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