protected override Expression VisitBinary(BinaryExpression exp)
{
LeftOperator = ToOperator(exp.Left);
RightOperator = ToOperator(exp.Right);
FieldType dataType;
CamlFieldRef fieldRef = GetFieldRef(out dataType);
CamlValue value = GetValue(dataType);
if (fieldRef == null)
{
return(exp);
}
switch (exp.NodeType)
{
case ExpressionType.Equal:
if (exp.Right.IsNullValue())
{
Operator = new Caml.Operators.IsNull(fieldRef);
}
else
{
Operator = new Caml.Operators.Eq(fieldRef, value);
}
break;
case ExpressionType.NotEqual:
if (exp.Right.IsNullValue())
{
Operator = new Caml.Operators.IsNotNull(fieldRef);
}
else
{
Operator = new Caml.Operators.Neq(fieldRef, value);
}
break;
case ExpressionType.GreaterThan:
Operator = new Caml.Operators.Gt(fieldRef, value);
break;
case ExpressionType.GreaterThanOrEqual:
Operator = new Caml.Operators.Geq(fieldRef, value);
break;
case ExpressionType.LessThan:
Operator = new Caml.Operators.Lt(fieldRef, value);
break;
case ExpressionType.LessThanOrEqual:
Operator = new Caml.Operators.Leq(fieldRef, value);
break;
//case ExpressionType.Convert:
// Visit(exp);
// break;
default:
throw new NotSupportedException($"{exp.NodeType} operator is not supported in LinqToSP.");
}
return(exp);
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
Expression expression = node;
if (node.Method.Name == "Equals")
{
foreach (var arg in node.Arguments)
{
Visit(arg);
}
FieldType dataType;
CamlFieldRef fieldRef = GetFieldRef(out dataType);
CamlValue value = GetValue(dataType);
Operator = new Caml.Operators.Eq(fieldRef, value);
}
else if (node.Method.Name == "NotEquals")
{
Visit(node.Object);
foreach (var arg in node.Arguments)
{
Visit(arg);
}
FieldType dataType;
CamlFieldRef fieldRef = GetFieldRef(out dataType);
CamlValue value = GetValue(dataType);
Operator = new Caml.Operators.Neq(fieldRef, value);
//return null;
}
return(expression);
}
