| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package generalizer |
| |
| import ( |
| "encoding/json" |
| "reflect" |
| "sync" |
| ) |
| |
| import ( |
| hessian "github.com/apache/dubbo-go-hessian2" |
| perrors "github.com/pkg/errors" |
| ) |
| |
| import ( |
| "dubbo.apache.org/dubbo-go/v3/common/logger" |
| "dubbo.apache.org/dubbo-go/v3/protocol/dubbo/hessian2" |
| ) |
| |
| var ( |
| jsonGeneralizer Generalizer |
| jsonGeneralizerOnce sync.Once |
| ) |
| |
| func GetGsonGeneralizer() Generalizer { |
| jsonGeneralizerOnce.Do(func() { |
| jsonGeneralizer = &GsonGeneralizer{} |
| }) |
| return jsonGeneralizer |
| } |
| |
| type GsonGeneralizer struct{} |
| |
| func (GsonGeneralizer) Generalize(obj interface{}) (interface{}, error) { |
| newObj, ok := obj.(hessian.POJO) |
| if !ok { |
| return nil, perrors.Errorf("unexpected type of obj(=%T), wanted is hessian pojo", obj) |
| } |
| |
| jsonbytes, err := json.Marshal(newObj) |
| if err != nil { |
| return nil, err |
| } |
| |
| return string(jsonbytes), nil |
| } |
| |
| func (GsonGeneralizer) Realize(obj interface{}, typ reflect.Type) (interface{}, error) { |
| jsonbytes, ok := obj.(string) |
| if !ok { |
| return nil, perrors.Errorf("unexpected type of obj(=%T), wanted is string", obj) |
| } |
| |
| // create the target object |
| ret, ok := reflect.New(typ).Interface().(hessian.POJO) |
| if !ok { |
| return nil, perrors.Errorf("the type of obj(=%s) should be hessian pojo", typ) |
| } |
| |
| err := json.Unmarshal([]byte(jsonbytes), ret) |
| if err != nil { |
| return nil, err |
| } |
| |
| return ret, nil |
| } |
| |
| func (GsonGeneralizer) GetType(obj interface{}) (typ string, err error) { |
| typ, err = hessian2.GetJavaName(obj) |
| // no error or error is not NilError |
| if err == nil || err != hessian2.NilError { |
| return |
| } |
| |
| typ = "java.lang.Object" |
| if err == hessian2.NilError { |
| logger.Debugf("the type of nil object couldn't be inferred, use the default value(\"%s\")", typ) |
| return |
| } |
| |
| logger.Debugf("the type of object(=%T) couldn't be recognized as a POJO, use the default value(\"%s\")", obj, typ) |
| return |
| } |