ASMDeserializerFactory.java

package com.alibaba.fastjson.parser.deserializer;

import static com.alibaba.fastjson.util.ASMUtils.getDesc;
import static com.alibaba.fastjson.util.ASMUtils.getType;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.TreeSet;
import java.util.concurrent.atomic.AtomicLong;

import com.alibaba.fastjson.JSONException;
import com.alibaba.fastjson.asm.ASMException;
import com.alibaba.fastjson.parser.DefaultJSONParser;
import com.alibaba.fastjson.parser.DefaultJSONParser.ResolveTask;
import com.alibaba.fastjson.parser.Feature;
import com.alibaba.fastjson.parser.JSONLexer;
import com.alibaba.fastjson.parser.JSONScanner;
import com.alibaba.fastjson.parser.JSONToken;
import com.alibaba.fastjson.parser.ParseContext;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.parser.SymbolTable;
import com.alibaba.fastjson.parser.deserializer.ASMJavaBeanDeserializer.InnerJavaBeanDeserializer;
import com.alibaba.fastjson.util.ASMClassLoader;
import com.alibaba.fastjson.util.ASMUtils;
import com.alibaba.fastjson.util.DeserializeBeanInfo;
import com.alibaba.fastjson.util.FieldInfo;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

public class ASMDeserializerFactory implements Opcodes {

    private static final ASMDeserializerFactory instance = new ASMDeserializerFactory();
    private ASMClassLoader classLoader = new ASMClassLoader();
    private final AtomicLong seed = new AtomicLong();

    public String getGenClassName(Class<?> clazz) {
        return "Fastjson_ASM_" + clazz.getSimpleName() + "_" + seed.incrementAndGet();
    }

    public String getGenFieldDeserializer(Class<?> clazz, FieldInfo fieldInfo) {
        String name = "Fastjson_ASM__Field_" + clazz.getSimpleName();
        name += "_" + fieldInfo.getName() + "_" + seed.incrementAndGet();

        return name;
    }

    public ASMDeserializerFactory() {
    }

    public final static ASMDeserializerFactory getInstance() {
        return instance;
    }

    public boolean isExternalClass(Class<?> clazz) {
        return classLoader.isExternalClass(clazz);
    }

    public ObjectDeserializer createJavaBeanDeserializer(ParserConfig config, Class<?> clazz, Type type)
            throws Exception {
        if (clazz.isPrimitive()) {
            throw new IllegalArgumentException("not support type :" + clazz.getName());
        }

        String className = getGenClassName(clazz);

        ClassWriter cw = new ClassWriter(0);
        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, className, null,
                org.objectweb.asm.Type.getInternalName(
                ASMJavaBeanDeserializer.class), null);

        DeserializeBeanInfo beanInfo = DeserializeBeanInfo.computeSetters(clazz, type);

        _init(cw, new Context(className, config, beanInfo, 3));
        _createInstance(cw, new Context(className, config, beanInfo, 3));
        _deserialze(cw, new Context(className, config, beanInfo, 4));

        byte[] code = cw.toByteArray();

//         org.apache.commons.io.IOUtils.write(code, new java.io.FileOutputStream(
//         "/usr/alibaba/workspace-3.7/fastjson-asm/target/classes/"
//         + className + ".class"));

        Class<?> exampleClass = classLoader.defineClassPublic(className, code, 0, code.length);

        Constructor<?> constructor = exampleClass.getConstructor(ParserConfig.class, Class.class);
        Object instance = constructor.newInstance(config, clazz);

        return (ObjectDeserializer) instance;
    }

    void _setFlag(MethodVisitor mw, Context context, int i) {
        String varName = "_asm_flag_" + (i / 32);

        mw.visitVarInsn(ILOAD, context.var(varName));
        mw.visitLdcInsn(1 << i);
        mw.visitInsn(IOR);
        mw.visitVarInsn(ISTORE, context.var(varName));
    }

    void _isFlag(MethodVisitor mw, Context context, int i, Label label) {
        mw.visitVarInsn(ILOAD, context.var("_asm_flag_" + (i / 32)));
        mw.visitLdcInsn(1 << i);
        mw.visitInsn(IAND);

        mw.visitJumpInsn(IFEQ, label);
    }

    void _deserialze(ClassWriter cw, Context context) {
        if (context.getFieldInfoList().isEmpty()) {
            return;
        }

        for (FieldInfo fieldInfo : context.getFieldInfoList()) {
            Class<?> fieldClass = fieldInfo.getFieldClass();
            Type fieldType = fieldInfo.getFieldType();

            if (fieldClass == char.class) {
                return;
            }

            if (Collection.class.isAssignableFrom(fieldClass)) {
                if (fieldType instanceof ParameterizedType) {
                    Type itemType = ((ParameterizedType) fieldType).getActualTypeArguments()[0];
                    if (itemType instanceof Class) {
                        continue;
                    } else {
                        return;
                    }
                } else {
                    return;
                }
            }
        }

