public void readFrom(DataInputStream stream, DataExternalizer<Value> externalizer) throws IOException { while (stream.available() > 0) { final int valueCount = DataInputOutputUtil.readINT(stream); if (valueCount < 0) { removeAssociatedValue( -valueCount); // ChangeTrackingValueContainer marked inputId as invalidated, see // ChangeTrackingValueContainer.saveTo setNeedsCompacting(true); } else { for (int valueIdx = 0; valueIdx < valueCount; valueIdx++) { final Value value = externalizer.read(stream); int idCountOrSingleValue = DataInputOutputUtil.readINT(stream); if (idCountOrSingleValue > 0) { addValue(idCountOrSingleValue, value); } else { idCountOrSingleValue = -idCountOrSingleValue; ensureFileSetCapacityForValue(value, idCountOrSingleValue); int prev = 0; for (int i = 0; i < idCountOrSingleValue; i++) { final int id = DataInputOutputUtil.readINT(stream); addValue(prev + id, value); prev += id; } } } } } }