org.hibernate.type.descriptor.java.AbstractTypeDescriptor Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of hibernate-core

The core O/RM functionality as provided by Hibernate

There is a newer version: 7.0.0.Alpha1

/*
 * 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 .
 */
package org.hibernate.type.descriptor.java;

import java.io.Serializable;
import java.util.Comparator;

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 implements JavaTypeDescriptor, Serializable {
	private final Class type;
	private final MutabilityPlan mutabilityPlan;
	private final Comparator comparator;

	/**
	 * Initialize a type descriptor for the given type.  Assumed immutable.
	 *
	 * @param type The Java type.
	 *
	 * @see #AbstractTypeDescriptor(Class, MutabilityPlan)
	 */
	@SuppressWarnings({ "unchecked" })
	protected AbstractTypeDescriptor(Class type) {
		this( type, (MutabilityPlan) ImmutableMutabilityPlan.INSTANCE );
	}

	/**
	 * Initialize a type descriptor for the given type.  Assumed immutable.
	 *
	 * @param type The Java type.
	 * @param mutabilityPlan The plan for handling mutability aspects of the java type.
	 */
	@SuppressWarnings({ "unchecked" })
	protected AbstractTypeDescriptor(Class type, MutabilityPlan mutabilityPlan) {
		this.type = type;
		this.mutabilityPlan = mutabilityPlan;
		this.comparator = Comparable.class.isAssignableFrom( type )
				? (Comparator) ComparableComparator.INSTANCE
				: null;
	}

	@Override
	public MutabilityPlan getMutabilityPlan() {
		return mutabilityPlan;
	}

	@Override
	public Class getJavaTypeClass() {
		return type;
	}

	@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 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: " + type.getName() + " to " + conversionType.getName()
		);
	}

	protected HibernateException unknownWrap(Class conversionType) {
		throw new HibernateException(
				"Unknown wrap conversion requested: " + conversionType.getName() + " to " + type.getName()
		);
	}
}