internal void RollBack(EntityBase entityBase)
{
Replace(entityBase);
}
/// <summary>
/// Replaces core data from the specified field (FieldInfo) in entity.
/// </summary>
protected void ReplaceForFieldInfo(FieldInfo fi, EntityBase entity)
{
// if the field is a NuSoft Framework entity or entityList, then we need to take care to
// preserve the currently existing entity and entityList instantiated objects as the consumer may
// have reference to them (ie. data bound to a presentation control)
if ((fi.FieldType.IsGenericType) && (fi.FieldType.GetGenericTypeDefinition().Equals(typeof(EntityList <>))))
{
System.Collections.IList entityListSource = fi.GetValue(entity) as System.Collections.IList;
System.Collections.IList entityListTarget = fi.GetValue(this) as System.Collections.IList;
if ((entityListSource == null) && (entityListTarget != null))
{
// un-lazy load the private member of the source so that the entityList items are visible... after loading the items, then the
// "if ((entityList != null) && (entityListSource != null))" clause will be hit below, effectively adding the items to the already-
// existing entityList instantiated object.
string memberName = fi.Name;
if (memberName.IndexOf('_') == 0)
{
string propertyName = memberName.Substring(1, 1).ToUpper() + memberName.Substring(2);
PropertyInfo propertyInfo = this.GetType().GetProperty(propertyName);
if (propertyInfo != null)
{
// we're not going to do anything with entityListForProperty... we just access it get the the entityList lazily-loaded.
System.Collections.IList entityListForProperty = propertyInfo.GetValue(entity, null) as System.Collections.IList;
entityListSource = fi.GetValue(entity) as System.Collections.IList;
entityListTarget = fi.GetValue(this) as System.Collections.IList;
}
}
}
if ((entityListTarget != null) && (entityListSource != null))
{
// todo:mjj move this section to entityList.Replace(entityList)
for (int i = entityListTarget.Count - 1; i >= 0; i--)
{
EntityBase entityTarget = (EntityBase)entityListTarget[i];
EntityBase entitySource = (EntityBase)((ISearchable)entityListSource).GetEntityById(entityTarget.UniqueIdentifier);
if (entityTarget.IsDeleted)
{
entityListTarget.Remove(entityTarget);
}
else if (entitySource != null)
{
entityTarget.Replace(entitySource);
}
else
{
entityListTarget.Remove(entityTarget);
}
}
foreach (EntityBase entitySource in entityListSource)
{
EntityBase entityTarget = (EntityBase)((ISearchable)entityListTarget).GetEntityById(entitySource.UniqueIdentifier);
if (entityTarget == null)
{
entityListTarget.Add(entitySource);
}
}
}
else if ((entityListSource != null) && (entityListTarget == null))
{
SetFieldValueAndTriggerPropertyChangedEvent(this, fi, ((ICloneable)fi.GetValue(entity)).Clone());
}
else
{
SetFieldValueAndTriggerPropertyChangedEvent(this, fi, fi.GetValue(entity));
}
}
else if (fi.FieldType.IsSubclassOf(typeof(EntityBase)))
{
EntityBase entityBaseTarget = fi.GetValue(this) as EntityBase;
EntityBase entityBaseSource = fi.GetValue(entity) as EntityBase;
if ((entityBaseSource == null) && (entityBaseTarget != null))
{
// provoke source entity's corresponding property to get it lazily loaded
string memberName = fi.Name;
if (memberName.IndexOf('_') == 0)
{
string propertyName = memberName.Substring(1, 1).ToUpper() + memberName.Substring(2);
PropertyInfo propertyInfo = this.GetType().GetProperty(propertyName);
if (propertyInfo != null)
{
// we're not going to do anything with entityBase... we just access it to get it lazily-loaded.
EntityBase entityBase = propertyInfo.GetValue(entity, null) as EntityBase;
entityBaseSource = fi.GetValue(entity) as EntityBase;
}
}
}
if ((entityBaseTarget != null) && (entityBaseSource != null))
{
if (entityBaseTarget.UniqueIdentifier == entityBaseSource.UniqueIdentifier)
{
entityBaseTarget.Replace(entityBaseSource);
}
else
{
SetFieldValueAndTriggerPropertyChangedEvent(this, fi, fi.GetValue(entity));
}
}
else if ((entityBaseSource != null) && (entityBaseTarget == null))
{
SetFieldValueAndTriggerPropertyChangedEvent(this, fi, ((ICloneable)fi.GetValue(entity)).Clone());
}
else
{
SetFieldValueAndTriggerPropertyChangedEvent(this, fi, fi.GetValue(entity));
}
}
else
{
SetFieldValueAndTriggerPropertyChangedEvent(this, fi, fi.GetValue(entity));
}
}
/// <summary>
/// Replaces data from the specified property (PropertyInfo) in entity.
