Examples with PatternExprImpl org.drools.model.PatternDSL.PatternExprImpl used on opensource projects

Example 1 with PatternExprImpl

use of org.drools.model.PatternDSL.PatternExprImpl in project drools by kiegroup.

the class ViewPatternBuilder method ruleItem2Condition.

private static Condition ruleItem2Condition(RuleItem ruleItem) {
    if (ruleItem instanceof PatternDefImpl) {
        PatternDefImpl<?> patternDef = (PatternDefImpl) ruleItem;
        PatternImpl pattern = new PatternImpl(patternDef.getFirstVariable());
        for (PatternItem patternItem : patternDef.getItems()) {
            if (patternItem instanceof PatternExprImpl) {
                pattern.addConstraint(((PatternExprImpl) patternItem).asConstraint(patternDef));
            } else if (patternItem instanceof PatternBindingImpl) {
                pattern.addBinding(((PatternBindingImpl) patternItem).asBinding(patternDef));
            }
        }
        pattern.addWatchedProps(patternDef.getWatch());
        return pattern;
    }
    if (ruleItem instanceof FixedValueItem) {
        return new EvalImpl(((FixedValueItem) ruleItem).isValue());
    }
    if (ruleItem instanceof QueryCallViewItem) {
        return new QueryCallPattern((QueryCallViewItem) ruleItem);
    }
    if (ruleItem instanceof CombinedExprViewItem) {
        CombinedExprViewItem combined = (CombinedExprViewItem) ruleItem;
        List<Condition> conditions = new ArrayList<>();
        for (ViewItem expr : combined.getExpressions()) {
            conditions.add(ruleItem2Condition(expr));
        }
        return new CompositePatterns(combined.getType(), conditions);
    }
    if (ruleItem instanceof ExistentialExprViewItem) {
        ExistentialExprViewItem existential = (ExistentialExprViewItem) ruleItem;
        return new ExistentialPatternImpl(ruleItem2Condition(existential.getExpression()), existential.getType());
    }
    if (ruleItem instanceof AccumulateExprViewItem) {
        AccumulateExprViewItem acc = (AccumulateExprViewItem) ruleItem;
        return new AccumulatePatternImpl(ruleItem2Condition(acc.getExpr()), acc.getAccumulateFunctions());
    }
    if (ruleItem instanceof ExprViewItem) {
        return new EvalImpl(createConstraint((ExprViewItem) ruleItem));
    }
    throw new UnsupportedOperationException("Unknown " + ruleItem);
}