Package org.javers.core.metamodel.type

Class ValueType

java.lang.Object

org.javers.core.metamodel.type.JaversType

org.javers.core.metamodel.type.PrimitiveOrValueType

org.javers.core.metamodel.type.ValueType

All Implemented Interfaces:

CustomComparableType

public class ValueType
extends PrimitiveOrValueType

Value class in a client's domain model is a simple value holder.
JaVers doesn't interact with internal properties of Values and treats them similarly to primitives.

Two Values are compared using Object.equals(Object) so it's highly important to implement it properly by comparing underlying fields.

If you don't control the equals() implementation in a Value class you can still provide a CustomValueComparator and register it with JaversBuilder.registerValue(Class, CustomValueComparator).

It's highly advisable to implement Values as immutable objects, like BigDecimal or LocalDateTime.

Values are serialized to JSON using Gson defaults, if it's not what you need, implement JsonTypeAdapter for custom serialization and register it with JaversBuilder.registerValueTypeAdapter(JsonTypeAdapter).

See Also:

• http://javers.org/documentation/domain-configuration/#ValueType
• https://javers.org/documentation/diff-configuration/#custom-comparators

Field Summary

Fields inherited from class org.javers.core.metamodel.type.JaversType

DEFAULT_TYPE_PARAMETER

Constructor Summary

Constructors

Constructor	Description
ValueType(Type baseJavaType)
ValueType(Type baseJavaType, CustomValueComparator customValueComparator)

Method Summary

Modifier and Type	Method	Description
boolean	canBePrototype()
Class	getBaseJavaClass()
protected Type	getRawDehydratedType()	Type for JSON representation.
boolean	isInstance(Object cdo)
String	valueToString(Object value)

Methods inherited from class org.javers.core.metamodel.type.PrimitiveOrValueType

equals, hasCustomValueComparator, isBoolean, isJsonPrimitive, isNumber, isStringy, prettyPrintBuilder

Methods inherited from class org.javers.core.metamodel.type.JaversType

buildListOfConcreteTypeArguments, equals, getBaseJavaType, getConcreteClassTypeArguments, getName, hashCode, isGenericType, prettyPrint, spawnConstructorArgs, spawnConstructorArgTypes, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

ValueType

public ValueType(Type baseJavaType)

ValueType

public ValueType(Type baseJavaType,
 CustomValueComparator customValueComparator)

Method Details

valueToString

public String valueToString(Object value)

canBePrototype

public boolean canBePrototype()

Specified by:

canBePrototype in class JaversType

isInstance

public boolean isInstance(Object cdo)

Specified by:

isInstance in class JaversType

getRawDehydratedType

protected Type getRawDehydratedType()

Type for JSON representation. For Values it's simply baseJavaType. For ManagedTypes (references to Entities and ValueObjects) it's GlobalId because JaVers serializes references in the 'dehydrated' form.

getBaseJavaClass

public Class getBaseJavaClass()