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1 /**
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2 * Python plugin for Orthanc
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3 * Copyright (C) 2017-2020 Osimis S.A., Belgium
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4 *
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5 * This program is free software: you can redistribute it and/or
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6 * modify it under the terms of the GNU Affero General Public License
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7 * as published by the Free Software Foundation, either version 3 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful, but
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Affero General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Affero General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 **/
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18
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19
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20 #include "PythonObject.h"
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21
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22
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23 #include "PythonLock.h"
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24
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25 #include <OrthancPluginCppWrapper.h>
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26
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27
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28 PythonObject::PythonObject(PythonLock& lock,
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29 PyObject *object,
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30 bool borrowed) :
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31 lock_(lock),
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32 object_(object),
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33 borrowed_(borrowed)
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34 {
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35 }
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36
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37
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38 PythonObject::~PythonObject()
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39 {
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40 if (!borrowed_ &&
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41 object_ != NULL)
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42 {
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43 Py_DECREF(object_);
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44 }
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45 }
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46
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47
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48 PyObject* PythonObject::GetPyObject() const
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49 {
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50 if (object_ == NULL)
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51 {
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52 // "IsValid()" should have been called
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53 ORTHANC_PLUGINS_THROW_EXCEPTION(BadSequenceOfCalls);
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54 }
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55 else
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56 {
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57 return object_;
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58 }
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59 }
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60
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61
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62 PythonObject* PythonObject::GetAttribute(const std::string& name)
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63 {
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64 return new PythonObject(lock_, PyObject_GetAttrString(GetPyObject(), name.c_str()));
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65 }
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66
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67
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68 bool PythonObject::ToUtf8String(std::string& target)
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69 {
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70 PyObject* value = GetPyObject(); // Raises an exception if needed
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71
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72 if (PyUnicode_Check(value))
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73 {
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74 PythonObject encoded(lock_, PyUnicode_AsEncodedString(value, "utf-8", "replace"));
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75 if (encoded.IsValid())
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76 {
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77 target = PyBytes_AS_STRING(encoded.GetPyObject());
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78 return true;
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79 }
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80 else
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81 {
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82 target.clear();
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83 return false;
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84 }
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85 }
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86 #if PY_MAJOR_VERSION == 2
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87 else if (PyString_Check(value))
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88 {
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89 target = PyString_AS_STRING(value);
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90 return true;
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91 }
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92 #endif
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93 else
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94 {
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95 target.clear();
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96 return false;
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97 }
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98 }
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99
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100
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101 void PythonObject::Format(std::ostream& os)
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102 {
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103 std::string s;
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104 if (object_ == NULL)
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105 {
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106 os << "Can't format a NULL Python object" << std::endl;
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107 }
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108 else if (ToUtf8String(s))
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109 {
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110 os << s;
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111 }
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112 else
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113 {
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114 os << "Can't format this Python object" << std::endl;
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115 }
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116 }
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117
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118
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119 PyObject* PythonObject::Release()
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120 {
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121 if (!borrowed_ &&
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122 object_ != NULL)
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123 {
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124 PyObject* value = object_;
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125 object_ = NULL;
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126 return value;
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127 }
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128 else
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129 {
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130 OrthancPlugins::LogError("Cannot release a NULL or borrowed reference");
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131 ORTHANC_PLUGINS_THROW_EXCEPTION(InternalError);
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132 }
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133 }
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134
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