Package ucar.nc2.internal.iosp.hdf5

Class H5tiledLayoutBB

java.lang.Object

ucar.nc2.internal.iosp.hdf5.H5tiledLayoutBB

All Implemented Interfaces:

Layout, LayoutBB

public class H5tiledLayoutBB
extends Object
implements LayoutBB

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. Used for filtered data Had to split from old H5tiledLayoutBB because need to use H5headerNew.Vinfo.

Nested Class Summary

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

LayoutBB.Chunk

Field Summary

Fields

Modifier and Type	Field	Description
static boolean	debugFilter

Constructor Summary

Constructors

Constructor	Description
H5tiledLayoutBB(Variable v2, Section wantSection, RandomAccessFile raf, ucar.nc2.internal.iosp.hdf5.H5objects.Filter[] filterProps, ByteOrder byteOrder)	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
LayoutBB.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

Field Detail

debugFilter

public static boolean debugFilter

Constructor Detail

H5tiledLayoutBB

public H5tiledLayoutBB(Variable v2,
                       Section wantSection,
                       RandomAccessFile raf,
                       ucar.nc2.internal.iosp.hdf5.H5objects.Filter[] filterProps,
                       ByteOrder byteOrder)
                throws InvalidRangeException,
                       IOException

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

Parameters:

v2 - Variable to index over; assumes that vinfo is the data object

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

raf - the RandomAccessFile

filterProps - set of filter properties from which filter object will be created

Throws:

InvalidRangeException - if section invalid for this variable

IOException - on io error

Method Detail

getTotalNelems

public long getTotalNelems()

Description copied from interface: LayoutBB

Get total number of elements in the wanted subset.

Specified by:

getTotalNelems in interface Layout

Specified by:

getTotalNelems in interface LayoutBB

Returns:

total number of elements in the wanted subset.

getElemSize

public int getElemSize()

Description copied from interface: LayoutBB

Get size of each element in bytes.

Specified by:

getElemSize in interface Layout

Specified by:

getElemSize in interface LayoutBB

Returns:

size of each element in bytes.

hasNext

public boolean hasNext()

Description copied from interface: LayoutBB

Is there more to do

Specified by:

hasNext in interface Layout

Specified by:

hasNext in interface LayoutBB

Returns:

true if theres more to do

next

public LayoutBB.Chunk next()

Description copied from interface: LayoutBB

Get the next chunk

Specified by:

next in interface Layout

Specified by:

next in interface LayoutBB

Returns:

next chunk, or null if !hasNext()

toString

public String toString()

Overrides:

toString in class Object