Svelto.ECS/Svelto.ECS/IEntitiesDB.cs

using Svelto.DataStructures;
using Svelto.Utilities;

namespace Svelto.ECS
{
    public interface IEntitiesDB
    {
        /// <summary>
        /// All the EntityView related methods are left for back compatibility, but
        /// shouldn't be used anymore. Always pick EntityViewStruct or EntityStruct
        /// over EntityView
        /// </summary>
        ReadOnlyCollectionStruct<T> QueryEntityViews<T>() where T : class, IEntityStruct;
        /// <summary>
        /// All the EntityView related methods are left for back compatibility, but
        /// shouldn't be used anymore. Always pick EntityViewStruct or EntityStruct
        /// over EntityView
        /// </summary>
        ReadOnlyCollectionStruct<T> QueryEntityViews<T>(int group) where T : class, IEntityStruct;
        /// <summary>
        /// All the EntityView related methods are left for back compatibility, but
        /// shouldn't be used anymore. Always pick EntityViewStruct or EntityStruct
        /// over EntityView
        /// </summary>
        bool TryQueryEntityView<T>(EGID egid, out T entityView) where T : class, IEntityStruct;
        /// <summary>
        /// All the EntityView related methods are left for back compatibility, but
        /// shouldn't be used anymore. Always pick EntityViewStruct or EntityStruct
        /// over EntityView
        /// </summary>
        T QueryEntityView<T>(EGID egid) where T : class, IEntityStruct;

        //to use with EntityViews, EntityStructs and EntityViewStructs
        T[] QueryEntities<T>(out int count) where T : IEntityStruct;
        T[] QueryEntities<T>(int group, out int count) where T : IEntityStruct;
        T[] QueryEntitiesAndIndex<T>(EGID entityGid, out uint index) where T : IEntityStruct;

        //to use with EntityViews, EntityStructs and EntityViewStructs
        void ExecuteOnEntity<T, W>(EGID egid, ref W value, ActionRef<T, W> action) where T : IEntityStruct;
        void ExecuteOnEntity<T>(EGID egid, ActionRef<T> action) where T : IEntityStruct;
        
        bool Exists<T>(EGID egid) where T : IEntityStruct;
        
        bool HasAny<T>() where T:IEntityStruct;
        bool HasAny<T>(int group) where T:IEntityStruct;
    }
}