org.hibernate.type
Class CustomType

java.lang.Object
  extended by org.hibernate.type.AbstractType
      extended by org.hibernate.type.CustomType
All Implemented Interfaces:
Serializable, BasicType, DiscriminatorType, IdentifierType, LiteralType, StringRepresentableType, Type, VersionType

public class CustomType
extends AbstractType
implements IdentifierType, DiscriminatorType, VersionType, BasicType, StringRepresentableType

Adapts UserType to the generic Type interface, in order to isolate user code from changes in the internal Type contracts.

See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.hibernate.type.AbstractType
LEGACY_DEFAULT_SIZE, LEGACY_DICTATED_SIZE
 
Constructor Summary
CustomType(UserType userType)
           
CustomType(UserType userType, String[] registrationKeys)
           
 
Method Summary
 Object assemble(Serializable cached, SessionImplementor session, Object owner)
          Reconstruct the object from its disassembled state.
 Object deepCopy(Object value, SessionFactoryImplementor factory)
          Return a deep copy of the persistent state, stopping at entities and at collections.
 Size[] defaultSizes(Mapping mapping)
          Defines the column sizes to use according to this type if the user did not explicitly say (and if no Type.dictatedSizes(org.hibernate.engine.spi.Mapping) were given).
 Size[] dictatedSizes(Mapping mapping)
          Return the column sizes dictated by this type.
 Serializable disassemble(Object value, SessionImplementor session, Object owner)
          Return a disassembled representation of the object.
 Object fromStringValue(String string)
          Consume the given string representation back into this types java form.
 Object fromXMLNode(org.dom4j.Node xml, Mapping factory)
          Parse the XML representation of an instance.
 Object fromXMLString(String xml, Mapping factory)
           
 int getColumnSpan(Mapping session)
          How many columns are used to persist this type.
 Comparator getComparator()
          Get a comparator for version values.
 int getHashCode(Object x)
          Get a hash code, consistent with persistence "equality".
 String getName()
          Returns the abbreviated name of the type.
 String[] getRegistrationKeys()
          Get the names under which this type should be registered in the type registry.
 Class getReturnedClass()
          The class returned by Type.nullSafeGet(java.sql.ResultSet, java.lang.String[], org.hibernate.engine.spi.SessionImplementor, java.lang.Object) methods.
 UserType getUserType()
           
 boolean isDirty(Object old, Object current, boolean[] checkable, SessionImplementor session)
          Should the parent be considered dirty, given both the old and current value?
 boolean isEqual(Object x, Object y)
          Compare two instances of the class mapped by this type for persistence "equality" (equality of persistent state).
 boolean isMutable()
          Are objects of this type mutable.
 Object next(Object current, SessionImplementor session)
          Increment the version.
 Object nullSafeGet(ResultSet rs, String[] names, SessionImplementor session, Object owner)
          Extract a value of the mapped class from the JDBC result set.
 Object nullSafeGet(ResultSet rs, String columnName, SessionImplementor session, Object owner)
          Extract a value of the mapped class from the JDBC result set.
 void nullSafeSet(PreparedStatement st, Object value, int index, boolean[] settable, SessionImplementor session)
          Bind a value represented by an instance of the mapped class to the JDBC prepared statement, ignoring some columns as dictated by the 'settable' parameter.
 void nullSafeSet(PreparedStatement st, Object value, int index, SessionImplementor session)
          Bind a value represented by an instance of the mapped class to the JDBC prepared statement.
 String objectToSQLString(Object value, Dialect dialect)
          Convert the value into a string representation, suitable for embedding in an SQL statement as a literal.
 Object replace(Object original, Object target, SessionImplementor session, Object owner, Map copyCache)
          During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging.
 Object seed(SessionImplementor session)
          Generate an initial version.
 void setToXMLNode(org.dom4j.Node node, Object value, SessionFactoryImplementor factory)
          A representation of the value to be embedded in an XML element.
 int[] sqlTypes(Mapping pi)
          Return the JDBC types codes (per Types) for the columns mapped by this type.
 Object stringToObject(String xml)
          Convert the value from the mapping file to a Java object.
 boolean[] toColumnNullness(Object value, Mapping mapping)
          Given an instance of the type, return an array of boolean, indicating which mapped columns would be null.
 String toLoggableString(Object value, SessionFactoryImplementor factory)
          Generate a representation of the value for logging purposes.
 String toString(Object value)
          Render the value to the string representation.
 String toXMLString(Object value, SessionFactoryImplementor factory)
           
