01: package org.drools.spi;
02:
03: /*
04: * Copyright 2005 JBoss Inc
05: *
06: * Licensed under the Apache License, Version 2.0 (the "License");
07: * you may not use this file except in compliance with the License.
08: * You may obtain a copy of the License at
09: *
10: * http://www.apache.org/licenses/LICENSE-2.0
11: *
12: * Unless required by applicable law or agreed to in writing, software
13: * distributed under the License is distributed on an "AS IS" BASIS,
14: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15: * See the License for the specific language governing permissions and
16: * limitations under the License.
17: */
18:
19: import java.io.Serializable;
20: import java.util.Comparator;
21:
22: /**
23: * Strategy for resolving conflicts amongst multiple rules.
24: *
25: * <p>
26: * Since a fact or set of facts may activate multiple rules, a
27: * <code>ConflictResolutionStrategy</code> is used to provide priority
28: * ordering of conflicting rules.
29: * </p>
30: *
31: * @see Activation
32: * @see Tuple
33: * @see org.drools.rule.Rule
34: *
35: * @author <a href="mailto:bob@werken.com">bob mcwhirter </a>
36: * @author <a href="mailto:simon@redhillconsulting.com.au">Simon Harris </a>
37: *
38: * @version $Id: ConflictResolver.java,v 1.1 2005/07/26 01:06:32 mproctor Exp $
39: */
40: public interface ConflictResolver extends Serializable, Comparator {
41: int compare(Activation lhs, Activation rhs);
42: }
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