antlrparserplugin.java

来自「大名鼎鼎的java动态脚本语言。已经通过了sun的认证」· Java 代码 · 共 1,799 行 · 第 1/5 页

                case VARIABLE_DEF:
                    fieldDef(node);
                    break;

                case STATIC_INIT:
                    staticInit(node);
                    break;
                    
                case INSTANCE_INIT:
                    objectInit(node);
                    break;
                    
                default:
                    unknownAST(node);
            }
        }
    }
    
    protected void throwsList(AST node,List list) {
    	String clazz = identifier(node);
    	ClassNode exception = ClassHelper.make(clazz);
    	list.add(exception);
    	AST next = node.getNextSibling();
    	if (next!=null) throwsList(next, list);
    	next = node.getFirstChild();
    	if (next!=null) throwsList(next, list);
    }

    protected void methodDef(AST methodDef) {
        List annotations = new ArrayList();
        AST node = methodDef.getFirstChild();
        int modifiers = Opcodes.ACC_PUBLIC;
        if (isType(MODIFIERS, node)) {
            modifiers = modifiers(node, annotations, modifiers);
            node = node.getNextSibling();
        }

        if (classNode!=null && (classNode.getModifiers() & Opcodes.ACC_INTERFACE) >0) {
            modifiers |= Opcodes.ACC_ABSTRACT;
        }

        ClassNode returnType = null;
        if (isType(TYPE, node)) {
            returnType = makeType(node);
            node = node.getNextSibling();
        }

        String name = identifier(node);
        if (classNode != null) {
            if (classNode.getNameWithoutPackage().equals(name)) {
                throw new ASTRuntimeException(methodDef, "Invalid constructor format. Try remove the 'def' expression?");
            }
        }
        node = node.getNextSibling();

        assertNodeType(PARAMETERS, node);
        Parameter[] parameters = parameters(node);
        if (parameters==null) parameters = Parameter.EMPTY_ARRAY;
        node = node.getNextSibling();
        
        ClassNode[] exceptions=new ClassNode[0];
        if (isType(LITERAL_throws, node)) {
        	AST throwsNode = node.getFirstChild();
        	List exceptionList = new ArrayList();
        	throwsList(throwsNode, exceptionList);
        	exceptions = (ClassNode[]) exceptionList.toArray(exceptions);
        	node = node.getNextSibling();
        }

        Statement code = null;
        if ((modifiers & Opcodes.ACC_ABSTRACT) == 0) {
            if (node==null) {
                throw new ASTRuntimeException(methodDef, "You defined a method without body. Try adding a body, or declare it abstract.");
            }
            assertNodeType(SLIST, node);
            code = statementList(node);
        }

        MethodNode methodNode = new MethodNode(name, modifiers, returnType, parameters, exceptions, code);
        methodNode.addAnnotations(annotations);
        configureAST(methodNode, methodDef);
        if (classNode != null) {
            classNode.addMethod(methodNode);
        }
        else {
            output.addMethod(methodNode);
        }
    }
    
    protected void staticInit(AST staticInit) {        
        BlockStatement code = (BlockStatement) statementList(staticInit);
        classNode.addStaticInitializerStatements(code.getStatements(),false);
    }
    
    protected void objectInit(AST init) {        
        BlockStatement code = (BlockStatement) statementList(init);
        classNode.addObjectInitializerStatements(code);
    }
    
    protected void constructorDef(AST constructorDef) {
        List annotations = new ArrayList();
        AST node = constructorDef.getFirstChild();
        int modifiers = Opcodes.ACC_PUBLIC;
        if (isType(MODIFIERS, node)) {
            modifiers = modifiers(node, annotations, modifiers);
            node = node.getNextSibling();
        }

        assertNodeType(PARAMETERS, node);
        Parameter[] parameters = parameters(node);
        if (parameters == null) parameters = Parameter.EMPTY_ARRAY;
        node = node.getNextSibling();

