org.datanucleus.store.rdbms.mapping.java

Class ObjectAsStringMapping

java.lang.Object

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

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

org.datanucleus.store.rdbms.mapping.java.ObjectAsStringMapping

Direct Known Subclasses:

ClassMapping, CurrencyMapping, LocaleMapping, TimeZoneMapping, URIMapping, URLMapping, UUIDMapping

public abstract class ObjectAsStringMapping
extends SingleFieldMapping

Abstract SCO mapping for a java type that will be stored as a String type.

Field Summary

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

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

Constructor Summary

Constructors

Constructor and Description
ObjectAsStringMapping()

Method Summary

Methods

Modifier and Type	Method and Description
abstract Class	getJavaType() Method to return the Java type.
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.
protected abstract String	objectToString(Object object) Method to set the datastore value based on the object value.
void	setObject(org.datanucleus.ExecutionContext ec, PreparedStatement ps, int[] exprIndex, Object value) Method to set the object when updating the the datastore.
protected abstract Object	stringToObject(String datastoreValue) Method to extract the objects value from the datastore object.

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

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

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

addDatastoreMapping, 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

ObjectAsStringMapping

public ObjectAsStringMapping()

Method Detail

getJavaType

public abstract Class getJavaType()

Method to return the Java type.

Specified by:

getJavaType in class JavaTypeMapping

Returns:

The Java type being represented.

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[])

objectToString

protected abstract String objectToString(Object object)

Method to set the datastore value based on the object value.

Parameters:

object - The object

Returns:

The value to pass to the datastore

stringToObject

protected abstract Object stringToObject(String datastoreValue)

Method to extract the objects value from the datastore object.

Parameters:

datastoreValue - Value obtained from the datastore

Returns:

The value of this object (derived from the datastore value)