com.alibaba.fastjson.parser.DefaultJSONParser Java Examples

@SuppressWarnings({ "unchecked", "rawtypes" })
public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
    ParameterizedType paramType = (ParameterizedType) type;
    Type itemType = paramType.getActualTypeArguments()[0];

    Object itemObject = parser.parseObject(itemType);

    Type rawType = paramType.getRawType();
    if (rawType == AtomicReference.class) {
        return (T) new AtomicReference(itemObject);
    }

    if (rawType == WeakReference.class) {
        return (T) new WeakReference(itemObject);
    }

    if (rawType == SoftReference.class) {
        return (T) new SoftReference(itemObject);
    }

    throw new UnsupportedOperationException(rawType.toString());
}
 

/**
 * wzy扩展
 *
 * @param input
 * @param value
 * @param config
 * @param processor
 * @param featureValues
 * @param features
 */
private static void reflectObject(String input, Object value, ParserConfig config, ParseProcess processor,
		int featureValues, Feature... features) {
	if (input == null) {
		return;
	}
	for (Feature featrue : features) {
		featureValues = Feature.config(featureValues, featrue, true);
	}

	DefaultJSONParser parser = new DefaultJSONParser(input, config, featureValues);

	if (processor instanceof ExtraTypeProvider) {
		parser.getExtraTypeProviders().add((ExtraTypeProvider) processor);
	}

	if (processor instanceof ExtraProcessor) {
		parser.getExtraProcessors().add((ExtraProcessor) processor);
	}
	parser.parseObject(value);
	parser.handleResovleTask(value);
	parser.close();
}
 

private void _createInstance(ClassWriter cw, Context context) {
    Constructor<?> defaultConstructor = context.beanInfo.defaultConstructor;
    if (!Modifier.isPublic(defaultConstructor.getModifiers())) {
        return;
    }
    
    MethodVisitor mw = new MethodWriter(cw, ACC_PUBLIC, "createInstance",
                                        "(L" + DefaultJSONParser + ";Ljava/lang/reflect/Type;)Ljava/lang/Object;",
                                        null, null);

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

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

@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
    Object value = DateCodec.instance.deserialze(parser, type, fieldName);

    if (value instanceof Calendar) {
        return (T) value;
    }

    Date date = (Date) value;
    if (date == null) {
        return null;
    }

    JSONLexer lexer = parser.lexer;
    Calendar calendar = Calendar.getInstance(lexer.getTimeZone(), lexer.getLocale());
    calendar.setTime(date);

    if (type == XMLGregorianCalendar.class) {
        return (T) createXMLGregorianCalendar((GregorianCalendar) calendar);
    }

    return (T) calendar;
}
 

public static void main(String[] args) {
	TestFastJson entity=new TestFastJson();
	JSONObject json=new JSONObject();
	JSONArray list=new JSONArray();
	list.add(1);
	json.put("1", 1);
	json.put("list",list);
	entity.setJson(json);
	String jsonStr=JSON.toJSONString(entity);
	System.out.println(jsonStr);
	entity=JSONObject.parseObject(jsonStr,TestFastJson.class);
	System.out.println(entity);
	//反序列化
	DefaultJSONParser jp=new DefaultJSONParser(jsonStr);
	JSONObject json2=jp.parseObject();
	System.out.println("id："+json2.getIntValue("id"));
	//类型反序列化
	Type type=new TypeReference<TestFastJson>() {
	}.getType();
	TestFastJson entity2=JSON.parseObject(jsonStr, type);
	System.out.println(entity2.getId());
}
 

private void _getFieldDeser(Context context, MethodVisitor mw, FieldInfo fieldInfo) {
    Label notNull_ = new Label();
    mw.visitVarInsn(ALOAD, 0);
    mw.visitFieldInsn(GETFIELD, context.className, fieldInfo.name + "_asm_deser__", desc(ObjectDeserializer.class));
    mw.visitJumpInsn(IFNONNULL, notNull_);

    mw.visitVarInsn(ALOAD, 0);

