Examples with RuleTerminalNode org.drools.core.reteoo.RuleTerminalNode used on opensource projects

Example 56 with RuleTerminalNode

use of org.drools.core.reteoo.RuleTerminalNode in project drools by kiegroup.

the class ActivationIterator method next.

public Object next() {
    Activation acc = null;
    if (this.currentTuple != null) {
        Object obj = currentTuple.getContextObject();
        acc = obj == Boolean.TRUE ? null : (Activation) obj;
        currentTuple = leftTupleIter.next();
        while (currentTuple == null && (node = (TerminalNode) nodeIter.next()) != null) {
            if (!(node instanceof RuleTerminalNode)) {
                continue;
            }
            leftTupleIter = LeftTupleIterator.iterator(wm, node);
            this.currentTuple = leftTupleIter.next();
        }
    }
    return acc;
}

Example 57 with RuleTerminalNode

use of org.drools.core.reteoo.RuleTerminalNode in project drools by kiegroup.

the class LambdaConsequence method evaluate.

@Override
public void evaluate(KnowledgeHelper knowledgeHelper, WorkingMemory workingMemory) throws Exception {
    Tuple tuple = knowledgeHelper.getTuple();
    Declaration[] declarations = ((RuleTerminalNode) knowledgeHelper.getMatch().getTuple().getTupleSink()).getRequiredDeclarations();
    Variable[] vars = consequence.getVariables();
    Object[] facts;
    int factsOffset = 0;
    if (consequence.isUsingDrools()) {
        factsOffset++;
        facts = new Object[vars.length + 1];
        facts[0] = new DroolsImpl(knowledgeHelper, workingMemory);
    } else {
        facts = new Object[vars.length];
    }
    int declrCounter = 0;
    for (Variable var : vars) {
        if (var.isFact()) {
            Declaration declaration = declarations[declrCounter++];
            InternalFactHandle fh = tuple.get(declaration);
            if (consequence.isUsingDrools()) {
                ((DroolsImpl) facts[0]).registerFactHandle(fh);
            }
            facts[factsOffset++] = declaration.getValue((InternalWorkingMemory) workingMemory, fh.getObject());
        } else {
            facts[factsOffset++] = workingMemory.getGlobal(var.getName());
        }
    }
    consequence.getBlock().execute(facts);
    Object[] objs = knowledgeHelper.getTuple().toObjects();
    for (org.drools.model.Consequence.Update update : consequence.getUpdates()) {
        Object updatedFact = context.getBoundFact(update.getUpdatedVariable(), objs);
        // TODO the Update specs has the changed fields so use update(FactHandle newObject, long mask, Class<?> modifiedClass) instead
        knowledgeHelper.update(updatedFact);
    }
    for (FunctionN insert : consequence.getInserts()) {
        Object insertedFact = insert.apply(facts);
        knowledgeHelper.insert(insertedFact);
    }
    for (Variable delete : consequence.getDeletes()) {
        Object deletedFact = context.getBoundFact(delete, objs);
        knowledgeHelper.delete(deletedFact);
    }
}

Example 58 with RuleTerminalNode

use of org.drools.core.reteoo.RuleTerminalNode in project drools by kiegroup.

the class MVELConsequence method evaluate.

