ucar.nc2.iosp.noaa

Class Ghcnm

java.lang.Object

ucar.nc2.iosp.AbstractIOServiceProvider

ucar.nc2.iosp.noaa.Ghcnm

All Implemented Interfaces:

ucar.nc2.iosp.IOServiceProvider

public class Ghcnm
extends ucar.nc2.iosp.AbstractIOServiceProvider

Nomads GLOBAL HISTORICAL CLIMATOLOGY NETWORK MONTHLY (GHCNM) v3 Beta. Ascii file. Write index into .ncsx using protobug (experimental) IOSP can then recognize the ncsx file, so it can be passed into NetdfFile.open() instead of the ascii file. Otherwise you have to explicitly specify the iosp, eg:

The index has list of stations and offsets into station file and data file. since the data file has one station's data grouped together, this efficiently answers "get all data for station". One could sort datafile by time, and add time index, to answer "get all data for time range".

 Protobuf generation:
 cd c:/dev/tds4.2/thredds/cdm/src/main/java
 protoc --proto_path=. --java_out=. ucar/nc2/iosp/noaa/GhcnmIndex.proto
 

LOOK probable file leaks

Since:

Dec 8, 2010

Field Summary

Fields inherited from class ucar.nc2.iosp.AbstractIOServiceProvider

location, raf, rafOrder

Constructor Summary

Constructors

Constructor and Description
Ghcnm()

Method Summary

Modifier and Type	Method and Description
void	close()
String	getFileTypeDescription() Get a human-readable description for this file type.
String	getFileTypeId() Get a unique stnId for this file type.
ucar.ma2.StructureDataIterator	getStructureIterator(ucar.nc2.Structure s, int bufferSize) Get the structure iterator
boolean	isValidFile(ucar.unidata.io.RandomAccessFile raf)
void	open(ucar.unidata.io.RandomAccessFile raf, ucar.nc2.NetcdfFile ncfile, ucar.nc2.util.CancelTask cancelTask)
ucar.ma2.Array	readData(ucar.nc2.Variable v2, ucar.ma2.Section section) Returns an ArraySequence, no subsetting is allowed.

Methods inherited from class ucar.nc2.iosp.AbstractIOServiceProvider

build, buildFinish, getDetailInfo, getFileTypeVersion, getLastModified, isBuilder, reacquire, readSection, readToByteChannel, readToOutputStream, release, sendIospMessage, setNetcdfFile, streamToByteChannel, syncExtend, toStringDebug

Methods inherited from class java.lang.Object

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

Constructor Detail

Ghcnm

public Ghcnm()

Method Detail

isValidFile

public boolean isValidFile(ucar.unidata.io.RandomAccessFile raf)
                    throws IOException

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface ucar.nc2.iosp.IOServiceProvider

Overrides:

close in class ucar.nc2.iosp.AbstractIOServiceProvider

Throws:

IOException

open

public void open(ucar.unidata.io.RandomAccessFile raf,
                 ucar.nc2.NetcdfFile ncfile,
                 ucar.nc2.util.CancelTask cancelTask)
          throws IOException

Specified by:

open in interface ucar.nc2.iosp.IOServiceProvider

Overrides:

open in class ucar.nc2.iosp.AbstractIOServiceProvider

Throws:

IOException

getFileTypeId

public String getFileTypeId()

Get a unique stnId for this file type.

Returns:

registered stnId of the file type

See Also:

"https://www.unidata.ucar.edu/software/netcdf-java/formats/FileTypes.html"

getFileTypeDescription

public String getFileTypeDescription()

Get a human-readable description for this file type.

Returns:

description of the file type

See Also:

"https://www.unidata.ucar.edu/software/netcdf-java/formats/FileTypes.html"

readData

public ucar.ma2.Array readData(ucar.nc2.Variable v2,
                               ucar.ma2.Section section)
                        throws IOException

Returns an ArraySequence, no subsetting is allowed.

Parameters:

v2 - a top-level Variable

section - the section of data to read. There must be a Range for each Dimension in the variable, in order. Note: no nulls allowed. IOSP may not modify.

Returns:

ArraySequence

Throws:

IOException

getStructureIterator

public ucar.ma2.StructureDataIterator getStructureIterator(ucar.nc2.Structure s,
                                                           int bufferSize)
                                                    throws IOException

Get the structure iterator

Specified by:

getStructureIterator in interface ucar.nc2.iosp.IOServiceProvider

Overrides:

getStructureIterator in class ucar.nc2.iosp.AbstractIOServiceProvider

Parameters:

s - the Structure

bufferSize - the buffersize

Returns:

the data iterator

Throws:

IOException - if problem reading data