Examples with DescrBuildError org.drools.compiler.compiler.DescrBuildError used on opensource projects

Example 6 with DescrBuildError

use of org.drools.compiler.compiler.DescrBuildError in project drools by kiegroup.

the class DialectUtil method rewriteModifyDescr.

private static void rewriteModifyDescr(RuleBuildContext context, JavaBlockDescr d, String originalBlock, StringBuilder consequence, Declaration declr, String obj) {
    List<String> settableProperties = null;
    Class<?> typeClass = findModifiedClass(context, d, declr);
    TypeDeclaration typeDeclaration = typeClass == null ? null : context.getKnowledgeBuilder().getTypeDeclaration(typeClass);
    boolean isPropertyReactive = typeDeclaration != null && typeDeclaration.isPropertyReactive();
    if (isPropertyReactive) {
        typeDeclaration.setTypeClass(typeClass);
        settableProperties = typeDeclaration.getAccessibleProperties();
    }
    ConsequenceMetaData.Statement statement = null;
    if (typeDeclaration != null) {
        statement = new ConsequenceMetaData.Statement(ConsequenceMetaData.Statement.Type.MODIFY, typeClass);
        context.getRule().getConsequenceMetaData().addStatement(statement);
    }
    BitMask modificationMask = isPropertyReactive ? getEmptyPropertyReactiveMask(settableProperties.size()) : allSetButTraitBitMask();
    int end = originalBlock.indexOf("{");
    if (end == -1) {
        // no block
        context.addError(new DescrBuildError(context.getParentDescr(), context.getRuleDescr(), null, "Block missing after modify" + d.getTargetExpression() + " ?\n"));
        return;
    }
    addLineBreaks(consequence, originalBlock.substring(0, end));
    int start = end + 1;
    // adding each of the expressions:
    for (String exprStr : ((JavaModifyBlockDescr) d).getExpressions()) {
        end = originalBlock.indexOf(exprStr, start);
        addLineBreaks(consequence, originalBlock.substring(start, end));
        consequence.append(obj).append(".");
        consequence.append(exprStr);
        consequence.append("; ");
        start = end + exprStr.length();
        if (typeDeclaration != null) {
            modificationMask = parseModifiedProperties(statement, settableProperties, typeDeclaration, isPropertyReactive, modificationMask, exprStr);
        }
    }
    addLineBreaks(consequence, originalBlock.substring(end));
    appendUpdateStatement(consequence, declr, obj, modificationMask, typeClass);
}

Example 7 with DescrBuildError

use of org.drools.compiler.compiler.DescrBuildError in project drools by kiegroup.

the class MVELAccumulateBuilder method buildExternalFunctions.

private Accumulator[] buildExternalFunctions(final RuleBuildContext context, final AccumulateDescr accumDescr, MVELDialect dialect, Map<String, Declaration> decls, Map<String, Declaration> sourceOuterDeclr, BoundIdentifiers boundIds, boolean readLocalsFromTuple) {
    Accumulator[] accumulators;
    List<AccumulateFunctionCallDescr> functions = accumDescr.getFunctions();
    accumulators = new Accumulator[functions.size()];
    // creating the custom array reader
    InternalReadAccessor arrayReader = new SelfReferenceClassFieldReader(Object[].class);
    int index = 0;
    Pattern pattern = (Pattern) context.getDeclarationResolver().peekBuildStack();
    for (AccumulateFunctionCallDescr func : functions) {
        // build an external function executor
        AccumulateFunction function = context.getConfiguration().getAccumulateFunction(func.getFunction());
        if (function == null) {
            // might have been imported in the package
            function = context.getPkg().getAccumulateFunctions().get(func.getFunction());
        }
        if (function == null) {
            context.addError(new DescrBuildError(accumDescr, context.getRuleDescr(), null, "Unknown accumulate function: '" + func.getFunction() + "' on rule '" + context.getRuleDescr().getName() + "'. All accumulate functions must be registered before building a resource."));
            return null;
        }
        final AnalysisResult analysis = dialect.analyzeExpression(context, accumDescr, func.getParams().length > 0 ? func.getParams()[0] : "\"\"", boundIds);
        MVELCompilationUnit unit = dialect.getMVELCompilationUnit(func.getParams().length > 0 ? func.getParams()[0] : "\"\"", analysis, getUsedDeclarations(decls, analysis), getUsedDeclarations(sourceOuterDeclr, analysis), null, context, "drools", KnowledgeHelper.class, readLocalsFromTuple, MVELCompilationUnit.Scope.CONSTRAINT);
        accumulators[index] = new MVELAccumulatorFunctionExecutor(unit, function);
        // if there is a binding, create the binding
        if (func.getBind() != null) {
            if (context.getDeclarationResolver().isDuplicated(context.getRule(), func.getBind(), function.getResultType().getName())) {
                if (!func.isUnification()) {
                    context.addError(new DescrBuildError(context.getParentDescr(), accumDescr, null, "Duplicate declaration for variable '" + func.getBind() + "' in the rule '" + context.getRule().getName() + "'"));
                } else {
                    Declaration inner = context.getDeclarationResolver().getDeclaration(func.getBind());
                    Constraint c = new MvelConstraint(Collections.singletonList(context.getPkg().getName()), accumDescr.isMultiFunction() ? "this[ " + index + " ] == " + func.getBind() : "this == " + func.getBind(), new Declaration[] { inner }, null, null, IndexUtil.ConstraintType.EQUAL, context.getDeclarationResolver().getDeclaration(func.getBind()), accumDescr.isMultiFunction() ? new ArrayElementReader(arrayReader, index, function.getResultType()) : new SelfReferenceClassFieldReader(function.getResultType()), true);
                    ((MutableTypeConstraint) c).setType(Constraint.ConstraintType.BETA);
                    pattern.addConstraint(c);
                    index++;
                }
            } else {
                Declaration declr = pattern.addDeclaration(func.getBind());
                if (accumDescr.isMultiFunction()) {
                    declr.setReadAccessor(new ArrayElementReader(arrayReader, index, function.getResultType()));
                } else {
                    declr.setReadAccessor(new SelfReferenceClassFieldReader(function.getResultType()));
                }
            }
        }
        index++;
    }
    return accumulators;
}

