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| 1 // Copyright 2008, Google Inc. | 1 // Copyright 2008, Google Inc. |
| 2 // | 2 // |
| 3 // Redistribution and use in source and binary forms, with or without | 3 // Redistribution and use in source and binary forms, with or without |
| 4 // modification, are permitted provided that the following conditions are met: | 4 // modification, are permitted provided that the following conditions are met: |
| 5 // | 5 // |
| 6 // 1. Redistributions of source code must retain the above copyright notice, | 6 // 1. Redistributions of source code must retain the above copyright notice, |
| 7 // this list of conditions and the following disclaimer. | 7 // this list of conditions and the following disclaimer. |
| 8 // 2. Redistributions in binary form must reproduce the above copyright notice, | 8 // 2. Redistributions in binary form must reproduce the above copyright notice, |
| 9 // this list of conditions and the following disclaimer in the documentation | 9 // this list of conditions and the following disclaimer in the documentation |
| 10 // and/or other materials provided with the distribution. | 10 // and/or other materials provided with the distribution. |
| 11 // 3. Neither the name of Google Inc. nor the names of its contributors may be | 11 // 3. Neither the name of Google Inc. nor the names of its contributors may be |
| 12 // used to endorse or promote products derived from this software without | 12 // used to endorse or promote products derived from this software without |
| 13 // specific prior written permission. | 13 // specific prior written permission. |
| 14 // | 14 // |
| 15 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | 15 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 16 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | 16 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 17 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | 17 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 18 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 18 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 19 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | 19 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 20 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | 20 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 21 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | 21 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 22 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | 22 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 23 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | 23 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 24 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 24 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | 25 |
| 26 #ifndef GEARS_DATABASE2_STATEMENT_H__ | 26 #ifndef GEARS_DATABASE2_STATEMENT_H__ |
| 27 #define GEARS_DATABASE2_STATEMENT_H__ | 27 #define GEARS_DATABASE2_STATEMENT_H__ |
| 28 | |
| 29 #include <vector> | |
| 30 | 28 |
| 31 #include "gears/base/common/common.h" | 29 #include "gears/base/common/common.h" |
| 32 #include "gears/base/common/js_types.h" | 30 #include "gears/base/common/js_types.h" |
| 33 #include "gears/third_party/scoped_ptr/scoped_ptr.h" | 31 #include "gears/third_party/scoped_ptr/scoped_ptr.h" |
| 34 | 32 |
| 35 // forward declarations | 33 // forward declarations |
| 36 class Database2; | 34 class Database2; |
| 37 class Database2Transaction; | 35 class Database2Transaction; |
| 38 class Database2Values; | 36 class Database2Values; |
| 39 | 37 |
| (...skipping 26 matching lines...) Show 10 above Show 10 below | |
| 66 // if true, the statement has invalid arguments | 64 // if true, the statement has invalid arguments |
| 67 bool bogus_; | 65 bool bogus_; |
| 68 std::string16 sql_statement_; | 66 std::string16 sql_statement_; |
| 69 scoped_ptr<Database2Values> arguments_; | 67 scoped_ptr<Database2Values> arguments_; |
| 70 scoped_ptr<JsRootedCallback> callback_; | 68 scoped_ptr<JsRootedCallback> callback_; |
| 71 scoped_ptr<JsRootedCallback> error_callback_; | 69 scoped_ptr<JsRootedCallback> error_callback_; |
| 72 | 70 |
| 73 DISALLOW_EVIL_CONSTRUCTORS(Database2Statement); | 71 DISALLOW_EVIL_CONSTRUCTORS(Database2Statement); |
| 74 }; | 72 }; |
| 75 | 73 |
| 76 // Used for marshaling statement arguments to the database thread and results to | 74 // Used for marshaling statement arguments to the database thread and |
| 77 // the main thread. A union-based structure is used to store value-type pairs. | 75 // results to the main thread. |
| 76 // JsParamToSend is used to store the value-type pairs, and as a result the | |
| 77 // values are heap-allocated, which is unfortunate in the case of int/double. | |
| 78 // TODO(dimitri.glazkov): Reimplement using unions, possibly reusing or | |
| 79 // integrating with MarshaledJsToken | |
| 78 class Database2Values { | 80 class Database2Values { |
|
Aaron
2008/05/22 22:16:42
The shape of this internal class is really bugging
Dimitri
2008/05/24 02:13:40
On 2008/05/22 22:16:42, Aaron wrote:
> The shape o
| |
| 79 public: | 81 public: |
| 80 Database2Values() {} | 82 ~Database2Values(); |
| 81 ~Database2Values() { | |
| 82 // remove all rows | |
| 83 for(unsigned int i = 0; i < rows_.size(); i++) { | |
| 84 delete[] rows_[i]; | |
| 85 } | |
| 86 } | |
| 87 | 83 |
| 88 static bool CreateFromJsArray(const JsArray *js_array, | 84 static bool CreateFromJsArray(const JsArray *sql_arguments, |
| 89 Database2Values **instance); | 85 Database2Values **instance); |
| 90 | 86 |
| 91 // methods for reading values | |
| 92 int length() const { return length_; } | 87 int length() const { return length_; } |
| 93 void Reset() { current_row_ = 0; } | |
| 94 bool Next(); | |
| 95 JsParamType GetType(int index) const; | 88 JsParamType GetType(int index) const; |
| 96 bool GetElementAsInt(int index, int *value); | 89 int GetAsInt(int index) const; |
| 97 bool GetElementAsDouble(int index, double *value); | 90 double GetAsDouble(int index) const; |
| 98 bool GetElementAsString(int index, std::string16 *value); | 91 std::string16 &GetAsString(int index) const; |
| 92 private: | |
| 93 Database2Values() {} | |
| 99 | 94 |
| 100 private: | 95 static bool SetJsParamToSend(const JsArray *js_array, |
| 101 void StartNewRow(); | 96 int index, |
| 97 JsParamToSend *param); | |
| 102 | 98 |
| 103 // used to store value-type pairs | 99 scoped_array<JsParamToSend> arguments_; |
| 104 struct Variant { | |
| 105 Variant() : type(JSPARAM_NULL) {} | |
| 106 ~Variant() { | |
| 107 if (type == JSPARAM_STRING16) { delete string_value; } | |
| 108 } | |
| 109 | |
| 110 JsParamType type; | |
| 111 union { | |
| 112 int int_value; | |
| 113 double double_value; | |
| 114 std::string16 *string_value; | |
| 115 }; | |
| 116 }; | |
| 117 | |
| 118 inline Variant ¤t(int index) const { | |
| 119 assert(index >= 0 && index < length_); | |
| 120 assert(current_row_ < length_); | |
| 121 return rows_[current_row_][index]; | |
| 122 } | |
| 123 | |
| 124 friend class vector; | |
| 125 std::vector<Variant*> rows_; | |
| 126 int length_; | 100 int length_; |
| 127 int current_row_; | |
| 128 | 101 |
| 129 DISALLOW_EVIL_CONSTRUCTORS(Database2Values); | 102 DISALLOW_EVIL_CONSTRUCTORS(Database2Values); |
| 130 }; | 103 }; |
| 131 | 104 |
| 132 #endif // GEARS_DATABASE2_STATEMENT_H__ | 105 #endif // GEARS_DATABASE2_STATEMENT_H__ |
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