io.prestosql.jdbc.$internal.jackson.annotation.ObjectIdGenerators Maven / Gradle / Ivy
package io.prestosql.jdbc.$internal.jackson.annotation;
import java.util.UUID;
/**
* Container class for standard {@link ObjectIdGenerator} implementations:
*
* - {@link IntSequenceGenerator}
*
- {@link PropertyGenerator}
*
- {@link StringIdGenerator} (since 2.7)
*
- {@link UUIDGenerator}
*
*
* NOTE: {@link PropertyGenerator} applicability is limited in one case: it can only
* be used on polymorphic base types (ones indicated using {@link JsonTypeInfo} or
* default typing) via class annotations: property annotation will fail due to lack
* of access to property, needed to determine type of Object Id for deserialization.
* This limitation may be lifted in future versions but it is the limitation at least
* up to and including Jackson 2.9.
*/
public class ObjectIdGenerators
{
/**
* Shared base class for concrete implementations.
*/
@SuppressWarnings("serial")
private abstract static class Base extends ObjectIdGenerator
{
protected final Class> _scope;
protected Base(Class> scope) {
_scope = scope;
}
@Override
public final Class> getScope() {
return _scope;
}
@Override
public boolean canUseFor(ObjectIdGenerator> gen) {
return (gen.getClass() == getClass()) && (gen.getScope() == _scope);
}
@Override
public abstract T generateId(Object forPojo);
}
/*
/**********************************************************
/* Implementation classes
/**********************************************************
*/
/**
* Abstract marker class used to allow explicitly specifying
* that no generator is used; which also implies that no
* Object Id is to be included or used.
*/
@SuppressWarnings("serial")
public abstract static class None extends ObjectIdGenerator