/// <summary>
/// Builds a Mapped Statement for a statement.
/// </summary>
/// <param name="statement">The statement.</param>
/// <param name="mappedStatement">The mapped statement.</param>
/// <returns></returns>
private IMappedStatement BuildCachingStatement(IStatement statement, MappedStatement mappedStatement)
{
IMappedStatement mapStatement = mappedStatement;
if (statement.CacheModel != null && isCacheModelsEnabled)
{
mapStatement = new CachingStatement(mappedStatement);
}
return mapStatement;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="statement"></param>
public CachingStatement(MappedStatement statement)
{
mappedStatement = statement;
}
/// <summary>
/// Builds an <see cref="Procedure"/> for a procedure configuration.
/// </summary>
/// <param name="statementConfig">The statement config.</param>
/// <param name="configurationSetting"></param>
private IMappedStatement BuildProcedure(IConfiguration statementConfig, ConfigurationSetting configurationSetting)
{
BaseStatementDeSerializer procedureDeSerializer = new ProcedureDeSerializer();
IStatement statement = procedureDeSerializer.Deserialize(modelStore, statementConfig, configurationSetting);
ProcessSqlStatement(statementConfig, statement);
MappedStatement mappedStatement = new MappedStatement(modelStore, statement);
return BuildCachingStatement(statement, mappedStatement);
}
/// <summary>
/// Builds an <see cref="Insert"/> for a insert configuration.
/// </summary>
/// <param name="statementConfig">The statement config.</param>
/// <param name="configurationSetting"></param>
private IMappedStatement BuildInsert(IConfiguration statementConfig, ConfigurationSetting configurationSetting)
{
BaseStatementDeSerializer insertDeSerializer = new InsertDeSerializer();
IStatement statement = insertDeSerializer.Deserialize(modelStore, statementConfig, configurationSetting);
ProcessSqlStatement(statementConfig, statement);
MappedStatement mappedStatement = new InsertMappedStatement(modelStore, statement);
Insert insert = (Insert)statement;
if (insert.SelectKey != null)
{
ConfigurationCollection selectKeys = statementConfig.Children.Find(ConfigConstants.ELEMENT_SELECTKEY);
IConfiguration selectKeyConfig = selectKeys[0];
ProcessSqlStatement(selectKeyConfig, insert.SelectKey);
MappedStatement mapStatement = new MappedStatement(modelStore, insert.SelectKey);
modelStore.AddMappedStatement(mapStatement);
}
return BuildCachingStatement(statement, mappedStatement);
}
/// <summary>
/// Builds a <see cref="Statement"/> for a statement configuration.
/// </summary>
/// <param name="statementConfig">The statement config.</param>
/// <param name="configurationSetting"></param>
private IMappedStatement BuildStatement(IConfiguration statementConfig, ConfigurationSetting configurationSetting)
{
BaseStatementDeSerializer statementDeSerializer = new StatementDeSerializer();
//解析statement节点属性到类中
IStatement statement = statementDeSerializer.Deserialize(modelStore, statementConfig, configurationSetting);
//估计是处理statement节点对应的文本内容 ----->确实如此 此处是个核心 一个statement节点的配置信息 和 对应的内存类
//处理的结果放在了statement中 包括了要执行的sql语句和参数
ProcessSqlStatement(statementConfig, statement);
//具体封装了IDbcommand IDataReader的一些类
MappedStatement mappedStatement = new MappedStatement(modelStore, statement);
//放入缓存类中 并返回mappedStatement
return BuildCachingStatement(statement, mappedStatement);
}