Examples of org.drools.ClassObjectFilter

org.drools.ClassObjectFilter
Filters Objects by Class, only accepting Classes of the specified type @author mproctor

        if (getSecurityContext() != null) {
            getSecurityContext().insert(identity.getUser());


            for (Role role : identity.getRoles()) {
                Iterator<?> iter = getSecurityContext().getObjects(
                        new ClassObjectFilter(Role.class)).iterator();


                boolean found = false;
                while (iter.hasNext()) {
                    Role r = (Role) iter.next();
                    if (r.equals(role)) {
                        found = true;
                        break;
                    }
                }


                if (!found) {
                    getSecurityContext().insert(role);
                }
            }


            for (Group group : identity.getGroups()) {
                Iterator<?> iter = getSecurityContext().getObjects(
                        new ClassObjectFilter(Group.class)).iterator();


                boolean found = false;
                while (iter.hasNext()) {
                    Group g = (Group) iter.next();
                    if (g.equals(group)) {
                        found = true;
                        break;
                    }
                }


                if (!found) {
                    getSecurityContext().insert(group);
                }
            }


            Iterator<?> iter = getSecurityContext().getObjects(
                    new ClassObjectFilter(Role.class)).iterator();
            while (iter.hasNext()) {
                Role r = (Role) iter.next();


                if (!identity.hasRole(r.getRoleType().getName(),
                        r.getGroup().getName(), r.getGroup().getGroupType())) {

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        workingMemory.insert( new Cheese( "stilton",
                                          10 ) );


        workingMemory.fireAllRules();


        Iterator events = workingMemory.iterateObjects( new ClassObjectFilter( PersonInterface.class ) );


        assertTrue( events.hasNext() );
        assertEquals( 1,
                      results.size() );
        assertEquals( results.get( 0 ),

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        if (summaryWorkingMemory == null) {
            return "  The workingMemory is null.";
        }
        Map<String, SummaryLine> summaryLineMap = new TreeMap<String, SummaryLine>();
        Iterator<ConstraintOccurrence> it = (Iterator<ConstraintOccurrence>) summaryWorkingMemory.iterateObjects(
                new ClassObjectFilter(ConstraintOccurrence.class));
        while (it.hasNext()) {
            ConstraintOccurrence occurrence = it.next();
            logger.trace("Adding ConstraintOccurrence ({})", occurrence);
            SummaryLine summaryLine = summaryLineMap.get(occurrence.getRuleId());
            if (summaryLine == null) {

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        this.kSession = kbase.newStatefulKnowledgeSession();
    }


    public Collection<ObjectType> getObjectTypesByRuleName(String ruleName) {
        Collection<Object> list = kSession.getObjects( new ClassObjectFilter( Integer.class ) );
        return new ArrayList( list );
    }

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        }
        DroolsScoreDirector uncorruptedDroolsScoreDirector = (DroolsScoreDirector) uncorruptedScoreDirector;
        Set<ConstraintOccurrence> workingConstraintOccurrenceSet = new LinkedHashSet<ConstraintOccurrence>();
        Iterator<ConstraintOccurrence> workingIt = (Iterator<ConstraintOccurrence>)
                workingMemory.iterateObjects(
                new ClassObjectFilter(ConstraintOccurrence.class));
        while (workingIt.hasNext()) {
            workingConstraintOccurrenceSet.add(workingIt.next());
        }
        Set<ConstraintOccurrence> uncorruptedConstraintOccurrenceSet = new LinkedHashSet<ConstraintOccurrence>();
        Iterator<ConstraintOccurrence> uncorruptedIt = (Iterator<ConstraintOccurrence>)
                uncorruptedDroolsScoreDirector.getWorkingMemory().iterateObjects(
                        new ClassObjectFilter(ConstraintOccurrence.class));
        while (uncorruptedIt.hasNext()) {
            uncorruptedConstraintOccurrenceSet.add(uncorruptedIt.next());
        };
        Set<Object> excessSet = new LinkedHashSet<Object>(workingConstraintOccurrenceSet);
        excessSet.removeAll(uncorruptedConstraintOccurrenceSet);

