Package ucar.nc2.iosp.hdf5

Class H5tiledLayout

java.lang.Object

ucar.nc2.iosp.hdf5.H5tiledLayout

All Implemented Interfaces:

Layout

public class H5tiledLayout
extends Object
implements Layout

Iterator to read/write subsets of an array. This calculates byte offsets for HD5 chunked datasets. Assumes that the data is stored in chunks, indexed by a Btree. for unfiltered data only

Nested Class Summary

Nested classes/interfaces inherited from interface ucar.nc2.iosp.Layout

Layout.Chunk

Constructor Summary

Constructors

Constructor	Description
H5tiledLayout(H5header.Vinfo vinfo, DataType dtype, Section wantSection)	Constructor.

Method Summary

Modifier and Type	Method	Description
int	getElemSize()	Get size of each element in bytes.
long	getTotalNelems()	Get total number of elements in the wanted subset.
boolean	hasNext()	Is there more to do
Layout.Chunk	next()	Get the next chunk
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

H5tiledLayout

public H5tiledLayout(H5header.Vinfo vinfo,
                     DataType dtype,
                     Section wantSection)
              throws IOException

Constructor. This is for HDF5 chunked data storage. The data is read by chunk, for efficency.

Parameters:

vinfo - the vinfo object for this variable

dtype - type of data. may be different from v2.

wantSection - the wanted section of data, contains a List of Range objects, must be complete

Throws:

IOException - on io error

Method Detail

getTotalNelems

public long getTotalNelems()

Description copied from interface: Layout

Get total number of elements in the wanted subset.

Specified by:

getTotalNelems in interface Layout

Returns:

total number of elements in the wanted subset.

getElemSize

public int getElemSize()

Description copied from interface: Layout

Get size of each element in bytes.

Specified by:

getElemSize in interface Layout

Returns:

size of each element in bytes.

hasNext

public boolean hasNext()

Description copied from interface: Layout

Is there more to do

Specified by:

hasNext in interface Layout

Returns:

true if theres more to do

next

public Layout.Chunk next()

Description copied from interface: Layout

Get the next chunk

Specified by:

next in interface Layout

Returns:

next chunk, or null if !hasNext()

toString

public String toString()

Overrides:

toString in class Object