Examples with And org.mvel2.ast.And used on opensource projects

Example 21 with And

use of org.mvel2.ast.And in project mvel by mvel.

the class ASMAccessorOptimizer method getMethod.

@SuppressWarnings({ "unchecked" })
private Object getMethod(Object ctx, String name) throws IllegalAccessException, InvocationTargetException {
    assert debug("\n  **  {method: " + name + "}");
    int st = cursor;
    String tk = cursor != end && expr[cursor] == '(' && ((cursor = balancedCapture(expr, cursor, '(')) - st) > 1 ? new String(expr, st + 1, cursor - st - 1) : "";
    cursor++;
    Object[] preConvArgs;
    Object[] args;
    Class[] argTypes;
    ExecutableStatement[] es;
    List<char[]> subtokens;
    if (tk.length() == 0) {
        args = preConvArgs = ParseTools.EMPTY_OBJ_ARR;
        argTypes = ParseTools.EMPTY_CLS_ARR;
        es = null;
        subtokens = null;
    } else {
        subtokens = parseParameterList(tk.toCharArray(), 0, -1);
        es = new ExecutableStatement[subtokens.size()];
        args = new Object[subtokens.size()];
        argTypes = new Class[subtokens.size()];
        preConvArgs = new Object[es.length];
        for (int i = 0; i < subtokens.size(); i++) {
            assert debug("subtoken[" + i + "] { " + new String(subtokens.get(i)) + " }");
            preConvArgs[i] = args[i] = (es[i] = (ExecutableStatement) subCompileExpression(subtokens.get(i), pCtx)).getValue(this.thisRef, this.thisRef, variableFactory);
            if (es[i].isExplicitCast())
                argTypes[i] = es[i].getKnownEgressType();
        }
        if (pCtx.isStrictTypeEnforcement()) {
            for (int i = 0; i < args.length; i++) {
                argTypes[i] = es[i].getKnownEgressType();
            }
        } else {
            for (int i = 0; i < args.length; i++) {
                if (argTypes[i] != null)
                    continue;
                if (es[i].getKnownEgressType() == Object.class) {
                    argTypes[i] = args[i] == null ? null : args[i].getClass();
                } else {
                    argTypes[i] = es[i].getKnownEgressType();
                }
            }
        }
    }
    if (first && variableFactory != null && variableFactory.isResolveable(name)) {
        Object ptr = variableFactory.getVariableResolver(name).getValue();
        if (ptr instanceof Method) {
            ctx = ((Method) ptr).getDeclaringClass();
            name = ((Method) ptr).getName();
        } else if (ptr instanceof MethodStub) {
            ctx = ((MethodStub) ptr).getClassReference();
            name = ((MethodStub) ptr).getMethodName();
        } else if (ptr instanceof FunctionInstance) {
            if (es != null && es.length != 0) {
                compiledInputs.addAll(Arrays.asList(es));
                intPush(es.length);
                assert debug("ANEWARRAY [" + es.length + "]");
                mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
                assert debug("ASTORE 4");
                mv.visitVarInsn(ASTORE, 4);
                for (int i = 0; i < es.length; i++) {
                    assert debug("ALOAD 4");
                    mv.visitVarInsn(ALOAD, 4);
                    intPush(i);
                    loadField(i);
                    assert debug("ALOAD 1");
                    mv.visitVarInsn(ALOAD, 1);
                    assert debug("ALOAD 3");
                    mv.visitIntInsn(ALOAD, 3);
                    assert debug("INVOKEINTERFACE ExecutableStatement.getValue");
                    mv.visitMethodInsn(INVOKEINTERFACE, NAMESPACE + "compiler/ExecutableStatement", "getValue", "(Ljava/lang/Object;L" + NAMESPACE + "integration/VariableResolverFactory;)Ljava/lang/Object;");
                    assert debug("AASTORE");
                    mv.visitInsn(AASTORE);
                }
            } else {
                assert debug("ACONST_NULL");
