EnumTypeConverterpublic 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. |
| Fields Summary |
|---|
| private Class | m_enumClass | | private String | m_enumClassName |
| Constructors Summary |
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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.
super(mapping);
m_enumClassName = enumClass.getName();
EnumSet theEnums = EnumSet.allOf(enumClass);
Iterator<Enum> i = theEnums.iterator();
while (i.hasNext()) {
Enum theEnum = i.next();
if (useOrdinalValues) {
addConversionValue(theEnum.ordinal(), theEnum.name());
} else {
addConversionValue(theEnum.name(), theEnum.name());
}
}
| public EnumTypeConverter(DatabaseMapping mapping, String enumClassName)PUBLIC:
Creating an enum converter this way expects that you will provide
the conversion values separately.
super(mapping);
m_enumClassName = enumClassName;
|
| Methods Summary |
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| public void | convertClassNamesToClasses(java.lang.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.
try {
if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
try {
m_enumClass = (Class)AccessController.doPrivileged(new PrivilegedClassForName(m_enumClassName, true, classLoader));
} catch (PrivilegedActionException exception) {
throw ValidationException.classNotFoundWhileConvertingClassNames(m_enumClassName, exception.getException());
}
} else {
m_enumClass = oracle.toplink.essentials.internal.security.PrivilegedAccessHelper.getClassForName(m_enumClassName, true, classLoader);
}
} catch (ClassNotFoundException exception){
throw ValidationException.classNotFoundWhileConvertingClassNames(m_enumClassName, exception);
}
| | public java.lang.Object | convertDataValueToObjectValue(java.lang.Object fieldValue, oracle.toplink.essentials.sessions.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.
Object obj = super.convertDataValueToObjectValue(fieldValue, session);
if (fieldValue == null) {
return obj;
} else {
return Enum.valueOf(m_enumClass, (String) obj);
}
| | public java.lang.Object | convertObjectValueToDataValue(java.lang.Object attributeValue, oracle.toplink.essentials.sessions.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.
if (attributeValue == null) {
return super.convertObjectValueToDataValue(null, session);
} else {
return super.convertObjectValueToDataValue((Enum.class.cast(attributeValue)).name(), session);
}
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