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using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
namespace System.Data.Linq {
/// <summary>
/// The result of executing a query.
/// </summary>
public interface IExecuteResult : IDisposable {
/// <summary>
/// The return value or result of the executed query. This object has the same type as the
/// query expression's Type property.
/// </summary>
object ReturnValue { get; }
/// <summary>
/// Retrieves the nth output parameter. This method is normally used when the query is a mapped
/// function with output parameters.
/// </summary>
/// <param name="parameterIndex"></param>
/// <returns></returns>
object GetParameterValue(int parameterIndex);
}
/// <summary>
/// Interface providing access to a function return value.
/// </summary>
public interface IFunctionResult {
/// <summary>
/// The value.
/// </summary>
object ReturnValue { get; }
}
/// <summary>
/// An interface for representing the result of a mapped function with a single return sequence.
/// </summary>
[SuppressMessage("Microsoft.Naming", "CA1710:IdentifiersShouldHaveCorrectSuffix", Justification="tadam: Meant to represent a database table which is delayed loaded and doesn't provide collection semantics.")]
public interface ISingleResult<T> : IEnumerable<T>, IFunctionResult, IDisposable { }
/// <summary>
/// An interface for representing results of mapped functions or queries with variable return sequences.
/// </summary>
public interface IMultipleResults : IFunctionResult, IDisposable {
/// <summary>
/// Retrieves the next result as a sequence of Type 'TElement'.
/// </summary>
/// <typeparam name="TElement"></typeparam>
/// <returns></returns>
[SuppressMessage("Microsoft.Design", "CA1004:GenericMethodsShouldProvideTypeParameter", Justification = "tadam: Generic parameters are required for strong-typing of the return type.")]
IEnumerable<TElement> GetResult<TElement>();
}
}
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