org.datanucleus.store.rdbms.mapping.java

Class CharacterMapping

java.lang.Object

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

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

org.datanucleus.store.rdbms.mapping.java.CharacterMapping

public class CharacterMapping
extends SingleFieldMapping

Mapping for Character type. In RDBMS, this mapping can be stored in INT or CHAR columns. The use of INT columns facilitates greater than, less than operations within queries etc.

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
CharacterMapping()

Method Summary

Modifier and Type	Method and Description
int	getDefaultLength(int index) Method to return the default length of this type in the datastore.
Class	getJavaType() Accessor for the java type being mapped.

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

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

CharacterMapping

public CharacterMapping()

Method Detail

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

getDefaultLength

public int getDefaultLength(int index)

Method to return the default length of this type in the datastore. Character(char will need a single character!

Overrides:

getDefaultLength in class SingleFieldMapping

Parameters:

index - The index position

Returns:

The default length