                mv.visitInsn(ACONST_NULL);
                assert debug("CHECKCAST java/lang/Object");
                mv.visitTypeInsn(CHECKCAST, "[Ljava/lang/Object;");
                assert debug("ASTORE 4");
                mv.visitVarInsn(ASTORE, 4);
            }
            if (variableFactory.isIndexedFactory() && variableFactory.isTarget(name)) {
                loadVariableByIndex(variableFactory.variableIndexOf(name));
            } else {
                loadVariableByName(name);
            }
            checkcast(FunctionInstance.class);
            assert debug("ALOAD 1");
            mv.visitVarInsn(ALOAD, 1);
            assert debug("ALOAD 2");
            mv.visitVarInsn(ALOAD, 2);
            assert debug("ALOAD 3");
            mv.visitVarInsn(ALOAD, 3);
            assert debug("ALOAD 4");
            mv.visitVarInsn(ALOAD, 4);
            assert debug("INVOKEVIRTUAL Function.call");
            mv.visitMethodInsn(INVOKEVIRTUAL, getInternalName(FunctionInstance.class), "call", "(Ljava/lang/Object;Ljava/lang/Object;L" + NAMESPACE + "integration/VariableResolverFactory;[Ljava/lang/Object;)Ljava/lang/Object;");
            return ((FunctionInstance) ptr).call(ctx, thisRef, variableFactory, args);
        } else {
            throw new OptimizationFailure("attempt to optimize a method call for a reference that does not point to a method: " + name + " (reference is type: " + (ctx != null ? ctx.getClass().getName() : null) + ")");
        }
        first = false;
    } else if (returnType != null && returnType.isPrimitive()) {
        // noinspection unchecked
        wrapPrimitive(returnType);
    }
    /**
     * If the target object is an instance of java.lang.Class itself then do not
     * adjust the Class scope target.
     */
    boolean classTarget = false;
    Class<?> cls = currType != null ? currType : ((classTarget = ctx instanceof Class) ? (Class<?>) ctx : ctx.getClass());
    currType = null;
    Method m;
    Class[] parameterTypes = null;
    /**
     * Try to find an instance method from the class target.
     */
    if ((m = getBestCandidate(argTypes, name, cls, cls.getMethods(), false, classTarget)) != null) {
        parameterTypes = m.getParameterTypes();
    }
    if (m == null && classTarget) {
        /**
         * If we didn't find anything, maybe we're looking for the actual java.lang.Class methods.
         */
        if ((m = getBestCandidate(argTypes, name, cls, Class.class.getMethods(), false)) != null) {
            parameterTypes = m.getParameterTypes();
        }
    }
    // If we didn't find anything and the declared class is different from the actual one try also with the actual one
    if (m == null && cls != ctx.getClass() && !(ctx instanceof Class)) {
        cls = ctx.getClass();
        if ((m = getBestCandidate(argTypes, name, cls, cls.getMethods(), false, classTarget)) != null) {
            parameterTypes = m.getParameterTypes();
        }
    }
    if (es != null && m != null && m.isVarArgs() && (es.length != parameterTypes.length || !(es[es.length - 1] instanceof ExecutableAccessor))) {
        // normalize ExecutableStatement for varargs
        ExecutableStatement[] varArgEs = new ExecutableStatement[parameterTypes.length];
        int varArgStart = parameterTypes.length - 1;
        for (int i = 0; i < varArgStart; i++) varArgEs[i] = es[i];
        String varargsTypeName = parameterTypes[parameterTypes.length - 1].getComponentType().getName();
        String varArgExpr;
        if ("null".equals(tk)) {
            // if null is the token no need for wrapping
            varArgExpr = tk;
        } else {
            StringBuilder sb = new StringBuilder("new ").append(varargsTypeName).append("[] {");
            for (int i = varArgStart; i < subtokens.size(); i++) {
                sb.append(subtokens.get(i));
                if (i < subtokens.size() - 1)
