57 lines
2.9 KiB
C#
57 lines
2.9 KiB
C#
using PoweredSoft.Data.Core;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Threading;
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using System.Threading.Tasks;
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namespace PoweredSoft.Data
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{
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public class AsyncQueryableService : IAsyncQueryableService
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{
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public AsyncQueryableService(IEnumerable<IAsyncQueryableHandlerService> asyncQueryableFactories)
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{
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AsyncQueryableFactories = asyncQueryableFactories;
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}
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public IEnumerable<IAsyncQueryableHandlerService> AsyncQueryableFactories { get; }
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public Task<int> CountAsync<T>(IQueryable<T> queryable, CancellationToken cancellationToken = default(CancellationToken))
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=> GetAsyncQueryableHandlerOrThrow(queryable).CountAsync(queryable, cancellationToken);
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public Task<T> FirstOrDefaultAsync<T>(IQueryable<T> queryable, CancellationToken cancellationToken = default(CancellationToken))
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=> GetAsyncQueryableHandlerOrThrow(queryable).FirstOrDefaultAsync(queryable, cancellationToken);
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public Task<T> FirstOrDefaultAsync<T>(IQueryable<T> queryable, Expression<Func<T, bool>> predicate, CancellationToken cancellationToken = default(CancellationToken))
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=> GetAsyncQueryableHandlerOrThrow(queryable).FirstOrDefaultAsync(queryable, predicate, cancellationToken);
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private IAsyncQueryableHandlerService GetAsyncQueryableHandlerOrThrow<T>(IQueryable<T> queryable)
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{
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var handler = this.GetAsyncQueryableHandler(queryable);
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if (handler == null)
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throw new NoAsyncQueryableHandlerServiceWasRegisteredForThisProviderException();
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return handler;
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}
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public IAsyncQueryableHandlerService GetAsyncQueryableHandler<T>(IQueryable<T> queryable)
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{
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var handler = AsyncQueryableFactories.FirstOrDefault(t => t.CanHandle(queryable));
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return handler;
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}
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public Task<long> LongCountAsync<T>(IQueryable<T> queryable, CancellationToken cancellationToken = default(CancellationToken))
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=> GetAsyncQueryableHandlerOrThrow(queryable).LongCountAsync(queryable, cancellationToken);
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public Task<List<T>> ToListAsync<T>(IQueryable<T> queryable, CancellationToken cancellationToken = default(CancellationToken))
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=> GetAsyncQueryableHandlerOrThrow(queryable).ToListAsync(queryable, cancellationToken);
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public Task<bool> AnyAsync<T>(IQueryable<T> queryable, Expression<Func<T, bool>> predicate, CancellationToken cancellationToken = default(CancellationToken))
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=> GetAsyncQueryableHandlerOrThrow(queryable).AnyAsync(queryable, predicate, cancellationToken);
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public Task<bool> AnyAsync<T>(IQueryable<T> queryable, CancellationToken cancellationToken = default(CancellationToken))
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=> GetAsyncQueryableHandlerOrThrow(queryable).AnyAsync(queryable, cancellationToken);
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}
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}
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