com.mikenhill.java.json.JavaGSON.java Source code

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Here is the source code for com.mikenhill.java.json.JavaGSON.java

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/*
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package com.mikenhill.java.json;

import com.google.gson.Gson;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonPrimitive;
import java.util.Map;
import java.util.Set;

/**
 *
 * @author mhill
 */
public class JavaGSON {
    public Gson gson;
    public static final String jsonData = "{\n" + "    \"name\": \"Alice\",\n" + "    \"age\": 20,\n"
            + "    \"address\": {\n" + "        \"streetAddress\": \"100 Wall Street\",\n"
            + "        \"city\": \"New York\"\n" + "    },\n" + "    \"phoneNumber\": [\n" + "        {\n"
            + "            \"type\": \"home\",\n" + "            \"number\": \"212-333-1111\"\n" + "        },{\n"
            + "            \"type\": \"fax\",\n" + "            \"number\": \"646-444-2222\"\n" + "        }\n"
            + "    ]\n" + "}";

    public static void main(String[] args) {
        JavaGSON javaGson = new JavaGSON();
        try {
            Gson gson = new Gson();
            javaGson.gson = gson;
            javaGson.processJSON();

        } catch (Exception pe) {
            System.out.println(pe.getMessage());
        }
    }

    private void processJSON() throws Exception {
        JsonObject parentObject = gson.fromJson(jsonData, JsonObject.class);
        processJSONObject(parentObject);
    }

    private void processJSONArray(JsonArray obj) throws Exception {
        System.out.println("JsonArray -> " + obj);
        for (JsonElement element : obj) {
            if (element instanceof JsonPrimitive) {

                processJSONPrimitive((JsonPrimitive) element);

            } else if (element instanceof JsonArray) {

                processJSONArray((JsonArray) element);

            } else if (element instanceof JsonObject) {

                processJSONObject((JsonObject) element);

            } else {
                System.out.println("Unknown -> " + element);
            }
        }
    }

    private void processJSONPrimitive(JsonPrimitive obj) throws Exception {
        System.out.println("JsonPrimitive -> " + obj);
    }

    private void processJSONObject(JsonObject obj) throws Exception {

        System.out.println("JsonObject -> " + obj);

        Set<Map.Entry<String, JsonElement>> entrySet = obj.entrySet();
        for (Map.Entry<String, JsonElement> entry : entrySet) {
            //System.out.println ("entry -> " + entry);
            JsonElement element = entry.getValue();
            if (element instanceof JsonPrimitive) {

                processJSONPrimitive((JsonPrimitive) element);

            } else if (element instanceof JsonArray) {

                processJSONArray((JsonArray) element);

            } else if (element instanceof JsonObject) {

                processJSONObject((JsonObject) element);

            } else {
                System.out.println("Unknown -> " + element);
            }
            int gg = 0;
        }

        //Get the first address city value

        //Iterate over all objects
        //        for (Object o : parentObject.) {
        //            //Look at each type
        //            if (o instanceof JsonElement) {
        //                System.out.println ("0 -> " + o);
        //            }
        //        }

        //Now select by name
        //JsonElement addressObj = parentObject.get("address");
        //System.out.println (addressObj.  "address -> " + addressObj);

        //System.out.println ("1 -> " + parentObject);
    }
}