if (file != null) {
type = TYPE_FILE;
count++;
}
if (count <= 0 || count > 1) {
<BUG>throw new IllegalArgumentException("the params , content , file , bytes must has one and only one .");
</BUG>
}
}
@Override

if (file != null) {
type = TYPE_FILE;
count++;
}
if (count <= 0 || count > 1) {
throw new IllegalArgumentException("The params , content , file , bytes must has one and only one .");
}
}
@Override
