| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.tinkerpop.gremlin.process.traversal; |
| |
| import org.apache.tinkerpop.gremlin.util.NumberHelper; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| import java.util.function.BinaryOperator; |
| |
| /** |
| * A set of {@link BinaryOperator} instances that handle common operations for traversal steps. |
| * |
| * @author Marko A. Rodriguez (http://markorodriguez.com) |
| */ |
| public enum Operator implements BinaryOperator<Object> { |
| |
| /** |
| * An addition function. |
| * |
| * @since 3.0.0-incubating |
| */ |
| sum { |
| public Object apply(final Object a, Object b) { |
| return NumberHelper.add((Number) a, (Number) b); |
| } |
| }, |
| |
| /** |
| * A subtraction function. |
| * |
| * @since 3.0.0-incubating |
| */ |
| minus { |
| public Object apply(final Object a, final Object b) { |
| return NumberHelper.sub((Number) a, (Number) b); |
| } |
| }, |
| |
| /** |
| * A multiplication function. |
| * |
| * @since 3.0.0-incubating |
| */ |
| mult { |
| public Object apply(final Object a, final Object b) { |
| return NumberHelper.mul((Number) a, (Number) b); |
| } |
| }, |
| |
| /** |
| * A division function. |
| * |
| * @since 3.0.0-incubating |
| */ |
| div { |
| public Object apply(final Object a, final Object b) { |
| return NumberHelper.div((Number) a, (Number) b); |
| } |
| }, |
| |
| /** |
| * Selects the smaller of the values. |
| * |
| * @since 3.0.0-incubating |
| */ |
| min { |
| public Object apply(final Object a, final Object b) { |
| return NumberHelper.min((Number) a, (Number) b); |
| } |
| }, |
| |
| /** |
| * Selects the larger of the values. |
| * |
| * @since 3.0.0-incubating |
| */ |
| max { |
| public Object apply(final Object a, final Object b) { |
| return NumberHelper.max((Number) a, (Number) b); |
| } |
| }, |
| |
| /** |
| * The new incoming value (i.e. the second value to the function) is returned unchanged result in the assignment |
| * of that value to the object of the {@code Operator}. |
| * |
| * @since 3.1.0-incubating |
| */ |
| assign { |
| public Object apply(final Object a, final Object b) { |
| return b; |
| } |
| }, |
| |
| /** |
| * Applies "and" to boolean values. |
| * |
| * @since 3.2.0-incubating |
| */ |
| and { |
| public Object apply(final Object a, final Object b) { |
| return ((boolean) a) && ((boolean) b); |
| } |
| }, |
| |
| /** |
| * Applies "or" to boolean values. |
| * |
| * @since 3.2.0-incubating |
| */ |
| or { |
| public Object apply(final Object a, final Object b) { |
| return ((boolean) a) || ((boolean) b); |
| } |
| }, |
| |
| /** |
| * Takes all objects in the second {@code Collection} and adds them to the first. |
| * |
| * @since 3.2.0-incubating |
| */ |
| addAll { |
| public Object apply(final Object a, final Object b) { |
| if (a instanceof Map) |
| ((Map<?,?>) a).putAll((Map) b); |
| else |
| ((Collection<?>) a).addAll((Collection) b); |
| return a; |
| } |
| }, |
| |
| /** |
| * Sums and adds long values. |
| * |
| * @since 3.2.0-incubating |
| */ |
| sumLong { |
| public Object apply(final Object a, final Object b) { |
| return (long) a + (long) b; |
| } |
| } |
| } |