Class PersistableIdMapping

java.lang.Object

org.datanucleus.store.rdbms.mapping.java.JavaTypeMapping

org.datanucleus.store.rdbms.mapping.java.MultiMapping

org.datanucleus.store.rdbms.mapping.java.PersistableMapping

org.datanucleus.store.rdbms.mapping.java.PersistableIdMapping

All Implemented Interfaces:

MappingCallbacks

public class PersistableIdMapping
extends PersistableMapping

Maps to identity objects of persistable values. Used within JDOQL queries on JDOHelper.getObjectId expressions, as well as on SQL statement results when selecting a PersistableMapping to convert to an identity.

Field Summary

Fields inherited from class PersistableMapping

cmd

Fields inherited from class MultiMapping

javaTypeMappings, numberOfColumnMappings

Fields inherited from class JavaTypeMapping

absFieldNumber, columnMappings, mmd, referenceMapping, roleForMember, storeMgr, table, type

Constructor Summary

Constructors

Constructor	Description
PersistableIdMapping(PersistableMapping pcMapping)	Constructor used to generate a mapping representing only the identity of the persistable object.

Method Summary

Modifier and Type	Method	Description
Object	getObject(org.datanucleus.ExecutionContext ec, ResultSet rs, int[] param)	Returns an identity for a persistable class.
void	setObject(org.datanucleus.ExecutionContext ec, PreparedStatement ps, int[] param, Object value)	Method to set the object based on an input identity.

Methods inherited from class PersistableMapping

getClassMetaData, getJavaType, getValueForColumnMapping, initialize, initialize, postInsert, postUpdate, preDelete, prepareColumnMapping, setObject

Methods inherited from class MultiMapping

addJavaTypeMapping, getColumnMapping, getColumnMappings, getJavaTypeMapping, getNumberOfColumnMappings

Methods inherited from class JavaTypeMapping

addColumnMapping, equals, failureMessage, getAbsoluteFieldNumber, getBoolean, getByte, getChar, getColumnMetaDataForMember, getDouble, getFloat, getInt, getJavaTypeForColumnMapping, getLong, getMemberMetaData, getObject, getReferenceMapping, getRoleForMember, getShort, getStoreManager, getString, getTable, getType, hashCode, hasSimpleDatastoreRepresentation, includeInFetchStatement, includeInInsertStatement, includeInUpdateStatement, isNullable, isSerialised, performSetPostProcessing, representableAsStringLiteralInStatement, requiresSetPostProcessing, setAbsFieldNumber, setBoolean, setByte, setChar, setDouble, setFloat, setInt, setLong, setMemberMetaData, setReferenceMapping, setRoleForMember, setShort, setString, setTable

Methods inherited from class Object

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

Methods inherited from interface MappingCallbacks

postFetch

Constructor Details

PersistableIdMapping

public PersistableIdMapping(PersistableMapping pcMapping)

Constructor used to generate a mapping representing only the identity of the persistable object.

Parameters:

pcMapping - The persistable mapping to base it on

Method Details

getObject

public Object getObject(org.datanucleus.ExecutionContext ec,
 ResultSet rs,
 int[] param)

Returns an identity for a persistable class. Processes a FK field and finds the object that it relates to, then returns the identity.

Overrides:

getObject in class PersistableMapping

Parameters:

ec - The ExecutionContext

rs - The ResultSet

param - Array of parameter ids in the ResultSet to retrieve

Returns:

The identity of the Persistence Capable object

setObject

public void setObject(org.datanucleus.ExecutionContext ec,
 PreparedStatement ps,
 int[] param,
 Object value)

Method to set the object based on an input identity.

Overrides:

setObject in class PersistableMapping

Parameters:

ec - ExecutionContext

ps - PreparedStatement

param - Parameter positions to populate when setting the value

value - The identity