Examples with KnowledgeHelper org.drools.core.spi.KnowledgeHelper used on opensource projects

Example 6 with KnowledgeHelper

use of org.drools.core.spi.KnowledgeHelper in project drools by kiegroup.

the class BaseMannersTest method getAllDone.

/**
 * <pre>
 * rule all_done() {
 *     Context context;
 *     when {
 *         context : Context( state == Context.PRINT_RESULTS )
 *     } then {
 *     }
 * }
 * </pre>
 *
 * @return
 * @throws InvalidRuleException
 */
private RuleImpl getAllDone() throws InvalidRuleException {
    final RuleImpl rule = new RuleImpl("alldone");
    // -----------
    // context : Context( state == Context.PRINT_RESULTS )
    // -----------
    final Pattern contextPattern = new Pattern(0, this.contextType);
    contextPattern.addConstraint(getLiteralConstraint(contextPattern, "state", Context.PRINT_RESULTS));
    rule.addPattern(contextPattern);
    final Declaration contextDeclaration = rule.getDeclaration("context");
    // ------------
    // 
    // ------------
    final Consequence consequence = new Consequence() {

        public void evaluate(KnowledgeHelper drools, WorkingMemory workingMemory) throws ConsequenceException {
            try {
                System.err.println("all done");
            } catch (Exception e) {
                throw new ConsequenceException(e);
            }
        }

        public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        }

        public void writeExternal(ObjectOutput out) throws IOException {
        }

        public String getName() {
            return "default";
        }
    };
    rule.setConsequence(consequence);
    return rule;
}

Example 7 with KnowledgeHelper

use of org.drools.core.spi.KnowledgeHelper in project drools by kiegroup.

the class BaseMannersTest method getMakePath.

/**
 * <pre>
 *    rule makePath() {
 *        Context context;
 *        int seatingId, seatingPid, pathSeat;
 *        String pathGuestName;
 *
 *        when {
 *            Context( state == Context.MAKE_PATH )
 *            Seating( seatingId:id, seatingPid:pid, pathDone == false )
 *            Path( id == seatingPid, pathGuestName:guest, pathSeat:seat )
 *            (not Path( id == seatingId, guestName == pathGuestName )
 *        } else {
 *            drools.assert( new Path( seatingId, pathSeat, pathGuestName ) );
 *
 *        }
 *    }
 * </pre>
 *
 * @return
 * @throws InvalidRuleException
 */
private RuleImpl getMakePath() throws InvalidRuleException {
    final RuleImpl rule = new RuleImpl("makePath");
    // -----------
    // context : Context( state == Context.MAKE_PATH )
    // -----------
    final Pattern contextPattern = new Pattern(0, this.contextType);
    contextPattern.addConstraint(getLiteralConstraint(contextPattern, "state", Context.MAKE_PATH));
    rule.addPattern(contextPattern);
    // ---------------
    // Seating( seatingId:id, seatingPid:pid, pathDone == false )
    // ---------------
    final Pattern seatingPattern = new Pattern(1, this.seatingType);
    setFieldDeclaration(seatingPattern, "id", "seatingId");
    setFieldDeclaration(seatingPattern, "pid", "seatingPid");
    seatingPattern.addConstraint(getLiteralConstraint(seatingPattern, "pathDone", false));
    rule.addPattern(seatingPattern);
    final Declaration seatingIdDeclaration = rule.getDeclaration("seatingId");
    final Declaration seatingPidDeclaration = rule.getDeclaration("seatingPid");
    // -----------
    // Path( id == seatingPid, pathGuestName:guestName, pathSeat:seat )
    // -----------
    final Pattern pathPattern = new Pattern(2, this.pathType);
    pathPattern.addConstraint(getBoundVariableConstraint(pathPattern, "id", seatingPidDeclaration, "=="));
    setFieldDeclaration(pathPattern, "guestName", "pathGuestName");
    setFieldDeclaration(pathPattern, "seat", "pathSeat");
    rule.addPattern(pathPattern);
    final Declaration pathGuestNameDeclaration = rule.getDeclaration("pathGuestName");
    final Declaration pathSeatDeclaration = rule.getDeclaration("pathSeat");
    // -------------
    // (not Path( id == seatingId, guestName == pathGuestName )
    // -------------
    final Pattern notPathPattern = new Pattern(3, this.pathType);
    notPathPattern.addConstraint(getBoundVariableConstraint(notPathPattern, "id", seatingIdDeclaration, "=="));
    notPathPattern.addConstraint(getBoundVariableConstraint(notPathPattern, "guestName", pathGuestNameDeclaration, "=="));
    final GroupElement not = GroupElementFactory.newNotInstance();
    not.addChild(notPathPattern);
    rule.addPattern(not);
    // ------------
    // drools.assert( new Path( id, pathName, pathSeat ) );
    // ------------
    final Consequence consequence = new Consequence() {

        public void evaluate(KnowledgeHelper drools, WorkingMemory workingMemory) throws ConsequenceException {
            try {
                RuleImpl rule = drools.getRule();
                LeftTuple tuple = (LeftTuple) drools.getTuple();
                int id = seatingIdDeclaration.getExtractor().getIntValue((InternalWorkingMemory) workingMemory, tuple.get(seatingIdDeclaration).getObject());
                int seat = pathSeatDeclaration.getExtractor().getIntValue((InternalWorkingMemory) workingMemory, tuple.get(pathSeatDeclaration).getObject());
                String guestName = (String) drools.get(pathGuestNameDeclaration);
                Path path = new Path(id, seat, guestName);
                drools.insert(path);
            // System.err.println( "make path : " + path );
            } catch (Exception e) {
                e.printStackTrace();
                throw new ConsequenceException(e);
            }
        }

        public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        }

        public void writeExternal(ObjectOutput out) throws IOException {
        }

        public String getName() {
            return "default";
        }
    };
    rule.setConsequence(consequence);
    return rule;
}

Example 8 with KnowledgeHelper

use of org.drools.core.spi.KnowledgeHelper in project drools by kiegroup.

the class BaseMannersTest method getAreWeDone.

