BusinessBase.cs

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//-----------------------------------------------------------------------
// <copyright file="BusinessBase.cs" company="Marimer LLC">
//     Copyright (c) Marimer LLC. All rights reserved.
//     Website: https://cslanet.com
// </copyright>
// <summary>This is the base class from which most business objects</summary>
//-----------------------------------------------------------------------
using System;
using System.ComponentModel;
using System.Linq.Expressions;
using System.Reflection;
using Csla.Properties;
using Csla.Core;
using Csla.Reflection;
using System.Threading.Tasks;
 
namespace Csla
{
 
  [Serializable]
  public abstract class BusinessBase<T> :
    Core.BusinessBase, Core.ISavable, Core.ISavable<T>, IBusinessBase where T : BusinessBase<T>
  {
 
    #region Object ID Value
 
    protected virtual object GetIdValue()
    {
      return null;
    }
 
    #endregion
 
    #region System.Object Overrides
 
    public override string ToString()
    {
      object id = GetIdValue();
      if (id == null)
        return base.ToString();
      else
        return id.ToString();
    }
 
    #endregion
 
    #region Clone
 
    public T Clone()
    {
      return (T)GetClone();
    }
 
    #endregion
 
    #region Data Access
 
    public T Save()
    {
      try
      {
        return SaveAsync(false, null, true).Result;
      }
      catch (AggregateException ex)
      {
        if (ex.InnerExceptions.Count > 0)
          throw ex.InnerExceptions[0];
        else
          throw;
      }
    }
 
    public async Task<T> SaveAsync()
    {
      return await SaveAsync(false);
    }
 
    public async Task<T> SaveAsync(bool forceUpdate)
    {
      return await SaveAsync(forceUpdate, null, false);
    }
 
    protected async virtual Task<T> SaveAsync(bool forceUpdate, object userState, bool isSync)
    {
      if (forceUpdate && IsNew)
      {
        // mark the object as old - which makes it
        // not dirty
        MarkOld();
        // now mark the object as dirty so it can save
        MarkDirty(true);
      }
      T result = default;
      if (this.IsChild)
        throw new InvalidOperationException(Resources.NoSaveChildException);
      if (EditLevel > 0)
        throw new InvalidOperationException(Resources.NoSaveEditingException);
      if (!IsValid && !IsDeleted)
        throw new Rules.ValidationException(Resources.NoSaveInvalidException);
      if (IsBusy)
        throw new InvalidOperationException(Resources.BusyObjectsMayNotBeSaved);
      if (IsDirty)
      {
        var dp = ApplicationContext.CreateInstanceDI<DataPortal<T>>();
        if (isSync)
        {
          result = dp.Update((T)this);
        }
        else
        {
          if (ApplicationContext.AutoCloneOnUpdate)
            MarkBusy();
          try
          {
            result = await dp.UpdateAsync((T)this);
          }
          finally
          {
            if (ApplicationContext.AutoCloneOnUpdate)
            {
              if (result != null)
                result.MarkIdle();
              MarkIdle();
            }
          }
        }
      }
      else
      {
        result = (T)this;
      }
      OnSaved(result, null, userState);
      return result;
    }
 
    public T Save(bool forceUpdate)
    {
      if (forceUpdate && IsNew)
      {
        // mark the object as old - which makes it
        // not dirty
        MarkOld();
        // now mark the object as dirty so it can save
        MarkDirty(true);
      }
      return this.Save();
    }
 
    public async Task SaveAndMergeAsync()
    {
      await SaveAndMergeAsync(false);
    }
 
    public async Task SaveAndMergeAsync(bool forceUpdate)
    {
      new GraphMerger(ApplicationContext).MergeGraph(this, await SaveAsync(forceUpdate));
    }
 
    #endregion
 
    #region ISavable Members
 
    void Csla.Core.ISavable.SaveComplete(object newObject)
    {
      OnSaved((T)newObject, null, null);
    }
 
    void Csla.Core.ISavable<T>.SaveComplete(T newObject)
    {
      OnSaved(newObject, null, null);
    }
 
    object Csla.Core.ISavable.Save()
    {
      return Save();
    }
 
    object Csla.Core.ISavable.Save(bool forceUpdate)
    {
      return Save(forceUpdate);
    }
 
    [NonSerialized]
    [NotUndoable]
    private EventHandler<Csla.Core.SavedEventArgs> _nonSerializableSavedHandlers;
    [NotUndoable]
    private EventHandler<Csla.Core.SavedEventArgs> _serializableSavedHandlers;
 