    mw.visitVarInsn(ALOAD, 1);
    mw.visitMethodInsn(INVOKEVIRTUAL, DefaultJSONParser, "getConfig", "()" + desc(ParserConfig.class));
    mw.visitLdcInsn(com.alibaba.fastjson.asm.Type.getType(desc(fieldInfo.fieldClass)));
    mw.visitMethodInsn(INVOKEVIRTUAL, type(ParserConfig.class), "getDeserializer",
                       "(Ljava/lang/reflect/Type;)" + desc(ObjectDeserializer.class));

    mw.visitFieldInsn(PUTFIELD, context.className, fieldInfo.name + "_asm_deser__", desc(ObjectDeserializer.class));

    mw.visitLabel(notNull_);

    mw.visitVarInsn(ALOAD, 0);
    mw.visitFieldInsn(GETFIELD, context.className, fieldInfo.name + "_asm_deser__", desc(ObjectDeserializer.class));
}
 

public void extract(JSONPath path, DefaultJSONParser parser, Context context) {
    if (context.eval) {
        Object object = parser.parse();
        if (object instanceof List) {
            int[] indexes = new int[this.indexes.length];
            System.arraycopy(this.indexes, 0, indexes, 0, indexes.length);
            boolean noneNegative = indexes[0] >= 0;

            List list = (List) object;
            if (noneNegative) {
                for (int i = list.size() - 1; i >= 0; i--) {
                    if (Arrays.binarySearch(indexes, i) < 0) {
                        list.remove(i);
                    }
                }
                context.object = list;
                return;
            }
        }
    }
    throw new UnsupportedOperationException();
}
 

@SuppressWarnings("unchecked")
public static <T> T deserialze(DefaultJSONParser parser) {
    final JSONLexer lexer = parser.lexer;
    if (lexer.token() == JSONToken.LITERAL_INT) {
        BigDecimal decimalValue = lexer.decimalValue();
        lexer.nextToken(JSONToken.COMMA);
        return (T) decimalValue;
    }

    if (lexer.token() == JSONToken.LITERAL_FLOAT) {
        BigDecimal val = lexer.decimalValue();
        lexer.nextToken(JSONToken.COMMA);
        return (T) val;
    }

    Object value = parser.parse();
    return value == null //
        ? null //
        : (T) TypeUtils.castToBigDecimal(value);
}
 

@SuppressWarnings({ "unchecked", "rawtypes" })
public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
    if (parser.lexer.token() == JSONToken.NULL) {
        parser.lexer.nextToken(JSONToken.COMMA);
        return null;
    }
    
    if (type == JSONArray.class) {
        JSONArray array = new JSONArray();
        parser.parseArray(array);
        return (T) array;
    }

    Collection list = TypeUtils.createCollection(type);

    Type itemType = TypeUtils.getCollectionItemType(type);
    parser.parseArray(itemType, list, fieldName);

    return (T) list;
}
 

private void _getCollectionFieldItemDeser(Context context, MethodVisitor mw, FieldInfo fieldInfo,
                                          Class<?> itemType) {
    Label notNull_ = new Label();
    mw.visitVarInsn(ALOAD, 0);
    mw.visitFieldInsn(GETFIELD, context.className, fieldInfo.name + "_asm_list_item_deser__",
                      desc(ObjectDeserializer.class));
    mw.visitJumpInsn(IFNONNULL, notNull_);

    mw.visitVarInsn(ALOAD, 0);

    mw.visitVarInsn(ALOAD, 1);
    mw.visitMethodInsn(INVOKEVIRTUAL, DefaultJSONParser, "getConfig", "()" + desc(ParserConfig.class));
    mw.visitLdcInsn(com.alibaba.fastjson.asm.Type.getType(desc(itemType)));
    mw.visitMethodInsn(INVOKEVIRTUAL, type(ParserConfig.class), "getDeserializer",
                       "(Ljava/lang/reflect/Type;)" + desc(ObjectDeserializer.class));

    mw.visitFieldInsn(PUTFIELD, context.className, fieldInfo.name + "_asm_list_item_deser__",
                      desc(ObjectDeserializer.class));

