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comparison Resources/Orthanc/Plugins/Samples/Common/SimplifiedOrthancDataset.cpp @ 31:9aace933cb64

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sharing code with the Orthanc core
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 16 Dec 2016 15:41:20 +0100
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30:1099a148f7e5 31:9aace933cb64
1 /**
2 * Orthanc - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
4 * Department, University Hospital of Liege, Belgium
5 *
6 * This program is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
10 *
11 * In addition, as a special exception, the copyright holders of this
12 * program give permission to link the code of its release with the
13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
14 * that use the same license as the "OpenSSL" library), and distribute
15 * the linked executables. You must obey the GNU General Public License
16 * in all respects for all of the code used other than "OpenSSL". If you
17 * modify file(s) with this exception, you may extend this exception to
18 * your version of the file(s), but you are not obligated to do so. If
19 * you do not wish to do so, delete this exception statement from your
20 * version. If you delete this exception statement from all source files
21 * in the program, then also delete it here.
22 *
23 * This program is distributed in the hope that it will be useful, but
24 * WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
26 * General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 **/
31
32
33 #include "SimplifiedOrthancDataset.h"
34
35 #include "OrthancPluginException.h"
36
37 namespace OrthancPlugins
38 {
39 const Json::Value* SimplifiedOrthancDataset::LookupPath(const DicomPath& path) const
40 {
41 const Json::Value* content = &root_;
42
43 for (unsigned int depth = 0; depth < path.GetPrefixLength(); depth++)
44 {
45 const char* name = path.GetPrefixTag(depth).GetName();
46 if (content->type() != Json::objectValue)
47 {
48 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
49 }
50
51 if (!content->isMember(name))
52 {
53 return NULL;
54 }
55
56 const Json::Value& sequence = (*content) [name];
57 if (sequence.type() != Json::arrayValue)
58 {
59 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
60 }
61
62 size_t index = path.GetPrefixIndex(depth);
63 if (index >= sequence.size())
64 {
65 return NULL;
66 }
67 else
68 {
69 content = &sequence[static_cast<Json::Value::ArrayIndex>(index)];
70 }
71 }
72
73 const char* name = path.GetFinalTag().GetName();
74
75 if (content->type() != Json::objectValue)
76 {
77 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
78 }
79 if (!content->isMember(name))
80 {
81 return NULL;
82 }
83 else
84 {
85 return &((*content) [name]);
86 }
87 }
88
89
90 void SimplifiedOrthancDataset::CheckRoot() const
91 {
92 if (root_.type() != Json::objectValue)
93 {
94 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
95 }
96 }
97
98
99 SimplifiedOrthancDataset::SimplifiedOrthancDataset(IOrthancConnection& orthanc,
100 const std::string& uri)
101 {
102 IOrthancConnection::RestApiGet(root_, orthanc, uri);
103 CheckRoot();
104 }
105
106
107 SimplifiedOrthancDataset::SimplifiedOrthancDataset(const std::string& content)
108 {
109 IOrthancConnection::ParseJson(root_, content);
110 CheckRoot();
111 }
112
113
114 bool SimplifiedOrthancDataset::GetStringValue(std::string& result,
115 const DicomPath& path) const
116 {
117 const Json::Value* value = LookupPath(path);
118
119 if (value == NULL)
120 {
121 return false;
122 }
123 else if (value->type() != Json::stringValue)
124 {
125 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
126 }
127 else
128 {
129 result = value->asString();
130 return true;
131 }
132 }
133
134
135 bool SimplifiedOrthancDataset::GetSequenceSize(size_t& size,
136 const DicomPath& path) const
137 {
138 const Json::Value* sequence = LookupPath(path);
139
140 if (sequence == NULL)
141 {
142 // Inexistent path
143 return false;
144 }
145 else if (sequence->type() != Json::arrayValue)
146 {
147 // Not a sequence
148 ORTHANC_PLUGINS_THROW_EXCEPTION(BadFileFormat);
149 }
150 else
151 {
152 size = sequence->size();
153 return true;
154 }
155 }
156 }