org.eclipse.persistence.jpa.jpql.tools.resolver.AbsFunctionResolver Maven / Gradle / Ivy
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/*
* Copyright (c) 2006, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0,
* or the Eclipse Distribution License v. 1.0 which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
*/
// Contributors:
// Oracle - initial API and implementation
//
package org.eclipse.persistence.jpa.jpql.tools.resolver;
import org.eclipse.persistence.jpa.jpql.tools.spi.IType;
import org.eclipse.persistence.jpa.jpql.tools.spi.ITypeDeclaration;
/**
* This {@link Resolver} is responsible to calculate the {@link IType} based on the type of the
* ABS expression. The valid type is a Number type.
*
* The ABS function takes a numeric argument and returns a number (integer, float, or double)
* of the same type as the argument to the function.
*
* @version 2.5
* @since 2.3
* @author Pascal Filion
*/
public class AbsFunctionResolver extends Resolver {
/**
* Creates a new AbsFunctionResolver.
*
* @param parent The parent {@link Resolver}, which is never null
*/
public AbsFunctionResolver(Resolver parent) {
super(parent);
}
/**
* {@inheritDoc}
*/
@Override
protected IType buildType() {
IType type = getParentType();
// Anything else is an invalid type
if (!getTypeHelper().isNumericType(type)) {
type = getTypeHelper().objectType();
}
return type;
}
/**
* {@inheritDoc}
*/
@Override
protected ITypeDeclaration buildTypeDeclaration() {
return getParentTypeDeclaration();
}
}