 
Methods inherited from class org.hibernate.type.AbstractType
beforeAssemble, compare, 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
beforeAssemble, compare, getHashCode, getSemiResolvedType, hydrate, isAnyType, isAssociationType, isCollectionType, isComponentType, isDirty, isEntityType, isEqual, isModified, isSame, isXMLElement, replace, resolve, semiResolve
 

Constructor Detail

CustomType

public CustomType(UserType userType)
           throws MappingException
Throws:
MappingException

CustomType

public CustomType(UserType userType,
                  String[] registrationKeys)
           throws MappingException
Throws:
MappingException
Method Detail

getUserType

public UserType getUserType()

getRegistrationKeys

public String[] getRegistrationKeys()
Description copied from interface: BasicType
Get the names under which this type should be registered in the type registry.

Specified by:
getRegistrationKeys in interface BasicType
Returns:
The keys under which to register this type.

sqlTypes

public int[] sqlTypes(Mapping pi)
Description copied from interface: Type
Return the JDBC types codes (per Types) for the columns mapped by this type.

NOTE: The number of elements in this array matches the return from Type.getColumnSpan(org.hibernate.engine.spi.Mapping).

Specified by:
sqlTypes in interface Type
Parameters:
pi - The mapping object :/
Returns:
The JDBC type codes.

dictatedSizes

public Size[] dictatedSizes(Mapping mapping)
                     throws MappingException
Description copied from interface: Type
Return the column sizes dictated by this type. For example, the mapping for a char/Character would have a dictated length limit of 1; for a string-based UUID would have a size limit of 36; etc.

NOTE: The number of elements in this array matches the return from Type.getColumnSpan(org.hibernate.engine.spi.Mapping).

Specified by:
dictatedSizes in interface Type
Parameters:
mapping - The mapping object :/
Returns:
The dictated sizes.
Throws:
MappingException - Generally indicates an issue accessing the passed mapping object.

defaultSizes

public Size[] defaultSizes(Mapping mapping)
                    throws MappingException
Description copied from interface: Type
Defines the column sizes to use according to this type if the user did not explicitly say (and if no Type.dictatedSizes(org.hibernate.engine.spi.Mapping) were given).

NOTE: The number of elements in this array matches the return from Type.getColumnSpan(org.hibernate.engine.spi.Mapping).

Specified by:
defaultSizes in interface Type
Parameters:
mapping - The mapping object :/
Returns:
The default sizes.
Throws:
MappingException - Generally indicates an issue accessing the passed mapping object.

getColumnSpan

public int getColumnSpan(Mapping session)
Description copied from interface: Type
How many columns are used to persist this type. Always the same as sqlTypes(mapping).length

Specified by:
getColumnSpan in interface Type
Parameters:
session - The mapping object :/
Returns:
The number of columns

getReturnedClass

public Class getReturnedClass()
Description copied from interface: Type
The class returned by Type.nullSafeGet(java.sql.ResultSet, java.lang.String[], org.hibernate.engine.spi.SessionImplementor, java.lang.Object) methods. This is used to establish the class of an array of this type.

Specified by:
getReturnedClass in interface Type
Returns:
The java type class handled by this type.

isEqual

public boolean isEqual(Object x,
                       Object y)
                throws HibernateException
Description copied from interface: Type
Compare two instances of the class mapped by this type for persistence "equality" (equality of persistent state).

This should always equate to some form of comparison of the value's internal state. As an example, for something like a date the comparison should be based on its internal "time" state based on the specific portion it is meant to represent (timestamp, date, time).

Specified by:
isEqual in interface Type
Overrides:
isEqual in class AbstractType
Parameters:
x - The first value
y - The second value
Returns:
True if there are considered equal (see discussion above).
Throws:
HibernateException - A problem occurred performing the comparison

getHashCode

public int getHashCode(Object x)
Description copied from interface: Type
Get a hash code, consistent with persistence "equality". Again for most types the normal usage is to delegate to the value's hashCode.

