Examples of com.alibaba.fastjson.asm.Label

com.alibaba.fastjson.asm.Label
A label represents a position in the bytecode of a method. Labels are used for jump, goto, and switch instructions, and for try catch blocks. A label designates the instruction that is just after. Note however that there can be other elements between a label and the instruction it designates (such as other labels, stack map frames, line numbers, etc.). @author Eric Bruneton


        mw.visitLabel(_end);
    }


    private void _decimal(Class<?> clazz, MethodVisitor mw, FieldInfo property, Context context) {
        Label _end = new Label();


        _nameApply(mw, property, context, _end);
        _get(mw, context, property);
        mw.visitVarInsn(ASTORE, context.var("decimal"));


        _filters(mw, property, context, _end);


        Label _if = new Label();
        Label _else = new Label();
        Label _end_if = new Label();


        mw.visitLabel(_if);


        // if (decimalValue == null) {
        mw.visitVarInsn(ALOAD, context.var("decimal"));

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        mw.visitLabel(_end);
    }


    private void _string(Class<?> clazz, MethodVisitor mw, FieldInfo property, Context context) {
        Label _end = new Label();


        _nameApply(mw, property, context, _end);
        _get(mw, context, property);
        mw.visitVarInsn(ASTORE, context.var("string"));


        _filters(mw, property, context, _end);


        Label _else = new Label();
        Label _end_if = new Label();


        // if (value == null) {
        mw.visitVarInsn(ALOAD, context.var("string"));
        mw.visitJumpInsn(IFNONNULL, _else);

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        Class<?> elementClass = null;
        if (elementType instanceof Class<?>) {
            elementClass = (Class<?>) elementType;
        }


        Label _end = new Label();


        Label _if = new Label();
        Label _else = new Label();
        Label _end_if = new Label();


        mw.visitLabel(_if);


        _nameApply(mw, property, context, _end);
        _get(mw, context, property);
        mw.visitTypeInsn(CHECKCAST, getType(List.class)); // cast
        mw.visitVarInsn(ASTORE, context.var("list"));


        _filters(mw, property, context, _end);


        mw.visitVarInsn(ALOAD, context.var("list"));
        mw.visitJumpInsn(IFNONNULL, _else);
        _if_write_null(mw, property, context);
        mw.visitJumpInsn(GOTO, _end_if);


        mw.visitLabel(_else); // else {


        mw.visitVarInsn(ALOAD, context.var("out"));
        mw.visitVarInsn(ILOAD, context.var("seperator"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(SerializeWriter.class), "write", "(C)V");


        mw.visitVarInsn(ALOAD, context.var("out"));
        mw.visitVarInsn(ALOAD, context.fieldName());
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(SerializeWriter.class), "writeFieldName", "(Ljava/lang/String;)V");


        //
        mw.visitVarInsn(ALOAD, context.var("list"));
        mw.visitMethodInsn(INVOKEINTERFACE, getType(List.class), "size", "()I");
        mw.visitVarInsn(ISTORE, context.var("int"));


        Label _if_3 = new Label();
        Label _else_3 = new Label();
        Label _end_if_3 = new Label();


        mw.visitLabel(_if_3);


        mw.visitVarInsn(ILOAD, context.var("int"));
        mw.visitInsn(ICONST_0);
        mw.visitJumpInsn(IF_ICMPNE, _else_3);


        mw.visitVarInsn(ALOAD, context.var("out"));
        mw.visitLdcInsn("[]");
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(SerializeWriter.class), "write", "(Ljava/lang/String;)V");


        mw.visitJumpInsn(GOTO, _end_if_3);


        mw.visitLabel(_else_3);


        {
            mw.visitVarInsn(ALOAD, context.serializer());
            mw.visitVarInsn(ALOAD, context.var("list"));
            mw.visitVarInsn(ALOAD, context.fieldName());
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONSerializer.class), "setContext",
                               "(Ljava/lang/Object;Ljava/lang/Object;)V");
        }


        {
            mw.visitVarInsn(ALOAD, context.var("out"));
            mw.visitVarInsn(BIPUSH, '[');
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(SerializeWriter.class), "write", "(C)V");


            // list_serializer = null
            mw.visitInsn(ACONST_NULL);
            mw.visitTypeInsn(CHECKCAST, getType(ObjectSerializer.class)); // cast to string
            mw.visitVarInsn(ASTORE, context.var("list_ser"));


            Label _for = new Label();
            Label _end_for = new Label();


            mw.visitInsn(ICONST_0);
            mw.visitVarInsn(ISTORE, context.var("i"));


