/*
* 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.query.criteria.internal.predicate;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* @author Steve Ebersole
*/
public final class ImplicitNumericExpressionTypeDeterminer {
private ImplicitNumericExpressionTypeDeterminer() {
}
/**
* Determine the appropriate runtime result type for a numeric expression according to
* section "6.5.7.1 Result Types of Expressions" of the JPA spec.
* <p/>
* Note that it is expected that the caveats about quotient handling have already been handled.
*
* @param types The argument/expression types
*
* @return The appropriate numeric result type.
*/
public static Class<? extends Number> determineResultType(Class<? extends Number>... types) {
Class<? extends Number> result = Number.class;
for ( Class<? extends Number> type : types ) {
if ( Double.class.equals( type ) ) {
result = Double.class;
}
else if ( Float.class.equals( type ) ) {
result = Float.class;
}
else if ( BigDecimal.class.equals( type ) ) {
result = BigDecimal.class;
}
else if ( BigInteger.class.equals( type ) ) {
result = BigInteger.class;
}
else if ( Long.class.equals( type ) ) {
result = Long.class;
}
else if ( isIntegralType( type ) ) {
result = Integer.class;
}
}
return result;
}
private static boolean isIntegralType(Class<? extends Number> type) {
return Integer.class.equals( type ) ||
Short.class.equals( type );
}
}