org.datanucleus.store.mapped.mapping
Class SerialisedMapping

java.lang.Object
  org.datanucleus.store.mapped.mapping.JavaTypeMapping
      org.datanucleus.store.mapped.mapping.SingleFieldMapping
          org.datanucleus.store.mapped.mapping.SerialisedMapping

Direct Known Subclasses:

SerialisedPCMapping, SerialisedReferenceMapping

public class SerialisedMapping
extends SingleFieldMapping

Maps a field as serialised.

Field Summary

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

datastoreContainer, datastoreMappings, LOCALISER, mmd, referenceMapping, roleForMember, storeMgr, type

Constructor Summary

SerialisedMapping()

Method Summary

java.lang.Class	getJavaType() Accessor for the (Java) type of data represented here
java.lang.String	getJavaTypeForDatastoreMapping(int index) Accessor for the name of the java-type actually used when mapping the particular datastore field.
java.lang.Object	getSampleValue(ClassLoaderResolver clr) Accessor for a sample value for this type.
ScalarExpression	newLiteral(QueryExpression qs, java.lang.Object value) Creates a literal from an value for use in TJDO-style JDOQL.
ScalarExpression	newScalarExpression(QueryExpression qs, LogicSetExpression te) Creates a expression from a field name/table.

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

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

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

addDatastoreMapping, failureMessage, getColumnMetaDataForMember, getDatastoreContainer, getDatastoreMapping, getDatastoreMappings, getMemberMetaData, getNumberOfDatastoreMappings, getObject, getReferenceMapping, getRoleForMember, getType, getValueForDatastoreMapping, hashCode, hasSimpleDatastoreRepresentation, includeInFetchStatement, includeInInsertStatement, includeInUpdateStatement, initialize, isNullable, isSerialised, setDatastoreContainer, setDefault, setMemberMetaData, setObject, setReferenceMapping, setRoleForMember

Methods inherited from class java.lang.Object

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

Constructor Detail

SerialisedMapping

public SerialisedMapping()

Method Detail

getSampleValue

public java.lang.Object getSampleValue(ClassLoaderResolver clr)

Accessor for a sample value for this type.

Overrides:

getSampleValue in class JavaTypeMapping

Parameters:

clr - ClassLoader resolver

Returns:

The sample value

getJavaType

public java.lang.Class getJavaType()

Accessor for the (Java) type of data represented here

Specified by:

getJavaType in class JavaTypeMapping

Returns:

java.lang.Object

getJavaTypeForDatastoreMapping

public java.lang.String getJavaTypeForDatastoreMapping(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:

getJavaTypeForDatastoreMapping in class SingleFieldMapping

Parameters:

index - requested datastore field index.

Returns:

the name of java-type for the requested datastore field.

newLiteral

public ScalarExpression newLiteral(QueryExpression qs,
                                   java.lang.Object value)

Description copied from class: JavaTypeMapping

Creates a literal from an value for use in TJDO-style JDOQL. This implementation just throws a NucleusException.

Overrides:

newLiteral in class JavaTypeMapping

Parameters:

qs - The Query statement

value - The object

Returns:

A Scalar Expression TODO Remove this when we drop legacy query mechanism

newScalarExpression

public ScalarExpression newScalarExpression(QueryExpression qs,
                                            LogicSetExpression te)

Description copied from class: JavaTypeMapping

Creates a expression from a field name/table. e.g. tablename.fieldname; tablealias.fieldalias For use in TJDO-style JDOQL. This implementation just throws a NucleusException.

Overrides:

newScalarExpression in class JavaTypeMapping

Parameters:

qs - The Query statement

te - the alias for the table

Returns:

A Scalar Expression TODO Remove this when we drop legacy query mechanism