            // for (; i < list.size() -1; ++i) {

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        _apply(mw, property, context);
        mw.visitJumpInsn(IFEQ, _end);


        _processKey(mw, property, context);


        Label _else_processKey = new Label();
        _processValue(mw, property, context);


        mw.visitVarInsn(ALOAD, context.original());
        mw.visitVarInsn(ALOAD, context.processValue());
        mw.visitJumpInsn(IF_ACMPEQ, _else_processKey);

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            if (format.trim().length() == 0) {
                format = null;
            }
        }


        Label _not_null = new Label();


        mw.visitVarInsn(ALOAD, context.processValue());
        mw.visitJumpInsn(IFNONNULL, _not_null); // if (obj == null)
        _if_write_null(mw, fieldInfo, context);
        mw.visitJumpInsn(GOTO, _end);

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    }


    private void _if_write_null(MethodVisitor mw, FieldInfo fieldInfo, Context context) {
        Class<?> propertyClass = fieldInfo.getFieldClass();


        Label _if = new Label();
        Label _else = new Label();
        Label _write_null = new Label();
        Label _end_if = new Label();


        mw.visitLabel(_if);


        // out.isEnabled(Serializer.WriteMapNullValue)
        boolean writeNull = false;

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        MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "deserialze", "(" + getDesc(DefaultJSONParser.class)
                                                                    + getDesc(Type.class)
                                                                    + "Ljava/lang/Object;)Ljava/lang/Object;", null,
                                          null);


        Label reset_ = new Label();
        Label super_ = new Label();
        Label return_ = new Label();
        Label end_ = new Label();


        mw.visitVarInsn(ALOAD, 1);
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getLexer", "()" + getDesc(JSONLexer.class));
        mw.visitVarInsn(ASTORE, context.var("lexer"));


        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitFieldInsn(GETSTATIC, getType(Feature.class), "SortFeidFastMatch", "L" + getType(Feature.class) + ";");
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "isEnabled", "(" + "L" + getType(Feature.class)
                                                                                 + ";" + ")Z");
        mw.visitJumpInsn(IFEQ, super_);


        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitLdcInsn(context.getClazz().getName());
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanType", "(Ljava/lang/String;)I");


        mw.visitFieldInsn(GETSTATIC, getType(JSONLexer.class), "NOT_MATCH", "I");
        mw.visitJumpInsn(IF_ICMPEQ, super_);


        mw.visitVarInsn(ALOAD, 1); // parser
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getContext",
                           "()Lcom/alibaba/fastjson/parser/ParseContext;");
        mw.visitVarInsn(ASTORE, context.var("mark_context"));


        // ParseContext context = parser.getContext();
        mw.visitInsn(ICONST_0);
        mw.visitVarInsn(ISTORE, context.var("matchedCount"));


        Constructor<?> defaultConstructor = context.getBeanInfo().getDefaultConstructor();


        // create instance
        if (Modifier.isPublic(defaultConstructor.getModifiers())) {
            mw.visitTypeInsn(NEW, getType(context.getClazz()));
            mw.visitInsn(DUP);
            mw.visitMethodInsn(INVOKESPECIAL, getType(context.getClazz()), "<init>", "()V");


            mw.visitVarInsn(ASTORE, context.var("instance"));
        } else {
            mw.visitVarInsn(ALOAD, 0);
            mw.visitVarInsn(ALOAD, 1);
            mw.visitMethodInsn(INVOKESPECIAL, getType(ASMJavaBeanDeserializer.class), "createInstance",
                               "(" + getDesc(DefaultJSONParser.class) + ")Ljava/lang/Object;");
            mw.visitTypeInsn(CHECKCAST, getType(context.getClazz())); // cast
            mw.visitVarInsn(ASTORE, context.var("instance"));
        }


        {
            mw.visitVarInsn(ALOAD, 1); // parser
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getContext",
                               "()" + ASMUtils.getDesc(ParseContext.class));
            mw.visitVarInsn(ASTORE, context.var("context"));


            mw.visitVarInsn(ALOAD, 1); // parser
            mw.visitVarInsn(ALOAD, context.var("context"));
            mw.visitVarInsn(ALOAD, context.var("instance"));
            mw.visitVarInsn(ALOAD, 3); // fieldName
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "setContext",
                               "(" + ASMUtils.getDesc(ParseContext.class) + "Ljava/lang/Object;Ljava/lang/Object;)"
                                       + ASMUtils.getDesc(ParseContext.class));
            mw.visitVarInsn(ASTORE, context.var("childContext"));
        }


