use of org.drools.mvel.builder.MVELConsequenceBuilder in project drools by kiegroup.
the class MVELConsequenceBuilderTest method testImperativeCodeError.
@Test
public void testImperativeCodeError() throws Exception {
InternalKnowledgePackage pkg = CoreComponentFactory.get().createKnowledgePackage("pkg1");
final RuleDescr ruleDescr = new RuleDescr("rule 1");
ruleDescr.setConsequence("if (cheese.price == 10) { cheese.price = 5; }");
Properties properties = new Properties();
properties.setProperty("drools.dialect.default", "mvel");
KnowledgeBuilderConfigurationImpl cfg1 = new KnowledgeBuilderConfigurationImpl(properties);
KnowledgeBuilderImpl pkgBuilder = new KnowledgeBuilderImpl(pkg, cfg1);
PackageRegistry pkgRegistry = pkgBuilder.getPackageRegistry(pkg.getName());
DialectCompiletimeRegistry dialectRegistry = pkgBuilder.getPackageRegistry(pkg.getName()).getDialectCompiletimeRegistry();
MVELDialect mvelDialect = (MVELDialect) dialectRegistry.getDialect(pkgRegistry.getDialect());
final RuleBuildContext context = new RuleBuildContext(pkgBuilder, ruleDescr, dialectRegistry, pkg, mvelDialect);
final InstrumentedDeclarationScopeResolver declarationResolver = new InstrumentedDeclarationScopeResolver();
final ObjectType cheeseObjeectType = new ClassObjectType(Cheese.class);
final Pattern pattern = new Pattern(0, cheeseObjeectType);
final PatternExtractor extractor = new PatternExtractor(cheeseObjeectType);
final Declaration declaration = new Declaration("cheese", extractor, pattern);
final Map<String, Declaration> map = new HashMap<String, Declaration>();
map.put("cheese", declaration);
declarationResolver.setDeclarations(map);
context.setDeclarationResolver(declarationResolver);
final MVELConsequenceBuilder builder = new MVELConsequenceBuilder();
builder.build(context, RuleImpl.DEFAULT_CONSEQUENCE_NAME);
InternalKnowledgeBase kBase = KnowledgeBaseFactory.newKnowledgeBase();
StatefulKnowledgeSessionImpl ksession = (StatefulKnowledgeSessionImpl) kBase.newKieSession();
final Cheese cheddar = new Cheese("cheddar", 10);
final InternalFactHandle f0 = (InternalFactHandle) ksession.insert(cheddar);
final LeftTupleImpl tuple = new LeftTupleImpl(f0, null, true);
final AgendaItem item = new AgendaItemImpl(0, tuple, 10, null, null, null);
final DefaultKnowledgeHelper kbHelper = new DefaultKnowledgeHelper(ksession);
kbHelper.setActivation(item);
try {
((MVELConsequence) context.getRule().getConsequence()).compile((MVELDialectRuntimeData) pkgBuilder.getPackageRegistry(pkg.getName()).getDialectRuntimeRegistry().getDialectData("mvel"));
context.getRule().getConsequence().evaluate(kbHelper, ksession);
fail("should throw an exception, as 'if' is not allowed");
} catch (Exception e) {
}
assertEquals(10, cheddar.getPrice());
}
use of org.drools.mvel.builder.MVELConsequenceBuilder in project drools by kiegroup.
the class MVELConsequenceBuilderTest method setupTest.
private void setupTest(String consequence, Map<String, Object> namedConsequences) {
builder = new MVELConsequenceBuilder();
InternalKnowledgePackage pkg = CoreComponentFactory.get().createKnowledgePackage("org.drools.mvel.compiler.test");
pkg.addImport(new ImportDeclaration(Cheese.class.getCanonicalName()));
KnowledgeBuilderConfigurationImpl conf = new KnowledgeBuilderConfigurationImpl();
KnowledgeBuilderImpl pkgBuilder = new KnowledgeBuilderImpl(pkg, conf);
ruleDescr = new RuleDescr("test consequence builder");
ruleDescr.setConsequence(consequence);
ruleDescr.addAttribute(new AttributeDescr("dialect", "mvel"));
for (Entry<String, Object> entry : namedConsequences.entrySet()) {
ruleDescr.addNamedConsequences(entry.getKey(), entry.getValue());
}
RuleImpl rule = new RuleImpl(ruleDescr.getName());
rule.addPattern(new Pattern(0, new ClassObjectType(Cheese.class), "$cheese"));
rule.addPattern(new Pattern(0, new ClassObjectType(Map.class), "$map"));
PackageRegistry pkgRegistry = pkgBuilder.getPackageRegistry(pkg.getName());
DialectCompiletimeRegistry reg = pkgBuilder.getPackageRegistry(pkg.getName()).getDialectCompiletimeRegistry();
context = new RuleBuildContext(pkgBuilder, ruleDescr, reg, pkg, reg.getDialect(pkgRegistry.getDialect()));
context.getDeclarationResolver().pushOnBuildStack(rule.getLhs());
context.getDialect().getConsequenceBuilder().build(context, RuleImpl.DEFAULT_CONSEQUENCE_NAME);
for (String name : namedConsequences.keySet()) {
context.getDialect().getConsequenceBuilder().build(context, name);
}
context.getDialect().addRule(context);
pkgRegistry.getPackage().addRule(context.getRule());
pkgBuilder.compileAll();
pkgBuilder.reloadAll();
if (pkgBuilder.hasErrors()) {
fail(pkgBuilder.getErrors().toString());
}
}
use of org.drools.mvel.builder.MVELConsequenceBuilder in project drools by kiegroup.
