JoinFunction.java

/*
 * Copyright 2011-2014, by Vladimir Kostyukov and Contributors.
 *
 * This file is part of la4j project (http://la4j.org)
 *
 * 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.
 *
 * Contributor(s): -
 *
 */

package org.la4j.iterator;

// TODO: need a better name
abstract class JoinFunction {

    public static final JoinFunction ADD = new JoinFunction() {
        @Override
        public double apply(double a, double b) {
            return a + b;
        }
    };

    public static final JoinFunction SUB = new JoinFunction() {
        @Override
        public double apply(double a, double b) {
            return a - b;
        }
    };

    public static final JoinFunction MUL = new JoinFunction() {
        @Override
        public double apply(double a, double b) {
            return a * b;
        }
    };

    public static final JoinFunction DIV = new JoinFunction() {
        @Override
        public double apply(double a, double b) {
            return a / b;
        }
    };

    public static final JoinFunction MOD = new JoinFunction() {
        @Override
        public double apply(double a, double b) {
            return a % b;
        }
    };

    public abstract double apply(double a, double b);
}