Examples with Declaration org.drools.core.rule.Declaration used on opensource projects

Example 46 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class ConstraintEvaluator method findPatternAndRequiredDeclaration.

private Declaration findPatternAndRequiredDeclaration() {
    Declaration patternDeclaration = null;
    List<Declaration> requiredDeclarationsList = new ArrayList<>();
    for (int i = 0; i < declarations.length; i++) {
        if (pattern.getDeclaration().getIdentifier().equals(declarations[i].getIdentifier())) {
            patternDeclaration = declarations[i];
        } else {
            requiredDeclarationsList.add(declarations[i]);
        }
    }
    this.requiredDeclarations = requiredDeclarationsList.toArray(new Declaration[requiredDeclarationsList.size()]);
    return patternDeclaration;
}

Example 47 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class KiePackagesBuilder method buildEval.

private EvalCondition buildEval(RuleContext ctx, EvalImpl eval) {
    Declaration[] declarations = Stream.of(eval.getExpr().getVariables()).map(ctx::getDeclaration).toArray(Declaration[]::new);
    EvalExpression evalExpr = new LambdaEvalExpression(declarations, eval.getExpr());
    return new EvalCondition(evalExpr, declarations);
}

Example 48 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class KiePackagesBuilder method addQueryPattern.

private void addQueryPattern(Query query, QueryImpl queryImpl, RuleContext ctx) {
    Pattern pattern = new Pattern(ctx.getNextPatternIndex(), // offset is 0 by default
    0, ClassObjectType.DroolsQuery_ObjectType, null);
    InternalReadAccessor extractor = new LambdaReadAccessor(DroolsQuery.class, q -> ((DroolsQuery) q).getName());
    QueryNameConstraint constraint = new QueryNameConstraint(extractor, query.getName());
    pattern.addConstraint(constraint);
    queryImpl.getLhs().addChild(pattern);
    Variable<?>[] args = query.getArguments();
    Declaration[] declarations = new Declaration[args.length];
    for (int i = 0; i < args.length; i++) {
        int index = i;
        LambdaReadAccessor accessor = new LambdaReadAccessor(index, args[index].getType(), obj -> ((DroolsQuery) obj).getElements()[index]);
        declarations[i] = new Declaration(args[i].getName(), accessor, pattern, true);
        pattern.addDeclaration(declarations[i]);
        ctx.addQueryDeclaration(args[i], declarations[i]);
    }
    queryImpl.setParameters(declarations);
}

Example 49 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class KiePackagesBuilder method buildPattern.

private Pattern buildPattern(RuleContext ctx, GroupElement group, Condition condition) {
    org.drools.model.Pattern<?> modelPattern = (org.drools.model.Pattern) condition;
    Pattern pattern = addPatternForVariable(ctx, group, modelPattern.getPatternVariable());
    for (Binding binding : modelPattern.getBindings()) {
        Declaration declaration = new Declaration(binding.getBoundVariable().getName(), new LambdaReadAccessor(binding.getBoundVariable().getType(), binding.getBindingFunction()), pattern, true);
        pattern.addDeclaration(declaration);
        if (binding.getReactOn() != null) {
            addFieldsToPatternWatchlist(pattern, binding.getReactOn());
        }
        ctx.addInnerDeclaration(binding.getBoundVariable(), declaration);
    }
    Declaration queryArgDecl = ctx.getQueryDeclaration(modelPattern.getPatternVariable());
    if (queryArgDecl != null) {
        pattern.addConstraint(new UnificationConstraint(queryArgDecl));
    }
    addConstraintsToPattern(ctx, pattern, modelPattern, modelPattern.getConstraint());
    addFieldsToPatternWatchlist(pattern, modelPattern.getWatchedProps());
    return pattern;
}

Example 50 with Declaration

use of org.drools.core.rule.Declaration in project drools by kiegroup.

the class KiePackagesBuilder method buildAccumulate.

private Accumulate buildAccumulate(RuleContext ctx, AccumulatePattern accPattern, RuleConditionElement source, Pattern pattern, List<String> usedVariableName, Binding binding) {
    AccumulateFunction[] accFunctions = accPattern.getAccumulateFunctions();
    Accumulate accumulate;
    if (accFunctions.length == 1) {
        final Class<?> functionClass = accFunctions[0].getFunctionClass();
        final Accumulator accumulator = createAccumulator(usedVariableName, binding, functionClass);
        final Variable boundVar = accPattern.getBoundVariables()[0];
        final Declaration declaration = new Declaration(boundVar.getName(), getReadAcessor(JAVA_CLASS_OBJECT_TYPE), pattern, true);
        pattern.addDeclaration(declaration);
        Declaration[] bindingDeclaration = binding != null ? new Declaration[0] : new Declaration[] { ctx.getPattern(accFunctions[0].getSource()).getDeclaration() };
        accumulate = new SingleAccumulate(source, bindingDeclaration, accumulator);
    } else {
        InternalReadAccessor reader = new SelfReferenceClassFieldReader(Object[].class);
        Accumulator[] accumulators = new Accumulator[accFunctions.length];
        for (int i = 0; i < accFunctions.length; i++) {
            final Class<?> functionClass = accFunctions[i].getFunctionClass();
            final Accumulator accumulator = createAccumulator(usedVariableName, binding, functionClass);
            Variable boundVar = accPattern.getBoundVariables()[i];
            pattern.addDeclaration(new Declaration(boundVar.getName(), new ArrayElementReader(reader, i, boundVar.getType()), pattern, true));
            accumulators[i] = accumulator;
        }
        accumulate = new MultiAccumulate(source, new Declaration[0], accumulators);
    }
    for (Variable boundVar : accPattern.getBoundVariables()) {
        ctx.addAccumulateSource(boundVar, accumulate);
    }
    return accumulate;
}