Issue 5235 - Refactoring on SharedPrefs

adblockplussbrowser/src/org/adblockplus/sbrowser/contentblocker/util/SharedPrefsUtils.java

Index: adblockplussbrowser/src/org/adblockplus/sbrowser/contentblocker/util/SharedPrefsUtils.java
===================================================================
new file mode 100644
--- /dev/null
+++ b/adblockplussbrowser/src/org/adblockplus/sbrowser/contentblocker/util/SharedPrefsUtils.java
@@ -0,0 +1,167 @@
+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2016 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus 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 Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.adblockplus.sbrowser.contentblocker.util;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+
+import java.util.Set;
+
+public class SharedPrefsUtils
+{
+
+  public static void putBoolean(Context context, int keyResId, boolean value)
+  {
+    final SharedPreferences.Editor editor = getDefaultSharedPreferences(context).edit();
+    editor.putBoolean(context.getString(keyResId), value).apply();
+  }
+
+  public static boolean getBoolean(Context context, int keyResId, boolean defValue)
+  {
+    final SharedPreferences preferences = getDefaultSharedPreferences(context);
+    try
+    {
+      return preferences.getBoolean(context.getString(keyResId), defValue);
+    }
+    catch (ClassCastException e)
+    {
+      return defValue;
+    }
+  }
+
+  public static void putInt(Context context, int keyResId, int value)
+  {
+    final SharedPreferences.Editor editor = getDefaultSharedPreferences(context).edit();
+    editor.putInt(context.getString(keyResId), value).apply();
+  }
+
+  public static int getInt(Context context, int keyResId, int defValue)
+  {
+    final SharedPreferences preferences = getDefaultSharedPreferences(context);
+    try
+    {
+      return preferences.getInt(context.getString(keyResId), defValue);
+    }
+    catch (ClassCastException e)
+    {
+      return defValue;
+    }
+  }
+
+  public static void putString(Context context, int keyResId, String value)
+  {
+    final SharedPreferences.Editor editor = getDefaultSharedPreferences(context).edit();
+    editor.putString(context.getString(keyResId), value).apply();
+  }
+
+  public static String getString(Context context, int keyResId, String defValue)
+  {
+    final SharedPreferences preferences = getDefaultSharedPreferences(context);
+    try
+    {
+      return preferences.getString(context.getString(keyResId), defValue);
+    }
+    catch (ClassCastException e)
+    {
+      return defValue;
+    }
+  }
+
+  public static void putStringSet(Context context, int keyResId, Set<String> values)
+  {
+    final SharedPreferences.Editor editor = getDefaultSharedPreferences(context).edit();
+    editor.putStringSet(context.getString(keyResId), values).apply();
+  }
+
+  public static Set<String> getStringSet(Context context, int keyResId, Set<String> defValues)
+  {
+    final SharedPreferences preferences = getDefaultSharedPreferences(context);
+    try
+    {
+      return preferences.getStringSet(context.getString(keyResId), defValues);
+    }
+    catch (ClassCastException e)
+    {
+      return defValues;
+    }
+  }
+
+  public static void registerOnSharedPreferenceChangeListener(Context context,
+      OnSharedPreferenceChangeListener listener)
+  {
+    getDefaultSharedPreferences(context).registerOnSharedPreferenceChangeListener(
+        new OnSharedPreferenceChangeListenerWrapper(listener)
+    );
+  }
+
+  public static void unregisterOnSharedPreferenceChangeListener(Context context,
+      OnSharedPreferenceChangeListener listener)
+  {
+    getDefaultSharedPreferences(context).unregisterOnSharedPreferenceChangeListener(
+        new OnSharedPreferenceChangeListenerWrapper(listener)
+    );
+  }
+
+  private static SharedPreferences getDefaultSharedPreferences(Context context)
+  {
+    return PreferenceManager.getDefaultSharedPreferences(context.getApplicationContext());
+  }
+
+  private static class OnSharedPreferenceChangeListenerWrapper
+      implements SharedPreferences.OnSharedPreferenceChangeListener
+  {
+
+    private final OnSharedPreferenceChangeListener listener;
+
+    OnSharedPreferenceChangeListenerWrapper(OnSharedPreferenceChangeListener listener) {
+      this.listener = listener;
+    }
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key)
+    {
+      this.listener.onSharedPreferenceChanged(key);
+    }
+
+    @Override
+    public boolean equals(Object obj)
+    {
+      if (this == obj)
+      {
+        return true;
+      }
+      else if (obj instanceof OnSharedPreferenceChangeListenerWrapper)
+      {
+        return this.listener.equals(((OnSharedPreferenceChangeListenerWrapper) obj).listener);
+      }
+      return false;
+    }
+
+    @Override
+    public int hashCode()
+    {
+      return this.listener.hashCode();
+    }
+  }
+
+  public interface OnSharedPreferenceChangeListener
+  {
+    void onSharedPreferenceChanged(String key);
+  }
+}