public object Evaluate(params object[] parameters)
{
object source = parameters != null ? parameters[0] : null;
string key = (string)parameters[1];
object condition = parameters[2];
if (source == null)
{
return(null);
}
if (key == null)
{
throw FunctionEvaluationException.WrongParameter(this, 1, source);
}
if (source is IEnumerable)
{
var linq = ((IEnumerable)source).Cast <object>();
return(linq.Where(
item =>
{
var t = new Reflection(item)[key];
if (t == null && condition == null)
{
return true;
}
return Equals(TypeConverter.To(t, condition.GetType()), condition);
}
).ToArray());
}
throw FunctionEvaluationException.WrongParameter(this, 0, source);
}
public object Evaluate(params object[] parameters)
{
object source = parameters != null ? parameters[0] : null;
if (source == null)
{
return(0);
}
else if (source is string)
{
return(((string)source).Length);
}
else if (source is IDictionary)
{
return(((IDictionary)source).Count);
}
else if (source is Array)
{
return(((Array)source).Length);
}
else if (source is IList)
{
return(((IList)source).Count);
}
if (source is IEnumerable)
{
return(CountEnumerable((IEnumerable)source));
}
else
{
throw FunctionEvaluationException.WrongParameter(this, 0, source);
}
}
public object Evaluate(params object[] parameters)
{
object source = parameters != null ? parameters[0] : null;
if (source == null)
{
return(null);
}
else if (source is string)
{
return(StringUtils.Reverse((string)source));
}
else if (source is Array)
{
return(CollectionUtils.Reverse((Array)source));
}
else if (source is IEnumerable)
{
Stack reversed = new Stack();
foreach (var o in source as IEnumerable)
{
reversed.Push(o);
}
return(reversed);
}
else
{
throw FunctionEvaluationException.WrongParameter(this, 0, source);
}
}
public object Evaluate(params object[] parameters)
{
object source = parameters != null ? parameters[0] : null;
string key = (string)parameters[1];
if (source == null)
{
return(null);
}
if (key == null)
{
throw FunctionEvaluationException.WrongParameter(this, 1, source);
}
if (source is IEnumerable)
{
var linq = ((IEnumerable)source).Cast <object>();
return(linq.Select(
item => new Reflection(item)[key]
).ToArray());
}
throw FunctionEvaluationException.WrongParameter(this, 0, source);
}
