Java

Find and Delete Object from JSON Array

See more JSON Examples

Demonstrates how to find an delete an object from a JSON array of objects. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonArray;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example will delete the "Pasta" category object from Menu B.

        // {
        //   "menus": [
        //     {
        //       "name": "Menu A",
        //       "categories": [
        //             {
        //             "name": "Kebabs",
        //             "description": "blah blah blah"
        //             },
        //             {
        //             "name": "Burgers",
        //             "description": "blah blah blah"
        //             },
        //             {
        //             "name": "Pasta",
        //             "description": "blah blah blah"
        //             },
        //             {
        //             "name": "Appetizers",
        //             "description": "blah blah blah"
        //             }
        //         ]
        //     },
        //     {
        //       "name": "Menu B",
        //       "categories": [
        //             {
        //             "name": "Kebabs",
        //             "description": "blah blah blah"
        //             },
        //             {
        //             "name": "Burgers",
        //             "description": "blah blah blah"
        //             },
        //             {
        //             "name": "Pasta",
        //             "description": "blah blah blah"
        //             },
        //             {
        //             "name": "Appetizers",
        //             "description": "blah blah blah"
        //             }
        //         ]
        //       }
        //     ]
        // }

        JsonObject json = new JsonObject();
        try {
            json.loadFile("qa_data/json/menus.json");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Find Menu B.
        JsonObject menu = json.findRecord("menus", "name", "Menu B", true);
        // assume menu is found..

        // Get the categories array, and then find the index of the "Pasta" menu category.
        JsonArray catArr = menu.arrayOf("categories");
        // Assume it is found..

        // Find the object where the name of the JSON member is "name", and the value is "Pasta"
        int index = catArr.findObject("name", "Pasta", true);
        if (index < 0) {
            System.out.println("Pasta not found.");
        } else {
            // Delete the "Pasta" category record from Menu B
            catArr.deleteAt(index);
            // Assume OK..
        }

        // Examine the JSON to see if it worked as expected..
        json.setEmitCompact(false);
        System.out.println(json.emit());

        catArr.close();
        menu.close();
    }
}