Package org.codehaus.groovy.ast

Examples of org.codehaus.groovy.ast.MethodNode

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                throw new GroovyRuntimeException(
                        "Could not find the ClassNode for MetaClass: " + closure.getMetaClass());
            }
            List methods = classNode.getDeclaredMethods("doCall");
            if (!methods.isEmpty()) {
                MethodNode method = (MethodNode) methods.get(0);
                if (method != null) {
                    Statement statement = method.getCode();
                    if (statement != null) {
                        statement.visit(visitor);
                    }
                }
            }
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        checkDetectsDuplicateMethods(ACC_INTERFACE, EXPECTED_DUPLICATE_METHOD_ERROR_INTERFACE_MESSAGE, stringParam);
    }

    private void checkDetectsDuplicateMethods(int modifiers, String expectedErrorMessage, Parameter[] params) {
        ClassNode node = new ClassNode("zzz", modifiers, ClassHelper.OBJECT_TYPE);
        node.addMethod(new MethodNode("xxx", ACC_PUBLIC, ClassHelper.OBJECT_TYPE, params, ClassNode.EMPTY_ARRAY, null));
        node.addMethod(new MethodNode("xxx", ACC_PUBLIC, ClassHelper.OBJECT_TYPE, params, ClassNode.EMPTY_ARRAY, null));
        verifier.visitClass(node);
        checkErrorCount(2);
        checkErrorMessage(expectedErrorMessage);
    }
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        checkErrorMessage(EXPECTED_INTERFACE_MODIFIER_ERROR_MESSAGE);
    }

    public void testDetectsFinalAndStaticMethodsInInterface() throws Exception {
        ClassNode node = new ClassNode("zzz", ACC_ABSTRACT | ACC_INTERFACE, ClassHelper.OBJECT_TYPE);
        node.addMethod(new MethodNode("xxx", ACC_PUBLIC | ACC_FINAL, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        node.addMethod(new MethodNode("yyy", ACC_PUBLIC | ACC_STATIC, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        // constructors should not be treated as errors (they have no real meaning for interfaces anyway)
        node.addMethod(new MethodNode("<clinit>", ACC_PUBLIC | ACC_STATIC, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        verifier.visitClass(node);
        checkErrorCount(2);
        checkErrorMessage(EXPECTED_INTERFACE_FINAL_METHOD_ERROR_MESSAGE);
        checkErrorMessage(EXPECTED_INTERFACE_STATIC_METHOD_ERROR_MESSAGE);
    }
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    }

    public void testDetectsIncorrectMethodModifiersInInterface() throws Exception {
        // TODO: can't check volatile here as it doubles up with bridge
        ClassNode node = new ClassNode("zzz", ACC_ABSTRACT | ACC_INTERFACE, ClassHelper.OBJECT_TYPE);
        node.addMethod(new MethodNode("st", ACC_STRICT, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        node.addMethod(new MethodNode("na", ACC_NATIVE, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        node.addMethod(new MethodNode("sy", ACC_SYNCHRONIZED, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        // constructors should not be treated as errors (they have no real meaning for interfaces anyway)
        node.addMethod(new MethodNode("<clinit>", ACC_PUBLIC | ACC_STATIC, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        verifier.visitClass(node);
        checkErrorCount(3);
        checkErrorMessage(EXPECTED_STRICT_METHOD_ERROR_MESSAGE);
        checkErrorMessage(EXPECTED_NATIVE_METHOD_ERROR_MESSAGE);
        checkErrorMessage(EXPECTED_SYNCHRONIZED_METHOD_ERROR_MESSAGE);
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    }

    public void testDetectsCorrectMethodModifiersInClass() throws Exception {
        // TODO: can't check volatile here as it doubles up with bridge
        ClassNode node = new ClassNode("zzz", ACC_PUBLIC, ClassHelper.OBJECT_TYPE);
        node.addMethod(new MethodNode("st", ACC_STRICT, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        node.addMethod(new MethodNode("na", ACC_NATIVE, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        node.addMethod(new MethodNode("sy", ACC_SYNCHRONIZED, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        // constructors should not be treated as errors (they have no real meaning for interfaces anyway)
        node.addMethod(new MethodNode("<clinit>", ACC_PUBLIC | ACC_STATIC, ClassHelper.OBJECT_TYPE, Parameter.EMPTY_ARRAY, ClassNode.EMPTY_ARRAY, null));
        verifier.visitClass(node);
        checkErrorCount(0);
    }
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        // add method dispatcher
        Parameter[] parameters = new Parameter[]{
                new Parameter(ClassHelper.STRING_TYPE, "name"),
                new Parameter(ClassHelper.OBJECT_TYPE, "args")
        };
        MethodNode method = node.addSyntheticMethod(
                "methodMissing",
                Opcodes.ACC_PUBLIC,
                ClassHelper.OBJECT_TYPE,
                parameters,
                ClassNode.EMPTY_ARRAY,
                null
        );

        BlockStatement block = new BlockStatement();
        if (isStatic) {
            setMethodDispatcherCode(block, new ClassExpression(node.getOuterClass()), parameters);
        } else {
            block.addStatement(
                    new BytecodeSequence(new BytecodeInstruction() {
                        public void visit(MethodVisitor mv) {
                            mv.visitVarInsn(ALOAD, 0);
                            mv.visitFieldInsn(GETFIELD, classInternalName, "this$0", outerClassDescriptor);
                            mv.visitVarInsn(ALOAD, 1);
                            mv.visitVarInsn(ALOAD, 2);
                            mv.visitMethodInsn(INVOKEVIRTUAL,
                                    outerClassInternalName,
                                    "this$dist$invoke$" + objectDistance,
                                    "(Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;");
                            mv.visitInsn(ARETURN);
                        }
                    })
            );
        }
        method.setCode(block);

