Examples with DeclarationExpression org.codehaus.groovy.ast.expr.DeclarationExpression used on opensource projects

Example 6 with DeclarationExpression

use of org.codehaus.groovy.ast.expr.DeclarationExpression in project groovy by apache.

the class AbstractInterruptibleASTTransformation method visit.

public void visit(ASTNode[] nodes, SourceUnit source) {
    if (nodes.length != 2 || !(nodes[0] instanceof AnnotationNode) || !(nodes[1] instanceof AnnotatedNode)) {
        internalError("Expecting [AnnotationNode, AnnotatedNode] but got: " + Arrays.asList(nodes));
    }
    this.source = source;
    AnnotationNode node = (AnnotationNode) nodes[0];
    AnnotatedNode annotatedNode = (AnnotatedNode) nodes[1];
    if (!type().equals(node.getClassNode())) {
        internalError("Transformation called from wrong annotation: " + node.getClassNode().getName());
    }
    setupTransform(node);
    // should be limited to the current SourceUnit or propagated to the whole CompilationUnit
    final ModuleNode tree = source.getAST();
    if (applyToAllClasses) {
        // guard every class and method defined in this script
        if (tree != null) {
            final List<ClassNode> classes = tree.getClasses();
            for (ClassNode classNode : classes) {
                visitClass(classNode);
            }
        }
    } else if (annotatedNode instanceof ClassNode) {
        // only guard this particular class
        this.visitClass((ClassNode) annotatedNode);
    } else if (!applyToAllMembers && annotatedNode instanceof MethodNode) {
        this.visitMethod((MethodNode) annotatedNode);
        this.visitClass(annotatedNode.getDeclaringClass());
    } else if (!applyToAllMembers && annotatedNode instanceof FieldNode) {
        this.visitField((FieldNode) annotatedNode);
        this.visitClass(annotatedNode.getDeclaringClass());
    } else if (!applyToAllMembers && annotatedNode instanceof DeclarationExpression) {
        this.visitDeclarationExpression((DeclarationExpression) annotatedNode);
        this.visitClass(annotatedNode.getDeclaringClass());
    } else {
        // only guard the script class
        if (tree != null) {
            final List<ClassNode> classes = tree.getClasses();
            for (ClassNode classNode : classes) {
                if (classNode.isScript()) {
                    visitClass(classNode);
                }
            }
        }
    }
}

Example 7 with DeclarationExpression

use of org.codehaus.groovy.ast.expr.DeclarationExpression in project groovy by apache.

the class BaseScriptASTTransformation method visit.

public void visit(ASTNode[] nodes, SourceUnit source) {
    init(nodes, source);
    AnnotatedNode parent = (AnnotatedNode) nodes[1];
    AnnotationNode node = (AnnotationNode) nodes[0];
    if (!MY_TYPE.equals(node.getClassNode()))
        return;
    if (parent instanceof DeclarationExpression) {
        changeBaseScriptTypeFromDeclaration((DeclarationExpression) parent, node);
    } else if (parent instanceof ImportNode || parent instanceof PackageNode) {
        changeBaseScriptTypeFromPackageOrImport(source, parent, node);
    } else if (parent instanceof ClassNode) {
        changeBaseScriptTypeFromClass((ClassNode) parent, node);
    }
}

Example 8 with DeclarationExpression

use of org.codehaus.groovy.ast.expr.DeclarationExpression in project groovy by apache.

the class BaseScriptASTTransformation method changeBaseScriptTypeFromDeclaration.

private void changeBaseScriptTypeFromDeclaration(final DeclarationExpression de, final AnnotationNode node) {
    if (de.isMultipleAssignmentDeclaration()) {
        addError("Annotation " + MY_TYPE_NAME + " not supported with multiple assignment notation.", de);
        return;
    }
    if (!(de.getRightExpression() instanceof EmptyExpression)) {
        addError("Annotation " + MY_TYPE_NAME + " not supported with variable assignment.", de);
        return;
    }
    Expression value = node.getMember("value");
    if (value != null) {
        addError("Annotation " + MY_TYPE_NAME + " cannot have member 'value' if used on a declaration.", value);
        return;
    }
    ClassNode cNode = de.getDeclaringClass();
    ClassNode baseScriptType = de.getVariableExpression().getType().getPlainNodeReference();
    de.setRightExpression(new VariableExpression("this"));
    changeBaseScriptType(de, cNode, baseScriptType);
}

Example 9 with DeclarationExpression

use of org.codehaus.groovy.ast.expr.DeclarationExpression in project groovy-core by groovy.

the class Verifier method addDefaultParameterMethods.

