org.datanucleus.store.mapped.mapping
Class SerialisedMapping

java.lang.Object
  extended by org.datanucleus.store.mapped.mapping.JavaTypeMapping
      extended by org.datanucleus.store.mapped.mapping.SingleFieldMapping
          extended by 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


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