src/android/tests/src/com/google/android/inputmethod/japanese/testing/MozcPreferenceUtil.java

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package org.mozc.android.inputmethod.japanese.testing;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;

/**
 * Testing utilities about {@link SharedPreferences}.
 *
 */
public class MozcPreferenceUtil {
  // Disallow instantiation.
  private MozcPreferenceUtil() {
  }

  /**
   * @return a private {@link SharedPreferences} instance based on the given {@code name}.
   */
  public static SharedPreferences getSharedPreferences(Context context, String name) {
    return context.getSharedPreferences(name, Activity.MODE_PRIVATE);
  }

  /**
   * @return a private {@link SharedPreferences} instance, which contains given
   * {@code (key, value)}, based on the given {@code preferenceName}.
   */
  public static SharedPreferences newSharedPreference(
      Context context, String preferenceName, String key, Object value) {
    SharedPreferences sharedPreferences = getSharedPreferences(context, preferenceName);
    updateSharedPreference(sharedPreferences, key, value);
    return sharedPreferences;
  }

  /**
   * Add a {@code (key, value)} data into the given {@code sharedPreferences}.
   * Now, this method supports only {@code boolean} and {@link String}.
   */
  public static void updateSharedPreference(
      SharedPreferences sharedPreferences, String key, Object value) {
    SharedPreferences.Editor editor = sharedPreferences.edit();
    if (value.getClass() == Boolean.class) {
      editor.putBoolean(key, Boolean.class.cast(value));
    } else if (value.getClass() == String.class) {
      editor.putString(key, String.class.cast(value));
    } else if (value.getClass() == Integer.class) {
      editor.putInt(key, Integer.class.cast(value));
    } else {
      throw new IllegalArgumentException("value's type can be only Boolean or String.");
    }
    editor.commit();
  }
}