/// </summary>
protected void ReplaceForPropertyInfo(PropertyInfo propertyInfo, EntityBase entity)
{
// If the setter method of the property is not public, then don't process it. This will exclude ID fields, for instance.
if (propertyInfo.GetSetMethod(false) != null)
{
// if the property is a NuSoft Framework entity or entityList, then we need to take care to
// preserve the currently existing entity and entityList instantiated objects as the consumer may
// have reference to them (ie. data bound to a presentation control)
// if the property is an entityList...
if ((propertyInfo.PropertyType.IsGenericType) && (propertyInfo.PropertyType.GetGenericTypeDefinition().Equals(typeof(EntityList <>))))
{
// Get the source object's private member that corresponds to the property (ie. the property backer).
// If it's value is not null, then let's get the collection's members and merge them into the target's collection.
// A null collection for the source does not mean that the target should then be null; it only means that the
// source's collection was never lazily loaded.
string propertyName = propertyInfo.Name;
string memberName = "_" + propertyName.Substring(0, 1).ToLower() + propertyName.Substring(1);
FieldInfo fieldInfo = this.GetType().GetField(memberName, BINDINGS_PRIVATE_INSTANCES);
if ((fieldInfo != null) && ((fieldInfo.GetValue(entity) as System.Collections.IList) != null))
{
// By virture of unique identifer...
// - Exists in source collection, and exists in target collection, then merge to target collection
// - Exists in source, but not is target, add to target.
// - Doesn't exist in source, and doesn't exist in target, do nothing.
// - Doesn't exist in source, but does in target, delete/remove from source.
System.Collections.IList entityListSource = propertyInfo.GetValue(entity, null) as System.Collections.IList;
System.Collections.IList entityListTarget = propertyInfo.GetValue(this, null) as System.Collections.IList;
for (int i = entityListTarget.Count - 1; i >= 0; i--)
{
EntityBase entityTarget = (EntityBase)entityListTarget[i];
if (!entityTarget.IsDeleted)
{
EntityBase entitySource = (EntityBase)((ISearchable)entityListSource).GetEntityById(entityTarget.UniqueIdentifier);
if (entitySource != null)
{
entityTarget.Merge(entitySource);
}
else
{
entityListTarget.Remove(entityTarget);
}
}
}
foreach (EntityBase entitySource in entityListSource)
{
EntityBase entityTarget = (EntityBase)((ISearchable)entityListTarget).GetEntityById(entitySource.UniqueIdentifier);
if (entityTarget == null)
{
entityListTarget.Add(entitySource);
}
else if (entitySource.IsDeleted)
{
entityTarget.SetDeleted(true);
}
}
}
}
// else if the property is an entity...
else if (propertyInfo.PropertyType.IsSubclassOf(typeof(EntityBase)))
{
EntityBase entityBaseTarget = propertyInfo.GetValue(this, null) as EntityBase;
EntityBase entityBaseSource = propertyInfo.GetValue(entity, null) as EntityBase;
if ((entityBaseTarget != null) && (entityBaseSource != null))
{
if (entityBaseTarget.UniqueIdentifier == entityBaseSource.UniqueIdentifier)
{
entityBaseTarget.Replace(entityBaseSource);
}
else if (propertyInfo.CanWrite)
{
propertyInfo.SetValue(this, propertyInfo.GetValue(entity, null), null);
}
}
else if ((entityBaseSource != null) && (entityBaseTarget == null))
{
if (propertyInfo.CanWrite)
{
propertyInfo.SetValue(this, ((ICloneable)propertyInfo.GetValue(entity, null)).Clone(), null);
}
}
else
{
if (propertyInfo.CanWrite)
{
propertyInfo.SetValue(this, propertyInfo.GetValue(entity, null), null);
}
}
}
else // just copy the value or object
{
if (propertyInfo.CanWrite)
{
propertyInfo.SetValue(this, propertyInfo.GetValue(entity, null), null);
}
}
}
}