                    sb.append(",");
            }
            varArgExpr = sb.append("}").toString();
        }
        char[] token = varArgExpr.toCharArray();
        varArgEs[varArgStart] = ((ExecutableStatement) subCompileExpression(token, pCtx));
        es = varArgEs;
        if (preConvArgs.length == parameterTypes.length - 1) {
            // empty vararg
            Object[] preConvArgsForVarArg = new Object[parameterTypes.length];
            for (int i = 0; i < preConvArgs.length; i++) preConvArgsForVarArg[i] = preConvArgs[i];
            preConvArgsForVarArg[parameterTypes.length - 1] = Array.newInstance(parameterTypes[parameterTypes.length - 1].getComponentType(), 0);
            preConvArgs = preConvArgsForVarArg;
        }
    }
    int inputsOffset = compiledInputs.size();
    if (es != null) {
        for (ExecutableStatement e : es) {
            if (e instanceof ExecutableLiteral) {
                continue;
            }
            compiledInputs.add(e);
        }
    }
    if (first) {
        assert debug("ALOAD 1 (D) ");
        mv.visitVarInsn(ALOAD, 1);
    }
    if (m == null) {
        StringAppender errorBuild = new StringAppender();
        if (parameterTypes != null) {
            for (int i = 0; i < args.length; i++) {
                errorBuild.append(parameterTypes[i] != null ? parameterTypes[i].getClass().getName() : null);
                if (i < args.length - 1)
                    errorBuild.append(", ");
            }
        }
        if ("size".equals(name) && args.length == 0 && cls.isArray()) {
            anyArrayCheck(cls);
            assert debug("ARRAYLENGTH");
            mv.visitInsn(ARRAYLENGTH);
            wrapPrimitive(int.class);
            return getLength(ctx);
        }
        throw new CompileException("unable to resolve method: " + cls.getName() + "." + name + "(" + errorBuild.toString() + ") [arglength=" + args.length + "]", expr, st);
    } else {
        m = getWidenedTarget(m);
        if (es != null) {
            ExecutableStatement cExpr;
            for (int i = 0; i < es.length; i++) {
                if ((cExpr = es[i]).getKnownIngressType() == null) {
                    cExpr.setKnownIngressType(parameterTypes[i]);
                    cExpr.computeTypeConversionRule();
                }
                if (!cExpr.isConvertableIngressEgress() && i < args.length) {
                    args[i] = convert(args[i], paramTypeVarArgsSafe(parameterTypes, i, m.isVarArgs()));
                }
            }
        } else {
            /**
             * Coerce any types if required.
             */
            for (int i = 0; i < args.length; i++) {
                args[i] = convert(args[i], paramTypeVarArgsSafe(parameterTypes, i, m.isVarArgs()));
            }
        }
        if (m.getParameterTypes().length == 0) {
            if ((m.getModifiers() & STATIC) != 0) {
                assert debug("INVOKESTATIC " + m.getName());
                mv.visitMethodInsn(INVOKESTATIC, getInternalName(m.getDeclaringClass()), m.getName(), getMethodDescriptor(m));
            } else {
                assert debug("CHECKCAST " + getInternalName(m.getDeclaringClass()));
                mv.visitTypeInsn(CHECKCAST, getInternalName(m.getDeclaringClass()));
                if (m.getDeclaringClass().isInterface()) {
                    assert debug("INVOKEINTERFACE " + m.getName());
                    mv.visitMethodInsn(INVOKEINTERFACE, getInternalName(m.getDeclaringClass()), m.getName(), getMethodDescriptor(m));
                } else {
                    assert debug("INVOKEVIRTUAL " + m.getName());
                    mv.visitMethodInsn(INVOKEVIRTUAL, getInternalName(m.getDeclaringClass()), m.getName(), getMethodDescriptor(m));
                }
            }
            returnType = m.getReturnType();
            stacksize++;
        } else {
