001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018 package org.apache.commons.math3.optimization.linear; 019 020 /** 021 * Types of relationships between two cells in a Solver {@link LinearConstraint}. 022 * @version $Id: Relationship.java 1422230 2012-12-15 12:11:13Z erans $ 023 * @deprecated As of 3.1 (to be removed in 4.0). 024 * @since 2.0 025 */ 026 @Deprecated 027 public enum Relationship { 028 029 /** Equality relationship. */ 030 EQ("="), 031 032 /** Lesser than or equal relationship. */ 033 LEQ("<="), 034 035 /** Greater than or equal relationship. */ 036 GEQ(">="); 037 038 /** Display string for the relationship. */ 039 private final String stringValue; 040 041 /** Simple constructor. 042 * @param stringValue display string for the relationship 043 */ 044 private Relationship(String stringValue) { 045 this.stringValue = stringValue; 046 } 047 048 @Override 049 public String toString() { 050 return stringValue; 051 } 052 053 /** 054 * Get the relationship obtained when multiplying all coefficients by -1. 055 * @return relationship obtained when multiplying all coefficients by -1 056 */ 057 public Relationship oppositeRelationship() { 058 switch (this) { 059 case LEQ : 060 return GEQ; 061 case GEQ : 062 return LEQ; 063 default : 064 return EQ; 065 } 066 } 067 068 }