Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLResult.cpp @ 140:4cd7e45b671e
upgrade to year 2020
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Fri, 31 Jan 2020 17:24:29 +0100 |
| parents | 5765cc5fd268 |
| children | 063aa53b5917 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
|
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5 * Copyright (C) 2017-2020 Osimis S.A., Belgium |
| 0 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
|
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22 #include "PostgreSQLIncludes.h" // Must be the first |
| 105 | 23 #include "PostgreSQLResult.h" |
| 0 | 24 |
| 25 #include "../Common/BinaryStringValue.h" | |
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26 #include "../Common/FileValue.h" |
| 0 | 27 #include "../Common/Integer64Value.h" |
| 28 #include "../Common/NullValue.h" | |
| 29 #include "../Common/Utf8StringValue.h" | |
| 30 | |
| 31 #include <Core/OrthancException.h> | |
| 32 #include <Core/Logging.h> | |
| 103 | 33 #include <Core/Endianness.h> |
| 0 | 34 |
| 35 #include <cassert> | |
| 36 #include <boost/lexical_cast.hpp> | |
| 37 | |
| 38 | |
| 39 namespace OrthancDatabases | |
| 40 { | |
| 41 void PostgreSQLResult::Clear() | |
| 42 { | |
| 43 if (result_ != NULL) | |
| 44 { | |
| 45 PQclear(reinterpret_cast<PGresult*>(result_)); | |
| 46 result_ = NULL; | |
| 47 } | |
| 48 } | |
| 49 | |
| 50 | |
| 51 void PostgreSQLResult::CheckDone() | |
| 52 { | |
| 53 if (position_ >= PQntuples(reinterpret_cast<PGresult*>(result_))) | |
| 54 { | |
| 55 // We are at the end of the result set | |
| 56 Clear(); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 | |
| 61 void PostgreSQLResult::CheckColumn(unsigned int column, unsigned int /*Oid*/ expectedType) const | |
| 62 { | |
| 63 if (IsDone()) | |
| 64 { | |
| 65 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
| 66 } | |
| 67 | |
| 68 if (column >= static_cast<unsigned int>(PQnfields(reinterpret_cast<PGresult*>(result_)))) | |
| 69 { | |
| 70 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange); | |
| 71 } | |
| 72 | |
| 73 if (expectedType != 0 && | |
| 74 expectedType != PQftype(reinterpret_cast<PGresult*>(result_), column)) | |
| 75 { | |
| 76 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 | |
| 81 PostgreSQLResult::PostgreSQLResult(PostgreSQLStatement& statement) : | |
| 82 position_(0), | |
| 83 database_(statement.GetDatabase()) | |
| 84 { | |
| 85 result_ = statement.Execute(); | |
| 86 assert(result_ != NULL); // An exception would have been thrown otherwise | |
| 87 | |
| 88 // This is the first call to "Next()" | |
| 89 if (PQresultStatus(reinterpret_cast<PGresult*>(result_)) == PGRES_TUPLES_OK) | |
| 90 { | |
| 91 CheckDone(); | |
| 92 columnsCount_ = static_cast<unsigned int>(PQnfields(reinterpret_cast<PGresult*>(result_))); | |
| 93 } | |
| 94 else | |
| 95 { | |
| 96 // This is not a SELECT request, we're done | |
| 97 Clear(); | |
| 98 columnsCount_ = 0; | |
| 99 } | |
| 100 } | |
| 101 | |
| 102 | |
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103 PostgreSQLResult::~PostgreSQLResult() |
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104 { |
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105 try |
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106 { |
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107 Clear(); |
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108 } |
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109 catch (Orthanc::OrthancException&) |
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110 { |
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111 // Ignore possible exceptions due to connection loss |
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112 } |
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113 } |
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114 |
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115 |
| 0 | 116 void PostgreSQLResult::Next() |
| 117 { | |
| 118 position_++; | |
| 119 CheckDone(); | |
| 120 } | |
| 121 | |
| 122 | |
| 123 bool PostgreSQLResult::IsNull(unsigned int column) const | |