@Override
public void evaluate(KnowledgeHelper knowledgeHelper, WorkingMemory workingMemory) throws Exception {
    // same as lambda consequence...
    Tuple tuple = knowledgeHelper.getTuple();
    Declaration[] declarations = ((RuleTerminalNode) knowledgeHelper.getMatch().getTuple().getTupleSink()).getRequiredDeclarations();
    Variable[] vars = consequence.getVariables();
    // ...but the facts are association of Variable and its value, preserving order.
    Map<Variable, Object> facts = new LinkedHashMap<>();
    int declrCounter = 0;
    for (Variable var : vars) {
        if (var.isFact()) {
            Declaration declaration = declarations[declrCounter++];
            InternalFactHandle fh = tuple.get(declaration);
            facts.put(var, declaration.getValue((InternalWorkingMemory) workingMemory, fh.getObject()));
        } else {
            facts.put(var, workingMemory.getGlobal(var.getName()));
        }
    }
    ScriptBlock scriptBlock = null;
    try {
        scriptBlock = (ScriptBlock) consequence.getBlock();
    } catch (ClassCastException e) {
        throw new RuntimeException("I tried to access a ScriptBlock but it was not. So something is thinking is a MVEL consequence but did not set the MVEL script textual representation", e);
    }
    String originalRHS = scriptBlock.getScript();
    String name = context.getRule().getPackageName() + "." + context.getRule().getName();
    String expression = MVELConsequenceBuilder.processMacros(originalRHS);
    String[] globalIdentifiers = new String[] {};
    String[] default_inputIdentifiers = new String[] { "this", "drools", "kcontext", "rule" };
    String[] inputIdentifiers = Stream.concat(Arrays.asList(default_inputIdentifiers).stream(), facts.entrySet().stream().map(kv -> kv.getKey().getName())).collect(Collectors.toList()).toArray(new String[] {});
    String[] default_inputTypes = new String[] { "org.drools.core.spi.KnowledgeHelper", "org.drools.core.spi.KnowledgeHelper", "org.drools.core.spi.KnowledgeHelper", "org.kie.api.definition.rule.Rule" };
    String[] inputTypes = Stream.concat(Arrays.asList(default_inputTypes).stream(), facts.entrySet().stream().map(kv -> kv.getKey().getType().getName())).collect(Collectors.toList()).toArray(new String[] {});
    // ^^ please notice about inputTypes, it is to use the Class.getName(), because is later used by the Classloader internally in MVEL to load the class,
    // do NOT replace with getCanonicalName() otherwise inner classes will not be loaded correctly.
    int languageLevel = 4;
    boolean strictMode = true;
    boolean readLocalsFromTuple = false;
    EvaluatorWrapper[] operators = new EvaluatorWrapper[] {};
    Declaration[] previousDeclarations = new Declaration[] {};
    Declaration[] localDeclarations = new Declaration[] {};
    String[] otherIdentifiers = new String[] {};
    MVELCompilationUnit cu = new MVELCompilationUnit(name, expression, globalIdentifiers, operators, previousDeclarations, localDeclarations, otherIdentifiers, inputIdentifiers, inputTypes, languageLevel, strictMode, readLocalsFromTuple);
    // TODO unfortunately the MVELDialectRuntimeData would be the one of compile time
    // the one from runtime is not helpful, in fact the dialect registry for runtime is empty:
    // MVELDialectRuntimeData runtimeData = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
    MVELDialectRuntimeData runtimeData = new MVELDialectRuntimeData();
    // this classloader will be used by the CompilationUnit to load the imports.
    runtimeData.onAdd(null, Thread.currentThread().getContextClassLoader());
    runtimeData.addPackageImport(context.getPkg().getName());
    runtimeData.addPackageImport("java.lang");
    // therefore we assume for the ScriptBlock all available KBPackages are the default available and imported for the scope of the Script itself.
    for (KiePackage kp : context.getKnowledgePackages()) {
        if (!kp.getName().equals(context.getPkg().getName())) {
            runtimeData.addPackageImport(kp.getName());
        }
    }
    // sometimes here it was passed as a 2nd argument a String?? similar to `rule R in file file.drl`
    Serializable cuResult = cu.getCompiledExpression(runtimeData);
    ExecutableStatement compiledExpression = (ExecutableStatement) cuResult;
    // TODO the part above up to the ExecutableStatement compiledExpression should be cached.
    Map<String, Object> mvelContext = new HashMap<>();
    mvelContext.put("this", knowledgeHelper);
    mvelContext.put("drools", knowledgeHelper);
    mvelContext.put("kcontext", knowledgeHelper);
    mvelContext.put("rule", knowledgeHelper.getRule());
    for (Entry<Variable, Object> kv : facts.entrySet()) {
        mvelContext.put(kv.getKey().getName(), kv.getValue());
    }
    CachingMapVariableResolverFactory cachingFactory = new CachingMapVariableResolverFactory(mvelContext);
    VariableResolverFactory factory = cu.getFactory(knowledgeHelper, ((AgendaItem) knowledgeHelper.getMatch()).getTerminalNode().getRequiredDeclarations(), knowledgeHelper.getRule(), knowledgeHelper.getTuple(), null, (InternalWorkingMemory) workingMemory, workingMemory.getGlobalResolver());
    cachingFactory.setNextFactory(factory);
    MVEL.executeExpression(compiledExpression, knowledgeHelper, cachingFactory);
}

Example 59 with RuleTerminalNode

use of org.drools.core.reteoo.RuleTerminalNode in project drools by kiegroup.

the class RuleTest method testTimeMachine.

@Test
public void testTimeMachine() {
    SessionConfiguration conf = SessionConfiguration.newInstance();
    conf.setClockType(ClockType.PSEUDO_CLOCK);
    WorkingMemory wm = (WorkingMemory) new KnowledgeBaseImpl("x", null).newKieSession(conf, null);
    final Calendar future = Calendar.getInstance();
    ((PseudoClockScheduler) wm.getSessionClock()).setStartupTime(future.getTimeInMillis());
    final RuleImpl rule = new RuleImpl("myrule");
    rule.setEnabled(EnabledBoolean.ENABLED_TRUE);
    assertTrue(rule.isEffective(null, new RuleTerminalNode(), wm));
    future.setTimeInMillis(future.getTimeInMillis() + 100000000);
    rule.setDateEffective(future);
    assertFalse(rule.isEffective(null, new RuleTerminalNode(), wm));
    ((PseudoClockScheduler) wm.getSessionClock()).advanceTime(1000000000000L, TimeUnit.MILLISECONDS);
    assertTrue(rule.isEffective(null, new RuleTerminalNode(), wm));
}

Example 60 with RuleTerminalNode

use of org.drools.core.reteoo.RuleTerminalNode in project drools by kiegroup.

the class RuleTest method testDateExpires.

@Test
public void testDateExpires() throws Exception {
    WorkingMemory wm = (WorkingMemory) new KnowledgeBaseImpl("x", null).newKieSession();
    final RuleImpl rule = new RuleImpl("myrule");
    assertTrue(rule.isEffective(null, new RuleTerminalNode(), wm));
    final Calendar earlier = Calendar.getInstance();
    earlier.setTimeInMillis(10);
    rule.setDateExpires(earlier);
    assertFalse(rule.isEffective(null, new RuleTerminalNode(), wm));
    final Calendar later = Calendar.getInstance();
    later.setTimeInMillis(later.getTimeInMillis() + 100000000);
    rule.setDateExpires(later);
    assertTrue(rule.isEffective(null, new RuleTerminalNode(), wm));
}