Class ObjectJavaType

java.lang.Object

org.hibernate.type.descriptor.java.AbstractClassJavaType<Object>

org.hibernate.type.descriptor.java.ObjectJavaType

All Implemented Interfaces:

Serializable, BasicJavaType<Object>, JavaType<Object>

public class ObjectJavaType
extends AbstractClassJavaType<Object>

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface JavaType

JavaType.CoercionContext

Field Summary

Fields

Modifier and Type	Field	Description
static final ObjectJavaType	INSTANCE	Singleton access

Constructor Summary

Constructors

Constructor	Description
ObjectJavaType()

Method Summary

Modifier and Type	Method	Description
Object	cast(Object value)	Apply a simple type cast to the given value, without attempting any sort of coercion or wrapping.
boolean	isInstance(Object value)	Is the given value an instance of the described type?
<X> X	unwrap(Object value, Class<X> type, WrapperOptions options)	Unwrap an instance of our handled Java type into the requested type.
boolean	useObjectEqualsHashCode()	Whether to use Object.equals(Object) and Object.hashCode() or JavaType.areEqual(Object, Object) and JavaType.extractHashCode(Object) for objects of this java type.
<X> Object	wrap(X value, WrapperOptions options)	Wrap a value as our handled Java type.

Methods inherited from class AbstractClassJavaType

areEqual, extractHashCode, extractLoggableRepresentation, getComparator, getJavaType, getJavaTypeClass, getMutabilityPlan, unknownUnwrap, unknownWrap

Methods inherited from class Object

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

Methods inherited from interface BasicJavaType

fromString, getRecommendedJdbcType

Methods inherited from interface JavaType

appendEncodedString, coerce, createJavaType, fromEncodedString, fromEncodedString, getCheckCondition, getDefaultSqlLength, getDefaultSqlPrecision, getDefaultSqlScale, getDefaultValue, getLongSqlLength, getReplacement, getTypeName, isTemporalType, isWider, toString

Field Details

INSTANCE

public static final ObjectJavaType INSTANCE

Singleton access

Constructor Details

ObjectJavaType

public ObjectJavaType()

Method Details

useObjectEqualsHashCode

public boolean useObjectEqualsHashCode()

Description copied from interface: JavaType

Whether to use Object.equals(Object) and Object.hashCode() or JavaType.areEqual(Object, Object) and JavaType.extractHashCode(Object) for objects of this java type. This is useful to avoid mega-morphic callsites.

isInstance

public boolean isInstance(Object value)

Description copied from interface: JavaType

Is the given value an instance of the described type?

Usually just getJavaTypeClass().isInstance(value), but some descriptors need specialized semantics, for example, the descriptors for java.sql.Date, java.sql.Time, and java.sql.Timestamp.

For EntityJavaType, this method handles proxies in a semantically correct way, by checking the entity instance underlying the proxy object.

cast

public Object cast(Object value)

Description copied from interface: JavaType

Apply a simple type cast to the given value, without attempting any sort of coercion or wrapping. This method is provided as a convenient way to avoid an unchecked cast to a type variable. Use javaType.cast(value) instead of (T) value wherever possible.

Usually just getJavaTypeClass().cast(value), but overridden in some cases as an "optimization". This optimization is almost certainly unnecessary, and might even indeed be harmful, since Class.cast() is an intrinsic.

unwrap

public <X> X unwrap(Object value,
 Class<X> type,
 WrapperOptions options)

Description copied from interface: JavaType

Unwrap an instance of our handled Java type into the requested type.

As an example, if this is a JavaType<Integer> and we are asked to unwrap the Integer value as a Long, we would return something like Long.valueOf( value.longValue() ).

Intended use is during PreparedStatement binding.

Type Parameters:

X - The conversion type.

Parameters:

value - The value to unwrap

type - The type as which to unwrap

options - The options

Returns:

The unwrapped value.

wrap

public <X> Object wrap(X value,
 WrapperOptions options)

Description copied from interface: JavaType

Wrap a value as our handled Java type.

Intended use is during ResultSet extraction.

Type Parameters:

X - The conversion type.

Parameters:

value - The value to wrap.

options - The options

Returns:

The wrapped value.