/**
* Supports Java Serialization.
*/
public override void readExternal(ObjectInput objectInput)
{
// Read the area code map storage strategy flag.
boolean useFlyweightMapStorage = objectInput.readBoolean();
if (useFlyweightMapStorage) {
areaCodeMapStorage = new FlyweightMapStorage();
} else {
areaCodeMapStorage = new DefaultMapStorage();
}
areaCodeMapStorage.readExternal(objectInput);
}
/**
* 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(SortedMap<Integer, 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,
SortedMap<Integer, String> areaCodeMap)
{
mapStorage.readFromSortedMap(areaCodeMap);
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
mapStorage.writeExternal(objectOutputStream);
objectOutputStream.flush();
int sizeOfStorage = byteArrayOutputStream.size();
objectOutputStream.close();
return sizeOfStorage;
}
