001/**
002 * Copyright (C) 2007 - 2016, Jens Lehmann
003 *
004 * This file is part of DL-Learner.
005 *
006 * DL-Learner is free software; you can redistribute it and/or modify
007 * it under the terms of the GNU General Public License as published by
008 * the Free Software Foundation; either version 3 of the License, or
009 * (at your option) any later version.
010 *
011 * DL-Learner is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
014 * GNU General Public License for more details.
015 *
016 * You should have received a copy of the GNU General Public License
017 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
018 */
019package org.dllearner.prolog;
020
021import java.util.ArrayList;
022
023/**
024 * 
025 * @author Sebastian Bader
026 * 
027 */
028public class Body {
029        private ArrayList<Literal> literals;
030
031        public Body() {
032                literals = new ArrayList<>();
033        }
034
035        public void addLiteral(Literal literal) {
036                literals.add(literal);
037        }
038
039        public ArrayList<Literal> getLiterals() {
040                return literals;
041        }
042
043        public boolean isEmpty() {
044                return literals.isEmpty();
045        }
046
047        public boolean isGround() {
048                for (Literal literal : literals) {
049                        if (!literal.isGround())
050                                return false;
051                }
052
053                return true;
054        }
055
056        public Body getInstance(Variable variable, Term term) {
057                Body newbody = new Body();
058
059                for (Literal literal : literals) {
060                        newbody.addLiteral(literal.getInstance(variable, term));
061                }
062
063                return newbody;
064        }
065
066        @Override
067        public String toString() {
068                StringBuffer ret = new StringBuffer();
069
070                for (int i = 0; i < literals.size(); i++) {
071                        ret.append(literals.get(i));
072                        if (i + 1 < literals.size())
073                                ret.append(", ");
074                }
075
076                return ret.toString();
077        }
078
079        public String toPLString() {
080                StringBuffer ret = new StringBuffer();
081
082                for (int i = 0; i < literals.size(); i++) {
083                        ret.append(literals.get(i).toPLString());
084                        if (i + 1 < literals.size())
085                                ret.append(", ");
086                }
087
088                return ret.toString();
089        }
090
091}