Java tutorial
/* * Copyright (C) 2012-2015 Oleg Dolya * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/> */ package com.jaceace.utils; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.Iterator; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.json.JSONTokener; public class Bundle { private static final String CLASS_NAME = "__className"; private static HashMap<String, String> aliases = new HashMap<String, String>(); private JSONObject data; public Bundle() { this(new JSONObject()); } public String toString() { return data.toString(); } private Bundle(JSONObject data) { this.data = data; } public boolean isNull() { return data == null; } public ArrayList<String> fields() { ArrayList<String> result = new ArrayList<String>(); @SuppressWarnings("unchecked") Iterator<String> iterator = data.keys(); while (iterator.hasNext()) { result.add(iterator.next()); } return result; } public boolean contains(String key) { return !data.isNull(key); } public boolean getBoolean(String key) { return data.optBoolean(key); } public int getInt(String key) { return data.optInt(key); } public float getFloat(String key) { return (float) data.optDouble(key); } public String getString(String key) { return data.optString(key); } public Bundle getBundle(String key) { return new Bundle(data.optJSONObject(key)); } private Bundlable get() { try { String clName = getString(CLASS_NAME); if (aliases.containsKey(clName)) { clName = aliases.get(clName); } Class<?> cl = Class.forName(clName); if (cl != null) { Bundlable object = (Bundlable) cl.newInstance(); object.restoreFromBundle(this); return object; } else { return null; } } catch (Exception e) { e = null; return null; } } public Bundlable get(String key) { return getBundle(key).get(); } public <E extends Enum<E>> E getEnum(String key, Class<E> enumClass) { try { return (E) Enum.valueOf(enumClass, data.getString(key)); } catch (JSONException e) { return enumClass.getEnumConstants()[0]; } } public int[] getIntArray(String key) { try { JSONArray array = data.getJSONArray(key); int length = array.length(); int[] result = new int[length]; for (int i = 0; i < length; i++) { result[i] = array.getInt(i); } return result; } catch (JSONException e) { return null; } } public boolean[] getBooleanArray(String key) { try { JSONArray array = data.getJSONArray(key); int length = array.length(); boolean[] result = new boolean[length]; for (int i = 0; i < length; i++) { result[i] = array.getBoolean(i); } return result; } catch (JSONException e) { return null; } } public String[] getStringArray(String key) { try { JSONArray array = data.getJSONArray(key); int length = array.length(); String[] result = new String[length]; for (int i = 0; i < length; i++) { result[i] = array.getString(i); } return result; } catch (JSONException e) { return null; } } public Collection<Bundlable> getCollection(String key) { ArrayList<Bundlable> list = new ArrayList<Bundlable>(); try { JSONArray array = data.getJSONArray(key); for (int i = 0; i < array.length(); i++) { list.add(new Bundle(array.getJSONObject(i)).get()); } } catch (JSONException e) { } return list; } public void put(String key, boolean value) { try { data.put(key, value); } catch (JSONException e) { } } public void put(String key, int value) { try { data.put(key, value); } catch (JSONException e) { } } public void put(String key, float value) { try { data.put(key, value); } catch (JSONException e) { } } public void put(String key, String value) { try { data.put(key, value); } catch (JSONException e) { } } public void put(String key, Bundle bundle) { try { data.put(key, bundle.data); } catch (JSONException e) { } } public void put(String key, Bundlable object) { if (object != null) { try { Bundle bundle = new Bundle(); bundle.put(CLASS_NAME, object.getClass().getName()); object.storeInBundle(bundle); data.put(key, bundle.data); } catch (JSONException e) { } } } public void put(String key, Enum<?> value) { if (value != null) { try { data.put(key, value.name()); } catch (JSONException e) { } } } public void put(String key, int[] array) { try { JSONArray jsonArray = new JSONArray(); for (int i = 0; i < array.length; i++) { jsonArray.put(i, array[i]); } data.put(key, jsonArray); } catch (JSONException e) { } } public void put(String key, boolean[] array) { try { JSONArray jsonArray = new JSONArray(); for (int i = 0; i < array.length; i++) { jsonArray.put(i, array[i]); } data.put(key, jsonArray); } catch (JSONException e) { } } public void put(String key, String[] array) { try { JSONArray jsonArray = new JSONArray(); for (int i = 0; i < array.length; i++) { jsonArray.put(i, array[i]); } data.put(key, jsonArray); } catch (JSONException e) { } } public void put(String key, Collection<? extends Bundlable> collection) { JSONArray array = new JSONArray(); for (Bundlable object : collection) { Bundle bundle = new Bundle(); bundle.put(CLASS_NAME, object.getClass().getName()); object.storeInBundle(bundle); array.put(bundle.data); } try { data.put(key, array); } catch (JSONException e) { } } public static Bundle read(InputStream stream) { try { BufferedReader reader = new BufferedReader(new InputStreamReader(stream)); StringBuilder all = new StringBuilder(); String line = reader.readLine(); while (line != null) { all.append(line); line = reader.readLine(); } JSONObject json = (JSONObject) new JSONTokener(all.toString()).nextValue(); reader.close(); return new Bundle(json); } catch (Exception e) { return null; } } public static Bundle read(byte[] bytes) { try { JSONObject json = (JSONObject) new JSONTokener(new String(bytes)).nextValue(); return new Bundle(json); } catch (JSONException e) { return null; } } public static boolean write(Bundle bundle, OutputStream stream) { try { BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(stream)); writer.write(bundle.data.toString()); writer.close(); return true; } catch (IOException e) { return false; } } public static void addAlias(Class<?> cl, String alias) { aliases.put(alias, cl.getName()); } }