Base class for data manager pattern

BaseDataManager

import java.util.HashMap;
import java.util.Map;
import java.util.Set;
 
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.util.Log;
 
import com.stratpoint.starstrak.StarstrakApplication;
 
public class BaseDataManager {
	private static final String TAG = BaseDataManager.class.getSimpleName();
	protected static Context context = ;
	protected static HashMap<String, SharedPreferences> preferenceCahe = new HashMap<String, SharedPreferences>();
 
	protected static SharedPreferences getSharedPreferences(String name){
		if (!preferenceCahe.containsKey(name)) {
			preferenceCahe.put(name, context.getSharedPreferences(name, Context.MODE_PRIVATE));
		}
 
		return preferenceCahe.get(name);
	}
 
	protected static Editor editSharedPreferences(String name){
		return getSharedPreferences(name).edit();
	}
 
	/**
	 * Convenience method for determining if shared preference file contains a specific key
	 * @param name name of the shared preference file
	 * @param key key used to map string in shared preference file
	 * @return true or false
	 */
	protected static boolean hasKey(String name, String key){
		return getSharedPreferences(name).contains(key);
	}
 
	/**
	 * Convenience method for getting a string value from a specified shared preference file
	 * @param name name of the shared preference file
	 * @param key key used to map string in shared preference file
	 * @param defValue value to be used in case mapping does not exist
	 * @return value for key or null if does not exist
	 */
	protected static String getString(String name, String key, String defValue){
		return getSharedPreferences(name).getString(key, defValue);
	}
 
	/**
	 * Convenience method for saving a string to a specific shared preference file using specified key.
	 * 
	 * Useful for quick commits where you are to save only one value. For saving multiple values, use
	 * an editor instead:
	 * 
	 * Editor editor = editSharedPreferences(name);
	 * editor.putString(key, value);
	 * editor.putBoolean(key, value);
	 * editor.putInt(key, value);
	 * editor.commit();
	 * 
	 * @param name name of the shared preference file
	 * @param key key used to map string in shared preference file
	 * @param value value to be saved
	 */
	protected static void saveString(String name, String key, String value){
		getSharedPreferences(name).edit().putString(key, value).commit();
	}
 
	/**
	 * Convenience method for getting a boolean value from a specified shared preference file
	 * @param name name of the shared preference file
	 * @param key key used to map string in shared preference file
	 * @return boolean value, or false if doesn't exist
	 */
	protected static boolean getBoolean(String name, String key, boolean defValue){
		return getSharedPreferences(name).getBoolean(key, defValue);
	}
 
	/**
	 * Convenience method for saving a boolean to a specific shared preference file using specified key.
	 * 
	 * Useful for quick commits where you are to save only one value. For saving multiple values, use
	 * an editor instead:
	 * 
	 * Editor editor = editSharedPreferences(name);
	 * editor.putString(key, value);
	 * editor.putBoolean(key, value);
	 * editor.putInt(key, value);
	 * editor.commit();
	 * 
	 * @param name name of the shared preference file
	 * @param key key used to map string in shared preference file
	 * @param value value to be saved
	 */
	protected static void saveBoolean(String name, String key, boolean value){
		getSharedPreferences(name).edit().putBoolean(key, value).commit();
	}
 
	/**
	 * Convenience method for getting an integer value from a specified shared preference file
	 * @param name name of the shared preference file
	 * @param key key used to map string in shared preference file
	 * @return boolean value, or false if doesn't exist
	 */
	protected static int getInt(String name, String key, int defValue){
		return getSharedPreferences(name).getInt(key, defValue);
	}
 
	/**
	 * Convenience method for saving an integer to a specific shared preference file using specified key.
	 * 
	 * Useful for quick commits where you are to save only one value. For saving multiple values, use
	 * an editor instead:
	 * 
	 * Editor editor = editSharedPreferences(name);
	 * editor.putString(key, value);
	 * editor.putBoolean(key, value);
	 * editor.putInt(key, value);
	 * editor.commit();
	 * 
	 * @param name name of the shared preference file
	 * @param key key used to map string in shared preference file
	 * @param value value to be saved
	 */
	protected static void saveInt(String name, String key, int value){
		getSharedPreferences(name).edit().putInt(key, value).commit();
	}
 
	/**
	 * Print out the contents of the specified preferences file to the logcat. Useful for debugging.
	 * @param name of preference file
	 */
	protected static void printContents(String name){
		SharedPreferences preferences = getSharedPreferences(name);
		Map<String, ?> mappings = preferences.getAll();
		Set<String> keys = mappings.keySet();
		Log.i(TAG, "Printing contents of shared preference: " + name);
		for (String key: keys){
			Log.d(TAG, "[" + key + "]" + ": " + mappings.get(key).toString());
		}
	}
}