Usage Example

This section provides a complete example of using KACC_JSON interfaces.

1. Create a test.cpp file.

   vi test.cpp

2. Press i to enter the insert mode and add the following content to the file:

   #include <iostream>
   
   #include "com_google_gson_JsonElement.h"
   #include "com_google_gson_JsonParser.h"
   #include "com_google_gson_Gson.h"
   #include "com_google_gson_GsonObject.h"
   
   int main()
   {
       std::string json_str = R"(
           {
               "intValue": 42,
               "longValue": 1726819335,
               "shortValue": 996,
               "doubleValue": 3.14,
               "floatValue": 0.00159,
               "stringValue": "Hello, World!",
               "stringValueFromInt64": 1726819335,
               "arrayValue": [1, 2, 3],
               "boolValue": true,
               "objectValue": {
                   "nestedInt": 100,
                   "nestedString": "Nested"
               },
               "arrayObject": [
                 {"name": "hua", "age": 18},
                 {"name": "wei", "age": 20}
               ]
           }
       )";
   
       String tmpStr(json_str);
       JsonElement *newElement = JsonParser::parseString(&tmpStr);
       GsonObject *gsonObject = newElement->getAsJsonObject();
   
       int intValue = gsonObject->get("intValue")->getAsInt();
       double doubleValue = gsonObject->get("doubleValue")->getAsDouble();
       String *stringValue = gsonObject->get("stringValue")->getAsString();
   
       std::cout << "intValue: " << intValue << std::endl;
       std::cout << "doubleValue: " << doubleValue << std::endl;
       std::cout << "stringValue: " << stringValue->ref() << std::endl;
   
       std::string serializeResult = gsonObject->toString();
       std::cout << "toString: " << serializeResult << std::endl;
       return 0;
   }

3. Press Esc, type :wq!, and press Enter to save the file and exit.
4. Compile the test.cpp file and specify the name of the output executable file as testDemo.

   g++ -o testDemo test.cpp -I./include/kacc_gson_shell -I./include/ -I./util/OmniStream_Java_Basictypes/include/ -I/usr/local/ksl/include  -L./output -lkaccgson -L./util/OmniStream_Java_Basictypes/lib/ -lJavaBasictypes -lJavaFunctions -L/usr/local/ksl/lib -lKHSEL_ops

   

   OmniStream_Java_Basictypes contains header files and library files related to the Java basic libraries of OmniStream. /usr/local/ksl contains header files and library files related to KSL.

5. Run the testDemo executable file.

   ./testDemo 

   The command output is as follows:

   intValue: 42
   doubleValue: 3.14
   stringValue: Hello, World!
   toString: {"intValue":42,"longValue":1726819335,"shortValue":996,"doubleValue":3.14,"floatValue":0.00159,"stringValue":"Hello, World!","stringValueFromInt64":1726819335,"arrayValue":[1,2,3],"boolValue":true,"objectValue":{"nestedInt":100,"nestedString":"Nested"},"arrayObject":[{"name":"hua","age":18},{"name":"wei","age":20}]}