/**
* Gets the smaller area code map storage strategy according to the provided area code map. It
* actually uses (outputs the data to a stream) both strategies and retains the best one which
* make this method quite expensive.
*/
// @VisibleForTesting
public AreaCodeMapStorageStrategy getSmallerMapStorage(SortedDictionary <int, String> areaCodeMap)
{
AreaCodeMapStorageStrategy flyweightMapStorage = createFlyweightMapStorage();
int sizeOfFlyweightMapStorage = getSizeOfAreaCodeMapStorage(flyweightMapStorage, areaCodeMap);
AreaCodeMapStorageStrategy defaultMapStorage = createDefaultMapStorage();
int sizeOfDefaultMapStorage = getSizeOfAreaCodeMapStorage(defaultMapStorage, areaCodeMap);
return(sizeOfFlyweightMapStorage < sizeOfDefaultMapStorage
? flyweightMapStorage : defaultMapStorage);
}
/**
* Creates an {@link AreaCodeMap} initialized with {@code sortedAreaCodeMap}. Note that the
* underlying implementation of this method is expensive thus should not be called by
* time-critical applications.
*
* @param sortedAreaCodeMap a map from phone number prefixes to descriptions of corresponding
* geographical areas, sorted in ascending order of the phone number prefixes as integers.
*/
public void readAreaCodeMap(SortedDictionary<int, String> sortedAreaCodeMap)
{
areaCodeMapStorage = getSmallerMapStorage(sortedAreaCodeMap);
}
/**
* Gets the size of the provided area code map storage. The map storage passed-in will be filled
* as a result.
*/
private static int getSizeOfAreaCodeMapStorage(AreaCodeMapStorageStrategy mapStorage,
SortedDictionary<int, String> areaCodeMap)
{
mapStorage.readFromSortedMap(areaCodeMap);
return mapStorage.getStorageSize();
}
/**
* Creates an {@link AreaCodeMap} initialized with {@code sortedAreaCodeMap}. Note that the
* underlying implementation of this method is expensive thus should not be called by
* time-critical applications.
*
* @param sortedAreaCodeMap a map from phone number prefixes to descriptions of corresponding
* geographical areas, sorted in ascending order of the phone number prefixes as integers.
*/
public void readAreaCodeMap(SortedDictionary <int, String> sortedAreaCodeMap)
{
areaCodeMapStorage = getSmallerMapStorage(sortedAreaCodeMap);
}
/**
* Gets the size of the provided area code map storage. The map storage passed-in will be filled
* as a result.
*/
private static int getSizeOfAreaCodeMapStorage(AreaCodeMapStorageStrategy mapStorage,
SortedDictionary <int, String> areaCodeMap)
{
mapStorage.readFromSortedMap(areaCodeMap);
return(mapStorage.getStorageSize());
}
