AndroidMockValuePersistence.java

// Copyright 2013 Square, Inc.
package retrofit.android;

import android.content.SharedPreferences;
import retrofit.MockRestAdapter;

/**
 * A {@link MockRestAdapter.ValueChangeListener value change listener} for {@link MockRestAdapter}
 * which stores any customized behavior values into shared preferences.
 */
public final class AndroidMockValuePersistence implements MockRestAdapter.ValueChangeListener
{
  private static final String KEY_DELAY    = "retrofit-mock-delay";
  private static final String KEY_VARIANCE = "retrofit-mock-variance";
  private static final String KEY_ERROR    = "retrofit-mock-error";

  /**
   * Install a {@link MockRestAdapter.ValueChangeListener value change listener} on the supplied
   * {@link MockRestAdapter} using the {@link SharedPreferences} for storing customized behavior
   * values. Invoking this will load any existing stored values for the mock adapter's behavior.
   */
  public static void install(MockRestAdapter mockRestAdapter, SharedPreferences preferences)
  {
    long delay = preferences.getLong(KEY_DELAY, -1);
    if (delay != -1)
    {
      mockRestAdapter.setDelay(delay);
    }

    int variance = preferences.getInt(KEY_VARIANCE, -1);
    if (variance != -1)
    {
      mockRestAdapter.setVariancePercentage(variance);
    }

    int error = preferences.getInt(KEY_ERROR, -1);
    if (error != -1)
    {
      mockRestAdapter.setErrorPercentage(error);
    }

    mockRestAdapter.setValueChangeListener(new AndroidMockValuePersistence(preferences));
  }

  private final SharedPreferences preferences;

  private AndroidMockValuePersistence(SharedPreferences preferences)
  {
    this.preferences = preferences;
  }

  @Override
  public void onMockValuesChanged(long delayMs, int variancePct, int errorPct)
  {
    preferences.edit()
               .putLong(KEY_DELAY, delayMs)
               .putInt(KEY_VARIANCE, variancePct)
               .putInt(KEY_ERROR, errorPct)
               .apply();
  }
}