FileFlatField

• To: visad-list@xxxxxxxxxxxxx
• Subject: FileFlatField
• From: "Peter X. Cao" <xcao@xxxxxxxxxxxxx>
• Date: Tue, 21 Dec 1999 09:56:45 -0600

Bill, et al.,

Suppose I want to construct a FlatField for a 5D double dataset.
Here is some example code.

====================================================================

RealType dimension_types[] = {new RealType("dim1"), new RealType("dim1"),
    new RealType("dim2"), new RealType("dim3"), new RealType("dim4")};
RealTupleType domain = new RealTupleType(dimension_types);
RealTupleType range = new RealTupleType(new RealType("Data range"));
FunctionType field_type = new FunctionType(domain, range);

int[] d = {1000, 500, 100, 50, 20};
IntegerNDSet domain_set = new IntegerNDSet(domain, d);
DoubleSet[] range_set = {new DoubleSet(range)};
FlatField ff = new FlatField(field_type, domain_set, null, null, range_set,
null);
======================================================================

Obviously, it will not work because the dataset has 400GB
(1000*500*100*50*20*8).
So I want to use FileFlatField instead of FlatField. There is only one
constructor
for FileFlatField, FileFlatField(FileAccessor accessor, CacheStrategy
strategy).
I don't know how to set the FileAccessor and CacheStrategy. I couldn't find
any 
such example in the Developers Guide. Could tell me how to construct such a 
FileFlatField ?




-----------------------------------------------------------
Thanks,

Peter Xiangchi Cao
Tel. (217) 244-3830
Fax. (217) 244-1987
Scientific Data Technologies Division
National Center for Supercomputing Applications

• Follow-Ups:
  • Re: FileFlatField
    • From: Bill Hibbard