1 /**
2 * Copyright 2005-2013 The Kuali Foundation
3 *
4 * Licensed under the Educational Community License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.opensource.org/licenses/ecl2.php
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 package org.kuali.rice.krms.api.engine;
17
18 /**
19 * Interface for the engine that is used to resolve {@link Term}s.
20 *
21 * @author Kuali Rice Team (rice.collab@kuali.org)
22 *
23 */
24 public interface TermResolutionEngine {
25
26 /**
27 * Resolves a given term into a fact
28 * @param term the {@link Term} to resolve
29 * @return the fact value for the given {@link Term}
30 * @throws {@link TermResolutionException} if the given {@link Term} can't be resolved
31 */
32 <T> T resolveTerm(Term term) throws TermResolutionException;
33
34 /**
35 * Adds a fact value to the {@link TermResolutionEngine}'s internal state
36 * @param term the named Term
37 * @param value the fact value
38 */
39 void addTermValue(Term term, Object value);
40
41 /**
42 * Adds a {@link TermResolver} to the {@link TermResolutionEngine}. Once added, it may
43 * be used (unsurprisingly) by the engine to resolve {@link Term}s.
44 * @param termResolver the {@link TermResolver} to add.
45 */
46 void addTermResolver(TermResolver<?> termResolver);
47
48 }