I need to pass key/value pairs via RPC. The value may be any
primitive or java.util.Date. I plan to create a Serializable
"TransferValue" class that, in turn, contains the actual value. There
are 3 approaches I can take, but not sure which would be the most
efficient:
1) Declare one java.lang.* wrapper class for each primitive I might
want to pass. The not-null one would be the one that's carrying the
value:
public final class TransferValue extends Object implements
Serializable
{
public String _string;
public Date _date;
public Boolean _boolean;
public Long _long;
}
2) Declare one variable for each type of primitive I might want to
pass, plus something to indicate which carries the value:
public final class TransferValue extends Object implements
Serializable
{
public char _dataType; // s = String, d = Date, b = boolean, and
so on...
public String _string;
public Date _date;
public boolean _boolean;
public long _long;
}
3) Pass all data as java.lang.String, and just use methods on the
client and server to encode & decode to the actual type as needed:
public final class TransferValue extends Object implements
Serializable
{
public char _dataType;
public String _string;
}
Option 1 is the probably the "cleanest" approach, but is there
overhead to have N-1 unused java.lang.* wrapper class fields in every
"value" I pass?
Option 2 attempts to be more efficient with primitives but is probably
worse, since every primitive will bloat my TransferValue object
needlessly with their default values?
Option 3 is probably the least "clean" since I have to convert things
like Dates back and forth into Strings but would appear to be the most
efficient.
Since it's not so clear, thought I would ask the experts. Thanks in
advance.
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