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design",
      "CA1062:ValidateArgumentsOfPublicMethods")]
    public event EventHandler<Csla.Core.SavedEventArgs> Saved
    {
      add
      {
        if (value.Method.IsPublic &&
           (value.Method.DeclaringType.IsSerializable ||
            value.Method.IsStatic))
          _serializableSavedHandlers = (EventHandler<Csla.Core.SavedEventArgs>)
            System.Delegate.Combine(_serializableSavedHandlers, value);
        else
          _nonSerializableSavedHandlers = (EventHandler<Csla.Core.SavedEventArgs>)
            System.Delegate.Combine(_nonSerializableSavedHandlers, value);
      }
      remove
      {
        if (value.Method.IsPublic &&
           (value.Method.DeclaringType.IsSerializable ||
            value.Method.IsStatic))
          _serializableSavedHandlers = (EventHandler<Csla.Core.SavedEventArgs>)
            System.Delegate.Remove(_serializableSavedHandlers, value);
        else
          _nonSerializableSavedHandlers = (EventHandler<Csla.Core.SavedEventArgs>)
            System.Delegate.Remove(_nonSerializableSavedHandlers, value);
      }
    }
 
    async Task<object> ISavable.SaveAsync()
    {
      return await SaveAsync();
    }
 
    async Task<object> ISavable.SaveAsync(bool forceUpdate)
    {
      return await SaveAsync(forceUpdate);
    }
 
    [EditorBrowsable(EditorBrowsableState.Advanced)]
    protected virtual void OnSaved(T newObject, Exception e, object userState)
    {
      Csla.Core.SavedEventArgs args = new Csla.Core.SavedEventArgs(newObject, e, userState);
      if (_nonSerializableSavedHandlers != null)
        _nonSerializableSavedHandlers.Invoke(this, args);
      if (_serializableSavedHandlers != null)
        _serializableSavedHandlers.Invoke(this, args);
    }
 
    #endregion
 
    #region  Register Properties/Methods
 
    protected static PropertyInfo<P> RegisterProperty<P>(PropertyInfo<P> info)
    {
      return Core.FieldManager.PropertyInfoManager.RegisterProperty<P>(typeof(T), info);
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(string propertyName)
    {
      return RegisterProperty(Csla.Core.FieldManager.PropertyInfoFactory.Factory.Create<P>(typeof(T), propertyName));
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(Expression<Func<T, object>> propertyLambdaExpression)
    {
      PropertyInfo reflectedPropertyInfo = Reflect<T>.GetProperty(propertyLambdaExpression);
      return RegisterProperty<P>(reflectedPropertyInfo.Name);
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(string propertyName, RelationshipTypes relationship)
    {
      return RegisterProperty(Csla.Core.FieldManager.PropertyInfoFactory.Factory.Create<P>(typeof(T), propertyName, string.Empty, relationship));
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(Expression<Func<T, object>> propertyLambdaExpression, RelationshipTypes relationship)
    {
      PropertyInfo reflectedPropertyInfo = Reflect<T>.GetProperty(propertyLambdaExpression);
      return RegisterProperty<P>(reflectedPropertyInfo.Name, relationship);
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(string propertyName, string friendlyName)
    {
      return RegisterProperty(Csla.Core.FieldManager.PropertyInfoFactory.Factory.Create<P>(typeof(T), propertyName, friendlyName));
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(Expression<Func<T, object>> propertyLambdaExpression, string friendlyName)
    {
      PropertyInfo reflectedPropertyInfo = Reflect<T>.GetProperty(propertyLambdaExpression);
      return RegisterProperty<P>(reflectedPropertyInfo.Name, friendlyName);
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(string propertyName, string friendlyName, P defaultValue)
    {
      return RegisterProperty(Csla.Core.FieldManager.PropertyInfoFactory.Factory.Create<P>(typeof(T), propertyName, friendlyName, defaultValue));
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(Expression<Func<T, object>> propertyLambdaExpression, string friendlyName, P defaultValue)
    {
      PropertyInfo reflectedPropertyInfo = Reflect<T>.GetProperty(propertyLambdaExpression);
      return RegisterProperty(reflectedPropertyInfo.Name, friendlyName, defaultValue);
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(string propertyName, string friendlyName, P defaultValue, RelationshipTypes relationship)
    {
      return RegisterProperty(Csla.Core.FieldManager.PropertyInfoFactory.Factory.Create<P>(typeof(T), propertyName, friendlyName, defaultValue, relationship));
    }
 
    protected static PropertyInfo<P> RegisterProperty<P>(Expression<Func<T, object>> propertyLambdaExpression, string friendlyName, P defaultValue, RelationshipTypes relationship)
    {
      PropertyInfo reflectedPropertyInfo = Reflect<T>.GetProperty(propertyLambdaExpression);
      return RegisterProperty(reflectedPropertyInfo.Name, friendlyName, defaultValue, relationship);
    }
 
    protected static MethodInfo RegisterMethod(string methodName)
    {
      return RegisterMethod(typeof(T), methodName);
    }
 
    protected static MethodInfo RegisterMethod(Expression<Action<T>> methodLambdaExpression)
    {
      System.Reflection.MethodInfo reflectedMethodInfo = Reflect<T>.GetMethod(methodLambdaExpression);
      return RegisterMethod(reflectedMethodInfo.Name);
    }
 
    #endregion
  }
}