/*
* Copyright 2015, The Querydsl Team (http://www.querydsl.com/team)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.querydsl.core;
import com.querydsl.core.types.Constant;
import com.querydsl.core.types.ConstantImpl;
import com.querydsl.core.types.Expression;
import com.querydsl.core.types.Visitor;
import com.querydsl.core.types.dsl.BooleanExpression;
import com.querydsl.core.types.dsl.NumberExpression;
import com.querydsl.core.util.MathUtils;
/**
* NumberConstant represents numeric constants
*
* @author tiwe
*
* @param <D>
*/
final class NumberConstant<D extends Number & Comparable<?>> extends NumberExpression<D> implements Constant<D> {
private static final long serialVersionUID = 2958824808974260439L;
/**
* Factory method
*
* @param <T>
* @param val
* @return
*/
@SuppressWarnings("unchecked")
public static <T extends Number & Comparable<?>> NumberExpression<T> create(T val) {
return new NumberConstant<T>((Class<T>) val.getClass(), val);
}
private final D constant;
public NumberConstant(Class<? extends D> type, D constant) {
super(ConstantImpl.create(constant));
this.constant = constant;
}
@Override
public <R,C> R accept(Visitor<R,C> v, C context) {
return v.visit(this, context);
}
@Override
public BooleanExpression eq(D b) {
return BooleanConstant.create(constant.equals(b));
}
@Override
public D getConstant() {
return constant;
}
@Override
public BooleanExpression ne(D b) {
return BooleanConstant.create(!constant.equals(b));
}
@Override
public NumberExpression<D> add(Number right) {
return NumberConstant.create(MathUtils.sum(constant, right));
}
@Override
public <N extends Number & Comparable<?>> NumberExpression<D> add(Expression<N> right) {
if (right instanceof Constant<?>) {
return add(((Constant<N>) right).getConstant());
} else {
return super.add(right);
}
}
@Override
public NumberExpression<D> subtract(Number right) {
return NumberConstant.create(MathUtils.difference(constant, right));
}
@Override
public <N extends Number & Comparable<?>> NumberExpression<D> subtract(Expression<N> right) {
if (right instanceof Constant<?>) {
return subtract(((Constant<N>) right).getConstant());
} else {
return super.subtract(right);
}
}
@Override
public NumberExpression<Byte> byteValue() {
return NumberConstant.create(constant.byteValue());
}
@Override
public NumberExpression<Double> doubleValue() {
return NumberConstant.create(constant.doubleValue());
}
@Override
public NumberExpression<Float> floatValue() {
return NumberConstant.create(constant.floatValue());
}
@Override
public NumberExpression<Long> longValue() {
return NumberConstant.create(constant.longValue());
}
@Override
public NumberExpression<Short> shortValue() {
return NumberConstant.create(constant.shortValue());
}
}