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 */ 017package org.apache.commons.math3.optim.linear; 018 019import org.apache.commons.math3.optim.OptimizationData; 020 021/** 022 * A constraint for a linear optimization problem indicating whether all 023 * variables must be restricted to non-negative values. 024 * 025 * @since 3.1 026 */ 027public class NonNegativeConstraint implements OptimizationData { 028 /** Whether the variables are all positive. */ 029 private final boolean isRestricted; 030 031 /** 032 * @param restricted If {@code true}, all the variables must be positive. 033 */ 034 public NonNegativeConstraint(boolean restricted) { 035 isRestricted = restricted; 036 } 037 038 /** 039 * Indicates whether all the variables must be restricted to non-negative 040 * values. 041 * 042 * @return {@code true} if all the variables must be positive. 043 */ 044 public boolean isRestrictedToNonNegative() { 045 return isRestricted; 046 } 047}