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

Example 26 with MVELDialectRuntimeData

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

the class MVELObjectExpressionBuilder method build.

public static MVELObjectExpression build(String expression, RuleBuildContext context) {
    boolean typesafe = context.isTypesafe();
    // pushing consequence LHS into the stack for variable resolution
    context.getDeclarationResolver().pushOnBuildStack(context.getRule().getLhs());
    try {
        // This builder is re-usable in other dialects, so specify by name
        MVELDialect dialect = (MVELDialect) context.getDialect("mvel");
        Map<String, Declaration> decls = context.getDeclarationResolver().getDeclarations(context.getRule());
        MVELAnalysisResult analysis = (MVELAnalysisResult) dialect.analyzeExpression(context, context.getRuleDescr(), expression, new BoundIdentifiers(DeclarationScopeResolver.getDeclarationClasses(decls), context));
        context.setTypesafe(analysis.isTypesafe());
        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, RuleTerminalNode.SortDeclarations.instance);
        MVELCompilationUnit unit = dialect.getMVELCompilationUnit(expression, analysis, previousDeclarations, null, null, context, "drools", KnowledgeHelper.class, false, MVELCompilationUnit.Scope.EXPRESSION);
        MVELObjectExpression expr = new MVELObjectExpression(unit, dialect.getId());
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
        data.addCompileable(context.getRule(), expr);
        expr.compile(data);
        return expr;
    } catch (final Exception e) {
        DialectUtil.copyErrorLocation(e, context.getRuleDescr());
        context.addError(new DescrBuildError(context.getParentDescr(), context.getRuleDescr(), null, "Unable to build expression : " + e.getMessage() + "'" + expression + "'"));
        return null;
    } finally {
        context.setTypesafe(typesafe);
    }
}

Example 27 with MVELDialectRuntimeData

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

the class MVELClassFieldExtractorTest method testIsNullValue.

@Test
public void testIsNullValue() {
    try {
        assertFalse(this.extractor.isNullValue(null, this.person[0]));
        MVELObjectClassFieldReader nullExtractor = (MVELObjectClassFieldReader) store.getMVELReader(Person.class.getPackage().getName(), Person.class.getName(), "addresses['business'].phone", true, String.class);
        MVELDialectRuntimeData data = new MVELDialectRuntimeData();
        data.addImport(Person.class.getSimpleName(), Person.class);
        data.onAdd(null, ProjectClassLoader.createProjectClassLoader());
        nullExtractor.compile(data);
        // 
        // InternalReadAccessor nullExtractor = store.getReader( Person.class,
        // "addresses['business'].phone",
        // getClass().getClassLoader() );
        assertTrue(nullExtractor.isNullValue(null, this.person[0]));
    } catch (final Exception e) {
        fail("Should not throw an exception");
    }
}

Example 28 with MVELDialectRuntimeData

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

the class ScenarioTest method createContext.

public BuildContext createContext() {
    RuleBaseConfiguration conf = new RuleBaseConfiguration();
    KnowledgeBaseImpl rbase = new KnowledgeBaseImpl("ID", conf);
    BuildContext buildContext = new BuildContext(rbase);
    RuleImpl rule = new RuleImpl("rule1").setPackage("org.pkg1");
    InternalKnowledgePackage pkg = new KnowledgePackageImpl("org.pkg1");
    pkg.getDialectRuntimeRegistry().setDialectData("mvel", new MVELDialectRuntimeData());
    pkg.addRule(rule);
    buildContext.setRule(rule);
    return buildContext;
}

Example 29 with MVELDialectRuntimeData

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

the class MVELAccumulator method init.

/* (non-Javadoc)
     * @see org.kie.spi.Accumulator#init(java.lang.Object, org.kie.spi.Tuple, org.kie.rule.Declaration[], org.kie.WorkingMemory)
     */
public void init(Object workingMemoryContext, Object context, Tuple tuple, Declaration[] declarations, WorkingMemory workingMemory) throws Exception {
    Object[] localVars = new Object[initUnit.getOtherIdentifiers().length];
    MVELAccumulatorFactoryContext factoryContext = (MVELAccumulatorFactoryContext) workingMemoryContext;
    VariableResolverFactory factory = factoryContext.getInitFactory();
    initUnit.updateFactory(null, tuple, localVars, (InternalWorkingMemory) workingMemory, workingMemory.getGlobalResolver(), factory);
    InternalKnowledgePackage pkg = workingMemory.getKnowledgeBase().getPackage("MAIN");
    if (pkg != null) {
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) pkg.getDialectRuntimeRegistry().getDialectData("mvel");
        factory.setNextFactory(data.getFunctionFactory());
    }
    MVELSafeHelper.getEvaluator().executeExpression(this.init, null, factory);
    DroolsVarFactory df = (DroolsVarFactory) factory.getNextFactory();
    if (localVars.length > 0) {
        for (int i = 0; i < df.getOtherVarsLength(); i++) {
            localVars[i] = factory.getIndexedVariableResolver(df.getOtherVarsPos() + i).getValue();
        }
    }
    ((MVELAccumulatorContext) context).setVariables(localVars);
}

Example 30 with MVELDialectRuntimeData

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

the class MVELConsequence method evaluate.

public void evaluate(final KnowledgeHelper knowledgeHelper, final WorkingMemory workingMemory) throws Exception {
    VariableResolverFactory factory = unit.getFactory(knowledgeHelper, ((AgendaItem) knowledgeHelper.getMatch()).getTerminalNode().getRequiredDeclarations(), knowledgeHelper.getRule(), knowledgeHelper.getTuple(), null, (InternalWorkingMemory) workingMemory, workingMemory.getGlobalResolver());
    // do we have any functions for this namespace?
    InternalKnowledgePackage pkg = workingMemory.getKnowledgeBase().getPackage("MAIN");
    if (pkg != null) {
        MVELDialectRuntimeData data = (MVELDialectRuntimeData) pkg.getDialectRuntimeRegistry().getDialectData(this.id);
        factory.setNextFactory(data.getFunctionFactory());
    }
    CompiledExpression compexpr = (CompiledExpression) this.expr;
    if (MVELDebugHandler.isDebugMode()) {
        if (MVELDebugHandler.verbose) {
            logger.info(DebugTools.decompile(compexpr));
        }
        MVEL.executeDebugger(compexpr, knowledgeHelper, factory);
    } else {
        MVEL.executeExpression(compexpr, knowledgeHelper, factory);
    }
}