97 lines
2.7 KiB
Java
97 lines
2.7 KiB
Java
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package jpl.test;
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import jpl.Atom;
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import jpl.Query;
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import jpl.Term;
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import jpl.Variable;
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public class Family extends Thread {
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int id; // client thread id
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private static final int delay = 0;
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Family(int i) {
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this.id = i;
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}
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public static void main(String argv[]) {
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Query q1 = new Query("consult", new Term[] { new Atom("jpl/test/family.pl")});
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System.err.println("consult " + (q1.hasSolution() ? "succeeded" : "failed"));
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for (int i = 0; i < 20; i++) {
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System.out.println("spawning client[" + i + "]");
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new Family(i).start();
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}
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}
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public void run() {
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java.util.Hashtable solution;
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Variable X = new Variable("X");
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//--------------------------------------------------
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Query q2 = new Query("child_of", new Term[] { new Atom("joe"), new Atom("ralf")});
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System.err.println("child_of(joe,ralf) is " + (q2.hasSolution() ? "provable" : "not provable"));
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new Query("sleep", new Term[] { new jpl.Integer(delay)}).hasSolution();
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//--------------------------------------------------
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Query q3 = new Query("descendent_of", new Term[] { new Atom("steve"), new Atom("ralf")});
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System.err.println("descendent_of(steve,ralf) is " + (q3.hasSolution() ? "provable" : "not provable"));
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new Query("sleep", new Term[] { new jpl.Integer(delay)}).hasSolution();
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//--------------------------------------------------
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Query q4 = new Query("descendent_of", new Term[] { X, new Atom("ralf")});
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solution = q4.oneSolution();
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System.err.println("first solution of descendent_of(X, ralf)");
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System.err.println("X = " + solution.get(X.name));
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new Query("sleep", new Term[] { new jpl.Integer(delay)}).hasSolution();
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//--------------------------------------------------
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java.util.Hashtable[] solutions = q4.allSolutions();
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System.err.println("all solutions of descendent_of(X, ralf)");
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for (int i = 0; i < solutions.length; i++) {
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System.err.println("X = " + solutions[i].get(X.name));
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}
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new Query("sleep", new Term[] { new jpl.Integer(delay)}).hasSolution();
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//--------------------------------------------------
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System.err.println("each solution of descendent_of(X, ralf)");
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while (q4.hasMoreSolutions()) {
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solution = q4.nextSolution();
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System.err.println("X = " + solution.get(X.name));
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}
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new Query("sleep", new Term[] { new jpl.Integer(delay)}).hasSolution();
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//--------------------------------------------------
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Variable Y = new Variable("Y");
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Query q5 = new Query("descendent_of", new Term[] { X, Y });
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System.err.println(id + ": each solution of descendent_of(X, Y)");
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while (q5.hasMoreSolutions()) {
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solution = q5.nextSolution();
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System.err.println(id + ": X = " + solution.get(X.name) + ", Y = " + solution.get(Y.name));
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new Query("sleep", new Term[] { new jpl.Integer(delay)}).hasSolution();
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}
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}
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}
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