            if ((m.getModifiers() & STATIC) == 0) {
                assert debug("CHECKCAST " + getInternalName(cls));
                mv.visitTypeInsn(CHECKCAST, getInternalName(cls));
            }
            Class<?> aClass = m.getParameterTypes()[m.getParameterTypes().length - 1];
            if (m.isVarArgs()) {
                if (es == null || es.length == (m.getParameterTypes().length - 1)) {
                    ExecutableStatement[] executableStatements = new ExecutableStatement[m.getParameterTypes().length];
                    if (es != null) {
                        System.arraycopy(es, 0, executableStatements, 0, es.length);
                    }
                    executableStatements[executableStatements.length - 1] = new ExecutableLiteral(Array.newInstance(aClass, 0));
                    es = executableStatements;
                }
            }
            for (int i = 0; es != null && i < es.length; i++) {
                if (es[i] instanceof ExecutableLiteral) {
                    ExecutableLiteral literal = (ExecutableLiteral) es[i];
                    if (literal.getLiteral() == null) {
                        assert debug("ICONST_NULL");
                        mv.visitInsn(ACONST_NULL);
                        continue;
                    } else if (parameterTypes[i] == int.class && literal.intOptimized()) {
                        intPush(literal.getInteger32());
                        continue;
                    } else if (parameterTypes[i] == int.class && preConvArgs[i] instanceof Integer) {
                        intPush((Integer) preConvArgs[i]);
                        continue;
                    } else if (parameterTypes[i] == boolean.class) {
                        boolean bool = DataConversion.convert(literal.getLiteral(), Boolean.class);
                        assert debug(bool ? "ICONST_1" : "ICONST_0");
                        mv.visitInsn(bool ? ICONST_1 : ICONST_0);
                        continue;
                    } else {
                        Object lit = literal.getLiteral();
                        if (parameterTypes[i] == Object.class) {
                            if (isPrimitiveWrapper(lit.getClass())) {
                                if (lit.getClass() == Integer.class) {
                                    intPush((Integer) lit);
                                } else {
                                    assert debug("LDC " + lit);
                                    mv.visitLdcInsn(lit);
                                }
                                wrapPrimitive(lit.getClass());
                            } else if (lit instanceof String) {
                                mv.visitLdcInsn(lit);
                                checkcast(Object.class);
                            }
                            continue;
                        } else if (canConvert(parameterTypes[i], lit.getClass())) {
                            Object c = convert(lit, parameterTypes[i]);
                            if (c instanceof Class) {
                                ldcClassConstant((Class) c);
                            } else {
                                assert debug("LDC " + lit + " (" + lit.getClass().getName() + ")");
                                mv.visitLdcInsn(convert(lit, parameterTypes[i]));
                                if (isPrimitiveWrapper(parameterTypes[i])) {
                                    wrapPrimitive(lit.getClass());
                                }
                            }
                            continue;
                        } else {
                            throw new OptimizationNotSupported();
                        }
                    }
                }
                assert debug("ALOAD 0");
                mv.visitVarInsn(ALOAD, 0);
                assert debug("GETFIELD p" + inputsOffset);
