protected override IBuildContext BuildMethodCall(ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo)
{
var mergeContext = (MergeContext)builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]));
if (LinqExtensions.UsingMethodInfo1 == methodCall.Method.GetGenericMethodDefinition())
{
var sourceContext = builder.BuildSequence(new BuildInfo(buildInfo, methodCall.Arguments[1], new SelectQuery()));
var source = new TableLikeQueryContext(sourceContext);
mergeContext.Sequences = new IBuildContext[] { mergeContext.Sequence, source };
mergeContext.Merge.Source = source.Source;
}
else
{
var enumerableBuildInfo = new BuildInfo(buildInfo, methodCall.Arguments[1], new SelectQuery());
var type = FindType(builder, enumerableBuildInfo);
var sourceContext = new EnumerableContext(builder, enumerableBuildInfo,
enumerableBuildInfo.SelectQuery, type,
builder.ConvertToSql(buildInfo.Parent, enumerableBuildInfo.Expression));
var source = new TableLikeQueryContext(sourceContext);
mergeContext.Sequences = new IBuildContext[] { mergeContext.Sequence, source };
mergeContext.Merge.Source = source.Source;
}
return(mergeContext);
}
public IBuildContext BuildSequence(ExpressionBuilder builder, BuildInfo buildInfo)
{
var collectionType = typeof(IEnumerable <>).GetGenericType(buildInfo.Expression.Type) ??
throw new InvalidOperationException();
var enumerableContext = new EnumerableContext(builder, buildInfo, buildInfo.SelectQuery, collectionType.GetGenericArguments()[0]);
return(enumerableContext);
}