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        final FactHandle h = ksession.insert( c2 );
        ksession.insert( c3 );
        ksession.fireAllRules();


        // Check logical Insertions where made for c2 and c3        
        list = new ArrayList( ksession.getObjects( new ClassObjectFilter( Person.class ) ) );
        assertEquals( 2,
                      list.size() );
        assertFalse( list.contains( new Person( c1.getType() ) ) );
        assertTrue( list.contains( new Person( c2.getType() ) ) );
        assertTrue( list.contains( new Person( c3.getType() ) ) );


        // this rule will make a logical assertion for c1 too
        kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
        kbuilder.add( ResourceFactory.newClassPathResource( "test_LogicalInsertionsDynamicRule2.drl",
                                                            getClass() ),
                      ResourceType.DRL );
        if ( kbuilder.hasErrors() ) {
            fail( kbuilder.getErrors().toString() );
        }        
        Collection<KnowledgePackage> kpkgs2 = kbuilder.getKnowledgePackages();
        kbase.addKnowledgePackages( kpkgs2 );
        kbase = SerializationHelper.serializeObject( kbase );


        ksession.fireAllRules();


        kbase = ksession.getKnowledgeBase();


        // check all now have just one logical assertion each
        list = new ArrayList( ksession.getObjects( new ClassObjectFilter( Person.class ) ) );
        assertEquals( 3,
                      list.size() );
        assertTrue( list.contains( new Person( c1.getType() ) ) );
        assertTrue( list.contains( new Person( c2.getType() ) ) );
        assertTrue( list.contains( new Person( c3.getType() ) ) );


        // check the packages are correctly populated
        KnowledgePackage[] pkgs = (KnowledgePackage[]) kbase.getKnowledgePackages().toArray( new KnowledgePackage[]{} );
        assertEquals( "org.drools.test",
                      pkgs[0].getName() );
        assertEquals( "org.drools.test2",
                      pkgs[1].getName() );
        assertEquals( "rule1",
                      pkgs[0].getRules().iterator().next().getName() );
        assertEquals( "rule2",
                      pkgs[1].getRules().iterator().next().getName() );


        // now remove the first rule
        kbase.removeRule( pkgs[0].getName(),
                          pkgs[0].getRules().iterator().next().getName() );
        pkgs = (KnowledgePackage[]) kbase.getKnowledgePackages().toArray( new KnowledgePackage[]{} );


        // Check the rule was correctly remove
        assertEquals( 0,
                      pkgs[0].getRules().size() );
        assertEquals( 1,
                      pkgs[1].getRules().size() );
        assertEquals( "org.drools.test2",
                      pkgs[1].getName() );
        assertEquals( "rule2",
                      pkgs[1].getRules().iterator().next().getName() );


        list = new ArrayList( ksession.getObjects( new ClassObjectFilter( Person.class ) ) );
        assertEquals( "removal of the rule should result in retraction of c3's logical assertion",
                      2,
                      list.size() );
        assertTrue( "c1's logical assertion should not be retracted",
                    list.contains( new Person( c1.getType() ) ) );
        assertTrue( "c2's logical assertion should  not be retracted",
                    list.contains( new Person( c2.getType() ) ) );
        assertFalse( "c3's logical assertion should be  retracted",
                     list.contains( new Person( c3.getType() ) ) );


        c2.setPrice( 3 );
        ksession.update( h,
                         c2 );
        list = new ArrayList( ksession.getObjects( new ClassObjectFilter( Person.class ) ) );
        assertEquals( "c2 now has a higher price, its logical assertion should  be cancelled",
                      1,
                      list.size() );
        assertFalse( "The logical assertion cor c2 should have been retracted",
                     list.contains( new Person( c2.getType() ) ) );
        assertTrue( "The logical assertion  for c1 should exist",
                    list.contains( new Person( c1.getType() ) ) );


