Examples with OperatorDescr org.drools.compiler.lang.descr.OperatorDescr used on opensource projects

Example 1 with OperatorDescr

use of org.drools.compiler.lang.descr.OperatorDescr in project drools by kiegroup.

the class PatternBuilder method buildCcdDescr.

protected Constraint buildCcdDescr(RuleBuildContext context, PatternDescr patternDescr, Pattern pattern, BaseDescr d, ConstraintConnectiveDescr ccd, MVELDumper.MVELDumperContext mvelCtx) {
    d.copyLocation(patternDescr);
    mvelCtx.clear();
    String expr = context.getCompilerFactory().getExpressionProcessor().dump(d, ccd, mvelCtx);
    Map<String, OperatorDescr> aliases = mvelCtx.getAliases();
    // create bindings
    TypeDeclaration typeDeclaration = getTypeDeclaration(pattern, context);
    for (BindingDescr bind : mvelCtx.getBindings()) {
        buildRuleBindings(context, patternDescr, pattern, bind, typeDeclaration);
    }
    if (expr.length() == 0) {
        return null;
    }
    // check if it is an atomic expression
    Constraint constraint = processAtomicExpression(context, pattern, d, expr, aliases);
    // otherwise check if it is a simple expression
    return constraint != null ? constraint : buildExpression(context, pattern, d, expr, aliases);
}

Example 2 with OperatorDescr

use of org.drools.compiler.lang.descr.OperatorDescr in project drools by kiegroup.

the class PatternBuilder method buildOperators.

protected static Map<String, EvaluatorWrapper> buildOperators(RuleBuildContext context, Pattern pattern, BaseDescr predicateDescr, Map<String, OperatorDescr> aliases) {
    if (aliases.isEmpty()) {
        return Collections.emptyMap();
    }
    Map<String, EvaluatorWrapper> operators = new HashMap<String, EvaluatorWrapper>();
    for (Map.Entry<String, OperatorDescr> entry : aliases.entrySet()) {
        OperatorDescr op = entry.getValue();
        Declaration leftDecl = createDeclarationForOperator(context, pattern, op.getLeftString());
        Declaration rightDecl = createDeclarationForOperator(context, pattern, op.getRightString());
        Target left = leftDecl != null && leftDecl.isPatternDeclaration() ? Target.HANDLE : Target.FACT;
        Target right = rightDecl != null && rightDecl.isPatternDeclaration() ? Target.HANDLE : Target.FACT;
        op.setLeftIsHandle(left == Target.HANDLE);
        op.setRightIsHandle(right == Target.HANDLE);
        Evaluator evaluator = getConstraintBuilder(context).getEvaluator(context, predicateDescr, ValueType.OBJECT_TYPE, op.getOperator(), // the rewrite takes care of negation
        false, op.getParametersText(), left, right);
        EvaluatorWrapper wrapper = getConstraintBuilder(context).wrapEvaluator(evaluator, leftDecl, rightDecl);
        operators.put(entry.getKey(), wrapper);
    }
    return operators;
}