org.datanucleus.store.rdbms.mapping.java

Class ClassMapping

java.lang.Object

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

org.datanucleus.store.rdbms.mapping.java.SingleFieldMapping

org.datanucleus.store.rdbms.mapping.java.ClassMapping

public class ClassMapping
extends SingleFieldMapping

Mapping for a Class type. Converts it to a String for persisting in the datastore.

Field Summary

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

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

Constructor Summary

Constructors

Constructor and Description
ClassMapping()

Method Summary

Modifier and Type	Method and Description
Class	getJavaType() Accessor for the java type being mapped.
String	getJavaTypeForDatastoreMapping(int index) Accessor for the name of the java-type actually used when mapping the particular datastore field.
Object	getObject(org.datanucleus.ExecutionContext ec, ResultSet resultSet, int[] exprIndex) Method to get the object from the datastore and convert to an object.
void	initialize(org.datanucleus.metadata.AbstractMemberMetaData fmd, Table table, org.datanucleus.ClassLoaderResolver clr) Initialize this JavaTypeMapping with the given DatastoreAdapter for the given FieldMetaData.
void	setObject(org.datanucleus.ExecutionContext ec, PreparedStatement ps, int[] exprIndex, Object value) Method to set the object when updating the the datastore.

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

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

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

addDatastoreMapping, equals, failureMessage, getAbsoluteFieldNumber, getColumnMetaDataForMember, getDatastoreMapping, getDatastoreMappings, getMemberMetaData, getNumberOfDatastoreMappings, getObject, getReferenceMapping, getRoleForMember, getStoreManager, getTable, getType, getValueForDatastoreMapping, hashCode, hasSimpleDatastoreRepresentation, includeInFetchStatement, includeInInsertStatement, includeInUpdateStatement, initialize, isNullable, isSerialised, representableAsStringLiteralInStatement, setAbsFieldNumber, setMemberMetaData, setObject, setReferenceMapping, setRoleForMember, setTable

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassMapping

public ClassMapping()

Method Detail

initialize

public void initialize(org.datanucleus.metadata.AbstractMemberMetaData fmd,
                       Table table,
                       org.datanucleus.ClassLoaderResolver clr)

Description copied from class: SingleFieldMapping

Initialize this JavaTypeMapping with the given DatastoreAdapter for the given FieldMetaData.

Overrides:

initialize in class SingleFieldMapping

Parameters:

fmd - FieldMetaData for the field to be mapped (if any)

table - The datastore container storing this mapping (if any)

clr - the ClassLoaderResolver

getJavaType

public Class getJavaType()

Description copied from class: JavaTypeMapping

Accessor for the java type being mapped. This is the java type that the mapping represents. Some examples :

• if the field is of type "MyClass" then the mapping will be OIDMapping (or subclass) the javaType will be OID, and the type will be MyClass.
• if the field is of type "int" then the mapping will be IntegerMapping, the javaType will be Integer, and the type will be int.

The "java type" is the java-type name used in the plugin.xml mapping file

Specified by:

getJavaType in class JavaTypeMapping

Returns:

The java type

getJavaTypeForDatastoreMapping

public String getJavaTypeForDatastoreMapping(int index)

Accessor for the name of the java-type actually used when mapping the particular datastore field. This java-type must have an entry in the datastore mappings.

Overrides:

getJavaTypeForDatastoreMapping in class SingleFieldMapping

Parameters:

index - requested datastore field index.

Returns:

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

setObject

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

Method to set the object when updating the the datastore.

Overrides:

setObject in class SingleFieldMapping

Parameters:

ec - ExecutionContext

ps - PreparedStatement

exprIndex - the position of the value in the statement

value - the value

See Also:

SingleFieldMapping.setObject(org.datanucleus.ExecutionContext, PreparedStatement, int[], java.lang.Object)

getObject

public Object getObject(org.datanucleus.ExecutionContext ec,
                        ResultSet resultSet,
                        int[] exprIndex)

Method to get the object from the datastore and convert to an object.

Overrides:

getObject in class SingleFieldMapping

Parameters:

ec - ExecutionContext

resultSet - ResultSet

exprIndex - the position of the value in the result

Returns:

the value

See Also:

SingleFieldMapping.getObject(org.datanucleus.ExecutionContext, ResultSet, int[])