Package org.eclipse.persistence.mappings.converters

Class EnumTypeConverter

java.lang.Object

org.eclipse.persistence.mappings.converters.ObjectTypeConverter

org.eclipse.persistence.mappings.converters.EnumTypeConverter

All Implemented Interfaces:

Serializable, CoreConverter<DatabaseMapping,Session>, org.eclipse.persistence.internal.descriptors.ClassNameConversionRequired, Converter

public class EnumTypeConverter
extends ObjectTypeConverter

Purpose: Object type converter is used to match a fixed number of database data values to a Java enum object value. It can be used when the values on the database and in the Java differ. To create an object type converter, simply specify the set of conversion value pairs. A default value and one-way conversion are also supported for legacy data situations.

See Also:

• Serialized Form

Author:

Guy Pelletier

Field Summary

Fields inherited from class org.eclipse.persistence.mappings.converters.ObjectTypeConverter

addToAttributeOnlyConversionValueStrings, attributeToFieldValues, conversionValueStrings, converterName, dataType, dataTypeName, defaultAttributeValue, defaultAttributeValueString, fieldClassification, fieldClassificationName, fieldToAttributeValues, mapping, objectType, objectTypeName

Constructor Summary

Constructors

Constructor	Description
EnumTypeConverter(DatabaseMapping mapping, Class enumClass, boolean useOrdinalValues)	PUBLIC: Creating an enum converter this way will create the conversion values for you using ordinal or name values.
EnumTypeConverter(DatabaseMapping mapping, String enumClassName)	PUBLIC: Creating an enum converter this way expects that you will provide the conversion values separately.
EnumTypeConverter(DatabaseMapping mapping, String enumClassName, boolean useOrdinalValues)	PUBLIC: Creating an enum converter this way will create the conversion values for you using ordinal or name values.

Method Summary

Modifier and Type	Method	Description
void	convertClassNamesToClasses(ClassLoader classLoader)	INTERNAL: Convert all the class-name-based settings in this converter to actual class-based settings.
Object	convertDataValueToObjectValue(Object fieldValue, Session session)	INTERNAL: Returns the corresponding attribute value for the specified field value.
Object	convertObjectValueToDataValue(Object attributeValue, Session session)	INTERNAL: Convert Enum object to the data value.
Class	getEnumClass()
String	getEnumClassName()
protected void	initializeConversions(Class enumClass)

Methods inherited from class org.eclipse.persistence.mappings.converters.ObjectTypeConverter

addConversionValue, addConversionValueStrings, addToAttributeOnlyConversionValue, addToAttributeOnlyConversionValueStrings, getAttributeToFieldValues, getDefaultAttributeValue, getFieldClassification, getFieldClassification, getFieldClassificationName, getFieldToAttributeValueAssociations, getFieldToAttributeValues, getMapping, initialize, initializeFieldClassification, isMutable, loadClass, mapBooleans, mapGenders, mapResponses, setAttributeToFieldValues, setConverterName, setDataTypeName, setDefaultAttributeValue, setDefaultAttributeValueString, setFieldClassification, setFieldClassificationName, setFieldToAttributeValueAssociations, setFieldToAttributeValues, setMapping, setObjectTypeName, throwInitObjectException

Methods inherited from class java.lang.Object

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

Constructor Details

EnumTypeConverter

public EnumTypeConverter(DatabaseMapping mapping,
 Class enumClass,
 boolean useOrdinalValues)

PUBLIC: Creating an enum converter this way will create the conversion values for you using ordinal or name values.

EnumTypeConverter

public EnumTypeConverter(DatabaseMapping mapping,
 String enumClassName,
 boolean useOrdinalValues)

PUBLIC: Creating an enum converter this way will create the conversion values for you using ordinal or name values.

EnumTypeConverter

public EnumTypeConverter(DatabaseMapping mapping,
 String enumClassName)

PUBLIC: Creating an enum converter this way expects that you will provide the conversion values separately.

Method Details

initializeConversions

protected void initializeConversions(Class enumClass)

getEnumClass

public Class getEnumClass()

getEnumClassName

public String getEnumClassName()

convertClassNamesToClasses

public void convertClassNamesToClasses(ClassLoader classLoader)

INTERNAL: Convert all the class-name-based settings in this converter to actual class-based settings. This method is used when converting a project that has been built with class names to a project with classes.

Specified by:

convertClassNamesToClasses in interface org.eclipse.persistence.internal.descriptors.ClassNameConversionRequired

Overrides:

convertClassNamesToClasses in class ObjectTypeConverter

Parameters:

classLoader -

convertDataValueToObjectValue

public Object convertDataValueToObjectValue(Object fieldValue,
 Session session)

INTERNAL: Returns the corresponding attribute value for the specified field value. Wraps the super method to return an Enum type from the string conversion.

Specified by:

convertDataValueToObjectValue in interface Converter

Specified by:

convertDataValueToObjectValue in interface CoreConverter<DatabaseMapping,Session>

Overrides:

convertDataValueToObjectValue in class ObjectTypeConverter

convertObjectValueToDataValue

public Object convertObjectValueToDataValue(Object attributeValue,
 Session session)

INTERNAL: Convert Enum object to the data value. Internal enums are stored as strings (names) so this method wraps the super method in that if breaks down the enum to a string name before converting it.

Specified by:

convertObjectValueToDataValue in interface Converter

Specified by:

convertObjectValueToDataValue in interface CoreConverter<DatabaseMapping,Session>

Overrides:

convertObjectValueToDataValue in class ObjectTypeConverter