        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitFieldInsn(GETFIELD, getType(JSONLexer.class), "matchStat", "I");
        mw.visitFieldInsn(GETSTATIC, getType(JSONLexer.class), "END", "I");
        mw.visitJumpInsn(IF_ICMPEQ, return_);


        mw.visitInsn(ICONST_0); // UNKOWN
        mw.visitIntInsn(ISTORE, context.var("matchStat"));


        int fieldListSize = context.getFieldInfoList().size();
        for (int i = 0; i < fieldListSize; i += 32) {
            mw.visitInsn(ICONST_0);
            mw.visitVarInsn(ISTORE, context.var("_asm_flag_" + (i / 32)));
        }


        // declare and init
        for (int i = 0; i < fieldListSize; ++i) {
            FieldInfo fieldInfo = context.getFieldInfoList().get(i);
            Class<?> fieldClass = fieldInfo.getFieldClass();


            if (fieldClass == boolean.class //
                || fieldClass == byte.class //
                || fieldClass == short.class //
                || fieldClass == int.class) {
                mw.visitInsn(ICONST_0);
                mw.visitVarInsn(ISTORE, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == long.class) {
                mw.visitInsn(LCONST_0);
                mw.visitVarInsn(LSTORE, context.var(fieldInfo.getName() + "_asm", 2));
            } else if (fieldClass == float.class) {
                mw.visitInsn(FCONST_0);
                mw.visitVarInsn(FSTORE, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == double.class) {
                mw.visitInsn(DCONST_0);
                mw.visitVarInsn(DSTORE, context.var(fieldInfo.getName() + "_asm", 2));
            } else {
                if (fieldClass == String.class) {
                    Label flagEnd_ = new Label();
                    mw.visitVarInsn(ALOAD, context.var("lexer"));
                    mw.visitFieldInsn(GETSTATIC, getType(Feature.class), "InitStringFieldAsEmpty",
                                      "L" + getType(Feature.class) + ";");
                    mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "isEnabled", "(" + "L"
                                                                                             + getType(Feature.class)
                                                                                             + ";" + ")Z");
                    mw.visitJumpInsn(IFEQ, flagEnd_);
                    _setFlag(mw, context, i);
                    mw.visitLabel(flagEnd_);


                    mw.visitVarInsn(ALOAD, context.var("lexer"));
                    mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "stringDefaultValue",
                                       "()Ljava/lang/String;");
                } else {
                    mw.visitInsn(ACONST_NULL);
                }


                mw.visitTypeInsn(CHECKCAST, getType(fieldClass)); // cast
                mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));
            }
        }


        for (int i = 0; i < fieldListSize; ++i) {
            FieldInfo fieldInfo = context.getFieldInfoList().get(i);
            Class<?> fieldClass = fieldInfo.getFieldClass();
            Type fieldType = fieldInfo.getFieldType();


            Label notMatch_ = new Label();


            if (fieldClass == boolean.class) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldBoolean", "([C)Z");
                mw.visitVarInsn(ISTORE, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == byte.class) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldInt", "([C)I");
                mw.visitVarInsn(ISTORE, context.var(fieldInfo.getName() + "_asm"));


            } else if (fieldClass == short.class) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldInt", "([C)I");
                mw.visitVarInsn(ISTORE, context.var(fieldInfo.getName() + "_asm"));


            } else if (fieldClass == int.class) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldInt", "([C)I");
                mw.visitVarInsn(ISTORE, context.var(fieldInfo.getName() + "_asm"));


            } else if (fieldClass == long.class) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldLong", "([C)J");
                mw.visitVarInsn(LSTORE, context.var(fieldInfo.getName() + "_asm", 2));


            } else if (fieldClass == float.class) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldFloat", "([C)F");
                mw.visitVarInsn(FSTORE, context.var(fieldInfo.getName() + "_asm"));


            } else if (fieldClass == double.class) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldDouble", "([C)D");
                mw.visitVarInsn(DSTORE, context.var(fieldInfo.getName() + "_asm", 2));


            } else if (fieldClass == String.class) {
                Label notEnd_ = new Label();


                mw.visitIntInsn(ILOAD, context.var("matchStat"));
                mw.visitInsn(ICONST_4); // END
                mw.visitJumpInsn(IF_ICMPNE, notEnd_);