        pkgs = (KnowledgePackage[]) kbase.getKnowledgePackages().toArray( new KnowledgePackage[]{} );
        kbase.removeRule( pkgs[1].getName(),
                          pkgs[1].getRules().iterator().next().getName() );
        kbase = SerializationHelper.serializeObject( kbase );
        pkgs = (KnowledgePackage[]) kbase.getKnowledgePackages().toArray( new KnowledgePackage[]{} );
        assertEquals( 0,
                      pkgs[0].getRules().size() );
        assertEquals( 0,
                      pkgs[1].getRules().size() );
        list = new ArrayList( ksession.getObjects( new ClassObjectFilter( Person.class ) ) );
        assertEquals( 0,
                      list.size() );
    }

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        final Cheese cheese2 = new Cheese( cheese1.getType(),
                                           1 );


        final FactHandle h1 = session.insert( cheese1 );
        session.fireAllRules();
        Collection< ? > list = session.getObjects( new ClassObjectFilter( cheese1.getType().getClass() ) );
        assertEquals( 1,
                      list.size() );
        // probably dangerous, as contains works with equals, not identity
        assertEquals( cheese1.getType(),
                      list.iterator().next() );
        // FactHandle ht = workingMemory.getFactHandle(c1.getType());


        final FactHandle h2 = session.insert( cheese2 );
        session.fireAllRules();
        list = session.getObjects( new ClassObjectFilter( cheese1.getType().getClass() ) );
        assertEquals( 1,
                      list.size() );
        assertEquals( cheese1.getType(),
                      list.iterator().next() );


        assertEquals( 3,
                      session.getObjects().size() );


        session.retract( h1 );
        session.fireAllRules();
        list = session.getObjects( new ClassObjectFilter( cheese1.getType().getClass() ) );
        assertEquals( "cheese-type " + cheese1.getType() + " was retracted, but should not. Backed by cheese2 => type.",
                      1,
                      list.size() );
        assertEquals( "cheese-type " + cheese1.getType() + " was retracted, but should not. Backed by cheese2 => type.",
                      cheese1.getType(),
                      list.iterator().next() );


        session.retract( h2 );
        session.fireAllRules();
        list = session.getObjects( new ClassObjectFilter( cheese1.getType().getClass() ) );
        assertEquals( "cheese-type " + cheese1.getType() + " was not retracted, but should have. Neither  cheese1 => type nor cheese2 => type is true.",
                      0,
                      list.size() );
    }

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        session.setGlobal( "b",
                           b );


        FactHandle h1 = session.insert( a );
        session.fireAllRules();
        Collection< ? > list = session.getObjects( new ClassObjectFilter( a.getClass() ) );
        assertEquals( 2,
                      list.size() );
        assertTrue( list.contains( a ) );
        assertTrue( list.contains( b ) );


        session.retract( h1 );
        session.fireAllRules();
        list = session.getObjects( new ClassObjectFilter( a.getClass() ) );
        assertEquals( "b was retracted, but it should not have. Is backed by b => b being true.",
                      1,
                      list.size() );
        assertEquals( "b was retracted, but it should not have. Is backed by b => b being true.",
                      b,
                      list.iterator().next() );


        h1 = session.getFactHandle( b );
        session.retract( h1 );
        session.fireAllRules();
        list = session.getObjects( new ClassObjectFilter( a.getClass() ) );
        assertEquals( 0,
                      list.size() );
    }

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                           a );
        session.setGlobal( "l",
                           l );


        session.fireAllRules();
        Collection< ? > list = session.getObjects( new ClassObjectFilter( a.getClass() ) );
        assertEquals( "a still asserted.",
                      0,
                      list.size() );
        assertEquals( "Rule has not fired (looped) expected number of times",
                      10,

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                                 a );
        workingMemory.setGlobal( "l",
                                 l );


        workingMemory.fireAllRules();
        list = IteratorToList.convert( workingMemory.iterateObjects( new ClassObjectFilter( a.getClass() ) ) );
        assertEquals( "a still in WM",
                      0,
                      list.size() );
        assertEquals( "Rule should not loop",
                      1,

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