Class DoubleJavaType

java.lang.Object

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

org.hibernate.type.descriptor.java.DoubleJavaType

All Implemented Interfaces:

Serializable, BasicJavaType<Double>, JavaType<Double>, PrimitiveJavaType<Double>

public class DoubleJavaType
extends AbstractClassJavaType<Double>
implements PrimitiveJavaType<Double>

Descriptor for Double handling.

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 DoubleJavaType	INSTANCE

Constructor Summary

Constructors

Constructor	Description
DoubleJavaType()

Method Summary

Modifier and Type	Method	Description
Double	cast(Object value)	Apply a simple type cast to the given value, without attempting any sort of coercion or wrapping.
Double	coerce(Object value)	Coerce the given value to this type, if possible.
Double	fromString(CharSequence string)
Class<Double[]>	getArrayClass()	Get the Java type that describes an array of this type.
long	getDefaultSqlLength(Dialect dialect, JdbcType jdbcType)	The default column length when this Java type is mapped to a SQL data type which is parametrized by length, for example Types.VARCHAR.
int	getDefaultSqlPrecision(Dialect dialect, JdbcType jdbcType)	The default column precision when this Java type is mapped to a SQL data type which is parametrized by precision, for example Types.DECIMAL.
Double	getDefaultValue()	Get this Java type's default value.
Class<?>	getPrimitiveArrayClass()	Get the Java type that describes an array of this type's primitive variant.
Class<?>	getPrimitiveClass()	Retrieve the primitive counterpart to the wrapper type identified by this descriptor
JdbcType	getRecommendedJdbcType(JdbcTypeIndicators indicators)	Obtain the "recommended" SQL type descriptor for this Java type.
boolean	isInstance(Object value)	Is the given value an instance of the described type?
boolean	isWider(JavaType<?> javaType)	Determines if this Java type is wider than the given Java type, that is, if the given type can be safely widened to this type.
String	toString(Double value)
<X> X	unwrap(Double 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> Double	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 JavaType

appendEncodedString, areEqual, createJavaType, extractHashCode, extractLoggableRepresentation, fromEncodedString, fromEncodedString, getCheckCondition, getComparator, getDefaultSqlScale, getJavaType, getJavaTypeClass, getLongSqlLength, getMutabilityPlan, getReplacement, getTypeName, isTemporalType

Field Details

INSTANCE

public static final DoubleJavaType INSTANCE

Constructor Details

DoubleJavaType

public DoubleJavaType()

Method Details

getRecommendedJdbcType

public JdbcType getRecommendedJdbcType(JdbcTypeIndicators indicators)

Description copied from interface: BasicJavaType

Obtain the "recommended" SQL type descriptor for this Java type. Often, but not always, the source of this recommendation is the JDBC specification.

Specified by:

getRecommendedJdbcType in interface BasicJavaType<Double>

Specified by:

getRecommendedJdbcType in interface JavaType<Double>

Parameters:

indicators - Contextual information

Returns:

The recommended SQL type descriptor

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.

Specified by:

useObjectEqualsHashCode in interface JavaType<Double>

toString

public String toString(Double value)

Specified by:

toString in interface JavaType<Double>

fromString

public Double fromString(CharSequence string)

Specified by:

fromString in interface BasicJavaType<Double>

Specified by:

fromString in interface JavaType<Double>

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.

Specified by:

isInstance in interface JavaType<Double>

cast

public Double 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.

Specified by:

cast in interface JavaType<Double>

unwrap

public <X> X unwrap(Double 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.

Specified by:

unwrap in interface JavaType<Double>

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> Double wrap(X value,
 WrapperOptions options)

Description copied from interface: JavaType

Wrap a value as our handled Java type.

Intended use is during ResultSet extraction.

Specified by:

wrap in interface JavaType<Double>

Type Parameters:

X - The conversion type.

Parameters:

value - The value to wrap.

options - The options

Returns:

The wrapped value.

isWider

public boolean isWider(JavaType<?> javaType)

Description copied from interface: JavaType

Determines if this Java type is wider than the given Java type, that is, if the given type can be safely widened to this type.

Specified by:

isWider in interface JavaType<Double>

getPrimitiveClass

public Class<?> getPrimitiveClass()

Description copied from interface: PrimitiveJavaType

Retrieve the primitive counterpart to the wrapper type identified by this descriptor

Specified by:

getPrimitiveClass in interface PrimitiveJavaType<Double>

Returns:

The primitive Java type.

getArrayClass

public Class<Double[]> getArrayClass()

Description copied from interface: PrimitiveJavaType

Get the Java type that describes an array of this type.

Specified by:

getArrayClass in interface PrimitiveJavaType<Double>

getPrimitiveArrayClass

public Class<?> getPrimitiveArrayClass()

Description copied from interface: PrimitiveJavaType

Get the Java type that describes an array of this type's primitive variant.

Specified by:

getPrimitiveArrayClass in interface PrimitiveJavaType<Double>

getDefaultValue

public Double getDefaultValue()

Description copied from interface: JavaType

Get this Java type's default value.

Specified by:

getDefaultValue in interface JavaType<Double>

Returns:

The default value.

getDefaultSqlLength

public long getDefaultSqlLength(Dialect dialect,
 JdbcType jdbcType)

Description copied from interface: JavaType

The default column length when this Java type is mapped to a SQL data type which is parametrized by length, for example Types.VARCHAR.

Specified by:

getDefaultSqlLength in interface JavaType<Double>

Returns:

Size.DEFAULT_LENGTH unless overridden

getDefaultSqlPrecision

public int getDefaultSqlPrecision(Dialect dialect,
 JdbcType jdbcType)

Description copied from interface: JavaType

The default column precision when this Java type is mapped to a SQL data type which is parametrized by precision, for example Types.DECIMAL.

Specified by:

getDefaultSqlPrecision in interface JavaType<Double>

Returns:

Size.DEFAULT_PRECISION unless overridden

coerce

public Double coerce(Object value)

Description copied from interface: JavaType

Coerce the given value to this type, if possible.

This method differs from wrap() in that it allows simple, basic, implicit type conversions, and does not require WrapperOptions. The wrap() method may be thought of as offering explicitly requested type conversions driven by a choice of JdbcType.

An implementation of this method reports failure in one of two ways, by:

• throwing CoercionException, or
• simply returning the given uncoerced value.

Therefore, this method is declared to return Object. In case immediate coercion is required, the following idiom may be used:

javaType.cast(javaType.coerce(value))

Specified by:

coerce in interface JavaType<Double>

Parameters:

value - The value to coerce

Returns:

The coerced value, or the given value if no coercion was possible