001/**
002 * Copyright 2005-2016 The Kuali Foundation
003 *
004 * Licensed under the Educational Community License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.opensource.org/licenses/ecl2.php
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.kuali.rice.krms.api.engine;
017
018/**
019 * Interface for the engine that is used to resolve {@link Term}s.
020 * 
021 * @author Kuali Rice Team (rice.collab@kuali.org)
022 *
023 */
024public interface TermResolutionEngine {
025
026        /**
027         * Resolves a given term into a fact
028         * @param term the {@link Term} to resolve
029         * @return the fact value for the given {@link Term}
030         * @throws {@link TermResolutionException} if the given {@link Term} can't be resolved
031         */
032        <T> T resolveTerm(Term term) throws TermResolutionException;
033        
034        /**
035         * Adds a fact value to the {@link TermResolutionEngine}'s internal state
036         * @param term the named Term
037         * @param value the fact value
038         */
039        void addTermValue(Term term, Object value);
040        
041        /**
042         * Adds a {@link TermResolver} to the {@link TermResolutionEngine}.  Once added, it may
043         * be used (unsurprisingly) by the engine to resolve {@link Term}s.
044         * @param termResolver the {@link TermResolver} to add.
045         */
046        void addTermResolver(TermResolver<?> termResolver);
047        
048}