Examples with DroolsParserException org.drools.drl.parser.DroolsParserException used on opensource projects

Example 11 with DroolsParserException

use of org.drools.drl.parser.DroolsParserException in project drools by kiegroup.

the class QueryElementBuilder method processBinding.

private void processBinding(RuleBuildContext context, BaseDescr descr, Declaration[] params, QueryArgument[] arguments, List<Declaration> requiredDeclarations, InternalReadAccessor arrayReader, Pattern pattern, BindingDescr bind) {
    Declaration declr = context.getDeclarationResolver().getDeclaration(bind.getVariable());
    if (declr != null) {
        // check right maps to a slot, otherwise we can't reverse this and should error
        int pos = getPos(bind.getExpression(), params);
        if (pos >= 0) {
            // slot exist, reverse and continue
            String slot = bind.getExpression();
            String var = bind.getVariable();
            bind.setVariable(slot);
            bind.setExpression(var);
        } else {
        // else error, we cannot find the slot to unify against
        }
    }
    // left does not already exist, is it a slot?
    int pos = getPos(bind.getVariable(), params);
    if (pos >= 0) {
        // it's an input on a slot, is the input using bindings?
        declr = context.getDeclarationResolver().getDeclaration(bind.getExpression());
        if (declr != null) {
            requiredDeclarations.add(declr);
            arguments[pos] = new QueryArgument.Declr(declr);
        } else {
            // it must be a literal/expression
            // it's an expression and thus an input
            DrlExprParser parser = new DrlExprParser(context.getConfiguration().getLanguageLevel());
            ConstraintConnectiveDescr bresult = parser.parse(bind.getExpression());
            if (parser.hasErrors()) {
                for (DroolsParserException error : parser.getErrors()) {
                    context.addError(new DescrBuildError(context.getParentDescr(), descr, null, "Unable to parser pattern expression:\n" + error.getMessage()));
                }
                return;
            }
            arguments[pos] = getLiteralQueryArgument(context, descr, bresult);
        }
    } else {
        // this is creating a new output binding
        // we know it doesn't exist, as we already checked for left == var
        pos = getPos(bind.getExpression(), params);
        if (pos < 0) {
            // error this must be a binding on a slot
            context.addError(new DescrBuildError(context.getParentDescr(), descr, null, "named argument does not exist:\n" + bind.getExpression()));
            return;
        }
        arguments[pos] = getVariableQueryArgument(arrayReader, params, pos, pattern, bind.getVariable());
    }
}

Example 12 with DroolsParserException

use of org.drools.drl.parser.DroolsParserException in project drools by kiegroup.

the class PatternBuilder method parseExpression.

protected ConstraintConnectiveDescr parseExpression(final RuleBuildContext context, final PatternDescr patternDescr, final BaseDescr original, final String expression) {
    DrlExprParser parser = new DrlExprParser(context.getConfiguration().getLanguageLevel());
    ConstraintConnectiveDescr result = parser.parse(expression);
    result.setResource(patternDescr.getResource());
    result.copyLocation(original);
    if (parser.hasErrors()) {
        for (DroolsParserException error : parser.getErrors()) {
            registerDescrBuildError(context, patternDescr, "Unable to parse pattern expression:\n" + error.getMessage());
        }
        return null;
    }
    return result;
}