using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Simple.Data.QueryPolyfills

{

abstract class ValueResolver

{

public static ValueResolver Create(SimpleReference reference)

{

var objectReference = reference as ObjectReference;

if (!ReferenceEquals(null, objectReference)) return new ObjectValueResolver(objectReference);

var functionReference = reference as FunctionReference;

if (!ReferenceEquals(null, functionReference))

{

if (FunctionHandlers.Exists(functionReference.Name)) return new AggregateValueResolver(functionReference);

return new FunctionValueResolver(functionReference);

}

throw new InvalidOperationException("Unresolvable Reference type.");

}

public abstract void CopyValue(IDictionary<string, object> source, IDictionary<string, object> target, IEnumerable<IDictionary<string,object>> sourceAggregationValues = null);

public abstract object GetValue(IDictionary<string, object> source, IEnumerable<IDictionary<string, object>> sourceAggregationValues = null);

}

}