public FieldSelectorTree GenerateFromLambdaExpression <TProperty>([NotNull] Expression <Func <TRoot, TProperty> > selector)
{
if (selector == null)
{
throw new ArgumentNullException(nameof(selector));
}
this.rootPart = new FieldSelectorTree();
this.Visit(selector);
FieldSelectorPart addCurrentToMe = null;
foreach (var childPart in this.fieldSelectorParts)
{
if (!this.rootPart.ChildParts.Any())
{
addCurrentToMe = childPart;
this.rootPart.AddPart(childPart);
}
else if (addCurrentToMe != null)
{
addCurrentToMe.AddPart(childPart);
addCurrentToMe = childPart;
}
}
var result = this.rootPart;
this.rootPart = null;
return(result);
}
public FieldSelectorTree GenerateFullFieldSelectorTree(Int32 maximumDeep)
{
var result = new FieldSelectorTree();
var childParts = this.GenerateChildTreeFromProperties(typeof(TRoot).GetProperties(), 0, maximumDeep);
foreach (var childPart in childParts)
{
result.AddPart(childPart);
}
return(result);
}
/// <summary>
/// Optimizes the whole tree.
/// </summary>
/// <param name="unoptimizedPart">The unoptimized tree on which the optimization is applied.</param>
/// <param name="optimizeWith">The full tree which is used to process the optimization.</param>
/// <exception cref="ArgumentNullException">The value of '<paramref name="optimizeWith"/>' and '<paramref name="unoptimizedPart"/>' cannot be null. </exception>
private void Optimize([NotNull] FieldSelectorTree unoptimizedPart, [NotNull] FieldSelectorTree optimizeWith)
{
if (unoptimizedPart == null)
{
throw new ArgumentNullException(nameof(unoptimizedPart));
}
if (optimizeWith == null)
{
throw new ArgumentNullException(nameof(optimizeWith));
}
foreach (var combinedPart in unoptimizedPart.ChildParts.Select(m => new OptimizableFieldSelectorPart(m, optimizeWith.ChildParts.Single(n => n.PartName == m.PartName))))
{
this.OptimizePart(combinedPart);
}
}
private FieldSelectorTree MergeRootParts([NotNull] IEnumerable <FieldSelectorTree> rootParts)
{
if (rootParts == null)
{
throw new ArgumentNullException(nameof(rootParts));
}
var result = new FieldSelectorTree();
foreach (var firstLevel in rootParts.SelectMany(m => m.ChildParts).GroupBy(m => m.PartName))
{
var childgroup = new FieldSelectorPart(firstLevel.Key);
foreach (var part in this.MergeChildPart(firstLevel.SelectMany(m => m.ChildParts).GroupBy(m => m.PartName)))
{
childgroup.AddPart(part);
}
result.AddPart(childgroup);
}
return(result);
}
