String marshall(Object value)

Marshalls the give FEEL value into a String. The result is similar to calling the string() function in a FEEL expression, with the difference that a null value is returned as the "null" string instead of the null value itself.

Specified by:

marshall in interface FEELMarshaller<String>

Parameters:

value - the FEEL value to be marshalled

Returns:

the string representation of the value

unmarshall

public Object unmarshall(Type feelType,
                         String value)

Unmarshalls the given string into a FEEL value. IMPORTANT: please note that it is only possible to unmarshall simple values, like strings and numbers. Complex values like lists and contexts don't have enough metadata marshalled in the string to enable them to be unmarshalled.

Specified by:

unmarshall in interface FEELMarshaller<String>

Parameters:

feelType - the expected type of the value to be unmarshalled

value - the marshalled value to unmarshall

Returns:

the value resulting from the unmarshalling of the string

Throws:

UnsupportedOperationException - in case the type is a complex type, i.e. RANGE, FUNCTION, CONTEXT, LIST or UNARY_TEST, the implementation raises the exception.