org.datanucleus.store.rdbms.mapping.java

Class ObjectMapping

java.lang.Object

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

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

org.datanucleus.store.rdbms.mapping.java.MultiPersistableMapping

org.datanucleus.store.rdbms.mapping.java.ReferenceMapping

org.datanucleus.store.rdbms.mapping.java.ObjectMapping

All Implemented Interfaces:

MappingCallbacks

public class ObjectMapping
extends ReferenceMapping

Mapping for Object fields. An Object field can represent two things

1. An object of a series of possible PC types ("implementation-classes") and each implementation type is represented in the datastore by a FK to the PC table
2. An object of a series of possible non-PC types (e.g String, Long, Double etc) and each implementation type is represented in the datastore by a separate column

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.mapping.java.ReferenceMapping

ID_MAPPING, mappingStrategy, PER_IMPLEMENTATION_MAPPING, XCALIA_MAPPING

Fields inherited from class org.datanucleus.store.rdbms.mapping.java.MultiMapping

javaTypeMappings, numberOfColumnMappings

Fields inherited from class org.datanucleus.store.rdbms.mapping.java.JavaTypeMapping

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

Constructor Summary

Constructors

Constructor and Description
ObjectMapping()

Method Summary

Modifier and Type	Method and Description
Class	getJavaType() Accessor for the Java type being represented.
String	getJavaTypeForColumnMapping(int index) Accessor for the name of the java-type actually used when mapping the particular datastore field.

Methods inherited from class org.datanucleus.store.rdbms.mapping.java.ReferenceMapping

getJavaTypeMappingForType, getMappingNumberForValue, getMappingStrategy, getObject, getObjectForReferenceString, getReferenceStringForObject, initialize, insertPostProcessing, postFetch, postInsert, postUpdate, preDelete, prepareColumnMapping, setObject

Methods inherited from class org.datanucleus.store.rdbms.mapping.java.MultiPersistableMapping

setObject

Methods inherited from class org.datanucleus.store.rdbms.mapping.java.MultiMapping

addJavaTypeMapping, getColumnMapping, getColumnMappings, getJavaTypeMapping, getNumberOfColumnMappings

Methods inherited from class org.datanucleus.store.rdbms.mapping.java.JavaTypeMapping

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectMapping

public ObjectMapping()

Method Detail

getJavaType

public Class getJavaType()

Accessor for the Java type being represented.

Overrides:

getJavaType in class ReferenceMapping

Returns:

java.lang.Object

getJavaTypeForColumnMapping

public String getJavaTypeForColumnMapping(int index)

Accessor for the name of the java-type actually used when mapping the particular datastore field. Returns Serializable since the object needs to be serialisable

Overrides:

getJavaTypeForColumnMapping in class ReferenceMapping

Parameters:

index - requested column index.

Returns:

the name of java-type for the requested column.