Examples with Statement org.codehaus.groovy.ast.stmt.Statement used on opensource projects

Example 11 with Statement

use of org.codehaus.groovy.ast.stmt.Statement in project groovy-core by groovy.

the class TraitComposer method doCreateSuperForwarder.

/**
     * Creates a method to dispatch to "super traits" in a "stackable" fashion. The generated method looks like this:
     * <p>
     * <code>ReturnType trait$super$method(Class clazz, Arg1 arg1, Arg2 arg2, ...) {
     *     if (SomeTrait.is(A) { return SomeOtherTrait$Trait$Helper.method(this, arg1, arg2) }
     *     super.method(arg1,arg2)
     * }</code>
     * </p>
     * @param targetNode
     * @param forwarderMethod
     * @param interfacesToGenerateForwarderFor
     * @param genericsSpec
     */
private static void doCreateSuperForwarder(ClassNode targetNode, MethodNode forwarderMethod, ClassNode[] interfacesToGenerateForwarderFor, Map<String, ClassNode> genericsSpec) {
    Parameter[] parameters = forwarderMethod.getParameters();
    Parameter[] superForwarderParams = new Parameter[parameters.length];
    for (int i = 0; i < parameters.length; i++) {
        Parameter parameter = parameters[i];
        ClassNode originType = parameter.getOriginType();
        superForwarderParams[i] = new Parameter(correctToGenericsSpecRecurse(genericsSpec, originType), parameter.getName());
    }
    for (int i = 0; i < interfacesToGenerateForwarderFor.length; i++) {
        final ClassNode current = interfacesToGenerateForwarderFor[i];
        final ClassNode next = i < interfacesToGenerateForwarderFor.length - 1 ? interfacesToGenerateForwarderFor[i + 1] : null;
        String forwarderName = Traits.getSuperTraitMethodName(current, forwarderMethod.getName());
        if (targetNode.getDeclaredMethod(forwarderName, superForwarderParams) == null) {
            ClassNode returnType = correctToGenericsSpecRecurse(genericsSpec, forwarderMethod.getReturnType());
            Statement delegate = next == null ? createSuperFallback(forwarderMethod, returnType) : createDelegatingForwarder(forwarderMethod, next);
            MethodNode methodNode = targetNode.addMethod(forwarderName, Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC, returnType, superForwarderParams, ClassNode.EMPTY_ARRAY, delegate);
            methodNode.setGenericsTypes(forwarderMethod.getGenericsTypes());
        }
    }
}

Example 12 with Statement

use of org.codehaus.groovy.ast.stmt.Statement in project groovy-core by groovy.

the class TraitComposer method applyTrait.

