object QueryChildrenFieldPre_Extend(NoSQL.Condition item, string name)
{
if (item.Children.Count < 2)
{
return(null);
}
return(item.Children.Find(p => string.Equals(p.Name, name, System.StringComparison.OrdinalIgnoreCase))?.Children[0].Value);
}
/// <summary>
/// 查询规则（NoSQL）子集自动处理值。
/// </summary>
/// <param name="item">规则</param>
/// <param name="writer">输出对象</param>
protected virtual void QueryChildrenAutoValue(NoSQL.Condition item, System.IO.TextWriter writer)
{
if (item.Children.Count > 0)
{
//throw new System.NotSupportedException("暂不支持 NoSQL.Condition 多级字段:"+item.Name);
QueryChildren(item.Children, writer);
}
else
{
writer.Write(AddCommandParameter(item.Value));
}
}
/// <summary>
/// 查询规则（NoSQL）。
/// </summary>
/// <param name="condition">规则</param>
/// <param name="filter">过滤器</param>
/// <returns></returns>
public virtual ISelectCommandBuilder Query(NoSQL.Condition condition, CommandQueryFilterDelegate filter = null)
{
if (condition == null || condition.Type != NoSQL.ConditionTypes.Root || condition.Children.Count == 0)
{
return(this);
}
if (filter != null && !filter(this, condition))
{
return(this);
}
_whereExpression?.Query(condition);
return(this);
}
/// <summary>
/// 查询规则（NoSQL）。
/// </summary>
/// <param name="condition">规则</param>
/// <returns></returns>
public virtual IWhereExpression Query(NoSQL.Condition condition)
{
if (condition == null || condition.Type != NoSQL.ConditionTypes.Root || condition.Children.Count == 0)
{
return(this);
}
if (condition.Children.Count == 0)
{
return(this);
}
System.Text.StringBuilder builder = new System.Text.StringBuilder();
using (System.IO.StringWriter writer = new System.IO.StringWriter(builder)) {
QueryChildren(condition.Children, writer);
writer.Flush();
}
if (builder.Length > 0)
{
string commandText = builder.ToString();
lb_Next:
bool b = false;
if (!string.IsNullOrEmpty(commandText))
{
if (commandText.StartsWith(" and (", System.StringComparison.OrdinalIgnoreCase))
{
b = true;
commandText = commandText.Substring(6, commandText.Length - 8);
}
if (commandText.StartsWith(" or (", System.StringComparison.OrdinalIgnoreCase))
{
b = true;
commandText = commandText.Substring(5, commandText.Length - 7);
}
if (b)
{
goto lb_Next;
}
}
if (!string.IsNullOrEmpty(commandText))
{
Where(WhereOperators.And, " ( " + commandText + " ) ");
}
}
return(this);
}
/// <summary>
/// 查询规则（NoSQL）子集数组。
/// </summary>
/// <param name="item">规则</param>
/// <param name="format">格式串</param>
/// <param name="writer">输出对象</param>
protected virtual void QueryChildrenArray(NoSQL.Condition item, string format, System.IO.TextWriter writer)
{
System.Text.StringBuilder builder = new System.Text.StringBuilder();
foreach (object value in (System.Collections.IEnumerable)item.Value)
{
if (value == null || (value is string && (string)value == ""))
{
continue;
}
if (builder.Length > 0)
{
builder.Append(',');
}
builder.Append(AddCommandParameter(value));
}
if (builder.Length == 0)
{
return;
}
writer.Write(format, builder.ToString());
}
/// <summary>
/// 查询规则（NoSQL）子集逻辑操作。
/// </summary>
/// <param name="item">规则</param>
/// <param name="writer">输出对象</param>
/// <param name="innerOperation">内联操作符</param>
protected void QueryChildrenLogical(NoSQL.Condition item, System.IO.TextWriter writer, string innerOperation)
{
switch (item.Name)
{
case "$eq": {
writer.Write(_dialect.MatchOperatorGrammar("="));
QueryChildrenAutoValue(item, writer);
break;
}
case "$gt": {
writer.Write(_dialect.MatchOperatorGrammar(">"));
QueryChildrenAutoValue(item, writer);
break;
}
case "$gteq": {
writer.Write(_dialect.MatchOperatorGrammar(">="));
QueryChildrenAutoValue(item, writer);
break;
}
case "$lt": {
writer.Write(_dialect.MatchOperatorGrammar("<"));
QueryChildrenAutoValue(item, writer);
break;
}
case "$lteq": {
writer.Write(_dialect.MatchOperatorGrammar("<="));
QueryChildrenAutoValue(item, writer);
break;
}
case "$noteq": {
writer.Write(_dialect.MatchOperatorGrammar("!="));
QueryChildrenAutoValue(item, writer);