                mv.visitFieldInsn(GETFIELD, className, "p" + inputsOffset, "L" + NAMESPACE + "compiler/ExecutableStatement;");
                inputsOffset++;
                assert debug("ALOAD 2");
                mv.visitVarInsn(ALOAD, 2);
                assert debug("ALOAD 3");
                mv.visitVarInsn(ALOAD, 3);
                assert debug("INVOKEINTERFACE ExecutableStatement.getValue");
                mv.visitMethodInsn(INVOKEINTERFACE, getInternalName(ExecutableStatement.class), "getValue", "(Ljava/lang/Object;L" + NAMESPACE + "integration/VariableResolverFactory;)Ljava/lang/Object;");
                if (parameterTypes[i].isPrimitive()) {
                    if (preConvArgs[i] == null || (parameterTypes[i] != String.class && !parameterTypes[i].isAssignableFrom(preConvArgs[i].getClass()))) {
                        ldcClassConstant(getWrapperClass(parameterTypes[i]));
                        assert debug("INVOKESTATIC DataConversion.convert");
                        mv.visitMethodInsn(INVOKESTATIC, NAMESPACE + "DataConversion", "convert", "(Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;");
                    }
                    unwrapPrimitive(parameterTypes[i]);
                } else if (preConvArgs[i] == null || (parameterTypes[i] != String.class && !parameterTypes[i].isAssignableFrom(preConvArgs[i].getClass()))) {
                    ldcClassConstant(parameterTypes[i]);
                    assert debug("INVOKESTATIC DataConversion.convert");
                    mv.visitMethodInsn(INVOKESTATIC, NAMESPACE + "DataConversion", "convert", "(Ljava/lang/Object;Ljava/lang/Class;)Ljava/lang/Object;");
                    assert debug("CHECKCAST " + getInternalName(parameterTypes[i]));
                    mv.visitTypeInsn(CHECKCAST, getInternalName(parameterTypes[i]));
                } else if (parameterTypes[i] == String.class) {
                    assert debug("<<<DYNAMIC TYPE OPTIMIZATION STRING>>");
                    mv.visitMethodInsn(INVOKESTATIC, "java/lang/String", "valueOf", "(Ljava/lang/Object;)Ljava/lang/String;");
                } else {
                    assert debug("<<<DYNAMIC TYPING BYPASS>>>");
                    assert debug("<<<OPT. JUSTIFICATION " + parameterTypes[i] + "=" + preConvArgs[i].getClass() + ">>>");
                    assert debug("CHECKCAST " + getInternalName(parameterTypes[i]));
                    mv.visitTypeInsn(CHECKCAST, getInternalName(parameterTypes[i]));
                }
            }
            if ((m.getModifiers() & STATIC) != 0) {
                assert debug("INVOKESTATIC: " + m.getName());
                mv.visitMethodInsn(INVOKESTATIC, getInternalName(m.getDeclaringClass()), m.getName(), getMethodDescriptor(m));
            } else {
                if (m.getDeclaringClass().isInterface() && (m.getDeclaringClass() != cls || (ctx != null && ctx.getClass() != m.getDeclaringClass()))) {
                    assert debug("INVOKEINTERFACE: " + getInternalName(m.getDeclaringClass()) + "." + m.getName());
                    mv.visitMethodInsn(INVOKEINTERFACE, getInternalName(m.getDeclaringClass()), m.getName(), getMethodDescriptor(m));
                } else {
                    assert debug("INVOKEVIRTUAL: " + getInternalName(cls) + "." + m.getName());
                    mv.visitMethodInsn(INVOKEVIRTUAL, getInternalName(cls), m.getName(), getMethodDescriptor(m));
                }
            }
            returnType = m.getReturnType();
            stacksize++;
        }
        Object o = m.invoke(ctx, normalizeArgsForVarArgs(parameterTypes, args, m.isVarArgs()));
        if (hasNullMethodHandler()) {
            writeOutNullHandler(m, 1);
            if (o == null)
                o = getNullMethodHandler().getProperty(m.getName(), ctx, variableFactory);
        }
        currType = toNonPrimitiveType(m.getReturnType());
        return o;
    }
}

