Examples with MVELDialectRuntimeData org.drools.core.rule.MVELDialectRuntimeData used on opensource projects

Example 16 with MVELDialectRuntimeData

use of org.drools.core.rule.MVELDialectRuntimeData in project jbpm by kiegroup.

the class MVELActionBuilder method buildAction.

protected void buildAction(final PackageBuildContext context, final DroolsAction action, final ActionDescr actionDescr, final ContextResolver contextResolver, final MVELDialect dialect, final MVELAnalysisResult analysis, final String text, Map<String, Class<?>> variables) throws Exception {
    Set<String> variableNames = analysis.getNotBoundedIdentifiers();
    if (contextResolver != null) {
        for (String variableName : variableNames) {
            if (analysis.getMvelVariables().keySet().contains(variableName) || variableName.equals("kcontext") || variableName.equals("context")) {
                continue;
            }
            VariableScope variableScope = (VariableScope) contextResolver.resolveContext(VariableScope.VARIABLE_SCOPE, variableName);
            if (variableScope == null) {
                context.getErrors().add(new DescrBuildError(context.getParentDescr(), actionDescr, null, "Could not find variable '" + variableName + "' " + "for action '" + actionDescr.getText() + "'"));
            } else {
                variables.put(variableName, context.getDialect().getTypeResolver().resolveType(variableScope.findVariable(variableName).getType().getStringType()));
            }
        }
    }
    MVELCompilationUnit unit = dialect.getMVELCompilationUnit(text, analysis, null, null, variables, context, "context", org.kie.api.runtime.process.ProcessContext.class, false, MVELCompilationUnit.Scope.EXPRESSION);
    MVELAction expr = new MVELAction(unit, context.getDialect().getId());
    action.setMetaData("Action", expr);
    MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData(dialect.getId());
    data.addCompileable(action, expr);
    expr.compile(data);
    collectTypes("MVELDialect", analysis, (ProcessBuildContext) context);
}

Example 17 with MVELDialectRuntimeData

use of org.drools.core.rule.MVELDialectRuntimeData in project jbpm by kiegroup.

the class MVELReturnValueEvaluatorBuilder method buildReturnValueEvaluator.

public void buildReturnValueEvaluator(final PackageBuildContext context, final ReturnValueConstraintEvaluator constraintNode, final ReturnValueDescr descr, final ContextResolver contextResolver, final MVELDialect dialect, final MVELAnalysisResult analysis, final String text, Map<String, Class<?>> variables) throws Exception {
    Set<String> variableNames = analysis.getNotBoundedIdentifiers();
    if (contextResolver != null) {
        for (String variableName : variableNames) {
            if (analysis.getMvelVariables().keySet().contains(variableName) || variableName.equals("kcontext") || variableName.equals("context")) {
                continue;
            }
            VariableScope variableScope = (VariableScope) contextResolver.resolveContext(VariableScope.VARIABLE_SCOPE, variableName);
            if (variableScope == null) {
                context.getErrors().add(new DescrBuildError(context.getParentDescr(), descr, null, "Could not find variable '" + variableName + "' for action '" + descr.getText() + "'"));
            } else {
                variables.put(variableName, context.getDialect().getTypeResolver().resolveType(variableScope.findVariable(variableName).getType().getStringType()));
            }
        }
    }
    MVELCompilationUnit unit = dialect.getMVELCompilationUnit(text, analysis, null, null, variables, context, "context", org.kie.api.runtime.process.ProcessContext.class, false, MVELCompilationUnit.Scope.EXPRESSION);
    // MVELReturnValueExpression expr = new MVELReturnValueExpression( unit, context.getDialect().getId() );
    MVELReturnValueEvaluator expr = new MVELReturnValueEvaluator(unit, dialect.getId());
    // expr.setVariableNames(variableNames);
    constraintNode.setEvaluator(expr);
    MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData(dialect.getId());
    data.addCompileable(constraintNode, expr);
    expr.compile(data);
    collectTypes("MVELReturnValue", analysis, (ProcessBuildContext) context);
}

