001: /*
002: * Copyright (C) 1999-2004 <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</a>
003: *
004: * This library is free software; you can redistribute it and/or
005: * modify it under the terms of the GNU Lesser General Public
006: * License as published by the Free Software Foundation; either
007: * version 2 of the License, or (at your option) any later version.
008: *
009: * This library is distributed in the hope that it will be useful,
010: * but WITHOUT ANY WARRANTY; without even the implied warranty of
011: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012: * Lesser General Public License for more details.
013: *
014: * You should have received a copy of the GNU Lesser General Public
015: * License along with this library; if not, write to the Free Software
016: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
017: */
018: package test.org.mandarax.reference;
019:
020: import org.mandarax.kernel.ClauseSet;
021: import org.mandarax.kernel.InferenceEngine;
022: import org.mandarax.kernel.KnowledgeBase;
023: import org.mandarax.kernel.Query;
024:
025: /**
026: * Same as FamilySample6, but use a JClauseSet to build the notEquals dynamically
027: * Note that this example does not run correctly in an applet environment using
028: * the default security settings since the dynamic invokation of a java method
029: * leads to a security exception. Since this exception is captured the program continues
030: * but the knowledge base does not contain all facts required
031: * Run this sample in an application environment!
032: * @see test.org.mandarax.reference.TestInferenceEngine6
033: * @author <A href="http://www-ist.massey.ac.nz/JBDietrich" target="_top">Jens Dietrich</A>
034: * @version 3.4 <7 March 05>
035: * @since 1.1
036: */
037: public class TestInferenceEngine7 extends TestInferenceEngine {
038:
039: /**
040: * Constructor.
041: * @param aKnowledgeBase a new, uninitialized knowledge base that will be used
042: * @param anInferenceEngine the inference engine that will be tested
043: */
044: public TestInferenceEngine7(KnowledgeBase aKnowledgeBase,
045: InferenceEngine anInferenceEngine) {
046: super (aKnowledgeBase, anInferenceEngine);
047: }
048:
049: /**
050: * Add facts and rules to the knowledge base.
051: * @param knowledge org.mandarax.kernel.KnowledgeBase
052: */
053: public void feedKnowledgeBase(KnowledgeBase knowledge) {
054: knowledge.removeAll();
055:
056: // the actual inference rules
057: knowledge.add(Person.getRule("isGrandFatherOf", "x", "z",
058: "isFatherOf", "y", "z", "isFatherOf", "x", "y"));
059: knowledge.add(Person.getRule("isOncleOf", "x", "z",
060: "isFatherOf", "y", "z", "isBrotherOf", "x", "y"));
061: knowledge.add(Person.getRule("isOncleOf", "x", "z",
062: "isGrandFatherOf", "y", "z", "isBrotherOf", "x", "y"));
063: knowledge.add(Person.getRule("isGrandFatherOf", "z", "x",
064: "isFatherOf", "y", "x", "isFatherOf", "z", "y"));
065:
066: // rules defining predicates
067: knowledge.add(Person.getRule("isFatherOf", "x", "y", "equals",
068: "x", "father(y)"));
069: knowledge.add(Person.getRule("isBrotherOf", "x", "y", "equals",
070: "z", "father(y)", "equals", "z", "father(x)",
071: "equalsNot", "x", "y"));
072:
073: // facts
074: knowledge
075: .add(Person.getFact("equals", "Klaus", "father(Jens)"));
076: knowledge
077: .add(Person.getFact("equals", "Otto", "father(Klaus)"));
078: knowledge.add(Person.getFact("equals", "Otto", "father(Lutz)"));
079: knowledge.add(Person.getFact("equals", "Jens", "father(Max)"));
080:
081: // facts just loop and add for all possible combinations either an equal or equals not fact
082: java.util.Vector names = new java.util.Vector();
083:
084: names.addElement(Person.get("Max"));
085: names.addElement(Person.get("Jens"));
086: names.addElement(Person.get("Klaus"));
087: names.addElement(Person.get("Otto"));
088: names.addElement(Person.get("Lutz"));
089:
090: try {
091: ClauseSet cs = new org.mandarax.kernel.meta.EqualsClauseSet(
092: names, true);
093: knowledge.add(cs);
094: } catch (Throwable t) {
095: System.err.println(t.getMessage());
096: }
097:
098: // knowledge.add(Person.getFact("isBrotherOf","Lutz","Klaus"));
099: }
100:
101: /**
102: * Get a description of this test case.
103: * This is used by the <code>org.mandarax.demo</code>
104: * package to display the test cases.
105: * @return a brief description of the test case
106: */
107: public String getDescription() {
108: StringBuffer buf = new StringBuffer();
109:
110: buf
111: .append("Same as FamilySample6, but use a JClauseSet to build the notEquals dynamically\n");
112: buf
113: .append("Note that this example does not run correctly in an applet environment using\n");
114: buf
115: .append("the default security settings since the dynamic invokation of a java method\n");
116: buf
117: .append("leads to a security exception. Since this exception is captured the program continues\n");
118: buf
119: .append("but the knowledge base does not contain all facts required\n");
120: buf.append("Run this sample in an application environment!\n");
121:
122: return new String(buf);
123: }
124:
125: /**
126: * Get the name of the person we are looking for.
127: * More precisely, this is the name of the person expected to
128: * replace the query variable as a result of the query.
129: * @return the name of the person
130: */
131: String getPersonName() {
132: return "Lutz";
133: }
134:
135: /**
136: * Get the query.
137: * @return a query
138: */
139: public Query getQuery() {
140: return Person.getQuery("isOncleOf", QUERY_VARIABLE, "Max");
141: }
142: }
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