private static void applyTrait(final ClassNode trait, final ClassNode cNode, final TraitHelpersTuple helpers) {
    ClassNode helperClassNode = helpers.getHelper();
    ClassNode fieldHelperClassNode = helpers.getFieldHelper();
    Map<String, ClassNode> genericsSpec = GenericsUtils.createGenericsSpec(cNode);
    genericsSpec = GenericsUtils.createGenericsSpec(trait, genericsSpec);
    for (MethodNode methodNode : helperClassNode.getAllDeclaredMethods()) {
        String name = methodNode.getName();
        Parameter[] helperMethodParams = methodNode.getParameters();
        boolean isAbstract = methodNode.isAbstract();
        if (!isAbstract && helperMethodParams.length > 0 && ((methodNode.getModifiers() & Opcodes.ACC_STATIC) == Opcodes.ACC_STATIC) && !name.contains("$")) {
            ArgumentListExpression argList = new ArgumentListExpression();
            argList.addExpression(new VariableExpression("this"));
            Parameter[] origParams = new Parameter[helperMethodParams.length - 1];
            Parameter[] params = new Parameter[helperMethodParams.length - 1];
            System.arraycopy(methodNode.getParameters(), 1, params, 0, params.length);
            Map<String, ClassNode> methodGenericsSpec = new LinkedHashMap<String, ClassNode>(genericsSpec);
            MethodNode originalMethod = trait.getMethod(name, params);
            // Original method may be null in case of a private method
            if (originalMethod != null) {
                methodGenericsSpec = GenericsUtils.addMethodGenerics(originalMethod, methodGenericsSpec);
            }
            for (int i = 1; i < helperMethodParams.length; i++) {
                Parameter parameter = helperMethodParams[i];
                ClassNode originType = parameter.getOriginType();
                ClassNode fixedType = correctToGenericsSpecRecurse(methodGenericsSpec, originType);
                Parameter newParam = new Parameter(fixedType, "arg" + i);
                List<AnnotationNode> copied = new LinkedList<AnnotationNode>();
                List<AnnotationNode> notCopied = new LinkedList<AnnotationNode>();
                GeneralUtils.copyAnnotatedNodeAnnotations(parameter, copied, notCopied);
                newParam.addAnnotations(copied);
                params[i - 1] = newParam;
                origParams[i - 1] = parameter;
                argList.addExpression(new VariableExpression(params[i - 1]));
            }
            createForwarderMethod(trait, cNode, methodNode, originalMethod, helperClassNode, methodGenericsSpec, helperMethodParams, origParams, params, argList);
        }
    }
    cNode.addObjectInitializerStatements(new ExpressionStatement(new MethodCallExpression(new ClassExpression(helperClassNode), Traits.INIT_METHOD, new ArgumentListExpression(new VariableExpression("this")))));
    MethodCallExpression staticInitCall = new MethodCallExpression(new ClassExpression(helperClassNode), Traits.STATIC_INIT_METHOD, new ArgumentListExpression(new ClassExpression(cNode)));
    MethodNode staticInitMethod = new MethodNode(Traits.STATIC_INIT_METHOD, Opcodes.ACC_STATIC | Opcodes.ACC_PUBLIC, ClassHelper.VOID_TYPE, new Parameter[] { new Parameter(ClassHelper.CLASS_Type, "clazz") }, ClassNode.EMPTY_ARRAY, EmptyStatement.INSTANCE);
    staticInitMethod.setDeclaringClass(helperClassNode);
    staticInitCall.setMethodTarget(staticInitMethod);
    cNode.addStaticInitializerStatements(Collections.<Statement>singletonList(new ExpressionStatement(staticInitCall)), false);
    if (fieldHelperClassNode != null && !cNode.declaresInterface(fieldHelperClassNode)) {
        // we should implement the field helper interface too
        cNode.addInterface(fieldHelperClassNode);
        // implementation of methods
        List<MethodNode> declaredMethods = fieldHelperClassNode.getAllDeclaredMethods();
        Collections.sort(declaredMethods, GETTER_FIRST_COMPARATOR);
        for (MethodNode methodNode : declaredMethods) {
            String fieldName = methodNode.getName();
            if (fieldName.endsWith(Traits.DIRECT_GETTER_SUFFIX) || fieldName.endsWith(Traits.DIRECT_SETTER_SUFFIX)) {
                int suffixIdx = fieldName.lastIndexOf("$");
                fieldName = fieldName.substring(0, suffixIdx);
                String operation = methodNode.getName().substring(suffixIdx + 1);
                boolean getter = "get".equals(operation);
                ClassNode returnType = correctToGenericsSpecRecurse(genericsSpec, methodNode.getReturnType());
                int isStatic = 0;
                boolean publicField = true;
                FieldNode helperField = fieldHelperClassNode.getField(Traits.FIELD_PREFIX + Traits.PUBLIC_FIELD_PREFIX + fieldName);
                if (helperField == null) {
                    publicField = false;
                    helperField = fieldHelperClassNode.getField(Traits.FIELD_PREFIX + Traits.PRIVATE_FIELD_PREFIX + fieldName);
                }
                if (helperField == null) {
                    publicField = true;
                    // try to find a static one
                    helperField = fieldHelperClassNode.getField(Traits.STATIC_FIELD_PREFIX + Traits.PUBLIC_FIELD_PREFIX + fieldName);
                    if (helperField == null) {
                        publicField = false;
                        helperField = fieldHelperClassNode.getField(Traits.STATIC_FIELD_PREFIX + Traits.PRIVATE_FIELD_PREFIX + fieldName);
                    }
                    isStatic = Opcodes.ACC_STATIC;
                }
                if (getter) {
                    // add field
                    if (helperField != null) {
                        List<AnnotationNode> copied = new LinkedList<AnnotationNode>();
                        List<AnnotationNode> notCopied = new LinkedList<AnnotationNode>();
                        GeneralUtils.copyAnnotatedNodeAnnotations(helperField, copied, notCopied);
                        FieldNode fieldNode = cNode.addField(fieldName, (publicField ? Opcodes.ACC_PUBLIC : Opcodes.ACC_PRIVATE) | isStatic, returnType, null);
                        fieldNode.addAnnotations(copied);
                    }
                }
                Parameter[] newParams;
                if (getter) {
                    newParams = Parameter.EMPTY_ARRAY;
                } else {
                    ClassNode originType = methodNode.getParameters()[0].getOriginType();
                    ClassNode fixedType = originType.isGenericsPlaceHolder() ? ClassHelper.OBJECT_TYPE : correctToGenericsSpecRecurse(genericsSpec, originType);
                    newParams = new Parameter[] { new Parameter(fixedType, "val") };
                }
                Expression fieldExpr = new VariableExpression(cNode.getField(fieldName));
                Statement body = getter ? new ReturnStatement(fieldExpr) : new ExpressionStatement(new BinaryExpression(fieldExpr, Token.newSymbol(Types.EQUAL, 0, 0), new VariableExpression(newParams[0])));
                MethodNode impl = new MethodNode(methodNode.getName(), Opcodes.ACC_PUBLIC | isStatic, returnType, newParams, ClassNode.EMPTY_ARRAY, body);
                AnnotationNode an = new AnnotationNode(COMPILESTATIC_CLASSNODE);
                impl.addAnnotation(an);
                cNode.addTransform(StaticCompileTransformation.class, an);
                cNode.addMethod(impl);
            }
        }
    }
}

