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

Example 1 with Binding

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

the class ViewFlowBuilder method viewItems2Condition.

private static CompositePatterns viewItems2Condition(BuildContext ctx, Condition.Type type, boolean topLevel) {
    List<Condition> conditions = new ArrayList<>();
    Map<Variable<?>, Condition> conditionMap = new HashMap<>();
    Map<String, Consequence> consequences = topLevel ? new LinkedHashMap<>() : null;
    Iterator<RuleItem> ruleItemIterator = ctx.ruleItems.iterator();
    while (ruleItemIterator.hasNext()) {
        Map<Variable<?>, InputViewItemImpl<?>> scopedInputs = type.createsScope() ? new LinkedHashMap<>(ctx.inputs) : ctx.inputs;
        RuleItem ruleItem = ruleItemIterator.next();
        if (ruleItem instanceof FixedValueItem) {
            conditions.add(new EvalImpl(((FixedValueItem) ruleItem).isValue()));
            continue;
        }
        if (ruleItem instanceof Consequence) {
            if (!topLevel) {
                throw new IllegalStateException("A consequence can be only a top level item");
            }
            Consequence consequence = (Consequence) ruleItem;
            String name = ruleItemIterator.hasNext() ? generateName("consequence") : RuleImpl.DEFAULT_CONSEQUENCE_NAME;
            consequences.put(name, consequence);
            conditions.add(new NamedConsequenceImpl(name, consequence.isBreaking()));
            continue;
        }
        if (ruleItem instanceof ConditionalConsequence) {
            if (!topLevel) {
                throw new IllegalStateException("A consequence can be only a top level item");
            }
            conditions.add(createConditionalNamedConsequence(consequences, (ConditionalConsequence) ruleItem));
            continue;
        }
        ViewItem viewItem = (ViewItem) ruleItem;
        if (viewItem instanceof CombinedExprViewItem) {
            CombinedExprViewItem combined = (CombinedExprViewItem) viewItem;
            conditions.add(viewItems2Condition(new BuildContext(ctx, combined.getExpressions(), scopedInputs), combined.getType(), false));
            continue;
        }
        if (viewItem instanceof QueryCallViewItem) {
            QueryCallViewItem query = ((QueryCallViewItem) viewItem);
            for (Argument arg : query.getArguments()) {
                if (arg instanceof Variable) {
                    ctx.usedVars.add(((Variable) arg));
                }
            }
            conditions.add(new QueryCallPattern(query));
            continue;
        }
        if (viewItem instanceof Binding) {
            Binding bindViewItem = (Binding) viewItem;
            PatternImpl pattern = (PatternImpl) conditionMap.get(bindViewItem.getInputVariable());
            if (pattern == null) {
                // This should probably be the bindViewItem.getBoundVariable() instead of the input
                // as the input variables can be many
                pattern = new PatternImpl(bindViewItem.getInputVariable());
                pattern.addWatchedProps(bindViewItem.getWatchedProps());
                ctx.usedVars.add(bindViewItem.getInputVariable());
                conditions.add(pattern);
                conditionMap.put(bindViewItem.getInputVariable(), pattern);
            }
            pattern.addBinding(bindViewItem);
            ctx.usedVars.add(viewItem.getFirstVariable());
            ctx.addBinding(bindViewItem);
            scopedInputs.putIfAbsent(viewItem.getFirstVariable(), (InputViewItemImpl) input(viewItem.getFirstVariable()));
            continue;
        }
        Variable<?> patterVariable = findPatterVariable(viewItem, scopedInputs.keySet());
        if (viewItem instanceof InputViewItemImpl) {
            scopedInputs.put(patterVariable, (InputViewItemImpl) viewItem);
            PatternImpl condition = new PatternImpl(patterVariable);
            condition.addWatchedProps(((InputViewItemImpl) viewItem).getWatchedProps());
            conditions.add(condition);
            conditionMap.put(patterVariable, condition);
            ctx.usedVars.add(patterVariable);
            continue;
        }
        if (viewItem instanceof ExistentialExprViewItem) {
            ExistentialExprViewItem existential = ((ExistentialExprViewItem) viewItem);
            if (patterVariable != null && !existential.isQueryExpression()) {
                registerInputsFromViewItem(existential.getExpression(), conditionMap, scopedInputs, patterVariable);
            }
            Condition condition = new PatternImpl(patterVariable, SingleConstraint.TRUE, ctx.bindings.get(patterVariable));
            conditions.add(new ExistentialPatternImpl(viewItem2Condition(existential.getExpression(), condition, new BuildContext(ctx, new LinkedHashMap<>())), existential.getType()));
            continue;
        }
        if (ruleItem instanceof ExprViewItem && ctx.boundVars.contains(patterVariable)) {
            conditions.add(new EvalImpl(createConstraint((ExprViewItem) ruleItem)));
            continue;
        }
        ctx.usedVars.add(patterVariable);
        Condition condition;
        if (type == Type.AND) {
            condition = conditionMap.get(patterVariable);
            if (condition == null) {
                condition = new PatternImpl(patterVariable, SingleConstraint.TRUE, ctx.bindings.get(patterVariable));
                conditions.add(condition);
                if (!(viewItem instanceof AccumulateExprViewItem)) {
                    conditionMap.put(patterVariable, condition);
                }
                scopedInputs.putIfAbsent(patterVariable, (InputViewItemImpl) input(patterVariable));
            }
        } else {
            condition = new PatternImpl(patterVariable);
            conditions.add(condition);
        }
        addInputFromVariableSource(scopedInputs, patterVariable);
        registerInputsFromViewItem(viewItem, conditionMap, scopedInputs, null);
        Condition modifiedPattern = viewItem2Condition(viewItem, condition, new BuildContext(ctx, scopedInputs));
        conditions.set(conditions.indexOf(condition), modifiedPattern);
        if (type == Type.AND && !(viewItem instanceof AccumulateExprViewItem)) {
            conditionMap.put(patterVariable, modifiedPattern);
        }
    }
    return new CompositePatterns(type, conditions, ctx.usedVars, consequences);
}

Example 2 with Binding

use of org.drools.model.Binding 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 3 with Binding

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

the class AccumulatePatternImpl method findPatternImplSource.

private Pattern findPatternImplSource() {
    if (condition instanceof Pattern) {
        return (Pattern) condition;
    }
    final Variable source = getAccumulateFunctions()[0].getSource();
    for (Condition subCondition : condition.getSubConditions()) {
        if (subCondition instanceof PatternImpl) {
            PatternImpl patternImpl = (PatternImpl) subCondition;
            boolean isSource = patternImpl.getBindings().stream().anyMatch(b -> (b instanceof Binding) && ((Binding) b).getBoundVariable().equals(source));
            if (isSource) {
                return patternImpl;
            }
        }
    }
    return null;
}