@Test
public void testNullSafeNullComparisonReverse() {
// DROOLS-82
String str =
"import org.drools.compiler.*;\n"
+ "rule R1 when\n"
+ " Person( \"Main Street\".equalsIgnoreCase(address!.street) )\n"
+ "then\n"
+ "end";
KnowledgeBase kbase = loadKnowledgeBaseFromString(str);
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(new Person("Mario", 38));
Person mark = new Person("Mark", 37);
mark.setAddress(new Address("Main Street"));
ksession.insert(mark);
Person edson = new Person("Edson", 34);
edson.setAddress(new Address(null));
ksession.insert(edson);
assertEquals(1, ksession.fireAllRules());
ksession.dispose();
}
@Test
public void testDoubleNullSafe() {
String str =
"import org.drools.compiler.*;\n"
+ "rule R1 when\n"
+ " Person( address!.street!.length > 15 ) \n"
+ "then\n"
+ "end";
KnowledgeBase kbase = loadKnowledgeBaseFromString(str);
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(new Person("Mario", 38));
Person mark = new Person("Mark", 37);
mark.setAddress(new Address("Main Street"));
ksession.insert(mark);
Person edson = new Person("Edson", 34);
edson.setAddress(new Address(null));
ksession.insert(edson);
Person alex = new Person("Alex", 34);
alex.setAddress(new Address("The Main Very Big Street"));
ksession.insert(alex);
assertEquals(1, ksession.fireAllRules());
ksession.dispose();
}
@Test
public void testNullSafeBinding() {
String str =
"import org.drools.compiler.*;\n"
+ "rule R1 when\n"
+ " Person( $streetName : address!.street ) \n"
+ "then\n"
+ "end";
KnowledgeBase kbase = loadKnowledgeBaseFromString(str);
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(new Person("Mario", 38));
Person mark = new Person("Mark", 37);
mark.setAddress(new Address("Main Street"));
ksession.insert(mark);
Person edson = new Person("Edson", 34);
edson.setAddress(new Address(null));
ksession.insert(edson);
assertEquals(2, ksession.fireAllRules());
ksession.dispose();
}
@Test
public void testNewConstructor() {
String str =
""
+ "package org.drools.compiler.test \n"
+ "import "
+ Person.class.getCanonicalName()
+ "\n"
+ "import "
+ Address.class.getCanonicalName()
+ "\n"
+ "global java.util.List list \n"
+ "rule \"show\" \n"
+ "when \n"
+ " $m : Person( address == new Address('s1')) \n"
+ "then \n"
+ " list.add('r1'); \n"
+ "end \n";
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newByteArrayResource(str.getBytes()), ResourceType.DRL);
if (kbuilder.hasErrors()) {
fail(kbuilder.getErrors().toString());
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
StatefulKnowledgeSession ksession = createKnowledgeSession(kbase);
List list = new ArrayList();
ksession.setGlobal("list", list);
Person p = new Person("yoda");
p.setAddress(new Address("s1"));
ksession.insert(p);
ksession.fireAllRules();
assertEquals("r1", list.get(0));
// Check it was built with MVELReturnValueExpression constraint
List<ObjectTypeNode> nodes = ((InternalKnowledgeBase) kbase).getRete().getObjectTypeNodes();
ObjectTypeNode node = null;
for (ObjectTypeNode n : nodes) {
if (((ClassObjectType) n.getObjectType()).getClassType() == Person.class) {
node = n;
break;
}
}
AlphaNode alphanode = (AlphaNode) node.getSinkPropagator().getSinks()[0];
AlphaNodeFieldConstraint constraint = alphanode.getConstraint();
if (constraint instanceof MvelConstraint) {
assertTrue(((MvelConstraint) constraint).getFieldExtractor() instanceof ClassFieldReader);
FieldValue r = ((MvelConstraint) constraint).getField();
assertEquals(p.getAddress(), r.getValue());
}
}
@Test
public void testMixedNullSafes() {
String str =
"import org.drools.compiler.*;\n"
+ "rule R1 when\n"
+ " $p : Person( "
+ " address!.street!.length > 0 && ( address!.street!.length < 15 || > 20 && < 30 ) "
+ " && address!.zipCode!.length > 0 && address.zipCode == \"12345\" "
+ " ) \n"
+ "then\n"
+ " System.out.println( $p ); \n"
+ "end";
KnowledgeBase kbase = loadKnowledgeBaseFromString(str);
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ksession.insert(new Person("Mario", 38));
Person mark = new Person("Mark", 37);
mark.setAddress(new Address("Main Street", null, "12345"));
ksession.insert(mark);
Person edson = new Person("Edson", 34);
edson.setAddress(new Address(null));
ksession.insert(edson);
Person alex = new Person("Alex", 34);
alex.setAddress(new Address("The Main Verrry Long Street"));
ksession.insert(alex);
Person frank = new Person("Frank", 24);
frank.setAddress(new Address("Long Street number 21", null, "12345"));
ksession.insert(frank);
assertEquals(2, ksession.fireAllRules());
ksession.dispose();
}