        Collections.sort(context.getFieldInfoList());

        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.visitTypeInsn(CHECKCAST, getType(JSONScanner.class)); // cast
        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(JSONScanner.class), "isEnabled", "(" + "L" + getType(Feature.class)
                + ";" + ")Z");
        mw.visitJumpInsn(IFEQ, super_);

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitFieldInsn(GETFIELD, getType(JSONScanner.class), "resetCount", "I");
        mw.visitJumpInsn(IFGT, super_);

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

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

        // matchType

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "getBufferPosition", "()I");
        mw.visitVarInsn(ISTORE, context.var("mark"));

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "getCurrent", "()C");
        mw.visitVarInsn(ISTORE, context.var("mark_ch"));

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "token", "()I");
        mw.visitVarInsn(ISTORE, context.var("mark_token"));

        mw.visitVarInsn(ALOAD, 1); // parser
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getContextLength", "()I");
        mw.visitVarInsn(ISTORE, context.var("contextLength"));

        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 (context.getClazz().isInterface()) {
            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"));
        } else {
            if (defaultConstructor != null) {
                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"));
                }
            } else {
                mw.visitInsn(ACONST_NULL);
                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(JSONScanner.class), "matchStat", "I");
        mw.visitFieldInsn(GETSTATIC, getType(JSONScanner.class), "END", "I");
        mw.visitJumpInsn(IF_ICMPEQ, return_);

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

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

        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 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(JSONScanner.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(JSONScanner.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(JSONScanner.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(JSONScanner.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(JSONScanner.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(JSONScanner.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(JSONScanner.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(JSONScanner.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(JSONScanner.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(JSONScanner.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(org.objectweb.asm.Type.getType(fieldClass)); // cast
                        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "scanFieldStringArray",
                                "([CLjava/lang/Class;)" + getDesc(Collection.class));
                        mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));

                        _setFlag(mw, context, i);
                    } else {
                        _deserialze_list_obj(context, mw, reset_, fieldInfo, fieldClass, itemClass, i);

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

                continue;
            }

            mw.visitVarInsn(ALOAD, context.var("lexer"));
            mw.visitFieldInsn(GETFIELD, getType(JSONScanner.class), "matchStat", "I");
            mw.visitInsn(DUP);
            mw.visitVarInsn(ISTORE, context.var("matchStat"));
            mw.visitFieldInsn(GETSTATIC, getType(JSONScanner.class), "NOT_MATCH", "I");
            mw.visitJumpInsn(IF_ICMPEQ, reset_);

            // mw.visitFieldInsn(GETSTATIC, getType(System.class), "out", "Ljava/io/PrintStream;");
            // mw.visitVarInsn(ALOAD, context.var("lexer"));
            // mw.visitFieldInsn(GETFIELD, getType(JSONScanner.class), "matchStat", "I");
            // mw.visitMethodInsn(INVOKEVIRTUAL, getType(java.io.PrintStream.class), "println", "(I)V");

            mw.visitVarInsn(ALOAD, context.var("lexer"));
            mw.visitFieldInsn(GETFIELD, getType(JSONScanner.class), "matchStat", "I");
            mw.visitJumpInsn(IFLE, notMatch_);

            // increment matchedCount
            mw.visitVarInsn(ILOAD, context.var("matchedCount"));
            mw.visitInsn(ICONST_1);
            mw.visitInsn(IADD);
            mw.visitVarInsn(ISTORE, context.var("matchedCount"));

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

            mw.visitLabel(notMatch_);

            if (i == size - 1) {
                mw.visitVarInsn(ALOAD, context.var("lexer"));
                mw.visitFieldInsn(GETFIELD, getType(JSONScanner.class), "matchStat", "I");
                mw.visitFieldInsn(GETSTATIC, getType(JSONScanner.class), "END", "I");
                mw.visitJumpInsn(IF_ICMPNE, reset_);
            }
        }

        mw.visitLabel(end_);

        if (!context.getClazz().isInterface() && !Modifier.isAbstract(context.getClazz().getModifiers())) {
            if (defaultConstructor != null) {
                _batchSet(context, mw);
            } else {
                Constructor<?> creatorConstructor = context.getBeanInfo().getCreatorConstructor();
                if (creatorConstructor != null) {
                    mw.visitTypeInsn(NEW, getType(context.getClazz()));
                    mw.visitInsn(DUP);