    mw.visitLabel(notNull_);
    mw.visitVarInsn(ALOAD, 0);
    mw.visitFieldInsn(GETFIELD, context.className, fieldInfo.name + "_asm_list_item_deser__",
                      desc(ObjectDeserializer.class));
}
 

private void _createInstance(Context context, MethodVisitor mw) {
    JavaBeanInfo beanInfo = context.beanInfo;
    Constructor<?> defaultConstructor = beanInfo.defaultConstructor;
    if (Modifier.isPublic(defaultConstructor.getModifiers())) {
        mw.visitTypeInsn(NEW, type(context.getInstClass()));
        mw.visitInsn(DUP);

        mw.visitMethodInsn(INVOKESPECIAL, type(defaultConstructor.getDeclaringClass()), "<init>", "()V");

        mw.visitVarInsn(ASTORE, context.var("instance"));
    } else {
        mw.visitVarInsn(ALOAD, 0);
        mw.visitVarInsn(ALOAD, 1);
        mw.visitVarInsn(ALOAD, 0);
        mw.visitFieldInsn(GETFIELD, type(JavaBeanDeserializer.class), "clazz", "Ljava/lang/Class;");
        mw.visitMethodInsn(INVOKESPECIAL, type(JavaBeanDeserializer.class), "createInstance",
                           "(L" + DefaultJSONParser + ";Ljava/lang/reflect/Type;)Ljava/lang/Object;");
        mw.visitTypeInsn(CHECKCAST, type(context.getInstClass())); // cast
        mw.visitVarInsn(ASTORE, context.var("instance"));
    }
}
 

@SuppressWarnings({ "unchecked"})
    public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {

    	if (parser.getLexer().token() == JSONToken.NULL) {
            parser.getLexer().nextToken(JSONToken.COMMA);
            return null;
        }
        String input = parser.getInput();
//        final String inputValue = input.replaceAll("\\{.+list:\\[(.++)\\]\\}", "$1");
//        ReflectionUtil.setField(ReflectionUtil.findField(parser.getClass(), "input"), parser,inputValue );
        Page<T> list = null;
        if (null==parser.getInput()||"null".equals(input)) {
			return null;
		}
        JSONObject jo = parser.parseObject();
        JSONArray ja = jo.getJSONArray("list");
        if (ja!=null) {
            List<T> vList = (List<T>) ja;
			list = new Page<>();
			list.addAll(vList);
	        list.setTotal(jo.getIntValue("total"));
		}

        return (T) list;
    }
 

@SuppressWarnings("unchecked")
public static <T> T parseObject(String input, Type clazz, int featureValues, Feature... features) {
    if (input == null) {
        return null;
    }

    for (Feature feature : features) {
        featureValues = Feature.config(featureValues, feature, true);
    }

    DefaultJSONParser parser = new DefaultJSONParser(input, ParserConfig.getGlobalInstance(), featureValues);
    T value = (T) parser.parseObject(clazz);

    parser.handleResovleTask(value);

    parser.close();

    return (T) value;
}
 

@SuppressWarnings("unchecked")
public static <T> T parseObject(char[] input, int length, Type clazz, Feature... features) {
    if (input == null || input.length == 0) {
        return null;
    }

    int featureValues = DEFAULT_PARSER_FEATURE;
    for (Feature feature : features) {
        featureValues = Feature.config(featureValues, feature, true);
    }

    DefaultJSONParser parser = new DefaultJSONParser(input, length, ParserConfig.getGlobalInstance(), featureValues);
    T value = (T) parser.parseObject(clazz);

    parser.handleResovleTask(value);

    parser.close();

    return (T) value;
}
 

public static JSONArray parseArray(String text) {
    if (text == null) {
        return null;
    }

    DefaultJSONParser parser = new DefaultJSONParser(text, ParserConfig.getGlobalInstance());

    JSONArray array;

