Examples with ParserConfiguration org.mvel2.ParserConfiguration used on opensource projects

Example 61 with ParserConfiguration

use of org.mvel2.ParserConfiguration in project drools by kiegroup.

the class MvelConstraintTestUtil method getParserConfiguration.

@Override
protected ParserConfiguration getParserConfiguration(InternalWorkingMemory workingMemory) {
    ParserConfiguration parserConfiguration = new ParserConfiguration();
    parserConfiguration.addImport(Cheese.class);
    return parserConfiguration;
}

Example 62 with ParserConfiguration

use of org.mvel2.ParserConfiguration in project drools by kiegroup.

the class MVELExprAnalyzer method analyzeExpression.

// ------------------------------------------------------------
// Instance methods
// ------------------------------------------------------------
/**
 * Analyze an expression.
 *
 * @param expr
 *            The expression to analyze.
 * @param availableIdentifiers
 *            Total set of declarations available.
 *
 * @return The <code>Set</code> of declarations used by the expression.
 * @throws RecognitionException
 *             If an error occurs in the parser.
 */
@SuppressWarnings("unchecked")
public static MVELAnalysisResult analyzeExpression(final PackageBuildContext context, final String expr, final BoundIdentifiers availableIdentifiers, final Map<String, Class<?>> localTypes, String contextIdentifier, Class kcontextClass) {
    if (expr.trim().length() <= 0) {
        MVELAnalysisResult result = analyze((Set<String>) Collections.EMPTY_SET, availableIdentifiers);
        result.setMvelVariables(new HashMap<String, Class<?>>());
        result.setTypesafe(true);
        return result;
    }
    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;
    MVELDialect dialect = (MVELDialect) context.getDialect("mvel");
    ParserConfiguration conf = context.getMVELDialectRuntimeData().getParserConfiguration();
    conf.setClassLoader(context.getKnowledgeBuilder().getRootClassLoader());
    // first compilation is for verification only
    // @todo proper source file name
    final ParserContext parserContext1 = new ParserContext(conf);
    if (localTypes != null) {
        for (Entry entry : localTypes.entrySet()) {
            parserContext1.addInput((String) entry.getKey(), (Class) entry.getValue());
        }
    }
    if (availableIdentifiers.getThisClass() != null) {
        parserContext1.addInput("this", availableIdentifiers.getThisClass());
    }
    if (availableIdentifiers.getOperators() != null) {
        for (Entry<String, EvaluatorWrapper> opEntry : availableIdentifiers.getOperators().entrySet()) {
            parserContext1.addInput(opEntry.getKey(), opEntry.getValue().getClass());
        }
    }
    parserContext1.setStrictTypeEnforcement(false);
    parserContext1.setStrongTyping(false);
    parserContext1.setInterceptors(dialect.getInterceptors());
    Class<?> returnType;
    try {
        returnType = MVEL.analyze(expr, parserContext1);
    } catch (Exception e) {
        BaseDescr base = (context instanceof RuleBuildContext) ? ((RuleBuildContext) context).getRuleDescr() : context.getParentDescr();
        if (e instanceof CompileException && e.getCause() != null && e.getMessage().startsWith("[Error: null]")) {
            // rewrite error message in cause original message is null
            e = new CompileException(e.getCause().toString(), ((CompileException) e).getExpr(), ((CompileException) e).getCursor(), e.getCause());
        }
        DialectUtil.copyErrorLocation(e, context.getParentDescr());
        context.addError(new DescrBuildError(base, context.getParentDescr(), null, "Unable to Analyse Expression " + expr + ":\n" + e.getMessage()));
        return null;
    }
    Set<String> requiredInputs = new HashSet<String>();
    requiredInputs.addAll(parserContext1.getInputs().keySet());
    HashMap<String, Class<?>> variables = (HashMap<String, Class<?>>) ((Map) parserContext1.getVariables());
    if (localTypes != null) {
        for (String str : localTypes.keySet()) {
            // we have to do this due to mvel regressions on detecting true local vars
            variables.remove(str);
        }
    }
    // MVEL includes direct fields of context object in non-strict mode. so we need to strip those
    if (availableIdentifiers.getThisClass() != null) {
        requiredInputs.removeIf(s -> PropertyTools.getFieldOrAccessor(availableIdentifiers.getThisClass(), s) != null);
    }
    // now, set the required input types and compile again
    final ParserContext parserContext2 = new ParserContext(conf);
    parserContext2.setStrictTypeEnforcement(true);
    parserContext2.setStrongTyping(true);
    parserContext2.setInterceptors(dialect.getInterceptors());
    for (String input : requiredInputs) {
        if ("this".equals(input)) {
            continue;
        }
        Class<?> cls = availableIdentifiers.resolveType(input);
        if (cls == null) {
            if (input.equals(contextIdentifier) || input.equals("kcontext")) {
                cls = kcontextClass;
            } else if (input.equals("rule")) {
                cls = Rule.class;
            } else if (localTypes != null) {
                cls = localTypes.get(input);
            }
        }
        if (cls != null) {
            parserContext2.addInput(input, cls);
        }
    }
    if (availableIdentifiers.getThisClass() != null) {
        parserContext2.addInput("this", availableIdentifiers.getThisClass());
    }
    boolean typesafe = context.isTypesafe();
    try {
        returnType = MVEL.analyze(expr, parserContext2);
        typesafe = true;
    } catch (Exception e) {
        // is this an error, or can we fall back to non-typesafe mode?
        if (typesafe) {
            BaseDescr base = (context instanceof RuleBuildContext) ? ((RuleBuildContext) context).getRuleDescr() : context.getParentDescr();
            DialectUtil.copyErrorLocation(e, context.getParentDescr());
            context.addError(new DescrBuildError(base, context.getParentDescr(), null, "Unable to Analyse Expression " + expr + ":\n" + e.getMessage()));
            return null;
        }
    }
    if (typesafe) {
        requiredInputs = new HashSet<String>();
        requiredInputs.addAll(parserContext2.getInputs().keySet());
        requiredInputs.addAll(variables.keySet());
        variables = (HashMap<String, Class<?>>) ((Map) parserContext2.getVariables());
        if (localTypes != null) {
            for (String str : localTypes.keySet()) {
                // we have to do this due to mvel regressions on detecting true local vars
                variables.remove(str);
            }
        }
    }
    MVELAnalysisResult result = analyze(requiredInputs, availableIdentifiers);
    result.setReturnType(returnType);
    result.setMvelVariables(variables);
    result.setTypesafe(typesafe);
    return result;
}

