Examples with SingleConstraint org.drools.model.SingleConstraint used on opensource projects

Example 1 with SingleConstraint

use of org.drools.model.SingleConstraint in project drools by kiegroup.

the class BruteForceEngine method match.

private boolean match(Constraint constraint, TupleHandle tuple) {
    switch(constraint.getType()) {
        case SINGLE:
            SingleConstraint singleCon = (SingleConstraint) constraint;
            Variable[] vars = singleCon.getVariables();
            switch(vars.length) {
                case 0:
                    try {
                        return singleCon.getPredicate().test();
                    } catch (Exception e) {
                        throw new RuntimeException(e);
                    }
                case 1:
                    Object obj = tuple.get(vars[0]);
                    try {
                        return singleCon.getPredicate().test(obj);
                    } catch (Exception e) {
                        throw new RuntimeException(e);
                    }
                case 2:
                    Object obj1 = tuple.get(vars[0]);
                    Object obj2 = tuple.get(vars[1]);
                    try {
                        return singleCon.getPredicate().test(obj1, obj2);
                    } catch (Exception e) {
                        throw new RuntimeException(e);
                    }
            }
        case AND:
            AndConstraints andCon = (AndConstraints) constraint;
            return andCon.getChildren().stream().allMatch(con -> match(con, tuple));
        case OR:
            OrConstraints orCon = (OrConstraints) constraint;
            return orCon.getChildren().stream().anyMatch(con -> match(con, tuple));
    }
    return false;
}

Example 2 with SingleConstraint

use of org.drools.model.SingleConstraint in project drools by kiegroup.

the class KiePackagesBuilder method addConstraintsToPattern.

private void addConstraintsToPattern(RuleContext ctx, Pattern pattern, org.drools.model.Pattern modelPattern, Constraint constraint) {
    if (constraint.getType() == Constraint.Type.SINGLE) {
        SingleConstraint singleConstraint = (SingleConstraint) constraint;
        boolean isEqual = singleConstraint.getIndex() != null && singleConstraint.getIndex().getConstraintType() == Index.ConstraintType.EQUAL;
        if (singleConstraint.getVariables().length > 0) {
            Variable[] vars = singleConstraint.getVariables();
            Declaration[] declarations = new Declaration[vars.length];
            Declaration unificationDeclaration = null;
            for (int i = 0; i < vars.length; i++) {
                declarations[i] = ctx.getDeclaration(vars[i]);
                if (isEqual && declarations[i].getPattern().getObjectType().equals(ClassObjectType.DroolsQuery_ObjectType)) {
                    unificationDeclaration = declarations[i];
                } else if (pattern.getSource() instanceof MultiAccumulate) {
                    Declaration accDeclaration = pattern.getDeclarations().get(declarations[i].getBindingName());
                    if (accDeclaration != null) {
                        declarations[i].setReadAccessor(accDeclaration.getExtractor());
                    }
                }
            }
            ConstraintEvaluator constraintEvaluator = singleConstraint.isTemporal() ? new TemporalConstraintEvaluator(declarations, pattern, singleConstraint) : new ConstraintEvaluator(declarations, pattern, singleConstraint);
            org.drools.core.spi.Constraint droolsConstraint = unificationDeclaration != null ? new UnificationConstraint(unificationDeclaration, constraintEvaluator) : new LambdaConstraint(constraintEvaluator);
            pattern.addConstraint(droolsConstraint);
        }
    } else if (modelPattern.getConstraint().getType() == Constraint.Type.AND) {
        for (Constraint child : constraint.getChildren()) {
            addConstraintsToPattern(ctx, pattern, modelPattern, child);
        }
    }
}

Example 3 with SingleConstraint

use of org.drools.model.SingleConstraint in project drools by kiegroup.

the class KiePackagesBuilder method createWindowReference.

private <T> void createWindowReference(RuleContext ctx, WindowReference<T> window) {
    WindowDeclaration windowDeclaration = new WindowDeclaration(window.getName(), ctx.getPkg().getName());
    Variable<T> variable = declarationOf(window.getPatternType());
    Pattern windowPattern = new Pattern(0, getClassObjectType(window.getPatternType()), variable.getName());
    windowDeclaration.setPattern(windowPattern);
    for (Predicate1<T> predicate : window.getPredicates()) {
        SingleConstraint singleConstraint = new SingleConstraint1<>(generateName("expr"), variable, predicate);
        ConstraintEvaluator constraintEvaluator = new ConstraintEvaluator(windowPattern, singleConstraint);
        windowPattern.addConstraint(new LambdaConstraint(constraintEvaluator));
    }
    windowPattern.addBehavior(createWindow(window));
    ctx.getPkg().addWindowDeclaration(windowDeclaration);
}