break;
}
case "$like":
case "$start":
case "$end":
break;
//case "$like": {
// string value = item.Value as string;
// writer.Write(LikeGrammar(item.Parent.Name,false),
// AddCommandParameter(LikeValueFilter(value, true, true)));
// break;
// }
//case "$start": {
// string value = item.Value as string;
// writer.Write(LikeGrammar(item.Parent.Name, false),
// AddCommandParameter(LikeValueFilter(value, false, true)));
// break;
// }
//case "$end": {
// string value = item.Value as string;
// writer.Write(LikeGrammar(item.Parent.Name, false),
// AddCommandParameter(LikeValueFilter(value, true, false)));
// break;
// }
case "$null": {
writer.Write(" is null");
break;
}
case "$in": {
QueryChildrenArray(item, " in({0})", writer);
break;
}
case "$notin": {
QueryChildrenArray(item, " not in({0})", writer);
break;
}
case "$and": {
writer.Write(" and (");
QueryChildren(item.Children, writer);
writer.Write(") ");
break;
}
case "$or": {
if (item.Children.IsArray)
{
writer.Write(" and (");
QueryChildren(item.Children, writer, " or ");
writer.Write(") ");
}
else
{
writer.Write(" or (");
QueryChildren(item.Children, writer);
writer.Write(") ");
}
break;
}
case "$not": {
writer.Write(" not (");
QueryChildren(item.Children, writer);
writer.Write(") ");
break;
}
case "$min":
case "$max":
case "$sum":
case "$count": {
break;
}
default:
throw new System.NotSupportedException("暂不支持NoSQL.Condition.Name=" + item.Name);
}
}
/// <summary>
/// 查询规则（NoSQL）子集字段预处理。
/// </summary>
/// <param name="item">规则</param>
/// <param name="writer">输出对象</param>
/// <param name="innerOperation">内联操作符</param>
/// <param name="firstOperation">第一个操作</param>
/// <returns>返加是否处理。</returns>
protected virtual bool QueryChildrenFieldPre(NoSQL.Condition item, System.IO.TextWriter writer, string innerOperation, ref bool firstOperation)
{
switch (item.Children[0].Name)
{
case "$min":
case "$max":
case "$sum":
case "$count": {
if (item.Children.Count != 1)
{
return(false);
}
writer.Write("{0}({1})", item.Children[0].Name.Substring(1), _dialect.PreName(item.GetNames()));
QueryChildren(item.Children[0].Children, writer);
return(true);
}
case "$notnull": {
if (item.Children.Count != 1)
{
return(false);
}
firstOperation = false;
writer.Write(innerOperation);
writer.Write("not {0} is null", _dialect.PreName(item.GetNames()));
return(true);
}
case "$ref": {
if (item.Children.Count != 1)
{
return(false);
}
firstOperation = false;
writer.Write(innerOperation);
writer.Write("{0}={1}", _dialect.PreName(item.GetNames()), _dialect.PreName(item.Children[0].Value as string, "."));
return(true);
}
case "$like": {
string value = item.Children[0].Value as string;
if (string.IsNullOrEmpty(value))
{
return(true);
}
else
{
firstOperation = false;
writer.Write(innerOperation);
bool reverse = TypeExtensions.Convert(QueryChildrenFieldPre_Extend(item, "reverse"), false);
writer.Write(_dialect.LikeGrammar(_dialect.PreName(item.GetNames()), true, true, reverse),
AddCommandParameter(_dialect.LikeValueFilter(value, true, true, reverse)));
return(true);
}
}
case "$start": {
string value = item.Children[0].Value as string;
if (string.IsNullOrEmpty(value))
{
return(true);
}
else
{
firstOperation = false;
writer.Write(innerOperation);
bool reverse = TypeExtensions.Convert(QueryChildrenFieldPre_Extend(item, "reverse"), false);
writer.Write(_dialect.LikeGrammar(_dialect.PreName(item.GetNames()), false, true, reverse),
AddCommandParameter(_dialect.LikeValueFilter(value, false, true, reverse)));
return(true);
}
}
case "$end": {
string value = item.Children[0].Value as string;
if (string.IsNullOrEmpty(value))
{
return(true);
}
else
{
firstOperation = false;
writer.Write(innerOperation);
bool reverse = TypeExtensions.Convert(QueryChildrenFieldPre_Extend(item, "reverse"), false);
writer.Write(_dialect.LikeGrammar(_dialect.PreName(item.GetNames()), true, false, reverse),
AddCommandParameter(_dialect.LikeValueFilter(value, true, false, reverse)));
return(true);
}
}
default:
return(false);
}
}