                    _loadCreatorParameters(context, mw);

                    mw.visitMethodInsn(INVOKESPECIAL, getType(context.getClazz()), "<init>",
                            getDesc(creatorConstructor));
                    mw.visitVarInsn(ASTORE, context.var("instance"));
                } else {
                    Method factoryMethod = context.getBeanInfo().getFactoryMethod();
                    if (factoryMethod != null) {
                        _loadCreatorParameters(context, mw);
                        mw.visitMethodInsn(INVOKESTATIC, getType(factoryMethod.getDeclaringClass()),
                                factoryMethod.getName(), getDesc(factoryMethod));
                        mw.visitVarInsn(ASTORE, context.var("instance"));
                    } else {
                        throw new JSONException("TODO");
                    }
                }
            }
        }

        mw.visitLabel(return_);

        _setContext(context, mw);
        mw.visitVarInsn(ALOAD, context.var("instance"));
        mw.visitInsn(ARETURN);

        mw.visitLabel(reset_);

        // void reset(int mark, char mark_ch)
        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitVarInsn(ILOAD, context.var("mark"));
        mw.visitVarInsn(ILOAD, context.var("mark_ch"));
        mw.visitVarInsn(ILOAD, context.var("mark_token"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "reset", "(ICI)V");

        mw.visitVarInsn(ALOAD, 1); // parser
        mw.visitVarInsn(ALOAD, context.var("mark_context"));
        mw.visitVarInsn(ILOAD, context.var("contextLength"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "clearContext", "(Lcom/alibaba/fastjson/parser/ParseContext;I)V");
//        _setContext(context, mw, false);

        mw.visitLabel(super_);
        mw.visitVarInsn(ALOAD, 0);
        mw.visitVarInsn(ALOAD, 1);
        mw.visitVarInsn(ALOAD, 2);
        mw.visitVarInsn(ALOAD, 3);
        mw.visitMethodInsn(INVOKESPECIAL, getType(ASMJavaBeanDeserializer.class), "deserialze",
                "(" + getDesc(DefaultJSONParser.class) + getDesc(Type.class)
                + "Ljava/lang/Object;)Ljava/lang/Object;");
        mw.visitInsn(ARETURN);

        int maxStack = 4;
        Constructor<?> creatorConstructor = context.getBeanInfo().getCreatorConstructor();
        if (creatorConstructor != null) {
            int constructorTypeStack = 2;
            for (Class<?> type : creatorConstructor.getParameterTypes()) {
                if (type == long.class || type == double.class) {
                    constructorTypeStack += 2;
                } else {
                    constructorTypeStack++;
                }
            }
            if (maxStack < constructorTypeStack) {
                maxStack = constructorTypeStack;
            }
        } else {
            Method factoryMethod = context.getBeanInfo().getFactoryMethod();
            if (factoryMethod != null) {
                int paramStacks = 2;
                for (Class<?> type : factoryMethod.getParameterTypes()) {
                    if (type == long.class || type == double.class) {
                        paramStacks += 2;
                    } else {
                        paramStacks++;
                    }
                }
                if (maxStack < paramStacks) {
                    maxStack = paramStacks;
                }
            }
        }

        mw.visitMaxs(maxStack, context.getVariantCount());
        mw.visitEnd();
    }

    private void _loadCreatorParameters(Context context, MethodVisitor mw) {
        List<FieldInfo> fieldInfoList = context.getBeanInfo().getFieldList();

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

            if (fieldClass == boolean.class) {
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == byte.class) {
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == short.class) {
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == int.class) {
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == long.class) {
                mw.visitVarInsn(LLOAD, context.var(fieldInfo.getName() + "_asm", 2));
            } else if (fieldClass == float.class) {
                mw.visitVarInsn(FLOAD, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass == double.class) {
                mw.visitVarInsn(DLOAD, context.var(fieldInfo.getName() + "_asm", 2));
            } else if (fieldClass == String.class) {
                mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
            } else if (fieldClass.isEnum()) {
                mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
            } else if (Collection.class.isAssignableFrom(fieldClass)) {
                Type itemType = ((ParameterizedType) fieldType).getActualTypeArguments()[0];
                if (itemType == String.class) {
                    mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
                    mw.visitTypeInsn(CHECKCAST, getType(fieldClass)); // cast
                } else {
                    mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
                }
            } else {
                mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
            }
        }
    }

    private void _batchSet(Context context, MethodVisitor mw) {
        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();

            if (fieldClass == boolean.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (fieldClass == byte.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (fieldClass == short.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (fieldClass == int.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ILOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (fieldClass == long.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(LLOAD, context.var(fieldInfo.getName() + "_asm", 2));
                if (fieldInfo.getMethod() != null) {
                    mw.visitMethodInsn(INVOKEVIRTUAL, getType(context.getClazz()), fieldInfo.getMethod().getName(),
                            "(J)V");
                } else {
                    mw.visitFieldInsn(PUTFIELD, getType(fieldInfo.getDeclaringClass()), fieldInfo.getField().getName(),
                            getDesc(fieldInfo.getFieldClass()));
                }
                continue;
            } else if (fieldClass == float.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(FLOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (fieldClass == double.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(DLOAD, context.var(fieldInfo.getName() + "_asm", 2));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (fieldClass == String.class) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (fieldClass.isEnum()) {
                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);
            } else if (Collection.class.isAssignableFrom(fieldClass)) {
                Label notSet_ = new Label();

