    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    }