Example 22 with And

use of org.mvel2.ast.And in project mvel by mvel.

the class CoreConfidenceTests method testStringConcatenation.

public void testStringConcatenation() {
    // debugging MVEL code, it seems that MVEL 'thinks' that the result of the expression:
    // "Drop +5%: "+$sb+" avg: $"+$av+" price: $"+$pr
    // is a double, and as so, he looks for a method:
    // Services.log( double );
    // but finds only:
    // Services.log( String );
    // raising the error.
    String ex = "services.log((String) \"Drop +5%: \"+$sb+\" avg: $\"+$av+\" price: $\"+$pr );";
    ParserContext ctx = new ParserContext();
    ctx.setStrongTyping(true);
    ctx.addInput("$sb", String.class);
    ctx.addInput("$av", double.class);
    ctx.addInput("$pr", double.class);
    ctx.addInput("services", Services.class);
    try {
        ExpressionCompiler compiler = new ExpressionCompiler(ex, ctx);
        compiler.compile();
    } catch (Throwable e) {
        e.printStackTrace();
        fail("Should not raise exception: " + e.getMessage());
    }
}

Example 23 with And

use of org.mvel2.ast.And in project BroadleafCommerce by BroadleafCommerce.

the class MVELTest method testOfferAppliesToFulfillmentGroup.

// @Test
// No longer a valid test
// public void testMarkLawnmowerWhenOfferAppliesToHats() {
// OrderImpl order = new OrderImpl();
// ArrayList<OrderItem> items = new ArrayList<OrderItem>();
// order.setOrderItems(items);
// DiscreteOrderItemImpl item = new DiscreteOrderItemImpl();
// Money amount = new Money(10D);
// items.add(item);
// item.setSalePrice(amount);
// ProductImpl product = new ProductImpl();
// CategoryImpl category = new CategoryImpl();
// category.setName("hat");
// product.setDefaultCategory(category);
// item.setProduct(product);
// item.setQuantity(3);
// 
// DiscreteOrderItemImpl item2 = new DiscreteOrderItemImpl();
// Money amount2 = new Money(250D);
// items.add(item2);
// item2.setSalePrice(amount2);
// ProductImpl product2 = new ProductImpl();
// CategoryImpl category2 = new CategoryImpl();
// category2.setName("lawnmower");
// product2.setDefaultCategory(category2);
// item2.setProduct(product2);
// item2.setQuantity(1);
// 
// HashMap<String, Object> vars = new HashMap<String, Object>();
// vars.put("currentItem", item);
// vars.put("order", order);
// vars.put("doMark", true);
// 
// //This test makes use of the static MVEL function "orderContains(quantity)".
// StringBuffer expression = new StringBuffer(functions);
// expression.append("def evalItemForOrderContains(item) {")
// .append("             return item.product.defaultCategory.name == 'lawnmower'")
// .append("          } ")
// .append("          return (orderContainsPlusMark(1) and currentItem.product.defaultCategory.name == 'hat');");
// 
// Boolean result = (Boolean)MVEL.eval(expression.toString(), vars);
// assert result != null && result;
// assert item2.getMarkedForOffer() == 1;
// assert item.getMarkedForOffer() == 0;
// }
@Test
public void testOfferAppliesToFulfillmentGroup() {
    OrderImpl order = new OrderImpl();
    order.setSubTotal(new Money(110D));
    FulfillmentGroupImpl group = new FulfillmentGroupImpl();
    group.setPrimary(true);
    OfferImpl offer = new OfferImpl();
    offer.setType(OfferType.FULFILLMENT_GROUP);
    order.getFulfillmentGroups().add(group);
    // Set up MVEL Context
    ParserContext context = new ParserContext();
    // Import OfferType into the MVEL context since it may be used
    context.addImport("OfferType", OfferType.class);
    context.addImport("FulfillmentType", FulfillmentType.class);
    // Compile the MVEL Expression
    // This could test SHIPPING, or PICK_UP_AT_STORE, etc.
    // Could also apply to order instead of FULFILLMENT_GROUP
    Serializable domainExp1 = MVEL.compileExpression("offer.type.equals(OfferType.FULFILLMENT_GROUP) and (($ in order.fulfillmentGroups if $.type.equals(FulfillmentType.PHYSICAL)) != empty)", context);
    // Add variables to a HashMap that should be passed in to execute the expression
    HashMap<String, Object> domainVars = new HashMap<>();
    domainVars.put("order", order);
    domainVars.put("offer", offer);
    // Execute the expression
    Boolean expressionOutcome1 = (Boolean) MVEL.executeExpression(domainExp1, domainVars);
    assert expressionOutcome1 != null && expressionOutcome1;
}

Example 24 with And

use of org.mvel2.ast.And in project BroadleafCommerce by BroadleafCommerce.

the class MVELTest method testOfferAppliesToSpecificItems.

