dubbo.apache.org/dubbo-go/v3@v3.1.1/filter/generic/util.go (about)

     1  /*
     2   * Licensed to the Apache Software Foundation (ASF) under one or more
     3   * contributor license agreements.  See the NOTICE file distributed with
     4   * this work for additional information regarding copyright ownership.
     5   * The ASF licenses this file to You under the Apache License, Version 2.0
     6   * (the "License"); you may not use this file except in compliance with
     7   * the License.  You may obtain a copy of the License at
     8   *
     9   *     http://www.apache.org/licenses/LICENSE-2.0
    10   *
    11   * Unless required by applicable law or agreed to in writing, software
    12   * distributed under the License is distributed on an "AS IS" BASIS,
    13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    14   * See the License for the specific language governing permissions and
    15   * limitations under the License.
    16   */
    17  
    18  package generic
    19  
    20  import (
    21  	"strings"
    22  )
    23  
    24  import (
    25  	"github.com/dubbogo/gost/log/logger"
    26  )
    27  
    28  import (
    29  	"dubbo.apache.org/dubbo-go/v3/common/constant"
    30  	"dubbo.apache.org/dubbo-go/v3/filter/generic/generalizer"
    31  	"dubbo.apache.org/dubbo-go/v3/protocol"
    32  )
    33  
    34  // isCallingToGenericService check if it calls to a generic service
    35  func isCallingToGenericService(invoker protocol.Invoker, invocation protocol.Invocation) bool {
    36  	return isGeneric(invoker.GetURL().GetParam(constant.GenericKey, "")) &&
    37  		invocation.MethodName() != constant.Generic &&
    38  		invocation.MethodName() != constant.GenericAsync
    39  }
    40  
    41  // isMakingAGenericCall check if it is making a generic call to a generic service
    42  func isMakingAGenericCall(invoker protocol.Invoker, invocation protocol.Invocation) bool {
    43  	return isGeneric(invoker.GetURL().GetParam(constant.GenericKey, "")) &&
    44  		(invocation.MethodName() == constant.Generic ||
    45  			invocation.MethodName() == constant.GenericAsync) &&
    46  		invocation.Arguments() != nil &&
    47  		len(invocation.Arguments()) == 3
    48  }
    49  
    50  // isGeneric receives a generic field from url of invoker to determine whether the service is generic or not
    51  func isGeneric(generic string) bool {
    52  	lowerGeneric := strings.ToLower(generic)
    53  	return lowerGeneric == constant.GenericSerializationDefault
    54  }
    55  
    56  // toUnexport is to lower the first letter
    57  func toUnexport(a string) string {
    58  	return strings.ToLower(a[:1]) + a[1:]
    59  }
    60  
    61  // toExport is to upper the first letter
    62  func toExport(a string) string {
    63  	return strings.ToUpper(a[:1]) + a[1:]
    64  }
    65  
    66  func getGeneralizer(generic string) (g generalizer.Generalizer) {
    67  	switch strings.ToLower(generic) {
    68  	case constant.GenericSerializationDefault:
    69  		g = generalizer.GetMapGeneralizer()
    70  	case constant.GenericSerializationGson:
    71  		g = generalizer.GetGsonGeneralizer()
    72  
    73  	default:
    74  		logger.Debugf("\"%s\" is not supported, use the default generalizer(MapGeneralizer)", generic)
    75  		g = generalizer.GetMapGeneralizer()
    76  	}
    77  	return
    78  }