private void MarkAsChild(Ast.Expression childExpression)
{
if (childExpression.CodeType == CodeType.LogicalExpression)
{
((Ast.LogicalExpression)childExpression).IsChild = true;
}
}
internal Expression Visit(Expression expression)
{
switch (expression.CodeType)
{
case CodeType.BlockExpression:
return VisitBlockExpression((BlockExpression)expression);
case CodeType.TypeExpression:
return VisitTypeExpression((TypeExpression)expression);
case CodeType.LambdaExpresion:
return VisitLambdaExpression((LambdaExpression)expression);
case CodeType.LogicalExpression:
return VisitLogicalExpression((LogicalExpression)expression);
case CodeType.BinaryExpression:
return VisitBinaryExpression((BinaryExpression)expression);
case CodeType.LiteralExpression:
return VisitLiteralExpression((LiteralExpression)expression);
case CodeType.MemberExpression:
return VisitMemberExpression((MemberExpression)expression);
case CodeType.OrderbyExpression:
return VisitOrderbyExpression((OrderbyExpression)expression);
case CodeType.MethodCallExpression:
return VisitMethodCallExpression((MethodCallExpression)expression);
}
throw new ArgumentException("Expression type is not supported");
}
/// <summary>
/// Invoked during execution of the query, with the
/// pre populated expression tree.
/// </summary>
/// <param name="expression">Target expression block</param>
/// <returns>Expected result</returns>
public IEnumerable <T> Execute(Ast.Expression expression)
{
Visit(expression);
var optionsIn = string.Join(";", Options.Select(x => $"{x.Key}={x.Value}"));
var objectType = ObjectTypes.GetObjectType <T>();
var xmlIn = WitsmlParser.ToXml(Query, true);
var originalXmlIn = xmlIn;
if (Context.Connection.CompressRequests)
{
ClientCompression.Compress(ref xmlIn, ref optionsIn);
}
Context.LogQuery(Functions.GetFromStore, objectType, originalXmlIn, optionsIn);
using (var client = Context.Connection.CreateClientProxy().WithUserAgent())
{
var wmls = (IWitsmlClient)client;
string suppMsgOut, xmlOut = string.Empty;
var result = Enumerable.Empty <T>();
short returnCode;
try
{
returnCode = wmls.WMLS_GetFromStore(objectType, xmlIn, optionsIn, null, out xmlOut, out suppMsgOut);
}
catch (Exception ex)
{
Logger.ErrorFormat("Error querying store: {0}", ex);
returnCode = -1;
suppMsgOut = "Error querying store:" + ex.GetBaseException().Message;
}
try
{
// Handle servers that compress the response to a compressed request.
if (Context.Connection.CompressRequests)
{
xmlOut = ClientCompression.SafeDecompress(xmlOut);
}
if (returnCode > 0)
{
var document = WitsmlParser.Parse(xmlOut);
var response = WitsmlParser.Parse <TList>(document.Root);
result = (IEnumerable <T>)response.Items;
}
}
catch (WitsmlException ex)
{
Logger.ErrorFormat("Error parsing query response: {0}{2}{2}{1}", xmlOut, ex, Environment.NewLine);
returnCode = (short)ex.ErrorCode;
suppMsgOut = ex.Message + " " + ex.GetBaseException().Message;
}
Context.LogResponse(Functions.GetFromStore, objectType, originalXmlIn, optionsIn, xmlOut, returnCode, suppMsgOut);
return(result);
}
}
internal Ast.Expression Visit(Ast.Expression expression)
{
switch (expression.CodeType)
{
case CodeType.BlockExpression:
return(VisitBlockExpression((Ast.BlockExpression)expression));
case CodeType.TypeExpression:
return(VisitTypeExpression((Ast.TypeExpression)expression));
case CodeType.LambdaExpresion:
return(VisitLambdaExpression((Ast.LambdaExpression)expression));
case CodeType.LogicalExpression:
return(VisitLogicalExpression((Ast.LogicalExpression)expression));
case CodeType.BinaryExpression:
return(VisitBinaryExpression((Ast.BinaryExpression)expression));
case CodeType.LiteralExpression:
return(VisitLiteralExpression((Ast.LiteralExpression)expression));
case CodeType.MemberExpression:
return(VisitMemberExpression((Ast.MemberExpression)expression));
case CodeType.OrderbyExpression:
return(VisitOrderbyExpression((Ast.OrderbyExpression)expression));
}
throw new ArgumentException("Expression type is not supported");
}
/// <summary>
/// Invoked during execution of the query , with the
/// pre populated expression tree.
/// </summary>
/// <param name="expression">Target expression block</param>
/// <returns>Expected result</returns>
public IEnumerable <T> Execute(Ast.Expression expression)
{
//TODO: Visit the extender expression to build your meta
this.Visit(expression);
///TOOD: return your result.
return(null);
}
public IEnumerable <T> Execute(LinqExtender.Ast.Expression expression)
{
this._currentExpression = expression;
this.Visit(expression);
var listingAction = new ToListAction <T>(this._metadataStore,
this._hydrator, this._connection, _dialect, _environment);
var entities = listingAction.GetListing(this.CurrentStatement, this._parameters);
return(entities);
}
IEnumerable <T> IQueryContext <T> .Execute(Ast.Expression exprssion)
{
return(queryContext.Execute(exprssion));
}