                _isFlag(mw, context, i, notSet_);

                mw.visitVarInsn(ALOAD, context.var("instance"));
                Type itemType = ((ParameterizedType) fieldType).getActualTypeArguments()[0];
                if (itemType == String.class) {
                    mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
                    mw.visitTypeInsn(CHECKCAST, getType(fieldClass)); // cast
                } else {
                    mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
                }
                _batchSetInvoke(context, mw, fieldInfo);
                mw.visitLabel(notSet_);
            } else {
                // mw.visitFieldInsn(GETSTATIC, getType(System.class), "out", "Ljava/io/PrintStream;");
                // mw.visitIntInsn(ILOAD, context.var(fieldInfo.getName() + "_asm_flag"));
                // mw.visitMethodInsn(INVOKEVIRTUAL, getType(java.io.PrintStream.class), "println", "(I)V");

                Label notSet_ = new Label();

                _isFlag(mw, context, i, notSet_);

                mw.visitVarInsn(ALOAD, context.var("instance"));
                mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
                _batchSetInvoke(context, mw, fieldInfo);

                mw.visitLabel(notSet_);
            }

        }
    }

    private void _batchSetInvoke(Context context, MethodVisitor mw, FieldInfo fieldInfo) {
        int INVAKE_TYPE;
        if (context.getClazz().isInterface()) {
            INVAKE_TYPE = INVOKEINTERFACE;
        } else {
            INVAKE_TYPE = INVOKEVIRTUAL;
        }
        if (fieldInfo.getMethod() != null) {
            mw.visitMethodInsn(INVAKE_TYPE, getType(fieldInfo.getDeclaringClass()), fieldInfo.getMethod().getName(),
                    getDesc(fieldInfo.getMethod()));

            if (!fieldInfo.getMethod().getReturnType().equals(Void.TYPE)) {
                mw.visitInsn(POP);
            }
        } else {
            mw.visitFieldInsn(PUTFIELD, getType(fieldInfo.getDeclaringClass()), fieldInfo.getField().getName(),
                    getDesc(fieldInfo.getFieldClass()));
        }
    }

    private void _setContext(Context context, MethodVisitor mw) {
        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"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(ParseContext.class), "setObject", "(Ljava/lang/Object;)V");

        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");

        mw.visitIntInsn(ILOAD, context.var("matchedCount"));
        mw.visitJumpInsn(IFLE, reset_);

//         mw.visitFieldInsn(GETSTATIC, getType(System.class), "out", "Ljava/io/PrintStream;");
//         mw.visitVarInsn(ALOAD, context.var("lexer"));
//         mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "token", "()I");
//         mw.visitMethodInsn(INVOKEVIRTUAL, getType(java.io.PrintStream.class), "println", "(I)V");

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "token", "()I");
        mw.visitFieldInsn(GETSTATIC, getType(JSONToken.class), "RBRACE", "I");
        mw.visitJumpInsn(IF_ICMPNE, reset_);

        // mw.visitLabel(nextToken_);
        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitFieldInsn(GETSTATIC, getType(JSONToken.class), "COMMA", "I");
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "nextToken", "(I)V");

        mw.visitLabel(_end_if);
    }

    private void _deserialze_list_obj(Context context, MethodVisitor mw, Label reset_, FieldInfo fieldInfo,
            Class<?> fieldClass, Class<?> itemType, int i) {
        Label matched_ = new Label();
        Label _end_if = new Label();

        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "matchField", "([C)Z");
        mw.visitJumpInsn(IFNE, matched_);
        mw.visitInsn(ACONST_NULL);
        mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));


        mw.visitJumpInsn(GOTO, _end_if);

        mw.visitLabel(matched_);
        _setFlag(mw, context, i);

        Label notNull_ = new Label();
        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_list_item_deser__",
                getDesc(ObjectDeserializer.class));
        mw.visitJumpInsn(IFNONNULL, notNull_);

        mw.visitVarInsn(ALOAD, 0);

        mw.visitVarInsn(ALOAD, 1);
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getConfig", "()"
                + getDesc(ParserConfig.class));
        mw.visitLdcInsn(org.objectweb.asm.Type.getType(itemType));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(ParserConfig.class), "getDeserializer",
                "(" + getDesc(Type.class) + ")" + getDesc(ObjectDeserializer.class));

        mw.visitFieldInsn(PUTFIELD, context.getClassName(), fieldInfo.getName() + "_asm_list_item_deser__",
                getDesc(ObjectDeserializer.class));

        mw.visitLabel(notNull_);