Example 13 with Statement

use of org.codehaus.groovy.ast.stmt.Statement in project groovy-core by groovy.

the class TraitComposer method createDelegatingForwarder.

private static Statement createDelegatingForwarder(final MethodNode forwarderMethod, final ClassNode next) {
    // generates --> next$Trait$Helper.method(this, arg1, arg2)
    TraitHelpersTuple helpers = Traits.findHelpers(next);
    ArgumentListExpression args = new ArgumentListExpression();
    args.addExpression(new VariableExpression("this"));
    Parameter[] forwarderMethodParameters = forwarderMethod.getParameters();
    for (final Parameter forwarderMethodParameter : forwarderMethodParameters) {
        args.addExpression(new VariableExpression(forwarderMethodParameter));
    }
    StaticMethodCallExpression delegateCall = new StaticMethodCallExpression(helpers.getHelper(), forwarderMethod.getName(), args);
    Statement result;
    if (ClassHelper.VOID_TYPE.equals(forwarderMethod.getReturnType())) {
        BlockStatement stmt = new BlockStatement();
        stmt.addStatement(new ExpressionStatement(delegateCall));
        stmt.addStatement(new ReturnStatement(new ConstantExpression(null)));
        result = stmt;
    } else {
        result = new ReturnStatement(delegateCall);
    }
    return result;
}

Example 14 with Statement

use of org.codehaus.groovy.ast.stmt.Statement in project grails-core by grails.

the class ASTValidationErrorsHelper method addGetErrorsMethod.

protected void addGetErrorsMethod(final ClassNode paramTypeClassNode) {
    final ASTNode getErrorsMethod = paramTypeClassNode.getMethod(GET_ERRORS_METHOD_NAME, GrailsArtefactClassInjector.ZERO_PARAMETERS);
    if (getErrorsMethod == null) {
        final BlockStatement getErrorsMethodCode = new BlockStatement();
        final Expression initErrorsMethodCallExpression = new MethodCallExpression(new VariableExpression("this"), INIT_ERRORS_METHOD_NAME, EMPTY_TUPLE);
        getErrorsMethodCode.addStatement(new ExpressionStatement(initErrorsMethodCallExpression));
        final Statement returnStatement = new ReturnStatement(ERRORS_EXPRESSION);
        getErrorsMethodCode.addStatement(returnStatement);
        paramTypeClassNode.addMethod(new MethodNode(GET_ERRORS_METHOD_NAME, Modifier.PUBLIC, ERRORS_CLASS_NODE, GrailsArtefactClassInjector.ZERO_PARAMETERS, GrailsArtefactClassInjector.EMPTY_CLASS_ARRAY, getErrorsMethodCode));
    }
}

Example 15 with Statement

use of org.codehaus.groovy.ast.stmt.Statement in project grails-core by grails.

the class ASTValidationErrorsHelper method addHasErrorsMethod.

protected void addHasErrorsMethod(final ClassNode paramTypeClassNode) {
    final ASTNode getErrorsMethod = paramTypeClassNode.getMethod(HAS_ERRORS_METHOD_NAME, GrailsArtefactClassInjector.ZERO_PARAMETERS);
    if (getErrorsMethod == null) {
        final BlockStatement hasErrorsMethodCode = new BlockStatement();
        final Expression initErrorsMethodCallExpression = new MethodCallExpression(new VariableExpression("this"), INIT_ERRORS_METHOD_NAME, EMPTY_TUPLE);
        hasErrorsMethodCode.addStatement(new ExpressionStatement(initErrorsMethodCallExpression));
        final Statement returnStatement = new ReturnStatement(new BooleanExpression(new MethodCallExpression(ERRORS_EXPRESSION, HAS_ERRORS_METHOD_NAME, EMPTY_TUPLE)));
        hasErrorsMethodCode.addStatement(returnStatement);
        paramTypeClassNode.addMethod(new MethodNode(HAS_ERRORS_METHOD_NAME, Modifier.PUBLIC, new ClassNode(Boolean.class), GrailsArtefactClassInjector.ZERO_PARAMETERS, GrailsArtefactClassInjector.EMPTY_CLASS_ARRAY, hasErrorsMethodCode));
    }
}