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LongType (Hibernate API Documentation) - Hibernate 3.2.4 正式版 API 英文文档

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org.hibernate.type
Class LongType

java.lang.Object
  extended byorg.hibernate.type.AbstractType
      extended byorg.hibernate.type.NullableType
          extended byorg.hibernate.type.ImmutableType
              extended byorg.hibernate.type.PrimitiveType
                  extended byorg.hibernate.type.LongType
All Implemented Interfaces:
DiscriminatorType, IdentifierType, LiteralType, Serializable, Type, VersionType
public class LongType
extends PrimitiveType
implements DiscriminatorType, VersionType

long: A type that maps an SQL BIGINT to a Java Long.

Author:
Gavin King
See Also:
Serialized Form

Constructor Summary
LongType()
           
 
Method Summary
 Object fromStringValue(String xml)
           
 Object get(ResultSet rs, String name)
          Get a column value from a result set, without worrying about the possibility of null values.
 Comparator getComparator()
          Get a comparator for version values.
 Serializable getDefaultValue()
           
 String getName()
          Returns the abbreviated name of the type.
 Class getPrimitiveClass()
           
 Class getReturnedClass()
          The class returned by nullSafeGet() methods.
 Object next(Object current, SessionImplementor session)
          Increment the version.
 String objectToSQLString(Object value, Dialect dialect)
          String representation of the value, suitable for embedding in an SQL statement.
 Object seed(SessionImplementor session)
          Generate an initial version.
 void set(PreparedStatement st, Object value, int index)
          Set a parameter value without worrying about the possibility of null values.
 int sqlType()
          A convenience form of NullableType.sqlTypes(org.hibernate.engine.Mapping), returning just a single type value since these are explicitly dealing with single column mappings.
 Object stringToObject(String xml)
          Convert the value from the mapping file to a Java object.
 
Methods inherited from class org.hibernate.type.PrimitiveType
toString
 
Methods inherited from class org.hibernate.type.ImmutableType
deepCopy, isMutable, replace
 
Methods inherited from class org.hibernate.type.NullableType
fromXMLNode, fromXMLString, getColumnSpan, isDirty, isEqual, isEqual, nullSafeGet, nullSafeGet, nullSafeGet, nullSafeGet, nullSafeSet, nullSafeSet, nullSafeSet, nullSafeToString, setToXMLNode, sqlTypes, toColumnNullness, toLoggableString, toXMLString
 
Methods inherited from class org.hibernate.type.AbstractType
assemble, beforeAssemble, compare, disassemble, getHashCode, getHashCode, getSemiResolvedType, hydrate, isAnyType, isAssociationType, isCollectionType, isComponentType, isDirty, isEntityType, isEqual, isModified, isSame, isXMLElement, replace, replaceNode, resolve, semiResolve
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.hibernate.type.Type
assemble, beforeAssemble, compare, deepCopy, disassemble, fromXMLNode, getColumnSpan, getHashCode, getHashCode, getSemiResolvedType, hydrate, isAnyType, isAssociationType, isCollectionType, isComponentType, isDirty, isDirty, isEntityType, isEqual, isEqual, isModified, isMutable, isSame, isXMLElement, nullSafeGet, nullSafeGet, nullSafeSet, nullSafeSet, replace, replace, resolve, semiResolve, setToXMLNode, sqlTypes, toColumnNullness, toLoggableString
 
Methods inherited from interface org.hibernate.type.VersionType
isEqual
 

Constructor Detail

LongType

public LongType()
Method Detail

getDefaultValue

public Serializable getDefaultValue()
Specified by:
getDefaultValue in class PrimitiveType

get

public Object get(ResultSet rs,
                  String name)
           throws SQLException
Description copied from class: NullableType
Get a column value from a result set, without worrying about the possibility of null values. Called from NullableType.nullSafeGet(java.sql.ResultSet, java.lang.String[], org.hibernate.engine.SessionImplementor, java.lang.Object) after nullness checks have been performed.

Specified by:
get in class NullableType
Parameters:
rs - The result set from which to extract the value.
name - The name of the value to extract.
Returns:
The extracted value.
Throws:
SQLException - Indicates problem making the JDBC call(s).

getPrimitiveClass

public Class getPrimitiveClass()
Specified by:
getPrimitiveClass in class PrimitiveType

getReturnedClass

public Class getReturnedClass()
Description copied from interface: Type
The class returned by nullSafeGet() methods. This is used to establish the class of an array of this type.

Specified by:
getReturnedClass in interface Type
Returns:
Class

set

public void set(PreparedStatement st,
                Object value,
                int index)
         throws SQLException
Description copied from class: NullableType
Set a parameter value without worrying about the possibility of null values. Called from NullableType.nullSafeSet(java.sql.PreparedStatement, java.lang.Object, int, boolean[], org.hibernate.engine.SessionImplementor) after nullness checks have been performed.

Specified by:
set in class NullableType
Parameters:
st - The statement into which to bind the parameter value.
value - The parameter value to bind.
index - The position or index at which to bind the param value.
Throws:
SQLException - Indicates problem making the JDBC call(s).

sqlType

public int sqlType()
Description copied from class: NullableType
A convenience form of NullableType.sqlTypes(org.hibernate.engine.Mapping), returning just a single type value since these are explicitly dealing with single column mappings.

Specified by:
sqlType in class NullableType
Returns:
The Types mapping value.

getName

public String getName()
Description copied from interface: Type
Returns the abbreviated name of the type.

Specified by:
getName in interface Type
Returns:
String the Hibernate type name

stringToObject

public Object stringToObject(String xml)
                      throws Exception
Description copied from interface: IdentifierType
Convert the value from the mapping file to a Java object.

Specified by:
stringToObject in interface IdentifierType
Parameters:
xml - the value of discriminator-value or unsaved-value attribute
Returns:
Object
Throws:
Exception

next

public Object next(Object current,
                   SessionImplementor session)
Description copied from interface: VersionType
Increment the version.

Specified by:
next in interface VersionType
Parameters:
session - The session from which this request originates.
current - the current version
Returns:
an instance of the type

seed

public Object seed(SessionImplementor session)
Description copied from interface: VersionType
Generate an initial version.

Specified by:
seed in interface VersionType
Parameters:
session - The session from which this request originates.
Returns:
an instance of the type

getComparator

public Comparator getComparator()
Description copied from interface: VersionType
Get a comparator for version values.

Specified by:
getComparator in interface VersionType
Returns:
The comparator to use to compare different version values.

objectToSQLString

public String objectToSQLString(Object value,
                                Dialect dialect)
                         throws Exception
Description copied from interface: LiteralType
String representation of the value, suitable for embedding in an SQL statement.

Specified by:
objectToSQLString in interface LiteralType
Parameters:
value -
dialect -
Returns:
String the value, as it appears in a SQL query
Throws:
Exception

fromStringValue

public Object fromStringValue(String xml)
Specified by:
fromStringValue in class NullableType
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