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131 lines
4.0 KiB
Markdown
131 lines
4.0 KiB
Markdown
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## data\_writer\_factory\_t
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### 概述
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data writer工厂。
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----------------------------------
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### 函数
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<p id="data_writer_factory_t_methods">
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| 函数名称 | 说明 |
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| -------- | ------------ |
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| <a href="#data_writer_factory_t_data_writer_factory">data\_writer\_factory</a> | 获取缺省的data writer工厂对象。 |
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| <a href="#data_writer_factory_t_data_writer_factory_create">data\_writer\_factory\_create</a> | 创建data writer工厂对象。 |
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| <a href="#data_writer_factory_t_data_writer_factory_create_writer">data\_writer\_factory\_create\_writer</a> | 创建指定类型的data writer对象。 |
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| <a href="#data_writer_factory_t_data_writer_factory_destroy">data\_writer\_factory\_destroy</a> | 析构并释放data writer工厂对象。 |
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| <a href="#data_writer_factory_t_data_writer_factory_register">data\_writer\_factory\_register</a> | 注册data writer创建函数。 |
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| <a href="#data_writer_factory_t_data_writer_factory_set">data\_writer\_factory\_set</a> | 设置缺省的data writer工厂对象。 |
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#### data\_writer\_factory 函数
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-----------------------
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* 函数功能:
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> <p id="data_writer_factory_t_data_writer_factory">获取缺省的data writer工厂对象。
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* 函数原型:
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```
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data_writer_factory_t* data_writer_factory ();
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```
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* 参数说明:
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | data\_writer\_factory\_t* | 返回data writer工厂对象。 |
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#### data\_writer\_factory\_create 函数
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-----------------------
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* 函数功能:
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> <p id="data_writer_factory_t_data_writer_factory_create">创建data writer工厂对象。
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* 函数原型:
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```
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data_writer_factory_t* data_writer_factory_create ();
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```
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* 参数说明:
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | data\_writer\_factory\_t* | 返回data writer工厂对象。 |
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#### data\_writer\_factory\_create\_writer 函数
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-----------------------
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* 函数功能:
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> <p id="data_writer_factory_t_data_writer_factory_create_writer">创建指定类型的data writer对象。
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* 函数原型:
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```
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data_writer_t* data_writer_factory_create_writer (data_writer_factory_t* factory, const char* url);
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```
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* 参数说明:
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | data\_writer\_t* | 返回data writer对象。 |
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| factory | data\_writer\_factory\_t* | data writer工厂对象。 |
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| url | const char* | URL。 |
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#### data\_writer\_factory\_destroy 函数
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-----------------------
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* 函数功能:
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> <p id="data_writer_factory_t_data_writer_factory_destroy">析构并释放data writer工厂对象。
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* 函数原型:
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```
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ret_t data_writer_factory_destroy (data_writer_factory_t* factory);
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```
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* 参数说明:
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | ret\_t | 返回RET\_OK表示成功,否则表示失败。 |
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| factory | data\_writer\_factory\_t* | data writer工厂对象。 |
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#### data\_writer\_factory\_register 函数
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-----------------------
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* 函数功能:
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> <p id="data_writer_factory_t_data_writer_factory_register">注册data writer创建函数。
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* 函数原型:
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```
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ret_t data_writer_factory_register (data_writer_factory_t* factory, const char* protocol, data_writer_create_t create);
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```
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* 参数说明:
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | ret\_t | 返回RET\_OK表示成功,否则表示失败。 |
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| factory | data\_writer\_factory\_t* | writer工厂对象。 |
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| protocol | const char* | 协议(如file)。 |
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| create | data\_writer\_create\_t | data writer创建函数。 |
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#### data\_writer\_factory\_set 函数
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-----------------------
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* 函数功能:
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> <p id="data_writer_factory_t_data_writer_factory_set">设置缺省的data writer工厂对象。
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* 函数原型:
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```
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ret_t data_writer_factory_set (data_writer_factory_t* factory);
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```
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* 参数说明:
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| 参数 | 类型 | 说明 |
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| -------- | ----- | --------- |
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| 返回值 | ret\_t | 返回RET\_OK表示成功,否则表示失败。 |
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| factory | data\_writer\_factory\_t* | data writer工厂对象。 |
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