internal override Expression VisitInputReferenceExpression(InputReferenceExpression ire)
{
Debug.Assert(ire != null, "ire != null");
if (this.parent == null || this.parent.NodeType != ExpressionType.MemberAccess)
{
string expressionText = (this.parent != null) ? this.parent.ToString() : ire.ToString();
throw new NotSupportedException(Strings.ALinq_CantTranslateExpression(expressionText));
}
return(ire);
}
internal static string ExpressionToString(DataServiceContext context, Expression e)
{
ExpressionWriter ew = new ExpressionWriter(context);
string serialized = ew.Translate(e);
if (ew.cantTranslateExpression)
{
throw new NotSupportedException(Strings.ALinq_CantTranslateExpression(e.ToString()));
}
return(serialized);
}
/// <summary>
/// Serializes an expression to a string
/// </summary>
/// <param name='context'>Data context used to generate type names for types.</param>
/// <param name="e">Expression to serialize</param>
/// <param name='inPath'>Whether or not the expression being written is part of the path of the URI.</param>
/// <param name="uriVersion">the request data service version for the uri</param>
/// <returns>serialized expression</returns>
internal static string ExpressionToString(DataServiceContext context, Expression e, bool inPath, ref Version uriVersion)
{
ExpressionWriter ew = new ExpressionWriter(context, inPath);
string serialized = ew.Translate(e);
WebUtil.RaiseVersion(ref uriVersion, ew.uriVersion);
if (ew.cantTranslateExpression)
{
throw new NotSupportedException(Strings.ALinq_CantTranslateExpression(e.ToString()));
}
return(serialized);
}
/// <summary>
/// Input resource set references are intentionally omitted from the URL string.
/// </summary>
/// <param name="ire">The input reference</param>
/// <returns>The same input reference expression</returns>
internal override Expression VisitInputReferenceExpression(InputReferenceExpression ire)
{
// This method intentionally does not write anything to the URI.
// This is how 'Where(<input>.Id == 5)' becomes '$filter=Id eq 5'.
Debug.Assert(ire != null, "ire != null");
if (this.parent == null || this.parent.NodeType != ExpressionType.MemberAccess)
{
// Ideally we refer to the parent expression as the un-translatable one,
// because we cannot reference 'this' as a standalone expression; however
// if the parent is null for any reasonn, we fall back to the expression itself.
string expressionText = (this.parent != null) ? this.parent.ToString() : ire.ToString();
throw new NotSupportedException(Strings.ALinq_CantTranslateExpression(expressionText));
}
return(ire);
}
/// <summary>
/// Input resource set references are intentionally omitted from the URL string for the top level
/// refences to input parameter (i.e. outside of any/all methods).
/// For parameter references to input (range variable for Where) inside any/all methods we write "$it".
/// </summary>
/// <param name="ire">The input reference</param>
/// <returns>The same input reference expression</returns>
internal override Expression VisitInputReferenceExpression(InputReferenceExpression ire)
{
// This method intentionally does not write anything to the URI for implicit references to the input parameter ($it).
// This is how 'Where(<input>.Id == 5)' becomes '$filter=Id eq 5'.
Debug.Assert(ire != null, "ire != null");
if (this.parent == null || (!this.InSubScope && this.parent.NodeType != ExpressionType.MemberAccess && this.parent.NodeType != ExpressionType.TypeAs))
{
// Ideally we refer to the parent expression as the un-translatable one,
// because we cannot reference 'this' as a standalone expression; however
// if the parent is null for any reasonn, we fall back to the expression itself.
string expressionText = (this.parent != null) ? this.parent.ToString() : ire.ToString();
throw new NotSupportedException(Strings.ALinq_CantTranslateExpression(expressionText));
}
// Write "$it" for input parameter reference inside any/all methods
if (this.InSubScope)
{
this.builder.Append(XmlConstants.ImplicitFilterParameter);
}
return(ire);
}