public ODataExpression Translate(Expression linq, out IQueryable rootQuery, out ResultTranslator resultTranslator)
{
this._isInsideQuery = false;
this._rootQuery = null;
this._resultTranslator = null;
this._memberAndParameterTranslator = new MemberAndParameterTranslator(this);
// normalize away ODataRow constructs
var normalized = ODataEntity.Normalize(linq);
var translated = this.TranslateInternal(normalized);
if (translated.Kind == ODataExpressionKind.Query)
{
var referencedPaths = this._memberAndParameterTranslator.GetReferencedMemberPathsInFinalProjection();
if (referencedPaths != null)
{
var selectColumns = referencedPaths.Select(p => p.Aggregate(default(ODataMemberAccessExpression), (e, m) => ODataExpression.MemberAccess(e, (PropertyInfo)m)))
.Select(ma => ODataExpression.SelectColumn(ma, allColumns: ma.Type == ODataExpressionType.Complex));
translated = ((ODataQueryExpression)translated).Update(select: selectColumns);
}
}
rootQuery = this._rootQuery;
var projection = this._memberAndParameterTranslator.GetFinalProjection();
var finalTranslator = this._resultTranslator ?? ((values, count) => values);
if (projection != null)
{
var selectMethod = Helpers.GetMethod((IEnumerable <object> e) => e.Select(o => o))
.GetGenericMethodDefinition()
.MakeGenericMethod(projection.Type.GetGenericArguments(typeof(Func <,>)));
// restores any ODataRow constructs that were normalized away, since we need to be able to compile and run the projection
// (i. e. fake ODataRow property accesses don't run when compiled)
var denormalizedProjection = (LambdaExpression)ODataEntity.Denormalize(projection);
Func <object, object> queryTranslator = enumerable => selectMethod.Invoke(null, new[] { enumerable, denormalizedProjection.Compile() });
resultTranslator = (values, count) => finalTranslator((IEnumerable)queryTranslator(values), count);
}
else
{
resultTranslator = finalTranslator;
}
return(translated);
}
public ODataExpression Translate(Expression linq, out IQueryable rootQuery, out ResultTranslator resultTranslator)
{
this._isInsideQuery = false;
this._rootQuery = null;
this._resultTranslator = null;
this._memberAndParameterTranslator = new MemberAndParameterTranslator(this);
// normalize away ODataRow constructs
var normalized = ODataEntity.Normalize(linq);
var translated = this.TranslateInternal(normalized);
if (translated.Kind == ODataExpressionKind.Query)
{
var referencedPaths = this._memberAndParameterTranslator.GetReferencedMemberPathsInFinalProjection();
if (referencedPaths != null)
{
var selectColumns = referencedPaths.Select(p => p.Aggregate(default(ODataMemberAccessExpression), (e, m) => ODataExpression.MemberAccess(e, (PropertyInfo)m)))
.Select(ma => ODataExpression.SelectColumn(ma, allColumns: ma.Type == ODataExpressionType.Complex));
translated = ((ODataQueryExpression)translated).Update(select: selectColumns);
}
}
rootQuery = this._rootQuery;
var projection = this._memberAndParameterTranslator.GetFinalProjection();
var finalTranslator = this._resultTranslator ?? ((values, count) => values);
if (projection != null)
{
var selectMethod = Helpers.GetMethod((IEnumerable<object> e) => e.Select(o => o))
.GetGenericMethodDefinition()
.MakeGenericMethod(projection.Type.GetGenericArguments(typeof(Func<,>)));
// restores any ODataRow constructs that were normalized away, since we need to be able to compile and run the projection
// (i. e. fake ODataRow property accesses don't run when compiled)
var denormalizedProjection = (LambdaExpression)ODataEntity.Denormalize(projection);
Func<object, object> queryTranslator = enumerable => selectMethod.Invoke(null, new[] { enumerable, denormalizedProjection.Compile() });
resultTranslator = (values, count) => finalTranslator((IEnumerable)queryTranslator(values), count);
}
else
{
resultTranslator = finalTranslator;
}
return translated;
}