    JSONLexer lexer = parser.lexer;
    if (lexer.token() == JSONToken.NULL) {
        lexer.nextToken();
        array = null;
    } else if (lexer.token() == JSONToken.EOF) {
        array = null;
    } else {
        array = new JSONArray();
        parser.parseArray(array);

        parser.handleResovleTask(array);
    }

    parser.close();

    return array;
}
 

@SuppressWarnings("rawtypes")
@Override
public void parseField(DefaultJSONParser parser, Object object, Type objectType, Map<String, Object> fieldValues) {
    JSONLexer lexer = parser.lexer;
    final int token = lexer.token();
    if (token == JSONToken.NULL
            || (token == JSONToken.LITERAL_STRING && lexer.stringVal().length() == 0)) {
        setValue(object, null);
        return;
    }

    ArrayList list = new ArrayList();

    ParseContext context = parser.getContext();

    parser.setContext(context, object, fieldInfo.name);
    parseArray(parser, objectType, list);
    parser.setContext(context);

    if (object == null) {
        fieldValues.put(fieldInfo.name, list);
    } else {
        setValue(object, list);
    }
}
 

public static List<Object> parseArray(String text, Type[] types) {
    if (text == null) {
        return null;
    }

    List<Object> list;

    DefaultJSONParser parser = new DefaultJSONParser(text, ParserConfig.getGlobalInstance());
    Object[] objectArray = parser.parseArray(types);
    if (objectArray == null) {
        list = null;
    } else {
        list = Arrays.asList(objectArray);
    }

    parser.handleResovleTask(list);

    parser.close();

    return list;
}
 

/**
 * @since 1.2.51
 * @param json
 * @param path
 * @return
 */
public static Object extract(String json, String path, ParserConfig config, int features, Feature... optionFeatures) {
    features |= Feature.OrderedField.mask;
    DefaultJSONParser parser = new DefaultJSONParser(json, config, features);
    JSONPath jsonPath = compile(path);
    Object result = jsonPath.extract(parser);
    parser.lexer.close();
    return result;
}
 

private void _setContext(Context context, MethodVisitor mw) {
    mw.visitVarInsn(ALOAD, 1); // parser
    mw.visitVarInsn(ALOAD, context.var("context"));
    mw.visitMethodInsn(INVOKEVIRTUAL, DefaultJSONParser, "setContext", "(" + desc(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.visitFieldInsn(PUTFIELD, type(ParseContext.class), "object", "Ljava/lang/Object;");

    mw.visitLabel(endIf_);
}
 

protected Object parseRest(DefaultJSONParser parser
        , Type type
        , Object fieldName
        , Object instance
        , int features
        , int[] setFlags) {
    Object value = deserialze(parser, type, fieldName, instance, features, setFlags);

    return value;
}
 

@Override
public <T> T deserialze(DefaultJSONParser defaultJSONParser, Type type, Object o) {
    JSONObject object = JSONObject.parseObject(defaultJSONParser.getInput());
    if (null != o && o.equals("releaseDate")) {
        return (T) DateUtil.parse(object.get(o));
    }
    return (T) object.get(o);
}
 

@SuppressWarnings("unchecked")
public static <T> T deserialze(DefaultJSONParser parser) {
    final JSONLexer lexer = parser.lexer;
    if (lexer.token() == JSONToken.LITERAL_INT) {
        String val = lexer.numberString();
        lexer.nextToken(JSONToken.COMMA);
        return (T) new BigInteger(val);
    }

    Object value = parser.parse();
    return value == null //
        ? null //
        : (T) TypeUtils.castToBigInteger(value);
}
 

@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
    final JSONLexer lexer = parser.lexer;

    Long longObject;
    try {
        final int token = lexer.token();
        if (token == JSONToken.LITERAL_INT) {
            long longValue = lexer.longValue();
            lexer.nextToken(JSONToken.COMMA);
            longObject = Long.valueOf(longValue);
        } else if (token == JSONToken.LITERAL_FLOAT) {
            BigDecimal number = lexer.decimalValue();
            longObject = TypeUtils.longValue(number);
            lexer.nextToken(JSONToken.COMMA);
        } else {
            if (token == JSONToken.LBRACE) {
                JSONObject jsonObject = new JSONObject(true);
                parser.parseObject(jsonObject);
                longObject = TypeUtils.castToLong(jsonObject);
            } else {
                Object value = parser.parse();

                longObject = TypeUtils.castToLong(value);
            }
            if (longObject == null) {
                return null;
            }
        }
    } catch (Exception ex) {
        throw new JSONException("parseLong error, field : " + fieldName, ex);
    }
    
    return clazz == AtomicLong.class //
        ? (T) new AtomicLong(longObject.longValue()) //
        : (T) longObject;
}
 

