/// <summary>
/// 生成查询过滤。
/// </summary>
/// <param name="queryFilter">查询过来器实例。</param>
/// <param name="parameters">查询参数</param>
/// <returns></returns>
public String GenerateFilter <TEntity>(QueryFilter queryFilter, DynamicParameters parameters)
{
if (queryFilter != null)
{
SingleQueryFilter sqf = queryFilter as SingleQueryFilter;
if (sqf != null)
{
return(this.GenerateSingleFilter <TEntity>(sqf, parameters));
}
CombinedQueryFilter cqf = queryFilter as CombinedQueryFilter;
if (cqf != null)
{
return(GenerateCombinedFilter <TEntity>(cqf, parameters));
}
}
return(null);
}
private string GenerateCombinedFilter <TEntity>(CombinedQueryFilter queryFilter, DynamicParameters parameters)
{
string spliter = queryFilter.Clause == BooleanClause.Or ? " OR " : " AND ";
string left = this.GenerateFilter <TEntity>(queryFilter.Filter1, parameters);
string right = this.GenerateFilter <TEntity>(queryFilter.Filter2, parameters);
if (!right.IsNullOrWhiteSpace())
{
if (left.IsNullOrWhiteSpace())
{
return(right);
}
else
{
return($"({left}) {spliter} ({right})");
}
}
else
{
return(left.IfNullOrWhiteSpace(String.Empty));
}
}