        // add property getter dispatcher
        parameters = new Parameter[]{
                new Parameter(ClassHelper.STRING_TYPE, "name"),
                new Parameter(ClassHelper.OBJECT_TYPE, "val")
        };
        method = node.addSyntheticMethod(
                "propertyMissing",
                Opcodes.ACC_PUBLIC,
                ClassHelper.VOID_TYPE,
                parameters,
                ClassNode.EMPTY_ARRAY,
                null
        );

        block = new BlockStatement();
        if (isStatic) {
            setPropertySetterDispatcher(block, new ClassExpression(node.getOuterClass()), parameters);
        } else {
            block.addStatement(
                    new BytecodeSequence(new BytecodeInstruction() {
                        public void visit(MethodVisitor mv) {
                            mv.visitVarInsn(ALOAD, 0);
                            mv.visitFieldInsn(GETFIELD, classInternalName, "this$0", outerClassDescriptor);
                            mv.visitVarInsn(ALOAD, 1);
                            mv.visitVarInsn(ALOAD, 2);
                            mv.visitMethodInsn(INVOKEVIRTUAL,
                                    outerClassInternalName,
                                    "this$dist$set$" + objectDistance,
                                    "(Ljava/lang/String;Ljava/lang/Object;)V");
                            mv.visitInsn(RETURN);
                        }
                    })
            );
        }
        method.setCode(block);

        // add property setter dispatcher
        parameters = new Parameter[]{
                new Parameter(ClassHelper.STRING_TYPE, "name")
        };
        method = node.addSyntheticMethod(
                "propertyMissing",
                Opcodes.ACC_PUBLIC,
                ClassHelper.OBJECT_TYPE,
                parameters,
                ClassNode.EMPTY_ARRAY,
                null
        );

        block = new BlockStatement();
        if (isStatic) {
            setPropertyGetterDispatcher(block, new ClassExpression(node.getOuterClass()), parameters);
        } else {
            block.addStatement(
                    new BytecodeSequence(new BytecodeInstruction() {
                        public void visit(MethodVisitor mv) {
                            mv.visitVarInsn(ALOAD, 0);
                            mv.visitFieldInsn(GETFIELD, classInternalName, "this$0", outerClassDescriptor);
                            mv.visitVarInsn(ALOAD, 1);
                            mv.visitMethodInsn(INVOKEVIRTUAL,
                                    outerClassInternalName,
                                    "this$dist$get$" + objectDistance,
                                    "(Ljava/lang/String;)Ljava/lang/Object;");
                            mv.visitInsn(ARETURN);
                        }
                    })
            );
        }
        method.setCode(block);
    }
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                throw new GroovyRuntimeException(
                        "Could not find the ClassNode for MetaClass: " + closure.getMetaClass());
            }
            List methods = classNode.getDeclaredMethods("doCall");
            if (!methods.isEmpty()) {
                MethodNode method = (MethodNode) methods.get(0);
                if (method != null) {
                    Statement statement = method.getCode();
                    if (statement != null) {
                        statement.visit(visitor);
                    }
                }
            }
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    private void checkNoAbstractMethodsNonabstractClass(ClassNode node) {
        if (Modifier.isAbstract(node.getModifiers())) return;
        List abstractMethods = node.getAbstractMethods();
        if (abstractMethods == null) return;
        for (Iterator iter = abstractMethods.iterator(); iter.hasNext();) {
            MethodNode method = (MethodNode) iter.next();
            String methodName = method.getTypeDescriptor();
            addError("Can't have an abstract method in a non-abstract class." +
                    " The " + getDescription(node) + " must be declared abstract or" +
                    " the " + getDescription(method) + " must be implemented.", node);
        }
    }
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    private void checkMethodsForIncorrectModifiers(ClassNode cn) {
        if (!cn.isInterface()) return;
        List methods = cn.getMethods();
        for (Iterator cnIter = methods.iterator(); cnIter.hasNext();) {
            MethodNode method = (MethodNode) cnIter.next();
            if (Modifier.isFinal(method.getModifiers())) {
                addError("The " + getDescription(method) + " from " + getDescription(cn) +
                        " must not be final. It is by definition abstract.", method);
            }
            if (Modifier.isStatic(method.getModifiers()) && !isConstructor(method)) {
                addError("The " + getDescription(method) + " from " + getDescription(cn) +
                        " must not be static. Only fields may be static in an interface.", method);
            }
        }
    }
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    }

    private void checkMethodsForOverwritingFinal(ClassNode cn) {
        List methods = cn.getMethods();
        for (Iterator cnIter = methods.iterator(); cnIter.hasNext();) {
            MethodNode method = (MethodNode) cnIter.next();
            Parameter[] params = method.getParameters();
            List superMethods = cn.getSuperClass().getMethods(method.getName());
            for (Iterator iter = superMethods.iterator(); iter.hasNext();) {
                MethodNode superMethod = (MethodNode) iter.next();
                Parameter[] superParams = superMethod.getParameters();
                if (!hasEqualParameterTypes(params, superParams)) continue;
                if (!Modifier.isFinal(superMethod.getModifiers())) return;
                addInvalidUseOfFinalError(method, params, superMethod.getDeclaringClass());
                return;
            }
        }
    }
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