        // if (lexer.token() != JSONToken.LBRACKET) reset
        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "token", "()I");
        mw.visitFieldInsn(GETSTATIC, getType(JSONToken.class), "LBRACKET", "I");
        mw.visitJumpInsn(IF_ICMPNE, reset_);

        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_list_item_deser__",
                getDesc(ObjectDeserializer.class));
        mw.visitMethodInsn(INVOKEINTERFACE, getType(ObjectDeserializer.class), "getFastMatchToken", "()I");
        mw.visitVarInsn(ISTORE, context.var("fastMatchToken"));

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitVarInsn(ILOAD, context.var("fastMatchToken"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "nextToken", "(I)V");

        if (fieldClass.isAssignableFrom(ArrayList.class)) {
            mw.visitTypeInsn(NEW, getType(ArrayList.class));
            mw.visitInsn(DUP);
            mw.visitMethodInsn(INVOKESPECIAL, getType(ArrayList.class), "<init>", "()V");
        } else if (fieldClass.isAssignableFrom(LinkedList.class)) {
            mw.visitTypeInsn(NEW, getType(LinkedList.class));
            mw.visitInsn(DUP);
            mw.visitMethodInsn(INVOKESPECIAL, getType(LinkedList.class), "<init>", "()V");
        } else if (fieldClass.isAssignableFrom(HashSet.class)) {
            mw.visitTypeInsn(NEW, getType(HashSet.class));
            mw.visitInsn(DUP);
            mw.visitMethodInsn(INVOKESPECIAL, getType(HashSet.class), "<init>", "()V");
        } else if (fieldClass.isAssignableFrom(TreeSet.class)) {
            mw.visitTypeInsn(NEW, getType(TreeSet.class));
            mw.visitInsn(DUP);
            mw.visitMethodInsn(INVOKESPECIAL, getType(TreeSet.class), "<init>", "()V");
        } else {
            mw.visitTypeInsn(NEW, getType(fieldClass));
            mw.visitInsn(DUP);
            mw.visitMethodInsn(INVOKESPECIAL, getType(fieldClass), "<init>", "()V");
        }

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

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

            mw.visitVarInsn(ALOAD, 1); // parser
            mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
            mw.visitLdcInsn(fieldInfo.getName());
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "setContext",
                    "(Ljava/lang/Object;Ljava/lang/Object;)" + ASMUtils.getDesc(ParseContext.class));
            mw.visitInsn(POP);
        }

        Label loop_ = new Label();
        Label loop_end_ = new Label();

        // for (;;) {
        mw.visitInsn(ICONST_0);
        mw.visitVarInsn(ISTORE, context.var("i"));
        mw.visitLabel(loop_);

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "token", "()I");
        mw.visitFieldInsn(GETSTATIC, getType(JSONToken.class), "RBRACKET", "I");
        mw.visitJumpInsn(IF_ICMPEQ, loop_end_);

        // Object value = itemDeserializer.deserialze(parser, null);
        // array.add(value);

        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_list_item_deser__",
                getDesc(ObjectDeserializer.class));
        mw.visitVarInsn(ALOAD, 1);
        mw.visitInsn(ACONST_NULL);
        mw.visitVarInsn(ILOAD, context.var("i"));
        mw.visitMethodInsn(INVOKESTATIC, getType(Integer.class), "valueOf", "(I)Ljava/lang/Integer;");
        mw.visitMethodInsn(INVOKEINTERFACE, getType(ObjectDeserializer.class), "deserialze",
                "(" + ASMUtils.getDesc(DefaultJSONParser.class)
                + "Ljava/lang/reflect/Type;Ljava/lang/Object;)Ljava/lang/Object;");
        mw.visitVarInsn(ASTORE, context.var("list_item_value"));

        mw.visitIincInsn(context.var("i"), 1);

        mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
        mw.visitVarInsn(ALOAD, context.var("list_item_value"));
        if (fieldClass.isInterface()) {
            mw.visitMethodInsn(INVOKEINTERFACE, getType(fieldClass), "add", "(Ljava/lang/Object;)Z");
        } else {
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(fieldClass), "add", "(Ljava/lang/Object;)Z");
        }
        mw.visitInsn(POP);

        mw.visitVarInsn(ALOAD, 1);
        mw.visitVarInsn(ALOAD, context.var(fieldInfo.getName() + "_asm"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "checkListResolve",
                "(Ljava/util/Collection;)V");

        // if (lexer.token() == JSONToken.COMMA) {
        // lexer.nextToken(itemDeserializer.getFastMatchToken());
        // continue;
        // }
        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "token", "()I");
        mw.visitFieldInsn(GETSTATIC, getType(JSONToken.class), "COMMA", "I");
        mw.visitJumpInsn(IF_ICMPNE, loop_);

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitVarInsn(ILOAD, context.var("fastMatchToken"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "nextToken", "(I)V");
        mw.visitJumpInsn(GOTO, loop_);

        mw.visitLabel(loop_end_);