/**
     * Creates a new helper method for each combination of default parameter expressions
     */
protected void addDefaultParameterMethods(final ClassNode node) {
    List methods = new ArrayList(node.getMethods());
    addDefaultParameters(methods, new DefaultArgsAction() {

        public void call(ArgumentListExpression arguments, Parameter[] newParams, MethodNode method) {
            final BlockStatement code = new BlockStatement();
            MethodNode newMethod = new MethodNode(method.getName(), method.getModifiers(), method.getReturnType(), newParams, method.getExceptions(), code);
            // GROOVY-5681 and GROOVY-5632
            for (Expression argument : arguments.getExpressions()) {
                if (argument instanceof CastExpression) {
                    argument = ((CastExpression) argument).getExpression();
                }
                if (argument instanceof ConstructorCallExpression) {
                    ClassNode type = argument.getType();
                    if (type instanceof InnerClassNode && ((InnerClassNode) type).isAnonymous()) {
                        type.setEnclosingMethod(newMethod);
                    }
                }
                // check whether closure shared variables refer to params with default values (GROOVY-5632)
                if (argument instanceof ClosureExpression) {
                    final List<Parameter> newMethodNodeParameters = Arrays.asList(newParams);
                    CodeVisitorSupport visitor = new CodeVisitorSupport() {

                        @Override
                        public void visitVariableExpression(VariableExpression expression) {
                            Variable v = expression.getAccessedVariable();
                            if (!(v instanceof Parameter))
                                return;
                            Parameter param = (Parameter) v;
                            if (param.hasInitialExpression() && code.getVariableScope().getDeclaredVariable(param.getName()) == null && !newMethodNodeParameters.contains(param)) {
                                VariableExpression localVariable = new VariableExpression(param.getName(), ClassHelper.makeReference());
                                DeclarationExpression declarationExpression = new DeclarationExpression(localVariable, Token.newSymbol(Types.EQUAL, -1, -1), new ConstructorCallExpression(ClassHelper.makeReference(), param.getInitialExpression()));
                                code.addStatement(new ExpressionStatement(declarationExpression));
                                code.getVariableScope().putDeclaredVariable(localVariable);
                            }
                        }
                    };
                    visitor.visitClosureExpression((ClosureExpression) argument);
                }
            }
            MethodCallExpression expression = new MethodCallExpression(VariableExpression.THIS_EXPRESSION, method.getName(), arguments);
            expression.setMethodTarget(method);
            expression.setImplicitThis(true);
            if (method.isVoidMethod()) {
                code.addStatement(new ExpressionStatement(expression));
            } else {
                code.addStatement(new ReturnStatement(expression));
            }
            List<AnnotationNode> annotations = method.getAnnotations();
            if (annotations != null) {
                newMethod.addAnnotations(annotations);
            }
            MethodNode oldMethod = node.getDeclaredMethod(method.getName(), newParams);
            if (oldMethod != null) {
                throw new RuntimeParserException("The method with default parameters \"" + method.getTypeDescriptor() + "\" defines a method \"" + newMethod.getTypeDescriptor() + "\" that is already defined.", method);
            }
            addPropertyMethod(newMethod);
            newMethod.setGenericsTypes(method.getGenericsTypes());
        }
    });
}

Example 10 with DeclarationExpression

use of org.codehaus.groovy.ast.expr.DeclarationExpression in project grails-core by grails.

the class ControllerActionTransformer method wrapMethodBodyWithExceptionHandling.

