org.jpox.store.mapped.mapping
Class ObjectIdClassMapping

java.lang.Object
  org.jpox.store.mapped.mapping.JavaTypeMapping
      org.jpox.store.mapped.mapping.SingleFieldMapping
          org.jpox.store.mapped.mapping.OIDMapping
              org.jpox.store.mapped.mapping.PersistenceCapableMapping
                  org.jpox.store.mapped.mapping.ObjectIdClassMapping

All Implemented Interfaces:

MappingCallbacks, SimpleDatastoreRepresentation

public class ObjectIdClassMapping
extends PersistenceCapableMapping

Maps to identity objects of PersistenceCapable values. Used only from within JDOQL queries on JDOHelper.getObjectId expressions

Version:

$Revision: 1.4 $

Field Summary

Fields inherited from class org.jpox.store.mapped.mapping.PersistenceCapableMapping

javaTypeMappings

Fields inherited from class org.jpox.store.mapped.mapping.JavaTypeMapping

datastoreContainer, datastoreMappings, dba, fmd, LOCALISER, MAPPING_ARRAY_ELEMENT, MAPPING_COLLECTION_ELEMENT, MAPPING_FIELD, MAPPING_MAP_KEY, MAPPING_MAP_VALUE, referenceMapping, roleForField, type

Constructor Summary

ObjectIdClassMapping(PersistenceCapableMapping pcMapping)
Constructor used to generate a PCMapping representing only the identity of the object.

Method Summary

java.lang.Object

getObject(ObjectManager om, java.lang.Object rs, int[] param) Returns a instance of a PersistenceCapable class.

Methods inherited from class org.jpox.store.mapped.mapping.PersistenceCapableMapping

addJavaTypeMapping, getDataStoreMapping, getJavaTypeMapping, getNumberOfDatastoreFields, initialize, newLiteral, newScalarExpression, postFetch, postInsert, postUpdate, preDelete, prepareDatastoreMapping, prepareDatastoreMapping, setObject, setObject

Methods inherited from class org.jpox.store.mapped.mapping.OIDMapping

getJavaType, getSampleValue

Methods inherited from class org.jpox.store.mapped.mapping.SingleFieldMapping

equals, getBoolean, getByte, getChar, getDefaultLength, getDouble, getFloat, getInt, getJavaTypeForDatastoreMapping, getLong, getShort, getString, getValidValues, setBoolean, setByte, setChar, setDouble, setFloat, setInt, setLong, setShort, setString

Methods inherited from class org.jpox.store.mapped.mapping.JavaTypeMapping

addDataStoreMapping, failureMessage, getDatastoreContainer, getDataStoreMappings, getFieldMetaData, getObject, getReferenceMapping, getRoleForField, getType, includeInFetchStatement, includeInInsertStatement, includeInUpdateStatement, initialize, isNullable, isSerialised, setDefault, setFieldInformation, setReferenceMapping, setRoleForField

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectIdClassMapping

public ObjectIdClassMapping(PersistenceCapableMapping pcMapping)

Constructor used to generate a PCMapping representing only the identity of the object. This is typically used where the user has selected the id in a JDOQL query as a result field.

Parameters:

pcMapping - The mapping to base it on

Method Detail

getObject

public java.lang.Object getObject(ObjectManager om,
                                  java.lang.Object rs,
                                  int[] param)

Returns a instance of a PersistenceCapable class. Processes a FK field and converts the id stored firstly into an OID/AID and then into the object that the FK id relates to.

Overrides:

getObject in class PersistenceCapableMapping

Parameters:

om - The ObjectManager

rs - The ResultSet

param - Array of parameter ids in the ResultSet to retrieve

Returns:

The Persistence Capable object