1 /* 2 * #%L 3 * prolobjectlink-jpi 4 * %% 5 * Copyright (C) 2019 Prolobjectlink Project 6 * %% 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 * #L% 25 */ 26 package io.github.prolobjectlink.prolog; 27 28 import java.util.Set; 29 30 /** 31 * A collection that contains no duplicate Prolog operators. Extends from 32 * {@link Set} and add {@link #currentOp(String)} method to check if in the 33 * operator set is defined some particular operator specified by your string 34 * symbol. 35 * 36 * @author Jose Zalacain 37 * @since 1.0 38 */ 39 public interface PrologOperatorSet extends Set<PrologOperator> { 40 41 /** 42 * Check if in the operator set is defined some particular operator specified by 43 * your string symbol. If the operator is defined in the operator set return 44 * true or false in other case. 45 * 46 * @param operator operator to be checked 47 * @return true if the operator is defined in the operator set or false in other 48 * case. 49 * @since 1.0 50 */ 51 public boolean currentOp(String operator); 52 53 }