/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* License: GNU Lesser General Public License (LGPL), version 2.1 or later
* See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
*/
package org.hibernate.orm.type.descriptor.java.spi;
import java.io.Serializable;
import java.util.Comparator;
import java.util.Optional;
import org.hibernate.HibernateException;
import org.hibernate.internal.util.compare.ComparableComparator;
import org.hibernate.internal.util.compare.EqualsHelper;
/**
* Abstract adapter for Java type descriptors.
*
* @author Steve Ebersole
*/
public abstract class AbstractTypeDescriptor<T> implements JavaTypeDescriptor<T>, Serializable {
private final Class<T> javaType;
private final MutabilityPlan<T> mutabilityPlan;
private final Comparator<T> comparator;
/**
* Initialize a type descriptor for the given type. Assumed immutable.
*
* @param javaType The Java type.
*
* @see #AbstractTypeDescriptor(Class, MutabilityPlan)
*/
@SuppressWarnings({ "unchecked" })
protected AbstractTypeDescriptor(Class<T> javaType) {
this( javaType, (MutabilityPlan<T>) ImmutableMutabilityPlan.INSTANCE );
}
/**
* Initialize a type descriptor for the given type. Assumed immutable.
*
* @param javaType The Java type.
* @param mutabilityPlan The plan for handling mutability aspects of the java type.
*/
@SuppressWarnings({ "unchecked" })
protected AbstractTypeDescriptor(Class<T> javaType, MutabilityPlan<T> mutabilityPlan) {
this(
javaType,
mutabilityPlan,
Comparable.class.isAssignableFrom( javaType )
? (Comparator<T>) ComparableComparator.INSTANCE
: null
);
}
public AbstractTypeDescriptor(Class<T> javaType, MutabilityPlan<T> mutabilityPlan, Comparator<T> comparator) {
this.javaType = javaType;
this.mutabilityPlan = mutabilityPlan;
this.comparator = comparator;
}
@Override
public MutabilityPlan<T> getMutabilityPlan() {
return mutabilityPlan;
}
@Override
public Class<T> getJavaType() {
return javaType;
}
@Override
public int extractHashCode(T value) {
return value.hashCode();
}
@Override
public boolean areEqual(T one, T another) {
return EqualsHelper.equals( one, another );
}
@Override
public Comparator<T> getComparator() {
return comparator;
}
@Override
public String extractLoggableRepresentation(T value) {
return (value == null) ? "null" : value.toString();
}
protected HibernateException unknownUnwrap(Class conversionType) {
throw new HibernateException(
"Unknown unwrap conversion requested: " + getTypeName() + " to " + conversionType.getName()
);
}
protected HibernateException unknownWrap(Class conversionType) {
throw new HibernateException(
"Unknown wrap conversion requested: " + conversionType.getName() + " to " + getTypeName()
);
}
}