/**
     * This will wrap the method body in a try catch block which does something
     * like this:
     * <pre>
     * try {
     *     // original method body here
     * } catch (Exception $caughtException) {
     *     Method $method = getExceptionHandlerMethod($caughtException.getClass())
     *     if($method) {
     *         return $method.invoke(this, $caughtException)
     *     } else {
     *         throw $caughtException
     *     }
     * }
     * </pre>
     * @param methodNode the method to add the try catch block to
     */
protected void wrapMethodBodyWithExceptionHandling(final ClassNode controllerClassNode, final MethodNode methodNode) {
    final BlockStatement catchBlockCode = new BlockStatement();
    final String caughtExceptionArgumentName = "$caughtException";
    final Expression caughtExceptionVariableExpression = new VariableExpression(caughtExceptionArgumentName);
    final Expression caughtExceptionTypeExpression = new PropertyExpression(caughtExceptionVariableExpression, "class");
    final Expression thisExpression = new VariableExpression("this");
    final MethodCallExpression getExceptionHandlerMethodCall = new MethodCallExpression(thisExpression, "getExceptionHandlerMethodFor", caughtExceptionTypeExpression);
    applyDefaultMethodTarget(getExceptionHandlerMethodCall, controllerClassNode);
    final ClassNode reflectMethodClassNode = new ClassNode(Method.class);
    final String exceptionHandlerMethodVariableName = "$method";
    final Expression exceptionHandlerMethodExpression = new VariableExpression(exceptionHandlerMethodVariableName, new ClassNode(Method.class));
    final Expression declareExceptionHandlerMethod = new DeclarationExpression(new VariableExpression(exceptionHandlerMethodVariableName, reflectMethodClassNode), Token.newSymbol(Types.EQUALS, 0, 0), getExceptionHandlerMethodCall);
    final ArgumentListExpression invokeArguments = new ArgumentListExpression();
    invokeArguments.addExpression(thisExpression);
    invokeArguments.addExpression(caughtExceptionVariableExpression);
    final MethodCallExpression invokeExceptionHandlerMethodExpression = new MethodCallExpression(new VariableExpression(exceptionHandlerMethodVariableName), "invoke", invokeArguments);
    applyDefaultMethodTarget(invokeExceptionHandlerMethodExpression, reflectMethodClassNode);
    final Statement returnStatement = new ReturnStatement(invokeExceptionHandlerMethodExpression);
    final Statement throwCaughtExceptionStatement = new ThrowStatement(caughtExceptionVariableExpression);
    final Statement ifExceptionHandlerMethodExistsStatement = new IfStatement(new BooleanExpression(exceptionHandlerMethodExpression), returnStatement, throwCaughtExceptionStatement);
    catchBlockCode.addStatement(new ExpressionStatement(declareExceptionHandlerMethod));
    catchBlockCode.addStatement(ifExceptionHandlerMethodExistsStatement);
    final CatchStatement catchStatement = new CatchStatement(new Parameter(new ClassNode(Exception.class), caughtExceptionArgumentName), catchBlockCode);
    final Statement methodBody = methodNode.getCode();
    BlockStatement tryBlock = new BlockStatement();
    BlockStatement codeToHandleAllowedMethods = getCodeToHandleAllowedMethods(controllerClassNode, methodNode.getName());
    tryBlock.addStatement(codeToHandleAllowedMethods);
    tryBlock.addStatement(methodBody);
    final TryCatchStatement tryCatchStatement = new TryCatchStatement(tryBlock, new EmptyStatement());
    tryCatchStatement.addCatch(catchStatement);
    final ArgumentListExpression argumentListExpression = new ArgumentListExpression();
    argumentListExpression.addExpression(new ConstantExpression(ALLOWED_METHODS_HANDLED_ATTRIBUTE_NAME));
    final PropertyExpression requestPropertyExpression = new PropertyExpression(new VariableExpression("this"), "request");
    final Expression removeAttributeMethodCall = new MethodCallExpression(requestPropertyExpression, "removeAttribute", argumentListExpression);
    final Expression getAttributeMethodCall = new MethodCallExpression(requestPropertyExpression, "getAttribute", new ArgumentListExpression(new ConstantExpression(ALLOWED_METHODS_HANDLED_ATTRIBUTE_NAME)));
    final VariableExpression attributeValueExpression = new VariableExpression("$allowed_methods_attribute_value", ClassHelper.make(Object.class));
    final Expression initializeAttributeValue = new DeclarationExpression(attributeValueExpression, Token.newSymbol(Types.EQUALS, 0, 0), getAttributeMethodCall);
    final Expression attributeValueMatchesMethodNameExpression = new BinaryExpression(new ConstantExpression(methodNode.getName()), Token.newSymbol(Types.COMPARE_EQUAL, 0, 0), attributeValueExpression);
    final Statement ifAttributeValueMatchesMethodName = new IfStatement(new BooleanExpression(attributeValueMatchesMethodNameExpression), new ExpressionStatement(removeAttributeMethodCall), new EmptyStatement());
    final BlockStatement blockToRemoveAttribute = new BlockStatement();
    blockToRemoveAttribute.addStatement(new ExpressionStatement(initializeAttributeValue));
    blockToRemoveAttribute.addStatement(ifAttributeValueMatchesMethodName);
    final TryCatchStatement tryCatchToRemoveAttribute = new TryCatchStatement(blockToRemoveAttribute, new EmptyStatement());
    tryCatchToRemoveAttribute.addCatch(new CatchStatement(new Parameter(ClassHelper.make(Exception.class), "$exceptionRemovingAttribute"), new EmptyStatement()));
    tryCatchStatement.setFinallyStatement(tryCatchToRemoveAttribute);
    methodNode.setCode(tryCatchStatement);
}