/// <summary>
/// 实例化当前数据驱动
/// </summary>
/// <param name="type">驱动类型名</param>
/// <returns>当前的驱动</returns>
public static IDbProvider Instance(ModelType type)
{
DbProviderInfo providerInfo = ModelConfig.GetDbProvider(type);
string typename = providerInfo.Provider;
IDbProvider provider = AppCtx.Cache.RetrieveObject <IDbProvider>(typename);
if (provider == null)
{
string[] s = typename.Split(',');
provider = Utils.CreateInstance <IDbProvider>(s[0], s[1]);
if (provider == null)
{
throw new SystemException("不存在当前数据驱动:" + typename);
}
if (provider is CompositeProvider)
{
CompositeProvider cmp = provider as CompositeProvider;
foreach (NameType item in providerInfo.Items)
{
if (String.Compare("singletable", item.Name, true) == 0 && !GeneralConfigs.GetConfig().EnableSingleTable)
{
continue;
}
IDbProvider subProvider = AppCtx.Cache.RetrieveObject <IDbProvider>(item.Type);
if (subProvider == null)
{
subProvider = Utils.CreateInstance <IDbProvider>(item.Type);
if (subProvider != null)
{
AppCtx.Cache.AddObjectWithFileChange(item.Type, subProvider, ModelConfig.ConfigFilePath, GeneralConfigs.ConfigFile);
}
}
if (subProvider != null)
{
cmp.Add(subProvider);
}
}
}
AppCtx.Cache.AddObjectWithFileChange(typename, provider, ModelConfig.ConfigFilePath, GeneralConfigs.ConfigFile);
}
return(provider);
}