Example 18 with MVELDialectRuntimeData

use of org.drools.core.rule.MVELDialectRuntimeData in project drools by kiegroup.

the class PatternBuilder method setInputs.

protected void setInputs(RuleBuildContext context, ExprBindings descrBranch, Class<?> thisClass, String expr) {
    MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
    ParserConfiguration conf = data.getParserConfiguration();
    conf.setClassLoader(context.getKnowledgeBuilder().getRootClassLoader());
    final ParserContext pctx = new ParserContext(conf);
    pctx.setStrictTypeEnforcement(false);
    pctx.setStrongTyping(false);
    pctx.addInput("this", thisClass);
    // overrides the mvel empty label
    pctx.addInput("empty", boolean.class);
    MVEL.COMPILER_OPT_ALLOW_NAKED_METH_CALL = true;
    MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING = true;
    MVEL.COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION = true;
    MVEL.COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS = true;
    try {
        MVEL.analysisCompile(expr, pctx);
    } catch (Exception e) {
        // reported during expression analysis, so swallow it at the moment
        return;
    }
    if (!pctx.getInputs().isEmpty()) {
        for (String v : pctx.getInputs().keySet()) {
            // to an "empty" property, or the if will evaluate to true even if it doesn't
            if ("this".equals(v) || (PropertyTools.getFieldOrAccessor(thisClass, v) != null && expr.matches("(^|.*\\W)empty($|\\W.*)"))) {
                descrBranch.getFieldAccessors().add(v);
            } else if ("empty".equals(v)) {
            // do nothing
            } else if (!context.getPkg().getGlobals().containsKey(v)) {
                descrBranch.getRuleBindings().add(v);
            } else {
                descrBranch.getGlobalBindings().add(v);
            }
        }
    }
}

Example 19 with MVELDialectRuntimeData

use of org.drools.core.rule.MVELDialectRuntimeData in project drools by kiegroup.

the class MVELAccumulateBuilder method build.

@SuppressWarnings("unchecked")
public RuleConditionElement build(final RuleBuildContext context, final BaseDescr descr, final Pattern prefixPattern) {
    boolean typesafe = context.isTypesafe();
    try {
        final AccumulateDescr accumDescr = (AccumulateDescr) descr;
        if (!accumDescr.hasValidInput()) {
            return null;
        }
        final RuleConditionBuilder builder = (RuleConditionBuilder) context.getDialect().getBuilder(accumDescr.getInput().getClass());
        // create source CE
        final RuleConditionElement source = builder.build(context, accumDescr.getInput());
        if (source == null) {
            return null;
        }
        MVELDialect dialect = (MVELDialect) context.getDialect();
        Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
        Map<String, Declaration> sourceOuterDeclr = source.getOuterDeclarations();
        Map<String, Class<?>> declarationClasses = DeclarationScopeResolver.getDeclarationClasses(decls);
        declarationClasses.putAll(DeclarationScopeResolver.getDeclarationClasses(sourceOuterDeclr));
        BoundIdentifiers boundIds = new BoundIdentifiers(declarationClasses, context);
        final boolean readLocalsFromTuple = PackageBuilderUtil.isReadLocalsFromTuple(context, accumDescr, source);
        Accumulator[] accumulators;
        if (accumDescr.isExternalFunction()) {
            // uses accumulate functions
            accumulators = buildExternalFunctions(context, accumDescr, dialect, decls, sourceOuterDeclr, boundIds, readLocalsFromTuple);
        } else {
            // it is a custom accumulate
            accumulators = buildCustomAccumulate(context, accumDescr, dialect, decls, sourceOuterDeclr, boundIds, readLocalsFromTuple);
        }
        List<Declaration> requiredDeclarations = new ArrayList<Declaration>();
        for (Accumulator acc : accumulators) {
            MvelAccumulator mvelAcc = (MvelAccumulator) acc;
            Collections.addAll(requiredDeclarations, mvelAcc.getRequiredDeclarations());
        }
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
        Accumulate accumulate;
        if (accumDescr.isMultiFunction()) {
            accumulate = new MultiAccumulate(source, requiredDeclarations.toArray(new Declaration[requiredDeclarations.size()]), accumulators);
            int index = 0;
            for (Accumulator accumulator : accumulators) {
                data.addCompileable(((MultiAccumulate) accumulate).new Wirer(index++), (MVELCompileable) accumulator);
                ((MVELCompileable) accumulator).compile(data, context.getRule());
            }
        } else {
            accumulate = new SingleAccumulate(source, requiredDeclarations.toArray(new Declaration[requiredDeclarations.size()]), accumulators[0]);
            data.addCompileable(((SingleAccumulate) accumulate).new Wirer(), (MVELCompileable) accumulators[0]);
            ((MVELCompileable) accumulators[0]).compile(data, context.getRule());
        }
        return accumulate;
    } catch (Exception e) {
        DialectUtil.copyErrorLocation(e, descr);
        context.addError(new DescrBuildError(context.getParentDescr(), descr, e, "Unable to build expression for 'accumulate' : " + e.getMessage()));
        return null;
    } finally {
        context.setTypesafe(typesafe);
    }
}