Example 8 with DescrBuildError

use of org.drools.compiler.compiler.DescrBuildError in project drools by kiegroup.

the class MVELConsequenceBuilder method build.

public void build(final RuleBuildContext context, String consequenceName) {
    // pushing consequence LHS into the stack for variable resolution
    context.getDeclarationResolver().pushOnBuildStack(context.getRule().getLhs());
    try {
        MVELDialect dialect = (MVELDialect) context.getDialect("mvel");
        final RuleDescr ruleDescr = context.getRuleDescr();
        String text = (RuleImpl.DEFAULT_CONSEQUENCE_NAME.equals(consequenceName)) ? (String) ruleDescr.getConsequence() : (String) ruleDescr.getNamedConsequences().get(consequenceName);
        text = processMacros(text);
        Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
        AnalysisResult analysis = dialect.analyzeBlock(context, text, new BoundIdentifiers(DeclarationScopeResolver.getDeclarationClasses(decls), context, Collections.EMPTY_MAP, KnowledgeHelper.class), null, "drools", KnowledgeHelper.class);
        if (analysis == null) {
            // something bad happened, issue already logged in errors
            return;
        }
        final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
        final Declaration[] declarations = new Declaration[usedIdentifiers.getDeclrClasses().size()];
        String[] declrStr = new String[declarations.length];
        int j = 0;
        for (String str : usedIdentifiers.getDeclrClasses().keySet()) {
            declrStr[j] = str;
            declarations[j++] = decls.get(str);
        }
        Arrays.sort(declarations, SortDeclarations.instance);
        for (int i = 0; i < declrStr.length; i++) {
            declrStr[i] = declarations[i].getIdentifier();
        }
        context.getRule().setRequiredDeclarationsForConsequence(consequenceName, declrStr);
        MVELCompilationUnit unit = dialect.getMVELCompilationUnit(text, analysis, declarations, null, null, context, "drools", KnowledgeHelper.class, false, MVELCompilationUnit.Scope.CONSEQUENCE);
        MVELConsequence expr = new MVELConsequence(unit, dialect.getId(), consequenceName);
        if (RuleImpl.DEFAULT_CONSEQUENCE_NAME.equals(consequenceName)) {
            context.getRule().setConsequence(expr);
        } else {
            context.getRule().addNamedConsequence(consequenceName, expr);
        }
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
        data.addCompileable(context.getRule(), expr);
        expr.compile(data, context.getRule());
    } catch (final Exception e) {
        copyErrorLocation(e, context.getRuleDescr());
        context.addError(new DescrBuildError(context.getParentDescr(), context.getRuleDescr(), null, "Unable to build expression for 'consequence': " + e.getMessage() + " '" + context.getRuleDescr().getConsequence() + "'"));
    }
}

Example 9 with DescrBuildError

use of org.drools.compiler.compiler.DescrBuildError in project drools by kiegroup.

the class JavaAccumulateBuilder method getAccumulateFunction.

private AccumulateFunction getAccumulateFunction(RuleBuildContext context, AccumulateDescr accumDescr, AccumulateFunctionCallDescr fc, RuleConditionElement source, Map<String, Class<?>> declCls) {
    String functionName = AccumulateUtil.getFunctionName(() -> MVELExprAnalyzer.getExpressionType(context, declCls, source, fc.getParams()[0]), fc.getFunction());
    // find the corresponding function
    AccumulateFunction function = context.getConfiguration().getAccumulateFunction(functionName);
    if (function == null) {
        // might have been imported in the package
        function = context.getPkg().getAccumulateFunctions().get(functionName);
    }
    if (function == null) {
        context.addError(new DescrBuildError(accumDescr, context.getRuleDescr(), null, "Unknown accumulate function: '" + functionName + "' on rule '" + context.getRuleDescr().getName() + "'. All accumulate functions must be registered before building a resource."));
    }
    return function;
}

Example 10 with DescrBuildError

use of org.drools.compiler.compiler.DescrBuildError in project drools by kiegroup.

the class MVELDialect method analyzeExpression.

public AnalysisResult analyzeExpression(final PackageBuildContext context, final BaseDescr descr, final Object content, final BoundIdentifiers availableIdentifiers, final Map<String, Class<?>> localTypes) {
    AnalysisResult result = null;
    // the following is required for proper error handling
    BaseDescr temp = context.getParentDescr();
    context.setParentDescr(descr);
    try {
        result = MVELExprAnalyzer.analyzeExpression(context, (String) content, availableIdentifiers, localTypes, "drools", KnowledgeHelper.class);
    } catch (final Exception e) {
        DialectUtil.copyErrorLocation(e, descr);
        context.addError(new DescrBuildError(context.getParentDescr(), descr, null, "Unable to determine the used declarations.\n" + e.getMessage()));
    } finally {
        // setting it back to original parent descr
        context.setParentDescr(temp);
    }
    return result;
}