/// <summary>
/// Sorts the source collection using custom sort criteria.
/// </summary>
/// <remarks>
/// Please note that your compare function needs to take care about
/// proper conversion of types to be comparable!
/// </remarks>
/// <param name="source">
/// The source collection to sort.
/// </param>
/// <param name="args">
/// Sort criteria to use.
/// </param>
/// <returns>
/// A sorted array containing collection elements.
/// </returns>
public object Execute(ICollection source, object[] args)
{
if (source == null || source.Count == 0)
{
return(source);
}
if (args == null || args.Length != 1)
{
throw new ArgumentException("compare expression is a required argument for orderBy");
}
var arg = args[0];
IComparer comparer = null;
if (arg is string)
{
var expCompare = Expression.Parse((string)arg);
comparer = new SimpleExpressionComparer(expCompare);
}
else if (arg is IComparer)
{
comparer = (IComparer)arg;
}
else if (arg is LambdaExpressionNode)
{
var fnCompare = (LambdaExpressionNode)arg;
if (fnCompare.ArgumentNames.Length != 2)
{
throw new ArgumentException("compare function must accept 2 arguments");
}
comparer = new LambdaComparer(fnCompare);
}
else if (arg is Delegate)
{
comparer = new DelegateComparer((Delegate)arg);
}
AssertUtils.ArgumentNotNull(comparer, "comparer",
"orderBy(comparer) argument 'comparer' does not evaluate to a supported type");
var list = new ArrayList(source);
list.Sort(comparer);
return(list);
}
/// <summary>
/// Sorts the source collection using custom sort criteria.
/// </summary>
/// <remarks>
/// Please note that your compare function needs to take care about
/// proper conversion of types to be comparable!
/// </remarks>
/// <param name="source">
/// The source collection to sort.
/// </param>
/// <param name="args">
/// Sort criteria to use.
/// </param>
/// <returns>
/// A sorted array containing collection elements.
/// </returns>
public object Execute(ICollection source, object[] args)
{
if (source == null || source.Count == 0)
{
return source;
}
if (args == null || args.Length != 1)
{
throw new ArgumentException("compare expression is a required argument for orderBy");
}
var arg = args[0];
IComparer comparer = null;
if (arg is string)
{
var expCompare = Expression.Parse((string) arg);
comparer = new SimpleExpressionComparer(expCompare);
}
else if (arg is IComparer)
{
comparer = (IComparer) arg;
}
else if (arg is LambdaExpressionNode)
{
var fnCompare = (LambdaExpressionNode) arg;
if (fnCompare.ArgumentNames.Length != 2)
{
throw new ArgumentException("compare function must accept 2 arguments");
}
comparer = new LambdaComparer(fnCompare);
}
else if (arg is Delegate)
{
comparer = new DelegateComparer((Delegate) arg);
}
AssertUtils.ArgumentNotNull(comparer, "comparer",
"orderBy(comparer) argument 'comparer' does not evaluate to a supported type");
var list = new ArrayList(source);
list.Sort(comparer);
return list;
}
