程序包 org.hibernate.type.descriptor.java

类 BlobTypeDescriptor

java.lang.Object

org.hibernate.type.descriptor.java.AbstractTypeDescriptor<Blob>

org.hibernate.type.descriptor.java.BlobTypeDescriptor

所有已实现的接口:

Serializable, BasicJavaDescriptor<Blob>, JavaTypeDescriptor<Blob>

public class BlobTypeDescriptor
extends AbstractTypeDescriptor<Blob>

Descriptor for Blob handling.

Note, blobs really are mutable (their internal state can in fact be mutated). We simply treat them as immutable because we cannot properly check them for changes nor deep copy them.

作者:

Steve Ebersole, Brett Meyer

另请参阅:

序列化表格

嵌套类概要

嵌套类

修饰符和类型	类	说明
static class	BlobTypeDescriptor.BlobMutabilityPlan

字段概要

字段

修饰符和类型	字段	说明
static BlobTypeDescriptor	INSTANCE

构造器概要

构造器

构造器	说明
BlobTypeDescriptor()

方法概要

修饰符和类型	方法	说明
boolean	areEqual(Blob one, Blob another)	Determine if two instances are equal
int	extractHashCode(Blob value)	Extract a proper hash code for this value.
String	extractLoggableRepresentation(Blob value)	Extract a loggable representation of the value.
Blob	fromString(String string)
Comparator<Blob>	getComparator()	Retrieve the natural comparator for this type.
String	toString(Blob value)
<X> X	unwrap(Blob value, Class<X> type, WrapperOptions options)	Unwrap an instance of our handled Java type into the requested type.
<X> Blob	wrap(X value, WrapperOptions options)	Wrap a value as our handled Java type.

从类继承的方法 org.hibernate.type.descriptor.java.AbstractTypeDescriptor

getJavaType, getJavaTypeClass, getMutabilityPlan, unknownUnwrap, unknownWrap

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.hibernate.type.descriptor.java.BasicJavaDescriptor

getJdbcRecommendedSqlType

字段详细资料

INSTANCE

public static final BlobTypeDescriptor INSTANCE

构造器详细资料

BlobTypeDescriptor

public BlobTypeDescriptor()

方法详细资料

extractLoggableRepresentation

public String extractLoggableRepresentation(Blob value)

从接口复制的说明: JavaTypeDescriptor

Extract a loggable representation of the value.

指定者:

extractLoggableRepresentation 在接口中 JavaTypeDescriptor<Blob>

覆盖:

extractLoggableRepresentation 在类中 AbstractTypeDescriptor<Blob>

参数:

value - The value for which to extract a loggable representation.

返回:

The loggable representation

toString

public String toString(Blob value)

fromString

public Blob fromString(String string)

getComparator

public Comparator<Blob> getComparator()

从接口复制的说明: JavaTypeDescriptor

Retrieve the natural comparator for this type.

指定者:

getComparator 在接口中 JavaTypeDescriptor<Blob>

覆盖:

getComparator 在类中 AbstractTypeDescriptor<Blob>

extractHashCode

public int extractHashCode(Blob value)

从接口复制的说明: JavaTypeDescriptor

Extract a proper hash code for this value.

指定者:

extractHashCode 在接口中 JavaTypeDescriptor<Blob>

覆盖:

extractHashCode 在类中 AbstractTypeDescriptor<Blob>

参数:

value - The value for which to extract a hash code.

返回:

The extracted hash code.

areEqual

public boolean areEqual(Blob one,
                        Blob another)

从接口复制的说明: JavaTypeDescriptor

Determine if two instances are equal

指定者:

areEqual 在接口中 JavaTypeDescriptor<Blob>

覆盖:

areEqual 在类中 AbstractTypeDescriptor<Blob>

参数:

one - One instance

another - The other instance

返回:

True if the two are considered equal; false otherwise.

unwrap

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

从接口复制的说明: JavaTypeDescriptor

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

As an example, if this is a JavaTypeDescriptor<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.

类型参数:

X - The conversion type.

参数:

value - The value to unwrap

type - The type as which to unwrap

options - The options

返回:

The unwrapped value.

wrap

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

从接口复制的说明: JavaTypeDescriptor

Wrap a value as our handled Java type.

Intended use is during ResultSet extraction.

类型参数:

X - The conversion type.

参数:

value - The value to wrap.

options - The options

返回:

The wrapped value.