private static GenerationStrategyPair buildGenerationStrategyPair(
final SessionFactoryImplementor sessionFactory, final Property mappingProperty) {
final ValueGeneration valueGeneration = mappingProperty.getValueGenerationStrategy();
if (valueGeneration != null
&& valueGeneration.getGenerationTiming() != GenerationTiming.NEVER) {
// the property is generated in full. build the generation strategy pair.
if (valueGeneration.getValueGenerator() != null) {
// in-memory generation
return new GenerationStrategyPair(
FullInMemoryValueGenerationStrategy.create(valueGeneration));
} else {
// in-db generation
return new GenerationStrategyPair(create(sessionFactory, mappingProperty, valueGeneration));
}
} else if (mappingProperty.getValue() instanceof Component) {
final CompositeGenerationStrategyPairBuilder builder =
new CompositeGenerationStrategyPairBuilder(mappingProperty);
interpretPartialCompositeValueGeneration(
sessionFactory, (Component) mappingProperty.getValue(), builder);
return builder.buildPair();
}
return NO_GEN_PAIR;
}
public static InDatabaseValueGenerationStrategyImpl create(
SessionFactoryImplementor sessionFactoryImplementor,
Property mappingProperty,
ValueGeneration valueGeneration) {
final int numberOfMappedColumns =
mappingProperty.getType().getColumnSpan(sessionFactoryImplementor);
if (numberOfMappedColumns == 1) {
return new InDatabaseValueGenerationStrategyImpl(
valueGeneration.getGenerationTiming(),
valueGeneration.referenceColumnInSql(),
new String[] {valueGeneration.getDatabaseGeneratedReferencedColumnValue()});
} else {
if (valueGeneration.getDatabaseGeneratedReferencedColumnValue() != null) {
LOG.debugf(
"Value generator specified column value in reference to multi-column attribute [%s -> %s]; ignoring",
mappingProperty.getPersistentClass(), mappingProperty.getName());
}
return new InDatabaseValueGenerationStrategyImpl(
valueGeneration.getGenerationTiming(),
valueGeneration.referenceColumnInSql(),
new String[numberOfMappedColumns]);
}
}
/**
* Whether the given value generation strategy requires to read the value from the database or
* not.
*/
private boolean isReadRequired(ValueGeneration valueGeneration, GenerationTiming matchTiming) {
return valueGeneration != null
&& valueGeneration.getValueGenerator() == null
&& timingsMatch(valueGeneration.getGenerationTiming(), matchTiming);
}
public static FullInMemoryValueGenerationStrategy create(ValueGeneration valueGeneration) {
return new FullInMemoryValueGenerationStrategy(
valueGeneration.getGenerationTiming(), valueGeneration.getValueGenerator());
}