Examples of org.drools.definition.type.FactType

org.drools.definition.type.FactType
FactType declarations are fact definitions (like classes) that are managed alongside the rules. You then communicate with the rulebase/knowledge base by using instances created by this. There are utility set and get methods on this, as well as in the FactFields. The Object that is used is a javabean (which was generated by the engine). You can also use reflection on it as normal. @author etirelli


        KnowledgeBase kbase = loadKnowledgeBaseFromString( str );


        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();


        FactType asgType = kbase.getFactType( "org.drools",
                                              "Assignment" );
        Object asg = asgType.newInstance();
        asgType.set( asg,
                     "source",
                     Object.class );
        asgType.set( asg,
                     "target",
                     Object.class );


        ksession.insert( asg );

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        KnowledgeBase kbase = loadKnowledgeBaseFromString( ruleFileContent1,
                                                           ruleFileContent2 );
        StatefulKnowledgeSession knowledgeSession = kbase.newStatefulKnowledgeSession();


        final FactType myDeclaredFactType = kbase.getFactType( "org.drools.integrationtests",
                                                               "MyDeclaredType" );
        Object myDeclaredFactInstance = myDeclaredFactType.newInstance();
        knowledgeSession.insert( myDeclaredFactInstance );


        int rulesFired = knowledgeSession.fireAllRules();


        assertEquals( 1,

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                "end\n";


        KnowledgeBase kbase = loadKnowledgeBaseFromString( str );
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
    
    FactType typeA = kbase.getFactType( "org.drools.test", "A" );
        Object a = typeA.newInstance();
        typeA.set( a, "field", "12" );
        ksession.insert( a );


        assertEquals(1, ksession.fireAllRules());
    }

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        KnowledgeBaseConfiguration kBaseConfig = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
        kBaseConfig.setOption(EventProcessingOption.STREAM);
        KnowledgeBase kbase = loadKnowledgeBaseFromString(kBaseConfig, str);
        StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();


        FactType eventType = kbase.getFactType("org.drools.test", "Event");


        Object event = eventType.newInstance();
        eventType.set(event, "name", "myName");
        ksession.insert( event );


        ksession.fireUntilHalt();
    }

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    @Test
    public void testExtends() throws Exception {
        //Test Base Fact Type
        StatefulKnowledgeSession ksession = genSession("test_Extends.drl");


        FactType person = ksession.getKnowledgeBase().getFactType("defaultpkg","Person");
        FactType eqPair = ksession.getKnowledgeBase().getFactType("defaultpkg","EqualityPair");


        Object p = person.newInstance();
        assertNotNull(p);


        ksession.insert("Populate");
        ksession.fireAllRules();


        // A Rule will generate 3 Persons, one with default constructor, two with field constructor
        // and 3 Students, which extends Person. One with default, one with field constructor
        assertEquals(6, ksession.getObjects(new ClassObjectFilter(person.getFactClass())).size());
        assertEquals(1+4+1+4,ksession.getObjects(new ClassObjectFilter(eqPair.getFactClass())).size());
        ksession.dispose();
    }

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    @Test
    public void testGeneratedMethods() throws Exception {
        StatefulKnowledgeSession ksession = genSession("test_Extends.drl");


        FactType student = ksession.getKnowledgeBase().getFactType("defaultpkg","Student");


        Constructor constructor = student.getFactClass().getConstructor(String.class,int.class,String.class);
        assertNotNull(constructor);
        Method equals = student.getFactClass().getMethod("equals",Object.class);
        assertNotNull(equals);


        Object s1 = constructor.newInstance("John",18,"Skool");
            assertNotNull(s1);
            assertEquals("Student( name=John, age=18, school=Skool )", s1.toString());

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    }


    @Test
    public void testDeepExt() throws Exception {
        StatefulKnowledgeSession ksession = genSession("test_Extends.drl");
        FactType LTstudent = ksession.getKnowledgeBase().getFactType("defaultpkg","LongTermStudent");


        Constructor constructor = LTstudent.getFactClass().getConstructor(String.class,int.class,String.class,String.class,int.class);
        assertNotNull(constructor);


        Object ls1 = constructor.newInstance("John",18,"Skool","C1245",4);
        Object ls2 = constructor.newInstance("John",33,"Skool","C1421",4);

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    @Test
    public void testExtendsLegacy() throws Exception {
        StatefulKnowledgeSession ksession = genSession("test_ExtLegacy.drl",0);


        FactType leg = ksession.getKnowledgeBase().getFactType("org.drools","BetterLegacy");
        assertNotNull(leg);


        Object b = leg.newInstance();


        assertEquals(3.3,leg.get(b,"doubleField"));
        assertNull(leg.get(b,"objField"));
        assertEquals(245,leg.get(b,"intField"));
        assertEquals("XX",leg.get(b,"strField"));
        assertEquals(true,leg.get(b,"prop"));
        assertEquals("Hello",leg.get(b,"oneMoreField"));


        System.out.println(b);


    }

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     public void testExtendsAcrossFiles() throws Exception {
        StatefulKnowledgeSession ksession = genSession(new String[] {"test_Ext1.drl","test_Ext2.drl","test_Ext3.drl","test_Ext4.drl"} ,0);


        FactType person = ksession.getKnowledgeBase().getFactType("org.drools.compiler.test","Person");
            assertNotNull(person);
        FactType student = ksession.getKnowledgeBase().getFactType("org.drools.compiler.test","Student");
            assertNotNull(student);


        FactType worker = ksession.getKnowledgeBase().getFactType("org.drools.compiler.anothertest","Worker");
            assertNotNull(worker);


        FactType ltss = ksession.getKnowledgeBase().getFactType("defaultpkg","SubLTStudent");
            assertNotNull(ltss);


        Constructor ctor = worker.getFactClass().getConstructor(String.class,int.class,String.class, double.class, int.class);
            assertNotNull(ctor);

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     public void testFieldInit() throws Exception {
        StatefulKnowledgeSession ksession = genSession("test_ExtFieldInit.drl");
        FactType test = ksession.getKnowledgeBase().getFactType("org.drools.compiler", "MyBean3");


        Object x = test.newInstance();
        assertNotNull(x);


        assertEquals(12,test.get(x,"fieldint"));
        assertEquals("xyz",test.get(x,"fieldstr"));
        assertEquals(3.23,test.get(x,"fielddbl"));
        assertEquals(0,test.get(x,"field0"));
        assertEquals(0.0f,test.get(x,"field1"));
        assertEquals(1.2f,test.get(x,"fieldflt"));
        short sht = 2;
        assertEquals(sht,test.get(x,"fieldsht"));
        assertEquals(0,test.get(x,"field2"));
        byte byt = 1;
        assertEquals(byt,test.get(x,"fieldbyt"));
        assertEquals(true,test.get(x,"fieldbln"));
        assertEquals('x',test.get(x,"fieldchr"));
        assertEquals(9999L,test.get(x,"fieldlng"));




        System.out.println(x);


    }

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