Specified by:
getHashCode in interface Type
Overrides:
getHashCode in class AbstractType
Parameters:
x - The value for which to retrieve a hash code
Returns:
The hash code

nullSafeGet

public Object nullSafeGet(ResultSet rs,
                          String[] names,
                          SessionImplementor session,
                          Object owner)
                   throws HibernateException,
                          SQLException
Description copied from interface: Type
Extract a value of the mapped class from the JDBC result set. Implementors should handle possibility of null values.

Specified by:
nullSafeGet in interface Type
Parameters:
rs - The result set from which to extract value.
names - the column names making up this type value (use to read from result set)
session - The originating session
owner - the parent entity
Returns:
The extracted value
Throws:
HibernateException - An error from Hibernate
SQLException - An error from the JDBC driver
See Also:
alternative, 2-phase property initialization

nullSafeGet

public Object nullSafeGet(ResultSet rs,
                          String columnName,
                          SessionImplementor session,
                          Object owner)
                   throws HibernateException,
                          SQLException
Description copied from interface: Type
Extract a value of the mapped class from the JDBC result set. Implementors should handle possibility of null values. This form might be called if the type is known to be a single-column type.

Specified by:
nullSafeGet in interface Type
Parameters:
rs - The result set from which to extract value.
columnName - the column name making up this type value (use to read from result set)
session - The originating session
owner - the parent entity
Returns:
The extracted value
Throws:
HibernateException - An error from Hibernate
SQLException - An error from the JDBC driver

assemble

public Object assemble(Serializable cached,
                       SessionImplementor session,
                       Object owner)
                throws HibernateException
Description copied from interface: Type
Reconstruct the object from its disassembled state. This method is the reciprocal of Type.disassemble(java.lang.Object, org.hibernate.engine.spi.SessionImplementor, java.lang.Object)

Specified by:
assemble in interface Type
Overrides:
assemble in class AbstractType
Parameters:
cached - the disassembled state from the cache
session - the originating session
owner - the parent entity object
Returns:
the (re)assembled object
Throws:
HibernateException - An error from Hibernate

disassemble

public Serializable disassemble(Object value,
                                SessionImplementor session,
                                Object owner)
                         throws HibernateException
Description copied from interface: Type
Return a disassembled representation of the object. This is the value Hibernate will use in second level caching, so care should be taken to break values down to their simplest forms; for entities especially, this means breaking them down into their constituent parts.

Specified by:
disassemble in interface Type
Overrides:
disassemble in class AbstractType
Parameters:
value - the value to cache
session - the originating session
owner - optional parent entity object (needed for collections)
Returns:
the disassembled, deep cloned state
Throws:
HibernateException - An error from Hibernate

replace

public Object replace(Object original,
                      Object target,
                      SessionImplementor session,
                      Object owner,
                      Map copyCache)
               throws HibernateException
Description copied from interface: Type
During merge, replace the existing (target) value in the entity we are merging to with a new (original) value from the detached entity we are merging. For immutable objects, or null values, it is safe to simply return the first parameter. For mutable objects, it is safe to return a copy of the first parameter. For objects with component values, it might make sense to recursively replace component values.

Specified by:
replace in interface Type
Parameters:
original - the value from the detached entity being merged
target - the value in the managed entity
session - The originating session
owner - The owner of the value
copyCache - The cache of already copied/replaced values
Returns:
the value to be merged
Throws:
HibernateException - An error from Hibernate

nullSafeSet

public void nullSafeSet(PreparedStatement st,
                        Object value,
                        int index,
                        boolean[] settable,
                        SessionImplementor session)
                 throws HibernateException,
                        SQLException
Description copied from interface: Type
Bind a value represented by an instance of the mapped class to the JDBC prepared statement, ignoring some columns as dictated by the 'settable' parameter. Implementors should handle the possibility of null values. A multi-column type should bind parameters starting from index.

Specified by:
nullSafeSet in interface Type
Parameters:
st - The JDBC prepared statement to which to bind
value - the object to write
index - starting parameter bind index
settable - an array indicating which columns to bind/ignore
session - The originating session
Throws:
HibernateException - An error from Hibernate
SQLException - An error from the JDBC driver

nullSafeSet

public void nullSafeSet(PreparedStatement st,
                        Object value,
                        int index,
                        SessionImplementor session)
                 throws HibernateException,
                        SQLException
Description copied from interface: Type
Bind a value represented by an instance of the mapped class to the JDBC prepared statement. Implementors should handle possibility of null values. A multi-column type should bind parameters starting from index.

