Package no.priv.bang.modeling.modelstore.services

Interface ValueCreator

All Known Implementing Classes:

ValueCreatorProvider

public interface ValueCreator

An interface defining an OSGi service containing methods to convert Boolean, Long, Double and String to Value objects. There are also methods to create a new Propertyset instance and to convert a Propertyset to a complex value (nested object) and to convert a Propertyset to a reference value (a "pointer").

Method Summary

Modifier and Type	Method	Description
Value	fromBoolean(Boolean value)	Convert a Boolean into Value.
Value	fromDouble(Double value)	Convert a Double into Value.
Value	fromLong(Long value)	Convert a Long into Value.
Value	fromString(String value)	Convert a String into Value.
Value	fromValueList(ValueList valueList)
Value	getNil()	Return an object that can be used to represent undefined Value values
Propertyset	getNilPropertyset()	Return an object that can be used to represent undefined Propertyset values
Propertyset	newPropertyset()	Create a new, empty, id-less Propertyset.
Propertyset	newPropertyset(UUID id)	Create a new, empty Propertyset with a given id value
ValueList	newValueList()
Value	toComplexValue(Propertyset propertyset)	Create an embedded object value from a propertyset
Value	toReferenceValue(Propertyset propertyset)	Create a reference value to a propertyset (a "pointer to an object")
Propertyset	unwrapPropertyset(Propertyset propertyset)	If the propertyset is wrapped in a different propertyset, then return the inner propertyset if not, just return the argument as-is.
Propertyset	wrapInModificationTracker(ModificationRecorder recorder, Propertyset propertyset)	Wrap a Propertyset in a new Propertyset that will record all modifications to the propertyset in a ModificationRecorder.

Method Detail

getNilPropertyset

Propertyset getNilPropertyset()

Return an object that can be used to represent undefined Propertyset values

Returns:

an unmodifiable Value object that tests as a Propertyset value

getNil

Value getNil()

Return an object that can be used to represent undefined Value values

Returns:

and unmodifiable Value that represents undefined values

fromBoolean

Value fromBoolean(Boolean value)

Convert a Boolean into Value.

Parameters:

value - a Boolean to convert

Returns:

a Value that will test out as a boolean value

fromLong

Value fromLong(Long value)

Convert a Long into Value.

Parameters:

value - a Long to convert

Returns:

a Value that will test out as a long integer value

fromDouble

Value fromDouble(Double value)

Convert a Double into Value.

Parameters:

value - a Double to convert

Returns:

a Value that will test out as a floating point number value

fromString

Value fromString(String value)

Convert a String into Value.

Parameters:

value - a Double to convert

Returns:

a Value that will test out as a string value

fromValueList

Value fromValueList(ValueList valueList)

newPropertyset

Propertyset newPropertyset()

Create a new, empty, id-less Propertyset. Id-less propertysets are intended as complex properties.

Returns:

a new Propertyset value

newPropertyset

Propertyset newPropertyset(UUID id)

Create a new, empty Propertyset with a given id value

Parameters:

id - the unique identifier of the new Propertyset

Returns:

a new Propertyset value

wrapInModificationTracker

Propertyset wrapInModificationTracker(ModificationRecorder recorder,
                                      Propertyset propertyset)

Wrap a Propertyset in a new Propertyset that will record all modifications to the propertyset in a ModificationRecorder.

Parameters:

recorder - the ModificationRecorder used to track modifications to the Propertyset

propertyset - the wrapped Propertyset

Returns:

a Propertyset that will track all modifications in a ModificationRecorder

unwrapPropertyset

Propertyset unwrapPropertyset(Propertyset propertyset)

If the propertyset is wrapped in a different propertyset, then return the inner propertyset if not, just return the argument as-is.

Parameters:

propertyset - the propertyset to unwrap

Returns:

the unwrapped propertyset

toComplexValue

Value toComplexValue(Propertyset propertyset)

Create an embedded object value from a propertyset

Parameters:

propertyset - the object to put in the value

Returns:

a complex object Value

toReferenceValue

Value toReferenceValue(Propertyset propertyset)

Create a reference value to a propertyset (a "pointer to an object")

Parameters:

propertyset - the object to create a pointer to

Returns:

a "pointer" Value

newValueList

ValueList newValueList()