Example 63 with ParserConfiguration

use of org.mvel2.ParserConfiguration in project drools by kiegroup.

the class MVELExprAnalyzer method getExpressionType.

public static Class<?> getExpressionType(PackageBuildContext context, Map<String, Class<?>> declCls, RuleConditionElement source, String expression) {
    MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
    ParserConfiguration conf = data.getParserConfiguration();
    conf.setClassLoader(context.getKnowledgeBuilder().getRootClassLoader());
    ParserContext pctx = new ParserContext(conf);
    pctx.setStrongTyping(true);
    pctx.setStrictTypeEnforcement(true);
    for (Map.Entry<String, Class<?>> entry : declCls.entrySet()) {
        pctx.addInput(entry.getKey(), entry.getValue());
    }
    for (Declaration decl : source.getOuterDeclarations().values()) {
        pctx.addInput(decl.getBindingName(), decl.getDeclarationClass());
    }
    try {
        return MVEL.analyze(expression, pctx);
    } catch (Exception e) {
        log.warn("Unable to parse expression: " + expression, e);
    }
    return null;
}

Example 64 with ParserConfiguration

use of org.mvel2.ParserConfiguration in project drools by kiegroup.

the class MVELCompilationUnit method getCompiledExpression.

public Serializable getCompiledExpression(MVELDialectRuntimeData runtimeData, Object evaluationContext) {
    ParserConfiguration conf = runtimeData.getParserConfiguration();
    final ParserContext parserContext = new ParserContext(conf, evaluationContext);
    if (MVELDebugHandler.isDebugMode()) {
        parserContext.setDebugSymbols(true);
    }
    parserContext.setStrictTypeEnforcement(strictMode);
    parserContext.setStrongTyping(strictMode);
    parserContext.setIndexAllocation(true);
    if (INTERCEPTORS != null) {
        parserContext.setInterceptors(INTERCEPTORS);
    }
    parserContext.addIndexedInput(inputIdentifiers);
    String identifier = null;
    String type = null;
    try {
        for (int i = 0, length = inputIdentifiers.length; i < length; i++) {
            identifier = inputIdentifiers[i];
            type = inputTypes[i];
            Class<?> cls = loadClass(runtimeData.getPackageClassLoader(), inputTypes[i]);
            parserContext.addInput(inputIdentifiers[i], cls);
        }
    } catch (ClassNotFoundException e) {
        throw new RuntimeException("Unable to resolve class '" + type + "' for identifier '" + identifier);
    }
    parserContext.setSourceFile(name);
    String[] varNames = parserContext.getIndexedVarNames();
    ExecutableStatement stmt = (ExecutableStatement) compile(expression, parserContext);
    Set<String> localNames = parserContext.getVariables().keySet();
    parserContext.addIndexedLocals(localNames);
    String[] locals = localNames.toArray(new String[localNames.size()]);
    String[] allVars = new String[varNames.length + locals.length];
    System.arraycopy(varNames, 0, allVars, 0, varNames.length);
    System.arraycopy(locals, 0, allVars, varNames.length, locals.length);
    this.varModel = new SimpleVariableSpaceModel(allVars);
    this.allVarsLength = allVars.length;
    return stmt;
}

Example 65 with ParserConfiguration

use of org.mvel2.ParserConfiguration in project drools by kiegroup.

the class MVELConstraintBuilder method setExprInputs.

@Override
public void setExprInputs(RuleBuildContext context, PatternBuilder.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);
            }
        }
    }
}