        ClassNode[] exceptions=new ClassNode[0];
        if (isType(LITERAL_throws, node)) {
        	AST throwsNode = node.getFirstChild();
        	List exceptionList = new ArrayList();
        	throwsList(throwsNode, exceptionList);
        	exceptions = (ClassNode[]) exceptionList.toArray(exceptions);
        	node = node.getNextSibling();
        }
        
        assertNodeType(SLIST, node);
        Statement code = statementList(node);

        ConstructorNode constructorNode = classNode.addConstructor(modifiers, parameters, exceptions, code);
        constructorNode.addAnnotations(annotations);
        configureAST(constructorNode, constructorDef);
    }

    protected void fieldDef(AST fieldDef) {
        List annotations = new ArrayList();
        AST node = fieldDef.getFirstChild();

        int modifiers = 0;
        if (isType(MODIFIERS, node)) {
            modifiers = modifiers(node, annotations, modifiers);
            node = node.getNextSibling();
        }
        
        if (classNode.isInterface()) {
        	modifiers |= Opcodes.ACC_STATIC | Opcodes.ACC_FINAL;
        	if ( (modifiers & (Opcodes.ACC_PRIVATE | Opcodes.ACC_PROTECTED)) == 0) {
        		modifiers |= Opcodes.ACC_PUBLIC;
        	}
        }

        ClassNode type = null;
        if (isType(TYPE, node)) {
            type = makeType(node);
            node = node.getNextSibling();
        }

        String name = identifier(node);
        node = node.getNextSibling();

        Expression initialValue = null;
        if (node != null) {
            assertNodeType(ASSIGN, node);
            initialValue = expression(node);
        }

        if (initialValue == null && type != null) {
            if (type==ClassHelper.int_TYPE) {
                initialValue = new ConstantExpression(new Integer(0));
            }
            else if (type==ClassHelper.long_TYPE) {
                initialValue = new ConstantExpression(new Long(0L));
            }
            else if (type==ClassHelper.double_TYPE) {
                initialValue = new ConstantExpression(new Double(0.0));
            }
            else if (type==ClassHelper.float_TYPE) {
                initialValue = new ConstantExpression(new Float(0.0F));
            }
            else if (type==ClassHelper.boolean_TYPE) {
                initialValue = ConstantExpression.FALSE;
            }
            else if (type==ClassHelper.short_TYPE) {
                initialValue = new ConstantExpression(new Short((short) 0));
            }
            else if (type==ClassHelper.byte_TYPE) {
                initialValue = new ConstantExpression(new Byte((byte) 0));
            }
            else if (type==ClassHelper.char_TYPE) {
                initialValue = new ConstantExpression(new Character((char) 0));
            }
        }


        FieldNode fieldNode = new FieldNode(name, modifiers, type, classNode, initialValue);
        fieldNode.addAnnotations(annotations);
        configureAST(fieldNode, fieldDef);

        if (!hasVisibility(modifiers)) {
            // lets set the modifiers on the field
            int fieldModifiers = 0;
            int flags = Opcodes.ACC_STATIC | Opcodes.ACC_TRANSIENT | Opcodes.ACC_VOLATILE | Opcodes.ACC_FINAL;

            if (!hasVisibility(modifiers)) {
                modifiers |= Opcodes.ACC_PUBLIC;
                fieldModifiers |= Opcodes.ACC_PRIVATE;
            }

            // lets pass along any other modifiers we need
            fieldModifiers |= (modifiers & flags);
            fieldNode.setModifiers(fieldModifiers);
            
            PropertyNode propertyNode = new PropertyNode(fieldNode, modifiers, null, null);
            configureAST(propertyNode, fieldDef);
            classNode.addProperty(propertyNode);
        }
        else {
            fieldNode.setModifiers(modifiers);
            classNode.addField(fieldNode);
        }
    }

    protected ClassNode[] interfaces(AST node) {
        List interfaceList = new ArrayList();
        for (AST implementNode = node.getFirstChild(); implementNode != null; implementNode = implementNode.getNextSibling()) {
        	interfaceList.add(ClassHelper.make(qualifiedName(implementNode)));
        }
        ClassNode[] interfaces = {};
        if (!interfaceList.isEmpty()) {
            interfaces = new ClassNode[interfaceList.size()];
            interfaceList.toArray(interfaces);

