bes Updated for version 3.20.13
HDF5Str.cc
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1// This file is part of hdf5_handler a HDF5 file handler for the OPeNDAP
2// data server.
3
4// Author: Hyo-Kyung Lee <hyoklee@hdfgroup.org> and Muqun Yang
5// <myang6@hdfgroup.org>
6
7// Copyright (c) 2009-2016 The HDF Group, Inc. and OPeNDAP, Inc.
8//
9// This is free software; you can redistribute it and/or modify it under the
10// terms of the GNU Lesser General Public License as published by the Free
11// Software Foundation; either version 2.1 of the License, or (at your
12// option) any later version.
13//
14// This software is distributed in the hope that it will be useful, but
15// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17// License for more details.
18//
19// You should have received a copy of the GNU Lesser General Public
20// License along with this library; if not, write to the Free Software
21// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22//
23// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
24// You can contact The HDF Group, Inc. at 1800 South Oak Street,
25// Suite 203, Champaign, IL 61820
26
40
41
42#include "config_hdf5.h"
43
44
45#include <string>
46#include <ctype.h>
47
48#include <libdap/InternalErr.h>
49
50#include "h5dds.h"
51#include "HDF5Str.h"
52#include "BESDebug.h"
53
54using namespace std;
55using namespace libdap;
56
57HDF5Str::HDF5Str(const string & n, const string &vpath, const string &d)
58 : Str(n,d),var_path(vpath)
59{
60}
61
63{
64 return new HDF5Str(*this);
65}
66
68{
69
70 if (read_p())
71 return true;
72
73 hid_t file_id = H5Fopen(dataset().c_str(),H5F_ACC_RDONLY,H5P_DEFAULT);
74 if(file_id < 0) {
75 throw InternalErr(__FILE__,__LINE__, "Fail to obtain the HDF5 file ID .");
76 }
77
78 hid_t dset_id = -1;
79 if(true == is_dap4())
80 dset_id = H5Dopen2(file_id,var_path.c_str(),H5P_DEFAULT);
81 else
82 dset_id = H5Dopen2(file_id,name().c_str(),H5P_DEFAULT);
83
84 if(dset_id < 0) {
85 H5Fclose(file_id);
86 throw InternalErr(__FILE__,__LINE__, "Fail to obtain the datatype .");
87 }
88
89 hid_t dtypeid = H5Dget_type(dset_id);
90 if(dtypeid < 0) {
91 H5Dclose(dset_id);
92 H5Fclose(file_id);
93 throw InternalErr(__FILE__,__LINE__, "Fail to obtain the datatype .");
94 }
95
96 size_t size = H5Tget_size(dtypeid);
97
98 if (size == 0) {
99 H5Tclose(dtypeid);
100 H5Dclose(dset_id);
101 H5Fclose(file_id);
102 throw InternalErr(__FILE__, __LINE__, "cannot return the size of datatype");
103 }
104 try {
105
106 if(H5Tis_variable_str(dtypeid) >0){
107 vector<string>finstrval;
108 finstrval.resize(1);
109 read_vlen_string(dset_id,1,nullptr,nullptr,nullptr,finstrval);
110 string strval = finstrval[0];
111 set_value(strval);
112 }
113
114 else {
115 vector<char>chr;
116 chr.resize(size+1);
117 get_data(dset_id, (void *) chr.data());
118 set_read_p(true);
119 string str(chr.begin(),chr.end());
120 set_value(str);
121 }
122 H5Tclose(dtypeid);
123 H5Dclose(dset_id);
124 H5Fclose(file_id);
125
126 }
127
128 catch(...) {
129 H5Tclose(dtypeid);
130 H5Dclose(dset_id);
131 H5Fclose(file_id);
132 throw;
133 }
134
135
136 return true;
137}
138
This class that translates HDF5 string into DAP string for the default option.
bool read() override
Reads HDF5 string data into local buffer
Definition: HDF5Str.cc:67
libdap::BaseType * ptr_duplicate() override
Definition: HDF5Str.cc:62
HDF5Str(const std::string &n, const std::string &vpath, const std::string &d)
Constructor.
Definition: HDF5Str.cc:57
void get_data(hid_t dset, void *buf)
Definition: h5common.cc:50
Data structure and retrieval processing header for the default option.