How to write a json field to get it?

Question

I am currently using json for my code to retrieve an array of booleans. However, I am adding a subfield to reach another array inside, but I am not very good at json and somehow stuck on how to do this. Here is my code:

field values:

public enum Field { /** * Runtime Config Fields **/ FIELD_CAN_CHANGE_PASSWORD("canChangePassword", true, canUpdate), FIELD_MAX_AUTO_DOWNLOAD_SIZE("maxAutoDownloadSize", 5000000L), FIELD_ALWAYS_REAUTHENTICATE("alwaysReauthenticate", false, canUpdate), FIELD_CAN_START_CALL("canStartCall", false), FIELD_ROOMS_ENABLED("roomsEnabled", !Core.isMessenger()), FIELD_CAN_CREATE_ROOM("canCreateRoom", !Core.isMessenger(), canUpdate), FIELD_MAX_ENVELOPE_TTL("maxTTL", Core.isMessenger() ? 518400L : 31536000L, canUpdate), FIELD_MAX_BURN_ON_READ_TTL("maxBOR", 0L, canUpdate), FIELD_MAX_UPLOAD_SIZE("maxUploadSize", -1L, true), FIELD_FRIEND_FINDER("friendFinder", !Core.isEnterprise(), canUpdate), FIELD_ONLY_SHOW_IN_NETWORK_CONTACTS("onlyShowInNetwork", false), FIELD_CAN_ADD_CONTACT("canAddContact", true, canUpdate), FIELD_FORCE_DEVICE_LOCKOUT("forceDeviceLockout", 5L, canUpdate), FIELD_VERIFICATION_MODE("verificationMode", VerificationMode.OPTIONAL.getValue(), true), FIELD_ENABLE_NOTIFICATION_PREVIEW("enableNotificationPreview", true, true), FIELD_DIRECTORY_ENABLED("directoryEnabled", true, true); public String fieldName; public Object defaultValue; public boolean updateFromServer; Field(String key, Object defaultValue) { this(key, defaultValue, true); } Field(String key, Object defaultValue, boolean updateFromServer) { this.fieldName = key; this.defaultValue = defaultValue; this.updateFromServer = updateFromServer; } } 

entering values ​​in the field:

  private void putValueForField(JSONObject configuration, Field field) { try { if (configuration.isNull(field.fieldName)) { Object value = field.defaultValue; if (value instanceof long[]) { JSONArray array = new JSONArray(); for (long obj : (long[]) field.defaultValue) { array.put(obj); } value = array; } runtimeConfiguration.put(field.fieldName, value); } else { runtimeConfiguration.put(field.fieldName, configuration.get(field.fieldName)); } } catch (JSONException e) { } } 

getting values:

  private Object getValueForField(Field field) { if (runtimeConfiguration.has(field.fieldName) && field.updateFromServer) { try { Object value = runtimeConfiguration.get(field.fieldName); if (value instanceof JSONArray) { JSONArray values = (JSONArray) value; if (values.get(0) instanceof Number) { long[] retVals = new long[values.length()]; for (int i = 0; i < values.length(); i++) { retVals[i] = ((Number) values.get(i)).longValue(); } return retVals; } } else if (value instanceof Number) { return ((Number) value).longValue(); } else { return value; } } catch (Exception e) { e.printStackTrace(); } } return field.defaultValue; } 

one of the methods using the fields above:

  public boolean canChangePassword() { return (boolean) getValueForField(Field.FIELD_CAN_CHANGE_PASSWORD); } 

My new json:

{"enableNotificationPreview":true,"destructOnRead":[30,60,300],"alwaysReauthenticate":false,"forceDeviceLockout":0,"permmod":1516894585,"maxBOR":0,"roomsEnabled":true,"directoryEnabled":true,"canStartCall":true,"canAddContact":true,"legacyDownload":false,"verificationMode":1,"restrictedAdmin":false,"canChangePassword":true,"friendFinder":true,"NEWVALUE":{"canStartNewValue1":true,"canStartroupValue":true,"canVideoCall":true,"canStartRoomValue":true,"canAddtoValue":true,"canStartValueshare":true},"canCreateRoom":true,"maxTTL":2592000,"onlyShowInNetwork":false,"maxUploadSize":null,"availableEnvelopeTTL":[0,600,3600,86400,604800,2592000],"maxAutoDownloadSize":7340032}

where do i connect:

"NewValue": {"canStartNewValue1": true, canStartroupValue: true, canVideoCall: true, canStartRoomValue: true, canAddtoValue: true, canStartValueshare: true}

Don't know how to update my putValueForField to reflect this new json and related fields. Any ideas?

Answer 1

To test and retrieve a JSONObject from a json object, you can change your method to check the instance of JSONObject and assign a value to it.

  private void putValueForField(JSONObject configuration, Field field) { try { if (configuration.isNull(field.fieldName)) { Object value = field.defaultValue; if (value instanceof long[]) { JSONArray array = new JSONArray(); for (long obj : (long[]) field.defaultValue) { array.put(obj); } value = array; } // this is how you check if fieldName is of type jsonobject if (value instanceof JSONObject) { JSONObject valueObject = configuration.getJSONObject(field.fieldName); value = valueObject; } runtimeConfiguration.put(field.fieldName, value); } else { runtimeConfiguration.put(field.fieldName, configuration.get(field.fieldName)); } } catch (JSONException e) { } } 

The form I can understand is that you just get the values ​​from JSON and store them in a field in this case:

I think that in this method, in the end, you just save all the values ​​as object only so that when searching you need to check all this again.

If you get a response from a server with fixed fields and Objects, you must create a class from this configuration, where you will know what exactly it will return. It would really make life easier.

Or maybe if you just need a configuration for getting / updating or setting values, you can save it in the json object itself Android reference JSON doc

For example, let's say you have this jsonobject yourself, I added a working example below, hope this helps.

 import org.json.*; class Main { public static void main(String[] args) throws JSONException { String jsn = "{\"enableNotificationPreview\":true,\"destructOnRead\":[30,60,300],\"" + "alwaysReauthenticate\":false,\"forceDeviceLockout\":0,\"NEWVALUE\":{\"canStartNewValue1\":true," + "\"canStartroupValue\":true,\"canVideoCall\":true,\"canStartRoomValue\":true},\"canCreateRoom\":true," + "\"maxTTL\":2592000,\"onlyShowInNetwork\":false,\"maxUploadSize\":null,\"availableEnvelopeTTL\"" + ":[0,600,3600,86400,604800,2592000],\"maxAutoDownloadSize\":7340032}"; JSONObject jsnObj = new JSONObject(jsn); Object enableNotificationPreview = jsnObj.get("enableNotificationPreview"); // or if you know it will be boolean boolean enableNotificationPreviewBool = jsnObj.getBoolean("enableNotificationPreview"); System.out.println(enableNotificationPreview); // output : true System.out.println(enableNotificationPreviewBool); // output : true JSONObject NEWVALUEObj = jsnObj.getJSONObject("NEWVALUE"); // now again you can extract values from it boolean canStartNewValue1 = NEWVALUEObj.getBoolean("canStartNewValue1"); System.out.println(canStartNewValue1); NEWVALUEObj.put("canStartNewValue1", false); System.out.println(NEWVALUEObj.toString()); jsnObj.put("forceDeviceLockout", 23456); // now canStartNewValue1 value is changed to false in the object // and forceDeviceLockout is also 23456 System.out.println(jsnObj.toString()); } }