public virtual ODataExpression VisitFunctionCall(ODataFunctionCallExpression expr)
{
bool updated = false;
ODataExpression[] args = new ODataExpression[expr.Arguments.Length];
for (int i = 0; i < expr.Arguments.Length; i++)
{
ODataExpression arg = expr.Arguments[i];
ODataExpression newArg = this.Visit(arg);
if (newArg != arg)
{
updated = true;
args[i] = newArg;
}
else
{
args[i] = arg;
}
}
if (updated)
{
return new ODataFunctionCallExpression(expr.Name, args);
}
return expr;
}
public Selector(ODataExpression e, Order order)
{
this.Expression = e;
this.Order = order;
}
public ODataFunctionCallExpression(string name, ODataExpression[] arguments)
{
this.Name = name;
this.Arguments = arguments;
this.ExpressionType = ExpressionType.Call;
}
public ODataMemberExpression(ODataExpression instance, string memberName)
{
if (string.IsNullOrEmpty(memberName))
{
throw new ArgumentNullException("memberName");
}
this.Instance = instance;
this.Member = memberName;
this.ExpressionType = ExpressionType.MemberAccess;
}
public ODataBinaryExpression(ODataExpression left, ODataExpression right)
{
this.Left = left;
this.Right = right;
}
private ODataExpression ParseAny(ODataExpression parent)
{
return this.ParseAnyAll(parent, true);
}
public static ODataExpression Multiply(ODataExpression left, ODataExpression right)
{
ODataBinaryExpression bex = new ODataBinaryExpression(left, right);
bex.ExpressionType = ExpressionType.Multiply;
return bex;
}
public static ODataExpression Subtract(ODataExpression left, ODataExpression right)
{
ODataBinaryExpression bex = new ODataBinaryExpression(left, right);
bex.ExpressionType = ExpressionType.Subtract;
return bex;
}
public virtual ODataExpression Visit(ODataExpression expr)
{
return expr.Accept(this);
}
private ODataExpression ParseTypeSegment(ODataExpression parent)
{
throw new NotSupportedException("Segments unsupported");
}
//TODO
private ODataExpression ParseMemberAccess(ODataExpression instance)
{
if (this.token.Text == "*")
{
return this.ParseStarMemberAccess(instance);
}
string identifier = this.GetIdentifier();
if (instance == null && this.parameters.Contains(identifier))
{
this.NextToken();
return new ODataParameterExpression(identifier);
}
this.NextToken();
return new ODataMemberExpression(instance, identifier);
}
private ODataExpression ParseStarMemberAccess(ODataExpression instance)
{
throw new NotSupportedException("star unsupported");
}
private ODataExpression ParseSegment(ODataExpression parent)
{
string identifier = this.GetIdentifier();
this.NextToken();
if (this.parameters.Contains(identifier) && parent == null)
{
return new ODataParameterExpression(identifier);
}
throw new NotSupportedException("Segment not supported");
}
private ODataExpression ParseAnyAll(ODataExpression parent, bool isAny)
{
//any and all not supported
throw new NotSupportedException();
}
public static ODataExpression GreaterThan(ODataExpression left, ODataExpression right)
{
ODataBinaryExpression bex = new ODataBinaryExpression(left, right);
bex.ExpressionType = ExpressionType.GreaterThan;
return bex;
}
public static ODataExpression Negate(ODataExpression expr)
{
return new ODataUnaryExpression(expr, ExpressionType.Negate);
}
public static ODataExpression LessThanOrEqual(ODataExpression left, ODataExpression right)
{
ODataBinaryExpression bex = new ODataBinaryExpression(left, right);
bex.ExpressionType = ExpressionType.LessThanOrEqual;
return bex;
}
public static ODataExpression Not(ODataExpression expr)
{
return new ODataUnaryExpression(expr, ExpressionType.Not);
}
public static ODataExpression AndAlso(ODataExpression left, ODataExpression right)
{
ODataBinaryExpression bex = new ODataBinaryExpression(left, right);
bex.ExpressionType = ExpressionType.AndAlso;
return bex;
}
public ODataUnaryExpression(ODataExpression expr, ExpressionType type)
{
this.Operand = expr;
this.ExpressionType = type;
}
public static ODataExpression Divide(ODataExpression left, ODataExpression right)
{
ODataBinaryExpression bex = new ODataBinaryExpression(left, right);
bex.ExpressionType = ExpressionType.Divide;
return bex;
}
private ODataExpression ParseAll(ODataExpression parent)
{
return this.ParseAnyAll(parent, false);
}
