DMR(Data Metadata Response) request processing source. More...

#include <sstream>
#include "config_hdf5.h"
#include <libdap/InternalErr.h>
#include <BESDebug.h>
#include <libdap/mime_util.h>
#include "hdf5_handler.h"
#include "HDF5Int32.h"
#include "HDF5UInt32.h"
#include "HDF5UInt16.h"
#include "HDF5Int16.h"
#include "HDF5Byte.h"
#include "HDF5Array.h"
#include "HDF5Str.h"
#include "HDF5Float32.h"
#include "HDF5Float64.h"
#include "HDF5Url.h"
#include "HDF5Structure.h"
#include "HDF5CFUtil.h"
#include "h5dmr.h"

Include dependency graph for h5dmr.cc:

Go to the source code of this file.

Functions
bool	breadth_first (const hid_t file_id, hid_t pid, const char gname, D4Group par_grp, const char *fname, bool use_dimscale, vector< link_info_t > &hdf5_hls)

string	get_hardlink_dmr (hid_t h5obj_id, const string &oname)

void	get_softlink (D4Group *par_grp, hid_t h5obj_id, const string &oname, int index, size_t val_size)

void	map_h5_attrs_to_dap4 (hid_t oid, D4Group d4g, BaseType d4b, Structure *d4s, int flag)
	A function that map HDF5 attributes to DAP4. More...

void	map_h5_dset_hardlink_to_d4 (hid_t h5_dsetid, const string &full_path, BaseType d4b, Structure d4s, int flag)

void	read_objects (D4Group *d4_grp, const string &varname, const string &filename, const hid_t dset_id)

void	read_objects_base_type (D4Group *d4_grp, const string &varname, const string &filename, hid_t dset_id)

void	read_objects_structure (D4Group *d4_grp, const string &varname, const string &filename, hid_t dset_id)

Variables
HDF5PathFinder	obj_paths
	A variable for remembering visited paths to break cyclic HDF5 groups. More...

Detailed Description

DMR(Data Metadata Response) request processing source.

This file is part of h5_dap_handler, a C++ implementation of the DAP handler for HDF5 data.

This file contains functions which use depth-first and breadth-first search to walk through an HDF5 file and build the in-memory DMR. The depth-first is for the case when HDF5 dimension scales are not used. The breadth-first is for the case when HDF5 dimension scales are used to generate an HDF5 file that follows the netCDF-4 data model. Using breadth-first ensures the

Definition in file h5dmr.cc.

Function Documentation

◆ breadth_first()

bool breadth_first	(	const hid_t	file_id,
		hid_t	pid,
		const char *	gname,
		D4Group *	par_grp,
		const char *	fname,
		bool	use_dimscale,
		vector< link_info_t > &	hdf5_hls
	)

bool breadth_first(const hid_t file_id,hid_t pid, const char gname, DMR & dmr, D4Group par_grp, const char *fname,bool use_dimscale, vector <link_info_t> & hdf5_hls)

Parameters

file_id	file_id(this is necessary for searching the hardlinks of a dataset)
pid	group id
gname	group name (the absolute path from the root group)
dmr	reference of DMR object
fname	the HDF5 file name
use_dimscale	whether dimension scales are used.
hdf5_hls	the vector to save all the hardlink info.

Returns: 0, if failed.; 1, if succeeded.

Remarks: hard link is treated as a dataset.; will return error message to the DAP interface.; The reason to use breadth_first is that the DMR representation needs to show the dimension names and the variables under the group first and then the group names. So we use this search. In the future, we may just use the breadth_first search for all cases.??

See also: depth_first(hid_t pid, char *gname, DMR & dmr, const char *fname) in h5dds.cc

To keep track of soft links.

Definition at line 321 of file h5dmr.cc.

◆ get_softlink()

get_softlink	(	D4Group *	par_grp,
		hid_t	h5obj_id,
		const string &	oname,
		int	index,
		size_t	val_size
	)

will put softlink information into DAP4.

Parameters

par_grp	DAP4 group
h5_obj_id	object id
oname	object name: absolute name of a group
index	Link index
val_size	value size

Returns: void

Remarks: In case of error, it throws an exception

Definition at line 1080 of file h5dmr.cc.

◆ map_h5_attrs_to_dap4()

void map_h5_attrs_to_dap4	(	hid_t	oid,
		D4Group *	d4g,
		BaseType *	d4b,
		Structure *	d4s,
		int	flag
	)

A function that map HDF5 attributes to DAP4.

Definition at line 868 of file h5dmr.cc.

Variable Documentation

◆ obj_paths

HDF5PathFinder obj_paths

A variable for remembering visited paths to break cyclic HDF5 groups.

Definition at line 68 of file h5dmr.cc.

Functions