ListReferer

Referer that refers to an element of a list implements interface IRefererBase<(Element, long), List>.

ListReferer.Create(type) creates implementation for lists that implement IList<T>.

// Create referer
IReferer<(List<int>, long), int> referer = (IReferer<(List<int>, long), int>)ListReferer.Create(typeof(List<int>));

Referer gets a reference to an element.

// Create list
List<int> list = new List<int> { 1, 2, 3 };
// Get pointer to index '2'
ref int elementPointer = ref referer.GetReference((list, 2));
// Read
WriteLine(elementPointer);
// Write
elementPointer = 100;
// Read
WriteLine(list[2]);

ListReferer.Create(type) creates implementation for arrays as well.

// Create referer
IReferer<(int[], long), int> referer = (IReferer<(int[], long), int>)ListReferer.Create(typeof(int[]));

Array elements are referable as well.

// Create list
int[] array = new int[] { 4, 5, 6 };
// Get pointer to index '2'
ref int elementPointer = ref referer.GetReference((array, 2));
// Read
WriteLine(elementPointer);
// Write
elementPointer = 100;
// Read
WriteLine(array[2]);

ListRefererRequest is request to query a list-element-referer from service.

// Create service
IService service = Services.Create((ServiceHandlers.Instance, AccessorHandlers.Instance), CachePolicies.Default);
// Create request
IRequest request = new ListRefererRequest(typeof(List<int>));
// Create referer
IReferer<(List<int>, long), int> referer = service.GetRequired<IRequest, IReferer<(List<int>, long), int>>(request);

Full Example

Full example

using System.Collections.Generic;
using Avalanche.Accessor;
using Avalanche.Accessor.List;
using Avalanche.Service;
using Avalanche.Writer;
using static System.Console;

class listreferer
{
    public static void Run()
    {

        {
            // <01>
            // Create referer
            IReferer<(List<int>, long), int> referer = (IReferer<(List<int>, long), int>)ListReferer.Create(typeof(List<int>));
            // </01>
            // <02>
            // Create list
            List<int> list = new List<int> { 1, 2, 3 };
            // Get pointer to index '2'
            ref int elementPointer = ref referer.GetReference((list, 2));
            // Read
            WriteLine(elementPointer);
            // Write
            elementPointer = 100;
            // Read
            WriteLine(list[2]);
            // </02>
        }

        {
            // <11>
            // Create referer
            IReferer<(int[], long), int> referer = (IReferer<(int[], long), int>)ListReferer.Create(typeof(int[]));
            // </11>
            // <12>
            // Create list
            int[] array = new int[] { 4, 5, 6 };
            // Get pointer to index '2'
            ref int elementPointer = ref referer.GetReference((array, 2));
            // Read
            WriteLine(elementPointer);
            // Write
            elementPointer = 100;
            // Read
            WriteLine(array[2]);
            // </12>
        }

        {
            // <21>
            // Create service
            IService service = Services.Create((ServiceHandlers.Instance, AccessorHandlers.Instance), CachePolicies.Default);
            // Create request
            IRequest request = new ListRefererRequest(typeof(List<int>));
            // Create referer
            IReferer<(List<int>, long), int> referer = service.GetRequired<IRequest, IReferer<(List<int>, long), int>>(request);
            // </21>
            // Create list
            List<int> list = new List<int> { 1, 2, 3 };
            // Get pointer to index '2'
            ref int elementPointer = ref referer.GetReference((list, 2));
            // Read
            WriteLine(elementPointer);
            // Write
            elementPointer = 100;
            // Read
            WriteLine(list[2]);
        }

    }
}