| /* |
| * 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.commons.math.optimization.linear; |
| |
| /** |
| * Types of relationships between two cells in a Solver {@link LinearConstraint}. |
| * @version $Revision: 1003886 $ $Date: 2010-10-02 23:04:44 +0200 (sam. 02 oct. 2010) $ |
| * @since 2.0 |
| */ |
| public enum Relationship { |
| |
| /** Equality relationship. */ |
| EQ("="), |
| |
| /** Lesser than or equal relationship. */ |
| LEQ("<="), |
| |
| /** Greater than or equal relationship. */ |
| GEQ(">="); |
| |
| /** Display string for the relationship. */ |
| private final String stringValue; |
| |
| /** Simple constructor. |
| * @param stringValue display string for the relationship |
| */ |
| private Relationship(String stringValue) { |
| this.stringValue = stringValue; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String toString() { |
| return stringValue; |
| } |
| |
| /** |
| * Get the relationship obtained when multiplying all coefficients by -1. |
| * @return relationship obtained when multiplying all coefficients by -1 |
| */ |
| public Relationship oppositeRelationship() { |
| switch (this) { |
| case LEQ : |
| return GEQ; |
| case GEQ : |
| return LEQ; |
| default : |
| return EQ; |
| } |
| } |
| |
| } |