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JWalk javadocs

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Tim Bray 2014-05-11 20:06:07 -07:00
parent bbc0694700
commit d9df048194
1 changed files with 48 additions and 0 deletions
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48
OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/JWalk.java
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@ -23,29 +23,77 @@ import org.json.JSONObject;
/**
* Minimal hierarchy selector
*
* This is for picking out an item in a large multilevel JSON object, for example look at
* the Keybase.io User object, documentation at https://keybase.io/__/api-docs/1.0#user-objects
* an example available via
* curl https://keybase.io/_/api/1.0/user/lookup.json?username=timbray
*
* If you want to retrieve the ascii-armored key, you'd say
* String key = JWalk.getString(match,"them", "public_keys", "primary", "bundle");
*/
public class JWalk {
/**
* Returns an int member value from the JSON sub-object addressed by the path
*
* @param json The object
* @param path list of string object member selectors
* @return the int addressed by the path, assuming such a thing exists
* @throws JSONException if any step in the path doesn’t work
*/
public static int getInt(JSONObject json, String... path) throws JSONException {
json = walk(json, path);
return json.getInt(path[path.length - 1]);
}
/**
* Returns a long member value from the JSON sub-object addressed by the path
*
* @param json The object
* @param path list of string object member selectors
* @return the int addressed by the path, assuming such a thing exists
* @throws JSONException if any step in the path doesn’t work
*/
public static long getLong(JSONObject json, String... path) throws JSONException {
json = walk(json, path);
return json.getLong(path[path.length - 1]);
}
/**
* Returns a String member value from the JSON sub-object addressed by the path
*
* @param json The object
* @param path list of string object member selectors
* @return the int addressed by the path, assuming such a thing exists
* @throws JSONException if any step in the path doesn’t work
*/
public static String getString(JSONObject json, String... path) throws JSONException {
json = walk(json, path);
return json.getString(path[path.length - 1]);
}
/**
* Returns a JSONArray member value from the JSON sub-object addressed by the path
*
* @param json The object
* @param path list of string object member selectors
* @return the int addressed by the path, assuming such a thing exists
* @throws JSONException if any step in the path doesn’t work
*/
public static JSONArray getArray(JSONObject json, String... path) throws JSONException {
json = walk(json, path);
return json.getJSONArray(path[path.length - 1]);
}
/**
* Returns a JSONObject member value from the JSON sub-object addressed by the path, or null
*
* @param json The object
* @param path list of string object member selectors
* @return the int addressed by the path, assuming such a thing exists
* @throws JSONException if any step in the path, except for the last, doesn’t work
*/
public static JSONObject optObject(JSONObject json, String... path) throws JSONException {
json = walk(json, path);
return json.optJSONObject(path[path.length - 1]);