@SuppressWarnings("unchecked")

    public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
        JSONLexer lexer = parser.lexer;

        if (lexer.token() == JSONToken.NULL) {
            lexer.nextToken(JSONToken.COMMA);
            return null;
        }

        if (lexer.token() != JSONToken.LBRACE && lexer.token() != JSONToken.COMMA) {
            throw new JSONException("syntax error");
        }
        lexer.nextToken();

        T obj;
        if (type == Point.class) {
            obj = (T) parsePoint(parser, fieldName);
        } else if (type == Rectangle.class) {
            obj = (T) parseRectangle(parser);
        } else if (type == Color.class) {
            obj = (T) parseColor(parser);
        } else if (type == Font.class) {
            obj = (T) parseFont(parser);
        } else {
            throw new JSONException("not support awt class : " + type);
        }

        ParseContext context = parser.getContext();
        parser.setContext(obj, fieldName);
        parser.setContext(context);

        return obj;
    }
 

private Object parseRef(DefaultJSONParser parser, Object fieldName) {
    JSONLexer lexer = parser.getLexer();
    lexer.nextTokenWithColon(JSONToken.LITERAL_STRING);
    String ref = lexer.stringVal();
    parser.setContext(parser.getContext(), fieldName);
    parser.addResolveTask(new DefaultJSONParser.ResolveTask(parser.getContext(), ref));
    parser.popContext();
    parser.setResolveStatus(DefaultJSONParser.NeedToResolve);
    lexer.nextToken(JSONToken.RBRACE);
    parser.accept(JSONToken.RBRACE);
    return null;
}
 

@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type clazz, Object fieldName) {
    Object value = parser.parse();
    return value == null //
        ? null //
        : (T) TypeUtils.castToChar(value);
}
 

/**
 *
 * @since 1.2.38
 */
public static Object parse(String text, ParserConfig config, int features) {
    if (text == null) {
        return null;
    }

    DefaultJSONParser parser = new DefaultJSONParser(text, config, features);
    Object value = parser.parse();

    parser.handleResovleTask(value);

    parser.close();

    return value;
}
 

@SuppressWarnings("unchecked")
public static <T> T parseObject(String input, Type clazz, ParserConfig config, ParseProcess processor,
                                      int featureValues, Feature... features) {
    if (input == null) {
        return null;
    }

    if (features != null) {
        for (Feature feature : features) {
            featureValues |= feature.mask;
        }
    }

    DefaultJSONParser parser = new DefaultJSONParser(input, config, featureValues);

    if (processor != null) {
        if (processor instanceof ExtraTypeProvider) {
            parser.getExtraTypeProviders().add((ExtraTypeProvider) processor);
        }

        if (processor instanceof ExtraProcessor) {
            parser.getExtraProcessors().add((ExtraProcessor) processor);
        }

        if (processor instanceof FieldTypeResolver) {
            parser.setFieldTypeResolver((FieldTypeResolver) processor);
        }
    }

    T value = (T) parser.parseObject(clazz, null);

    parser.handleResovleTask(value);

    parser.close();

    return (T) value;
}
 

@SuppressWarnings("unchecked")
public <T> T deserialze(DefaultJSONParser parser, Type type, Object fieldName) {
    JSONLexer lexer = parser.getLexer();
    if (lexer.token() == JSONToken.LITERAL_STRING) {
        String text = lexer.stringVal();
        lexer.nextToken(JSONToken.COMMA);
        return (T) resolver.resolve(text);
    } else {
        throw new UnsupportedOperationException();
    }
}
 

public void extract(JSONPath path, DefaultJSONParser parser, Context context) {
    JSONLexerBase lexer = (JSONLexerBase) parser.lexer;
    if (lexer.seekArrayToItem(index)
            && context.eval)
    {
        context.object = parser.parse();
    }
}