                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "stringDefaultValue",
                                   "()Ljava/lang/String;");
                mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));
                mw.visitJumpInsn(GOTO, notMatch_);


                mw.visitLabel(notEnd_);


                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldString", "([C)Ljava/lang/String;");
                mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));


            } else if (fieldClass.isEnum()) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
                Label enumNull_ = new Label();
                mw.visitInsn(ACONST_NULL);
                mw.visitTypeInsn(CHECKCAST, getType(fieldClass)); // cast
                mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));


                mw.visitVarInsn(ALOAD, 1);
                mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getSymbolTable",
                                   "()" + getDesc(SymbolTable.class));


                mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldSymbol",
                                   "([C" + getDesc(SymbolTable.class) + ")Ljava/lang/String;");
                mw.visitInsn(DUP);
                mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm_enumName"));


                mw.visitJumpInsn(IFNULL, enumNull_);
                mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm_enumName"));
                mw.visitMethodInsn(INVOKESTATIC, getType(fieldClass), "valueOf", "(Ljava/lang/String;)"
                                                                                 + getDesc(fieldClass));
                mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));
                mw.visitLabel(enumNull_);


            } else if (Collection.class.isAssignableFrom(fieldClass)) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitVarInsn(ALOAD, 0);
                mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");


                Type actualTypeArgument = ((ParameterizedType) fieldType).getActualTypeArguments()[0];


                if (actualTypeArgument instanceof Class) {
                    Class<?> itemClass = (Class<?>) actualTypeArgument;


                    if (!Modifier.isPublic(itemClass.getModifiers())) {
                        throw new ASMException("can not create ASMParser");
                    }


                    if (itemClass == String.class) {
                        mw.visitLdcInsn(com.alibaba.fastjson.asm.Type.getType(getDesc(fieldClass))); // cast
                        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONLexer.class), "scanFieldStringArray",
                                           "([CLjava/lang/Class;)" + getDesc(Collection.class));
                        mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));
                    } else {
                        _deserialze_list_obj(context, mw, reset_, fieldInfo, fieldClass, itemClass, i);


                        if (i == fieldListSize - 1) {
                            _deserialize_endCheck(context, mw, reset_);
                        }
                        continue;
                    }
                } else {
                    throw new ASMException("can not create ASMParser");
                }


            } else {
                _deserialze_obj(context, mw, reset_, fieldInfo, fieldClass, i);


                if (i == fieldListSize - 1) {
                    _deserialize_endCheck(context, mw, reset_);
                }


                continue;
            }


            mw.visitVarInsn(ALOAD, context.var("lexer"));
            mw.visitFieldInsn(GETFIELD, getType(JSONLexer.class), "matchStat", "I");
            Label flag_ = new Label();
            // mw.visitInsn(DUP);
            mw.visitJumpInsn(IFLE, flag_);
            _setFlag(mw, context, i);
            mw.visitLabel(flag_);

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        for (int i = 0, size = context.getFieldInfoList().size(); i < size; ++i) {
            FieldInfo fieldInfo = context.getFieldInfoList().get(i);
            Class<?> fieldClass = fieldInfo.getFieldClass();
            Type fieldType = fieldInfo.getFieldType();


            Label notSet_ = new Label();
            _isFlag(mw, context, i, notSet_);


            if (fieldClass == boolean.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));

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        mw.visitVarInsn(ALOAD, 1); // parser
        mw.visitVarInsn(ALOAD, context.var("context"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "setContext",
                           "(" + ASMUtils.getDesc(ParseContext.class) + ")V");


        Label endIf_ = new Label();
        mw.visitVarInsn(ALOAD, context.var("childContext"));
        mw.visitJumpInsn(IFNULL, endIf_);


        mw.visitVarInsn(ALOAD, context.var("childContext"));
        mw.visitVarInsn(ALOAD, context.var("instance"));

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        mw.visitLabel(endIf_);
    }


    private void _deserialize_endCheck(Context context, MethodVisitor mw, Label reset_) {
        Label _end_if = new Label();
        // Label nextToken_ = new Label();


        // mw.visitFieldInsn(GETSTATIC, getType(System.class), "out", "Ljava/io/PrintStream;");
        // mw.visitIntInsn(ILOAD, context.var("matchedCount"));
        // mw.visitMethodInsn(INVOKEVIRTUAL, getType(java.io.PrintStream.class), "println", "(I)V");

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Related Classes of com.alibaba.fastjson.asm.Label

com.alibaba.fastjson.parser.deserializer.ASMDeserializerFactory

com.alibaba.fastjson.serializer.ASMSerializerFactory

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