On 01-06-2012 21:12, Eamonn McManus wrote:
It seems to me that since the serialization of HashMaps with more than
Integer.MAX_VALUE entries produces an output that cannot be
deserialized, nobody can be using it, and we are free to change it.
For example we could say that if the read size is -1 then the next
item in the stream is a long that is the true size, and arrange for
that to be true in writeObject when there are more than
Integer.MAX_VALUE entries.
Yeah,
I thought of something along the lines of:
long mapSize;
s.writeInt(mapSize> Integer.MAX_VALUE ? Integer.MAX_VALUE : (int)
mapSize );
for (int i=0;i<Integer.MAX_VALUE;i++) {write elements}
if (mapSize>=Integer.MAX_VALUE) {
s.writeLong(size);//write the real size
for (long i=Integer.MAX_VALUE;i<mapSize;i++) { ...write remaining
elements }
}
Whether there really are people who have HashMaps with billions of
entries that they want to serialize with Java serialization is another
question.
But it is not just serializing a HashMap that does not work.
HashMap.size() and HashMap.clear() isn't working as well.
- Kasper