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

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "token", "()I");
        mw.visitFieldInsn(GETSTATIC, getType(JSONToken.class), "RBRACKET", "I");
        mw.visitJumpInsn(IF_ICMPNE, reset_);

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitFieldInsn(GETSTATIC, getType(JSONToken.class), "COMMA", "I");
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "nextToken", "(I)V");
        // lexer.nextToken(JSONToken.COMMA);

        mw.visitLabel(_end_if);
    }

    private void _deserialze_obj(Context context, MethodVisitor mw, Label reset_, FieldInfo fieldInfo,
            Class<?> fieldClass, int i) {
        Label matched_ = new Label();
        Label _end_if = new Label();

        mw.visitVarInsn(ALOAD, context.var("lexer"));
        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JSONScanner.class), "matchField", "([C)Z");
        mw.visitJumpInsn(IFNE, matched_);
        mw.visitInsn(ACONST_NULL);
        mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));

        mw.visitJumpInsn(GOTO, _end_if);

        mw.visitLabel(matched_);

        _setFlag(mw, context, i);

        // increment matchedCount
        mw.visitVarInsn(ILOAD, context.var("matchedCount"));
        mw.visitInsn(ICONST_1);
        mw.visitInsn(IADD);
        mw.visitVarInsn(ISTORE, context.var("matchedCount"));

        Label notNull_ = new Label();
        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_deser__",
                getDesc(ObjectDeserializer.class));
        mw.visitJumpInsn(IFNONNULL, notNull_);

        mw.visitVarInsn(ALOAD, 0);

        mw.visitVarInsn(ALOAD, 1);
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getConfig", "()"
                + getDesc(ParserConfig.class));
        mw.visitLdcInsn(org.objectweb.asm.Type.getType(fieldInfo.getFieldClass()));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(ParserConfig.class), "getDeserializer",
                "(" + getDesc(Type.class) + ")" + getDesc(ObjectDeserializer.class));

        mw.visitFieldInsn(PUTFIELD, context.getClassName(), fieldInfo.getName() + "_asm_deser__",
                getDesc(ObjectDeserializer.class));

        mw.visitLabel(notNull_);

        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, context.getClassName(), fieldInfo.getName() + "_asm_deser__",
                getDesc(ObjectDeserializer.class));
        mw.visitVarInsn(ALOAD, 1);
        if (fieldInfo.getFieldType() instanceof Class) {
            mw.visitLdcInsn(org.objectweb.asm.Type.getType(fieldInfo.getFieldClass()));
        } else {
            mw.visitVarInsn(ALOAD, 0);
            mw.visitLdcInsn(fieldInfo.getName());
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(ASMJavaBeanDeserializer.class), "getFieldType",
                    "(Ljava/lang/String;)Ljava/lang/reflect/Type;");
        }
        mw.visitLdcInsn(fieldInfo.getName());
        mw.visitMethodInsn(INVOKEINTERFACE, getType(ObjectDeserializer.class), "deserialze",
                "(" + getDesc(DefaultJSONParser.class) + getDesc(Type.class)
                + "Ljava/lang/Object;)Ljava/lang/Object;");
        mw.visitTypeInsn(CHECKCAST, getType(fieldClass)); // cast
        mw.visitVarInsn(ASTORE, context.var(fieldInfo.getName() + "_asm"));

        mw.visitVarInsn(ALOAD, 1);
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getResolveStatus", "()I");
        mw.visitFieldInsn(GETSTATIC, getType(DefaultJSONParser.class), "NeedToResolve", "I");
        mw.visitJumpInsn(IF_ICMPNE, _end_if);

        // ResolveTask task = parser.getLastResolveTask();
        // task.setFieldDeserializer(this);
        // task.setOwnerContext(parser.getContext());

        mw.visitVarInsn(ALOAD, 1);
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getLastResolveTask",
                "()" + getDesc(ResolveTask.class));
        mw.visitVarInsn(ASTORE, context.var("resolveTask"));

        mw.visitVarInsn(ALOAD, context.var("resolveTask"));
        mw.visitVarInsn(ALOAD, 1);
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "getContext", "()"
                + getDesc(ParseContext.class));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(ResolveTask.class), "setOwnerContext", "("
                + getDesc(ParseContext.class)
                + ")V");

        mw.visitVarInsn(ALOAD, context.var("resolveTask"));
        mw.visitVarInsn(ALOAD, 0);
        mw.visitLdcInsn(fieldInfo.getName());
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(ASMJavaBeanDeserializer.class), "getFieldDeserializer",
                "(Ljava/lang/String;)" + getDesc(FieldDeserializer.class));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(ResolveTask.class), "setFieldDeserializer",
                "(" + getDesc(FieldDeserializer.class) + ")V");

        mw.visitVarInsn(ALOAD, 1);
        mw.visitFieldInsn(GETSTATIC, getType(DefaultJSONParser.class), "NONE", "I");
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(DefaultJSONParser.class), "setResolveStatus", "(I)V");

        mw.visitLabel(_end_if);

