Package org.datanucleus.store.rdbms.mapping.java

Class EnumMapping

java.lang.Object

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

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

org.datanucleus.store.rdbms.mapping.java.EnumMapping

public class EnumMapping
extends SingleFieldMapping

Mapping for Enum type.

Field Summary

Fields

Modifier and Type	Field	Description
protected String	datastoreJavaType
static String	EXTENSION_CHECK_CONSTRAINT_ENUM_VALUES	Metadata extension key for specifying that the enum column has a CHECK constraint in the datastore.

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

EXTENSION_CHECK_CONSTRAINT_VALUES

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

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

Constructor Summary

Constructors

Constructor	Description
EnumMapping()

Method Summary

Modifier and Type	Method	Description
Class	getJavaType()	Accessor for the java type being mapped.
String	getJavaTypeForColumnMapping(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)	Obtains a value from datastoreResults at position specified by exprIndex.
Object[]	getValidValues(int index)	Accessor for the valid values for this mapping (if any restriction is imposed).
void	initialize(org.datanucleus.metadata.AbstractMemberMetaData mmd, Table table, org.datanucleus.ClassLoaderResolver clr)	Initialize this JavaTypeMapping for the given member MetaData and Table owning it.
void	setObject(org.datanucleus.ExecutionContext ec, PreparedStatement ps, int[] exprIndex, Object value)	Sets a value into datastoreStatement at position specified by exprIndex.

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

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

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

addColumnMapping, equals, failureMessage, getAbsoluteFieldNumber, getColumnMapping, getColumnMappings, getColumnMetaDataForMember, getMemberMetaData, getNumberOfColumnMappings, getObject, getReferenceMapping, getRoleForMember, getStoreManager, getTable, getType, getValueForColumnMapping, hashCode, hasSimpleDatastoreRepresentation, includeInFetchStatement, includeInInsertStatement, includeInUpdateStatement, initialize, isNullable, isSerialised, performSetPostProcessing, representableAsStringLiteralInStatement, requiresSetPostProcessing, setAbsFieldNumber, setMemberMetaData, setObject, setReferenceMapping, setRoleForMember, setTable

Methods inherited from class java.lang.Object

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

Field Detail

EXTENSION_CHECK_CONSTRAINT_ENUM_VALUES

public static final String EXTENSION_CHECK_CONSTRAINT_ENUM_VALUES

Metadata extension key for specifying that the enum column has a CHECK constraint in the datastore. Set it to "true" to enable.

See Also:

Constant Field Values

datastoreJavaType

protected String datastoreJavaType

Constructor Detail

EnumMapping

public EnumMapping()

Method Detail

initialize

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

Initialize this JavaTypeMapping for the given member MetaData and Table owning it.

Overrides:

initialize in class SingleFieldMapping

Parameters:

mmd - MetaData for the member to be mapped (if any)

table - The table storing this mapping (if any)

clr - the ClassLoaderResolver

getValidValues

public Object[] getValidValues(int index)

Accessor for the valid values for this mapping (if any restriction is imposed).

Overrides:

getValidValues in class SingleFieldMapping

Parameters:

index - The index of the datastore column

Returns:

The valid value(s)

getJavaTypeForColumnMapping

public String getJavaTypeForColumnMapping(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:

getJavaTypeForColumnMapping in class SingleFieldMapping

Parameters:

index - requested column index.

Returns:

the name of java-type for the requested column.

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

setObject

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

Description copied from class: JavaTypeMapping

Sets a value into datastoreStatement at position specified by exprIndex.

Overrides:

setObject in class SingleFieldMapping

Parameters:

ec - ExecutionContext

ps - PreparedStatement

exprIndex - the position of the value in the statement

value - the value

getObject

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

Description copied from class: JavaTypeMapping

Obtains a value from datastoreResults at position specified by exprIndex.

Overrides:

getObject in class SingleFieldMapping

Parameters:

ec - ExecutionContext

resultSet - ResultSet

exprIndex - the position of the value in the result

Returns:

the value