/**
 * <pre>
 * rule areWeDone() {
 *     Context context; LastSeat lastSear;
 *     when {
 *         context : Context( state == Context.CHECK_DONE )
 *         LastSeat( lastSeat: seat )
 *         Seating( rightSeat == lastSeat )
 *     } then {
 *         context.setState(Context.PRINT_RESULTS );
 *     }
 * }
 * </pre>
 *
 * @return
 * @throws InvalidRuleException
 */
private RuleImpl getAreWeDone() throws InvalidRuleException {
    final RuleImpl rule = new RuleImpl("areWeDone");
    // -----------
    // context : Context( state == Context.CHECK_DONE )
    // -----------
    final Pattern contextPattern = new Pattern(0, this.contextType, "context");
    contextPattern.addConstraint(getLiteralConstraint(contextPattern, "state", Context.CHECK_DONE));
    rule.addPattern(contextPattern);
    final Declaration contextDeclaration = rule.getDeclaration("context");
    // ---------------
    // LastSeat( lastSeat: seat )
    // ---------------
    final Pattern lastSeatPattern = new Pattern(1, this.lastSeatType);
    setFieldDeclaration(lastSeatPattern, "seat", "lastSeat");
    rule.addPattern(lastSeatPattern);
    final Declaration lastSeatDeclaration = rule.getDeclaration("lastSeat");
    // -------------
    // Seating( rightSeat == lastSeat )
    // -------------
    final Pattern seatingPattern = new Pattern(2, this.seatingType, null);
    seatingPattern.addConstraint(getBoundVariableConstraint(seatingPattern, "rightSeat", lastSeatDeclaration, "=="));
    rule.addPattern(seatingPattern);
    // ------------
    // context.setName( Context.PRINT_RESULTS );
    // ------------
    final Consequence consequence = new Consequence() {

        public void evaluate(KnowledgeHelper drools, WorkingMemory workingMemory) throws ConsequenceException {
            try {
                RuleImpl rule = drools.getRule();
                LeftTuple tuple = (LeftTuple) drools.getTuple();
                Context context = (Context) drools.get(contextDeclaration);
                context.setState(Context.PRINT_RESULTS);
                drools.update(tuple.get(contextDeclaration), context);
            // System.err.println( "We Are Done!!!" );
            } catch (Exception e) {
                throw new ConsequenceException(e);
            }
        }

        public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        }

        public void writeExternal(ObjectOutput out) throws IOException {
        }

        public String getName() {
            return "default";
        }
    };
    rule.setConsequence(consequence);
    return rule;
}

Example 9 with KnowledgeHelper

use of org.drools.core.spi.KnowledgeHelper in project drools by kiegroup.

the class CrossProductTest method setUp.

@Before
public void setUp() throws Exception {
    final ObjectType list1ObjectType = new ClassObjectType(String.class);
    final ObjectType list2ObjectType = new ClassObjectType(String.class);
    final RuleImpl rule = new RuleImpl("rule-1");
    final Pattern list1Pattern = new Pattern(0, list1ObjectType, "s1");
    final Pattern list2Pattern = new Pattern(1, list2ObjectType, "s2");
    rule.addPattern(list1Pattern);
    rule.addPattern(list2Pattern);
    final Declaration s1Declaration = rule.getDeclaration("s1");
    final Declaration s2Declaration = rule.getDeclaration("s2");
    this.values = new ArrayList();
    rule.setConsequence(new Consequence() {

        private static final long serialVersionUID = 510l;

        public void evaluate(final KnowledgeHelper knowledgeHelper, final WorkingMemory workingMemory) throws Exception {
            final String s1 = (String) knowledgeHelper.get(s1Declaration);
            final String s2 = (String) knowledgeHelper.get(s2Declaration);
            CrossProductTest.this.values.add(new String[] { s1, s2 });
        }

        public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        }

        public void writeExternal(ObjectOutput out) throws IOException {
        }

        public String getName() {
            return "default";
        }
    });
    this.pkg = new KnowledgePackageImpl("org.drools");
    this.pkg.addRule(rule);
}

Example 10 with KnowledgeHelper

use of org.drools.core.spi.KnowledgeHelper in project drools by kiegroup.

the class ReteooRuleBuilderTest method testAddRuleWithPatterns.

@Test
public void testAddRuleWithPatterns() {
    final RuleImpl rule = new RuleImpl("only patterns");
    final Pattern c1 = new Pattern(0, new ClassObjectType(String.class));
    final Pattern c2 = new Pattern(1, new ClassObjectType(String.class));
    final Pattern c3 = new Pattern(2, new ClassObjectType(String.class));
    final GroupElement lhsroot = GroupElementFactory.newAndInstance();
    lhsroot.addChild(c1);
    lhsroot.addChild(c2);
    lhsroot.addChild(c3);
    rule.setLhs(lhsroot);
    final Consequence consequence = new Consequence() {

        public void evaluate(KnowledgeHelper knowledgeHelper, WorkingMemory workingMemory) throws Exception {
            System.out.println("Consequence!");
        }

        public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
        }

        public void writeExternal(ObjectOutput out) throws IOException {
        }

        public String getName() {
            return "default";
        }
    };
    rule.setConsequence(consequence);
    final List terminals = this.builder.addRule(rule, this.rulebase);
    assertEquals("Rule must have a single terminal node", 1, terminals.size());
    final RuleTerminalNode terminal = (RuleTerminalNode) terminals.get(0);
}