    }

    public FieldDeserializer createFieldDeserializer(ParserConfig mapping, Class<?> clazz, FieldInfo fieldInfo)
            throws Exception {
        Class<?> fieldClass = fieldInfo.getFieldClass();

        if (fieldClass == int.class || fieldClass == long.class || fieldClass == String.class) {
            return createStringFieldDeserializer(mapping, clazz, fieldInfo);
        }

        FieldDeserializer fieldDeserializer = mapping.createFieldDeserializerWithoutASM(mapping, clazz, fieldInfo);
        return fieldDeserializer;
    }

    public FieldDeserializer createStringFieldDeserializer(ParserConfig mapping, Class<?> clazz, FieldInfo fieldInfo)
            throws Exception {
        Class<?> fieldClass = fieldInfo.getFieldClass();
        Method method = fieldInfo.getMethod();

        String className = getGenFieldDeserializer(clazz, fieldInfo);

        ClassWriter cw = new ClassWriter(0);
        Class<?> superClass;
        if (fieldClass == int.class) {
            superClass = IntegerFieldDeserializer.class;
        } else if (fieldClass == long.class) {
            superClass = LongFieldDeserializer.class;
        } else {
            superClass = StringFieldDeserializer.class;
        }

        int INVAKE_TYPE;
        if (clazz.isInterface()) {
            INVAKE_TYPE = INVOKEINTERFACE;
        } else {
            INVAKE_TYPE = INVOKEVIRTUAL;
        }

        cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, className, null, getType(superClass), null);

        {
            MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "<init>", "(" + getDesc(ParserConfig.class)
                    + getDesc(Class.class) + getDesc(FieldInfo.class)
                    + ")V", null, null);
            mw.visitVarInsn(ALOAD, 0);
            mw.visitVarInsn(ALOAD, 1);
            mw.visitVarInsn(ALOAD, 2);
            mw.visitVarInsn(ALOAD, 3);
            mw.visitMethodInsn(INVOKESPECIAL, getType(superClass), "<init>", "(" + getDesc(ParserConfig.class)
                    + getDesc(Class.class)
                    + getDesc(FieldInfo.class) + ")V");

            mw.visitInsn(RETURN);
            mw.visitMaxs(4, 6);
            mw.visitEnd();
        }

        if (method != null) {
            if (fieldClass == int.class) {
                MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "setValue", "(" + getDesc(Object.class) + "I)V", null,
                        null);
                mw.visitVarInsn(ALOAD, 1);
                mw.visitTypeInsn(CHECKCAST, getType(method.getDeclaringClass())); // cast
                mw.visitVarInsn(ILOAD, 2);
                mw.visitMethodInsn(INVAKE_TYPE, getType(method.getDeclaringClass()), method.getName(),
                        ASMUtils.getDesc(method));

                mw.visitInsn(RETURN);
                mw.visitMaxs(3, 3);
                mw.visitEnd();
            } else if (fieldClass == long.class) {
                MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "setValue", "(" + getDesc(Object.class) + "J)V", null,
                        null);
                mw.visitVarInsn(ALOAD, 1);
                mw.visitTypeInsn(CHECKCAST, getType(method.getDeclaringClass())); // cast
                mw.visitVarInsn(LLOAD, 2);
                mw.visitMethodInsn(INVAKE_TYPE, getType(method.getDeclaringClass()), method.getName(),
                        ASMUtils.getDesc(method));

                mw.visitInsn(RETURN);
                mw.visitMaxs(3, 4);
                mw.visitEnd();
            } else {
                // public void setValue(Object object, Object value)
                MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "setValue", "(" + getDesc(Object.class)
                        + getDesc(Object.class) + ")V", null, null);
                mw.visitVarInsn(ALOAD, 1);
                mw.visitTypeInsn(CHECKCAST, getType(method.getDeclaringClass())); // cast
                mw.visitVarInsn(ALOAD, 2);
                mw.visitTypeInsn(CHECKCAST, getType(fieldClass)); // cast
                mw.visitMethodInsn(INVAKE_TYPE, getType(method.getDeclaringClass()), method.getName(),
                        ASMUtils.getDesc(method));

                mw.visitInsn(RETURN);
                mw.visitMaxs(3, 3);
                mw.visitEnd();
            }
        }

        byte[] code = cw.toByteArray();

        Class<?> exampleClass = classLoader.defineClassPublic(className, code, 0, code.length);

