public ExecuteFilterExp(GetFieldExp getfieldExp, FilterExp exp)
: base(Token.FilterOP)
{
this.GetfieldExp = getfieldExp;
this.FilterExp = exp;
}
static void CreateNode(Stack<ExpNode> expStack, Token token)
{
if (token.OpType == TokenType.DotOp)
{
var expRight = expStack.Pop();
var expLeft = expStack.Pop();
var expTemp = new GetFieldExp(token, expLeft, expRight);
expStack.Push(expTemp);
return;
}
if (token.OpType == TokenType.AND
|| token.OpType == TokenType.OR)
{
var expRight = expStack.Pop();
var expLeft = expStack.Pop();
var expTemp = new LogicExp(token, expLeft, expRight);
expStack.Push(expTemp);
return;
}
if (token.OpType == TokenType.EQ
|| token.OpType == TokenType.GE
|| token.OpType == TokenType.GT
|| token.OpType == TokenType.LL
|| token.OpType == TokenType.LE)
{
var expRight = expStack.Pop();
var expLeft = expStack.Pop();
var expTemp = new ComparrisonExp(token, expLeft, expRight);
expStack.Push(expTemp);
return;
}
if (token.OpType == TokenType.FilterOP)
{
var body = expStack.Pop();
var head = expStack.Pop();
expStack.Push(new FilterExp(body, head));
return;
}
if (token.OpType == TokenType.WITH)
{
var withStatement = expStack.Pop();
if (!(withStatement is ExecuteFilterExp))
throw new Exception();
if (expStack.Peek() is WithExp)
{
((WithExp)expStack.Peek()).AddWith((ExecuteFilterExp)withStatement);
}
else
{
var mainExp = expStack.Pop();
if (mainExp is LogicExp)
{
expStack.Push(new WithExp((LogicExp)mainExp, (ExecuteFilterExp)withStatement));
}
else if (mainExp is ComparrisonExp)
{
expStack.Push(new WithExp((ComparrisonExp)mainExp, (ExecuteFilterExp)withStatement));
}
//当仅有with表达式,没有前置的对比和逻辑表达式的时候
else if (mainExp is FieldExp)
{
expStack.Push(mainExp);
expStack.Push(new WithExp(null, (ExecuteFilterExp)withStatement));
}
else
{
throw new Exception();
}
/*
if(!(mainExp is LogicExp) && !(mainExp is ComparrisonExp))
throw new Exception();
expStack.Push(new WithExp((LogicExp)mainExp, (ExecuteFilterExp)withStatement));
*/
}
return;
}
if (token.OpType == TokenType.LINK)
{
var withStatement = expStack.Pop();
if (!(withStatement is ExecuteFilterExp))
throw new Exception();
if (!(expStack.Peek() is WithExp))
{
throw new Exception();
}
((WithExp)expStack.Peek()).AddWith((ExecuteFilterExp)withStatement);
return;
}
throw new Exception();
}