the class MVELConsequenceBuilderTest method testSimpleExpression.
@Test
public void testSimpleExpression() throws Exception {
PackageDescr pkgDescr = new PackageDescr("pkg1");
KnowledgeBuilderImpl pkgBuilder = new KnowledgeBuilderImpl();
pkgBuilder.addPackage(pkgDescr);
InternalKnowledgePackage pkg = pkgBuilder.getPackageRegistry("pkg1").getPackage();
final RuleDescr ruleDescr = new RuleDescr("rule 1");
ruleDescr.setNamespace("pkg1");
ruleDescr.setConsequence("modify (cheese) {price = 5 };\nretract (cheese)");
DialectCompiletimeRegistry dialectRegistry = pkgBuilder.getPackageRegistry(pkg.getName()).getDialectCompiletimeRegistry();
MVELDialect mvelDialect = (MVELDialect) dialectRegistry.getDialect("mvel");
final RuleBuildContext context = new RuleBuildContext(pkgBuilder, ruleDescr, dialectRegistry, pkg, mvelDialect);
final InstrumentedDeclarationScopeResolver declarationResolver = new InstrumentedDeclarationScopeResolver();
final ObjectType cheeseObjeectType = new ClassObjectType(Cheese.class);
final Pattern pattern = new Pattern(0, cheeseObjeectType, "cheese");
final GroupElement subrule = new GroupElement(GroupElement.AND);
subrule.addChild(pattern);
final Map<String, Declaration> map = new HashMap<String, Declaration>();
map.put("cheese", pattern.getDeclaration());
declarationResolver.setDeclarations(map);
context.setDeclarationResolver(declarationResolver);
final MVELConsequenceBuilder builder = new MVELConsequenceBuilder();
builder.build(context, RuleImpl.DEFAULT_CONSEQUENCE_NAME);
InternalKnowledgeBase kBase = KnowledgeBaseFactory.newKnowledgeBase();
PropagationContextFactory pctxFactory = RuntimeComponentFactory.get().getPropagationContextFactory();
kBase.addPackage(pkg);
StatefulKnowledgeSessionImpl ksession = (StatefulKnowledgeSessionImpl) kBase.newKieSession();
BuildContext buildContext = new BuildContext(kBase, Collections.emptyList());
MockTupleSource source = new MockTupleSource(1, buildContext);
source.setObjectCount(1);
RuleTerminalNode rtn = new RuleTerminalNode(0, source, context.getRule(), subrule, 0, buildContext);
final Cheese cheddar = new Cheese("cheddar", 10);
final InternalFactHandle f0 = (InternalFactHandle) ksession.insert(cheddar);
final LeftTupleImpl tuple = new LeftTupleImpl(f0, rtn, true);
f0.removeLeftTuple(tuple);
final AgendaItem item = new AgendaItemImpl(0, tuple, 10, pctxFactory.createPropagationContext(1, PropagationContext.Type.DELETION, null, null, null), rtn, null);
final DefaultKnowledgeHelper kbHelper = new DefaultKnowledgeHelper(ksession);
kbHelper.setActivation(item);
((MVELConsequence) context.getRule().getConsequence()).compile((MVELDialectRuntimeData) pkgBuilder.getPackageRegistry(pkg.getName()).getDialectRuntimeRegistry().getDialectData("mvel"));
context.getRule().getConsequence().evaluate(kbHelper, ksession);
assertEquals(5, cheddar.getPrice());
}
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