73 lines
3.0 KiB
C#
73 lines
3.0 KiB
C#
|
using PoweredSoft.DynamicQuery.Core;
|
|||
|
|
using System;
|
|||
|
|
using System.Collections.Generic;
|
|||
|
|
using System.Linq;
|
|||
|
|
using System.Reflection;
|
|||
|
|
using System.Text;
|
|||
|
|
using System.Threading.Tasks;
|
|||
|
|
|
|||
|
|
namespace PoweredSoft.DynamicQuery
|
|||
|
|
{
|
|||
|
|
public class QueryBuilder : IQueryBuilder
|
|||
|
|
{
|
|||
|
|
protected List<IQueryInterceptor> Interceptors { get; } = new List<IQueryInterceptor>();
|
|||
|
|
protected IQueryCriteria Criteria { get; set; }
|
|||
|
|
protected IQueryable QueryableAtStart { get; private set; }
|
|||
|
|
protected IQueryable CurrentQueryable { get; set; }
|
|||
|
|
protected Type QueryableUnderlyingType => QueryableAtStart.ElementType;
|
|||
|
|
private MethodInfo ApplyInterceptorsAndCriteriaMethod { get; } = typeof(QueryBuilder).GetMethods(BindingFlags.NonPublic | BindingFlags.Instance).First(t => t.Name == "ApplyInterceptorsAndCriteria" && t.IsGenericMethod);
|
|||
|
|
|
|||
|
|
protected virtual void Reset(IQueryable queryable, IQueryCriteria criteria)
|
|||
|
|
{
|
|||
|
|
//Criteria = criteria ?? throw new ArgumentNullException("criteria");
|
|||
|
|
QueryableAtStart = queryable ?? throw new ArgumentNullException("queryable");
|
|||
|
|
CurrentQueryable = QueryableAtStart;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public virtual void AddInterceptor(IQueryInterceptor interceptor)
|
|||
|
|
{
|
|||
|
|
if (interceptor == null) throw new ArgumentNullException("interceptor");
|
|||
|
|
|
|||
|
|
if (!Interceptors.Contains(interceptor))
|
|||
|
|
Interceptors.Add(interceptor);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected virtual void ApplyInterceptorsAndCriteria<T>()
|
|||
|
|
{
|
|||
|
|
ApplySimpleBeforeAlterInterceptors();
|
|||
|
|
ApplyGenericBeforeAlterInterceptors<T>();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void ApplyInterceptorsAndCriteria()
|
|||
|
|
{
|
|||
|
|
var genericMethod = ApplyInterceptorsAndCriteriaMethod.MakeGenericMethod(QueryableUnderlyingType);
|
|||
|
|
genericMethod.Invoke(this, null);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected virtual void ApplyGenericBeforeAlterInterceptors<T>()
|
|||
|
|
{
|
|||
|
|
var interceptors = Interceptors.Where(t => t is IBeforeQueryAlteredInterceptor<T>).Cast<IBeforeQueryAlteredInterceptor<T>>().ToList();
|
|||
|
|
interceptors.ForEach(i => CurrentQueryable = i.InterceptQueryBeforeAltered(Criteria, (IQueryable<T>)CurrentQueryable));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected virtual void ApplySimpleBeforeAlterInterceptors()
|
|||
|
|
{
|
|||
|
|
var beforeAlterInterceptors = Interceptors.Where(t => t is IBeforeQueryAlteredInterceptor).Cast<IBeforeQueryAlteredInterceptor>().ToList();
|
|||
|
|
beforeAlterInterceptors.ForEach(i => CurrentQueryable = i.InterceptQueryBeforeAltered(Criteria, CurrentQueryable));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public virtual IQueryResult Execute(IQueryable queryable, IQueryCriteria criteria)
|
|||
|
|
{
|
|||
|
|
Reset(queryable, criteria);
|
|||
|
|
ApplyInterceptorsAndCriteria();
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
public virtual Task<IQueryResult> ExecuteAsync(IQueryable queryable, IQueryCriteria criteria)
|
|||
|
|
{
|
|||
|
|
throw new NotImplementedException();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|