| 124 { | |
| 125 CheckColumn(column, 0); | |
| 126 return PQgetisnull(reinterpret_cast<PGresult*>(result_), position_, column) != 0; | |
| 127 } | |
| 128 | |
| 129 | |
| 130 bool PostgreSQLResult::GetBoolean(unsigned int column) const | |
| 131 { | |
| 132 CheckColumn(column, BOOLOID); | |
| 133 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 1); | |
| 134 const uint8_t *v = reinterpret_cast<const uint8_t*> | |
| 135 (PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column)); | |
| 136 return (v[0] != 0); | |
| 137 } | |
| 138 | |
| 139 | |
| 140 int PostgreSQLResult::GetInteger(unsigned int column) const | |
| 141 { | |
| 142 CheckColumn(column, INT4OID); | |
| 143 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 4); | |
| 144 char *v = PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
| 145 return htobe32(*reinterpret_cast<int32_t*>(v)); | |
| 146 } | |
| 147 | |
| 148 | |
| 149 int64_t PostgreSQLResult::GetInteger64(unsigned int column) const | |
| 150 { | |
| 151 CheckColumn(column, INT8OID); | |
| 152 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == 8); | |
| 153 char *v = PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
| 154 return htobe64(*reinterpret_cast<int64_t*>(v)); | |
| 155 } | |
| 156 | |
| 157 | |
| 158 std::string PostgreSQLResult::GetString(unsigned int column) const | |
| 159 { | |
| 160 CheckColumn(column, 0); | |
| 161 | |
| 162 Oid oid = PQftype(reinterpret_cast<PGresult*>(result_), column); | |
| 163 if (oid != TEXTOID && oid != VARCHAROID && oid != BYTEAOID) | |
| 164 { | |
| 165 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadParameterType); | |
| 166 } | |
| 167 | |
| 168 return std::string(PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column)); | |
| 169 } | |
| 170 | |
| 171 | |
| 172 void PostgreSQLResult::GetLargeObject(std::string& result, | |
| 173 unsigned int column) const | |
| 174 { | |
| 175 CheckColumn(column, OIDOID); | |
| 176 | |
| 177 Oid oid; | |
| 178 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == sizeof(oid)); | |
| 179 | |
| 180 oid = *(const Oid*) PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
| 181 oid = ntohl(oid); | |
| 182 | |
| 183 PostgreSQLLargeObject::Read(result, database_, boost::lexical_cast<std::string>(oid)); | |
| 184 } | |
| 185 | |
| 186 | |
| 187 void PostgreSQLResult::GetLargeObject(void*& result, | |
| 188 size_t& size, | |
| 189 unsigned int column) const | |
| 190 { | |
| 191 CheckColumn(column, OIDOID); | |
| 192 | |
| 193 Oid oid; | |
| 194 assert(PQfsize(reinterpret_cast<PGresult*>(result_), column) == sizeof(oid)); | |
| 195 | |
| 196 oid = *(const Oid*) PQgetvalue(reinterpret_cast<PGresult*>(result_), position_, column); | |
| 197 oid = ntohl(oid); | |
| 198 | |
| 199 PostgreSQLLargeObject::Read(result, size, database_, boost::lexical_cast<std::string>(oid)); | |
| 200 } | |
| 201 | |
| 202 | |
| 203 IValue* PostgreSQLResult::GetValue(unsigned int column) const | |
| 204 { | |
| 205 if (IsNull(column)) | |
| 206 { | |
| 207 return new NullValue; | |
| 208 } | |
| 209 | |
| 210 Oid type = PQftype(reinterpret_cast<PGresult*>(result_), column); | |
| 211 | |
| 212 switch (type) | |
| 213 { | |
| 214 case BOOLOID: | |
| 215 // Convert Boolean values as integers | |
| 216 return new Integer64Value(GetBoolean(column) ? 1 : 0); | |
| 217 | |
| 218 case INT4OID: | |
| 219 return new Integer64Value(GetInteger(column)); | |
| 220 | |
| 221 case INT8OID: | |
| 222 return new Integer64Value(GetInteger64(column)); | |
| 223 | |
| 224 case TEXTOID: | |
| 225 case VARCHAROID: | |
| 226 return new Utf8StringValue(GetString(column)); | |
| 227 | |
| 228 case BYTEAOID: | |
| 229 return new BinaryStringValue(GetString(column)); | |
| 230 | |
| 231 case OIDOID: | |
| 232 { | |
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233 std::auto_ptr<FileValue> value(new FileValue); |
| 0 | 234 GetLargeObject(value->GetContent(), column); |
| 235 return value.release(); | |
| 236 } | |
| 237 | |
| 238 default: | |
| 239 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); | |
| 240 } | |
| 241 } | |
| 242 } |