Example 20 with MVELDialectRuntimeData

use of org.drools.core.rule.MVELDialectRuntimeData in project drools by kiegroup.

the class MVELEvalBuilder method build.

/**
 * Builds and returns an Eval Conditional Element
 *
 * @param context The current build context
 * @param descr The Eval Descriptor to build the eval conditional element from
 *
 * @return the Eval Conditional Element
 */
public RuleConditionElement build(final RuleBuildContext context, final BaseDescr descr, final Pattern prefixPattern) {
    boolean typesafe = context.isTypesafe();
    // it must be an EvalDescr
    final EvalDescr evalDescr = (EvalDescr) descr;
    try {
        MVELDialect dialect = (MVELDialect) context.getDialect("mvel");
        Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
        AnalysisResult analysis = context.getDialect().analyzeExpression(context, evalDescr, evalDescr.getContent(), new BoundIdentifiers(DeclarationScopeResolver.getDeclarationClasses(decls), context));
        final BoundIdentifiers usedIdentifiers = analysis.getBoundIdentifiers();
        int i = usedIdentifiers.getDeclrClasses().keySet().size();
        Declaration[] previousDeclarations = new Declaration[i];
        i = 0;
        for (String id : usedIdentifiers.getDeclrClasses().keySet()) {
            previousDeclarations[i++] = decls.get(id);
        }
        Arrays.sort(previousDeclarations, SortDeclarations.instance);
        MVELCompilationUnit unit = dialect.getMVELCompilationUnit((String) evalDescr.getContent(), analysis, previousDeclarations, null, null, context, "drools", KnowledgeHelper.class, false, MVELCompilationUnit.Scope.EXPRESSION);
        final EvalCondition eval = new EvalCondition(previousDeclarations);
        MVELEvalExpression expr = new MVELEvalExpression(unit, dialect.getId());
        eval.setEvalExpression(KiePolicyHelper.isPolicyEnabled() ? new SafeEvalExpression(expr) : expr);
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
        data.addCompileable(eval, expr);
        expr.compile(data, context.getRule());
        return eval;
    } catch (final Exception e) {
        copyErrorLocation(e, evalDescr);
        context.addError(new DescrBuildError(context.getParentDescr(), evalDescr, e, "Unable to build expression for 'eval':" + e.getMessage() + " '" + evalDescr.getContent() + "'"));
        return null;
    } finally {
        context.setTypesafe(typesafe);
    }
}