Specified by:
nullSafeSet in interface Type
Parameters:
st - The JDBC prepared statement to which to bind
value - the object to write
index - starting parameter bind index
session - The originating session
Throws:
HibernateException - An error from Hibernate
SQLException - An error from the JDBC driver

toXMLString

public String toXMLString(Object value,
                          SessionFactoryImplementor factory)

fromXMLString

public Object fromXMLString(String xml,
                            Mapping factory)

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

deepCopy

public Object deepCopy(Object value,
                       SessionFactoryImplementor factory)
                throws HibernateException
Description copied from interface: Type
Return a deep copy of the persistent state, stopping at entities and at collections.

Specified by:
deepCopy in interface Type
Parameters:
value - The value to be copied
factory - The session factory
Returns:
The deep copy
Throws:
HibernateException - An error from Hibernate

isMutable

public boolean isMutable()
Description copied from interface: Type
Are objects of this type mutable. (With respect to the referencing object ... entities and collections are considered immutable because they manage their own internal state.)

Specified by:
isMutable in interface Type
Returns:
boolean

stringToObject

public Object stringToObject(String xml)
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:
The converted value of the string representation.

objectToSQLString

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

Specified by:
objectToSQLString in interface LiteralType
Parameters:
value - The value to convert
dialect - The SQL dialect
Returns:
The value's string representation
Throws:
Exception - Indicates an issue converting the value to literal string.

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.

next

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

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

fromXMLNode

public Object fromXMLNode(org.dom4j.Node xml,
                          Mapping factory)
                   throws HibernateException
Description copied from interface: Type
Parse the XML representation of an instance.

Specified by:
fromXMLNode in interface Type
Parameters:
xml - The XML node from which to read the value
factory - The session factory
Returns:
an instance of the mapped class
Throws:
HibernateException - An error from Hibernate

setToXMLNode

public void setToXMLNode(org.dom4j.Node node,
                         Object value,
                         SessionFactoryImplementor factory)
                  throws HibernateException
Description copied from interface: Type
A representation of the value to be embedded in an XML element.

Specified by:
setToXMLNode in interface Type
Parameters:
node - The XML node to which to write the value
value - The value to write
factory - The session factory
Throws:
HibernateException - An error from Hibernate

toLoggableString

public String toLoggableString(Object value,
                               SessionFactoryImplementor factory)
                        throws HibernateException
Description copied from interface: Type
Generate a representation of the value for logging purposes.

Specified by:
toLoggableString in interface Type
Parameters:
value - The value to be logged
factory - The session factory
Returns:
The loggable representation
Throws:
HibernateException - An error from Hibernate

toColumnNullness

public boolean[] toColumnNullness(Object value,
                                  Mapping mapping)
Description copied from interface: Type
Given an instance of the type, return an array of boolean, indicating which mapped columns would be null.

Specified by:
toColumnNullness in interface Type
Parameters:
value - an instance of the type
mapping - The mapping abstraction
Returns:
array indicating column nullness for a value instance

isDirty

public boolean isDirty(Object old,
                       Object current,
                       boolean[] checkable,
                       SessionImplementor session)
                throws HibernateException
Description copied from interface: Type
Should the parent be considered dirty, given both the old and current value?

Specified by:
isDirty in interface Type
Parameters:
old - the old value
current - the current value
checkable - An array of booleans indicating which columns making up the value are actually checkable
session - The session from which the request originated.
Returns:
true if the field is dirty
Throws:
HibernateException - A problem occurred performing the checking

toString

public String toString(Object value)
                throws HibernateException
Description copied from interface: StringRepresentableType
Render the value to the string representation.

Specified by:
toString in interface StringRepresentableType
Parameters:
value - The value to render to string.
Returns:
The string representation
Throws:
HibernateException - Problem rendering

fromStringValue

public Object fromStringValue(String string)
                       throws HibernateException
Description copied from interface: StringRepresentableType
Consume the given string representation back into this types java form.

Specified by:
fromStringValue in interface StringRepresentableType
Parameters:
string - The string representation to be consumed.
Returns:
The java type representation
Throws:
HibernateException - Problem consuming


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