        }
        return interfaces;
    }

    protected Parameter[] parameters(AST parametersNode) {
        AST node = parametersNode.getFirstChild();
        if (node == null) {
        	if (isType(IMPLICIT_PARAMETERS, parametersNode)) return Parameter.EMPTY_ARRAY;
            return null;
        }
        else {
            List parameters = new ArrayList();
            do {
                parameters.add(parameter(node));
                node = node.getNextSibling();
            }
            while (node != null);
            Parameter[] answer = new Parameter[parameters.size()];
            parameters.toArray(answer);
            return answer;
        }
    }

    protected Parameter parameter(AST paramNode) {
        List annotations = new ArrayList();
        AST node = paramNode.getFirstChild();

        int modifiers = 0;
        if (isType(MODIFIERS, node)) {
            modifiers = modifiers(node, annotations, modifiers);
            node = node.getNextSibling();
        }

        ClassNode type = ClassHelper.DYNAMIC_TYPE;
        if (isType(TYPE, node)) {
            type = makeType(node);
            node = node.getNextSibling();
        }

        String name = identifier(node);
        node = node.getNextSibling();
        VariableExpression leftExpression = new VariableExpression(name, type);
        configureAST(leftExpression, paramNode);

        Parameter parameter = null;
        if (node != null) {
            assertNodeType(ASSIGN, node);
            Expression rightExpression = expression(node.getFirstChild());
            parameter = new Parameter(type, name, rightExpression);
        }
        else
            parameter = new Parameter(type, name);

        // TODO
        //configureAST(parameter,paramNode);
        //parameter.addAnnotations(annotations);
        return parameter;
    }

    protected int modifiers(AST modifierNode, List annotations, int defaultModifiers) {
        assertNodeType(MODIFIERS, modifierNode);

        boolean access = false;
        int answer = 0;

        for (AST node = modifierNode.getFirstChild(); node != null; node = node.getNextSibling()) {
            int type = node.getType();
            switch (type) {
                // annotations
                case ANNOTATION:
                    annotations.add(annotation(node));
                    break;


                    // core access scope modifiers
                case LITERAL_private:
                    answer = setModifierBit(node, answer, Opcodes.ACC_PRIVATE);
                    access = setAccessTrue(node, access);
                    break;

                case LITERAL_protected:
                    answer = setModifierBit(node, answer, Opcodes.ACC_PROTECTED);
                    access = setAccessTrue(node, access);
                    break;

                case LITERAL_public:
                    answer = setModifierBit(node, answer, Opcodes.ACC_PUBLIC);
                    access = setAccessTrue(node, access);
                    break;

                    // other modifiers
                case ABSTRACT:
                    answer = setModifierBit(node, answer, Opcodes.ACC_ABSTRACT);
                    break;

                case FINAL:
                    answer = setModifierBit(node, answer, Opcodes.ACC_FINAL);
                    break;

                case LITERAL_native:
                    answer = setModifierBit(node, answer, Opcodes.ACC_NATIVE);
                    break;

                case LITERAL_static:
                    answer = setModifierBit(node, answer, Opcodes.ACC_STATIC);
                    break;

                case STRICTFP:
                    answer = setModifierBit(node, answer, Opcodes.ACC_STRICT);
                    break;

                case LITERAL_synchronized:
                    answer = setModifierBit(node, answer, Opcodes.ACC_SYNCHRONIZED);
                    break;

                case LITERAL_transient:
                    answer = setModifierBit(node, answer, Opcodes.ACC_TRANSIENT);
                    break;

                case LITERAL_volatile:
                    answer = setModifierBit(node, answer, Opcodes.ACC_VOLATILE);
                    break;

                default:
                    unknownAST(node);
            }
        }
        if (!access) {
            answer |= defaultModifiers;
        }
        return answer;