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The source code is released under:
Copyright (c) 2013 Nitin Dhar Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Softwar...
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package com.nitindhar.lifesaver.data; // w w w . jav a 2 s . c om import android.content.SharedPreferences; import com.google.common.base.Optional; import com.nitindhar.lifesaver.model.Session; import com.nitindhar.lifesaver.model.Subway; public class SessionSharedPreferencesDao implements SessionDao { private static final String SESSION_KEY_MRS = "most_recent_subway"; private final SharedPreferences preferences; public SessionSharedPreferencesDao(SharedPreferences preferences) { this.preferences = preferences; } @Override public boolean sessionExists() { return preferences.getString(SESSION_KEY_MRS, null) != null; } @Override public boolean storeSession(Session session) { SharedPreferences.Editor editor = preferences.edit(); editor.putString(SESSION_KEY_MRS, session.getMostRecentSubway().getCode()); return editor.commit(); } @Override public Session retrieveSession() { Optional<Subway> subwayOpt = Subway.fromString(preferences.getString(SESSION_KEY_MRS, null)); if(subwayOpt.isPresent()) { return new Session(subwayOpt.get()); } else { throw new IllegalStateException("No subway code received"); } } }