public override Func <TwitterStatus, string> GetStringValueProvider()
{
var lsp = LeftValue.GetStringValueProvider();
var rsp = RightValue.GetStringValueProvider();
return(_ => lsp(_) + rsp(_));
}
public override Func <TwitterStatus, bool> GetBooleanValueProvider()
{
if (CompareAsString())
{
var haystack = LeftValue.GetStringValueProvider();
var needle = RightValue.GetStringValueProvider();
return(t =>
{
var h = haystack(t);
var n = needle(t);
if (h == null || n == null)
{
return false;
}
return h.IndexOf(n, GetStringComparison()) >= 0;
});
}
var lsp = LeftValue.GetSetValueProvider();
if (RightValue.SupportedTypes.Contains(FilterExpressionType.Numeric))
{
var rnp = RightValue.GetNumericValueProvider();
return(_ => lsp(_).Contains(rnp(_)));
}
var rsp = RightValue.GetSetValueProvider();
return(_ =>
{
var ls = lsp(_);
return rsp(_).Any(ls.Contains);
});
}
public override Func <TwitterStatus, bool> GetBooleanValueProvider()
{
// pre-check regular expressions
var sv = this.RightValue as StringValue;
if (sv != null)
{
this.AssertRegex(sv);
var haystack = LeftValue.GetStringValueProvider();
// optimize by pre-compiling
var needleRegex = new Regex(sv.Value, RegexOptions.Compiled);
return(t =>
{
var h = haystack(t);
if (h == null)
{
return false;
}
try
{
return needleRegex.IsMatch(h);
}
catch (ArgumentException)
{
// exception occured
return false;
}
});
}
else
{
var haystack = LeftValue.GetStringValueProvider();
var needle = RightValue.GetStringValueProvider();
return(t =>
{
var h = haystack(t);
var n = needle(t);
if (h == null || n == null)
{
return false;
}
try
{
return Regex.IsMatch(h, n);
}
catch (ArgumentException)
{
// exception occured
return false;
}
});
}
}
public override Func <TwitterStatus, bool> GetBooleanValueProvider()
{
var haystack = LeftValue.GetStringValueProvider();
var needle = RightValue.GetStringValueProvider();
return(t =>
{
var h = haystack(t);
var n = needle(t);
if (h == null || n == null)
{
return false;
}
return h.EndsWith(n, GetStringComparison());
});
}
public override Func <TwitterStatus, bool> GetBooleanValueProvider()
{
switch (this.GetArgumentIntersectTypes())
{
case FilterExpressionType.Boolean:
var lbp = LeftValue.GetBooleanValueProvider();
var rbp = RightValue.GetBooleanValueProvider();
return(_ => lbp(_) == rbp(_));
case FilterExpressionType.Numeric:
var lnp = LeftValue.GetNumericValueProvider();
var rnp = RightValue.GetNumericValueProvider();
return(_ => lnp(_) == rnp(_));
case FilterExpressionType.String:
var lsp = LeftValue.GetStringValueProvider();
var rsp = RightValue.GetStringValueProvider();
return(_ => String.Equals(lsp(_), rsp(_), GetStringComparison()));
default:
throw new InvalidOperationException("Invalid code path.");
}
}