        Constructor<?> constructor = exampleClass.getConstructor(ParserConfig.class, Class.class, FieldInfo.class);
        Object instance = constructor.newInstance(mapping, clazz, fieldInfo);

        return (FieldDeserializer) instance;
    }

    static class Context {

        private int variantIndex = 5;
        private Map<String, Integer> variants = new HashMap<String, Integer>();
        private Class<?> clazz;
        private final DeserializeBeanInfo beanInfo;
        private String className;
        private List<FieldInfo> fieldInfoList;

        public Context(String className, ParserConfig config, DeserializeBeanInfo beanInfo, int initVariantIndex) {
            this.className = className;
            this.clazz = beanInfo.getClazz();
            this.variantIndex = initVariantIndex;
            this.beanInfo = beanInfo;
            fieldInfoList = new ArrayList<FieldInfo>(beanInfo.getFieldList());
        }

        public String getClassName() {
            return className;
        }

        public List<FieldInfo> getFieldInfoList() {
            return fieldInfoList;
        }

        public DeserializeBeanInfo getBeanInfo() {
            return beanInfo;
        }

        public Class<?> getClazz() {
            return clazz;
        }

        public int getVariantCount() {
            return variantIndex;
        }

        public int var(String name, int increment) {
            Integer i = variants.get(name);
            if (i == null) {
                variants.put(name, variantIndex);
                variantIndex += increment;
            }
            i = variants.get(name);
            return i.intValue();
        }

        public int var(String name) {
            Integer i = variants.get(name);
            if (i == null) {
                variants.put(name, variantIndex++);
            }
            i = variants.get(name);
            return i.intValue();
        }

        public boolean contains(String name) {
            return variants.get(name) != null;
        }
    }

    private void _init(ClassWriter cw, Context context) {
        for (int i = 0, size = context.getFieldInfoList().size(); i < size; ++i) {
            FieldInfo fieldInfo = context.getFieldInfoList().get(i);

            // public FieldVisitor visitField(final int access, final String name, final String desc, final String
            // signature, final Object value) {
            FieldVisitor fw = cw.visitField(ACC_PUBLIC, fieldInfo.getName() + "_asm_prefix__", "[C", null, null);
            fw.visitEnd();
        }

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

            if (fieldClass.isPrimitive()) {
                continue;
            }

            if (fieldClass.isEnum()) {
            } else if (Collection.class.isAssignableFrom(fieldClass)) {
                FieldVisitor fw = cw.visitField(ACC_PUBLIC, fieldInfo.getName() + "_asm_list_item_deser__",
                        getDesc(ObjectDeserializer.class), null, null);
                fw.visitEnd();
            } else {
                FieldVisitor fw = cw.visitField(ACC_PUBLIC, fieldInfo.getName() + "_asm_deser__",
                        getDesc(ObjectDeserializer.class), null, null);
                fw.visitEnd();
            }
        }

        MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "<init>", "(" + getDesc(ParserConfig.class)
                + getDesc(Class.class) + ")V", null, null);
        mw.visitVarInsn(ALOAD, 0);
        mw.visitVarInsn(ALOAD, 1);
        mw.visitVarInsn(ALOAD, 2);
        mw.visitMethodInsn(INVOKESPECIAL, getType(ASMJavaBeanDeserializer.class), "<init>",
                "(" + getDesc(ParserConfig.class) + getDesc(Class.class) + ")V");

        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, getType(ASMJavaBeanDeserializer.class), "serializer",
                getDesc(InnerJavaBeanDeserializer.class));
        mw.visitMethodInsn(INVOKEVIRTUAL, getType(JavaBeanDeserializer.class), "getFieldDeserializerMap",
                "()" + getDesc(Map.class));
        mw.visitInsn(POP);

        // init fieldNamePrefix
        for (int i = 0, size = context.getFieldInfoList().size(); i < size; ++i) {
            FieldInfo fieldInfo = context.getFieldInfoList().get(i);

            mw.visitVarInsn(ALOAD, 0);
            mw.visitLdcInsn("\"" + fieldInfo.getName() + "\":"); // public char[] toCharArray()
            mw.visitMethodInsn(INVOKEVIRTUAL, getType(String.class), "toCharArray", "()" + getDesc(char[].class));
            mw.visitFieldInsn(PUTFIELD, context.getClassName(), fieldInfo.getName() + "_asm_prefix__", "[C");

        }

        mw.visitInsn(RETURN);
        mw.visitMaxs(4, 4);
        mw.visitEnd();
    }

    private void _createInstance(ClassWriter cw, Context context) {
        MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "createInstance", "(" + getDesc(DefaultJSONParser.class)
                + getDesc(Type.class) + ")Ljava/lang/Object;",
                null, null);

        mw.visitTypeInsn(NEW, getType(context.getClazz()));
        mw.visitInsn(DUP);
        mw.visitMethodInsn(INVOKESPECIAL, getType(context.getClazz()), "<init>", "()V");

        mw.visitInsn(ARETURN);
        mw.visitMaxs(3, 3);
        mw.visitEnd();
    }
}