(C) JSON: Nested Objects

Here we have a JSON object that contains nested JSON objects. This example demonstrates how to access the contents of the nested objects.

{
  "name": "donut",
  "image":
    {
    "fname": "donut.jpg",
    "w": 200,
    "h": 200
    },
  "thumbnail":
    {
    "fname": "donutThumb.jpg",
    "w": 32,
    "h": 32
    }
}

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#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    HCkJsonObject json;
    const char *jsonStr;
    BOOL success;
    HCkJsonObject imageObj;
    HCkJsonObject thumbObj;

    json = CkJsonObject_Create();

    // This is the above JSON with whitespace chars removed (SPACE, TAB, CR, and LF chars).
    // The presence of whitespace chars for pretty-printing makes no difference to the Load
    // method. 
    jsonStr = "{\"name\": \"donut\",\"image\":{\"fname\": \"donut.jpg\",\"w\": 200,\"h\": 200},\"thumbnail\":{\"fname\": \"donutThumb.jpg\",\"w\": 32,\"h\": 32}}";

    success = CkJsonObject_Load(json,jsonStr);
    if (success != TRUE) {
        printf("%s\n",CkJsonObject_lastErrorText(json));
        CkJsonObject_Dispose(json);
        return;
    }

    // Get the "image" object.
    imageObj = CkJsonObject_ObjectOf(json,"image");
    if (CkJsonObject_getLastMethodSuccess(json) == FALSE) {
        printf("image object not found.\n");
        CkJsonObject_Dispose(json);
        return;
    }

    printf("image: fname=%s, width=%d, height=%d\n",CkJsonObject_stringOf(imageObj,"fname"),CkJsonObject_IntOf(imageObj,"w"),CkJsonObject_IntOf(imageObj,"h"));

    CkJsonObject_Dispose(imageObj);

    // Get the "thumbnail" object.
    thumbObj = CkJsonObject_ObjectOf(json,"thumbnail");
    if (CkJsonObject_getLastMethodSuccess(json) == FALSE) {
        printf("thumbnail object not found.\n");
        CkJsonObject_Dispose(json);
        return;
    }

    printf("thumbnail: fname=%s, width=%d, height=%d\n",CkJsonObject_stringOf(thumbObj,"fname"),CkJsonObject_IntOf(thumbObj,"w")
        ,CkJsonObject_IntOf(thumbObj,"h"));

    CkJsonObject_Dispose(thumbObj);


    CkJsonObject_Dispose(json);

    }