@Test
public void testOfferAppliesToSpecificItems() {
    DiscreteOrderItemImpl orderItem = new DiscreteOrderItemImpl();
    Sku sku = new SkuImpl();
    sku.setRetailPrice(new Money("1"));
    sku.setId(1234L);
    orderItem.setSku(sku);
    OfferImpl offer = new OfferImpl();
    offer.setType(OfferType.ORDER_ITEM);
    // Set up MVEL Context
    ParserContext context = new ParserContext();
    // Import OfferType into the MVEL context since it may be used
    context.addImport("OfferType", OfferType.class);
    context.addImport("FulfillmentType", FulfillmentType.class);
    // Compile the MVEL Expression
    Serializable domainExp1 = MVEL.compileExpression("offer.type == OfferType.ORDER_ITEM and (currentItem.sku.id in [1234, 2345, 5678])", context);
    // Add variables to a HashMap that should be passed in to execute the expression
    HashMap<String, Object> domainVars = new HashMap<>();
    domainVars.put("currentItem", orderItem);
    domainVars.put("offer", offer);
    // Execute the expression
    Boolean expressionOutcome1 = (Boolean) MVEL.executeExpression(domainExp1, domainVars);
    assert expressionOutcome1 != null && expressionOutcome1;
}

Example 25 with And

use of org.mvel2.ast.And in project BroadleafCommerce by BroadleafCommerce.

the class MVELTest method testOfferAppliesToItemsInCategoryAndOrderValueGreaterThanFifty.

@Test
@Transactional
public void testOfferAppliesToItemsInCategoryAndOrderValueGreaterThanFifty() {
    // ----------------------------------------------------------------------------------------------------
    // Mock up some order data
    OrderImpl order = new OrderImpl();
    CategoryImpl category = new CategoryImpl();
    category.setName("t-shirt");
    Product product = createProduct();
    DiscreteOrderItemImpl orderItem = new DiscreteOrderItemImpl();
    ArrayList<CategoryProductXref> categories = new ArrayList<>();
    CategoryProductXref categoryXref = new CategoryProductXrefImpl();
    categoryXref.setProduct(product);
    categoryXref.setCategory(category);
    categories.add(categoryXref);
    product.setAllParentCategoryXrefs(categories);
    orderItem.setProduct(product);
    order.getOrderItems().add(orderItem);
    order.setSubTotal(new Money(110D));
    // Set up MVEL Context
    ParserContext context = new ParserContext();
    // Import OfferType into the MVEL context since it may be used
    context.addImport("OfferType", OfferType.class);
    // Compile the MVEL Expression
    Serializable domainExp1 = MVEL.compileExpression("result = false; for (cat : currentItem.product.allParentCategories) {if (cat.name == 't-shirt') {result = true;}}; return result and order.subTotal.amount >= 50", context);
    // Add variables to a HashMap that should be passed in to execute the expression
    HashMap<String, Object> domainVars = new HashMap<>();
    domainVars.put("order", order);
    domainVars.put("currentItem", orderItem);
    // Execute the expression
    Boolean expressionOutcome1 = (Boolean) MVEL.executeExpression(domainExp1, domainVars);
    assert expressionOutcome1 != null && expressionOutcome1;
    // Do the same thing using a different expression.
    Serializable domainExp2 = MVEL.compileExpression("($ in currentItem.product.allParentCategories if $.name == 't-shirt') != empty and order.subTotal.amount >= 50", context);
    Boolean expressionOutcome2 = (Boolean) MVEL.executeExpression(domainExp2, domainVars);
    assert expressionOutcome2 != null && expressionOutcome2;
}