/// <summary>
/// Mark property as not updatable. Not updatable properties
/// will not be updated after inserted. Not updatable properties
/// will not be checked against database to define if value of property
/// has been changed.
/// </summary>
/// <exception cref="ArgumentException">
/// When not appropriate or already marked property is marked.
/// </exception>
/// <returns>Current ExtendedPropertyHelper.</returns>
public ExtendedPropertyHelper <T> NotUpdatable()
{
var sourceType = typeof(T);
if (!Property.PropertyType.GetUnderlyingType().IsBuiltinType())
{
throw new ArgumentException(string.Format(
"Property '{0}' for '{1}' is inappropriate property to set as not updatable.\n" +
"Only properties underlying type of which is built in types can be set as not updatable.",
Property.Name,
typeof(T).Name));
}
var markedNotUpdatable =
MappingStorage.Instance.NotUpdatableProperties
.Where(m => m.SourceType.Equals(typeof(T)))
.FirstOrDefault();
if (markedNotUpdatable == null)
{
markedNotUpdatable = new PropertiesWithSource()
{
SourceType = typeof(T)
}
}
;
var alreadyAdded = markedNotUpdatable.Properties
.Any(m => Property.Name.Equals(m.Name));
if (alreadyAdded)
{
return(this);
}
markedNotUpdatable.Properties.Add(Property);
if (!MappingStorage.Instance.NotUpdatableProperties.Contains(markedNotUpdatable))
{
MappingStorage.Instance.NotUpdatableProperties.Add(markedNotUpdatable);
}
return(this);
}
}
/// <summary>
/// Mark properties as unique.
/// </summary>
/// <exception cref="ArgumentNullException">
/// When lambda expression is null.
/// </exception>
/// <exception cref="ArgumentException">
/// When lambda expression deos not select any property.
/// When lambda expression selects not appropriate properties.
/// When lambda expression selects already selected combination
/// of properties to set as unique.
/// </exception>
/// <typeparam name="TProperty">Type of property.</typeparam>
/// <param name="propertyLambda">Lambda expression to mark properties as unique.</param>
public void HasUnique <TProperty>(
Expression <Func <TEntity, TProperty> > propertyLambda)
{
if (propertyLambda == null)
{
throw new ArgumentNullException("propertyLambda");
}
var markedProperties = propertyLambda.GetPropertyInfoList();
if (markedProperties == null ||
markedProperties.Count == 0)
{
throw new ArgumentException(string.Format(
"Expression '{0}' for '{1}' marks no property to set as unique",
propertyLambda.ToString(),
typeof(TEntity).Name));
}
// Selects properties which are not appropriate to set as unique
var violatedProperties = markedProperties
.Where(m => m.PropertyType.IsCollectionType() ||
(!m.PropertyType.IsBuiltinType() &&
(!m.PropertyType.IsEnum &&
!m.PropertyType.IsNullableEnum())));
if (violatedProperties != null &&
violatedProperties.Count() > 0)
{
throw new ArgumentException(string.Format(
"Expression '{0}' for '{1}' selects inappropriate properties to set unique.\n" +
"Only built in value types or enums can be set as unique.",
propertyLambda.ToString(),
typeof(TEntity).Name));
}
var markedAsUnique = new PropertiesWithSource()
{
SourceType = typeof(TEntity),
Properties = markedProperties
};
var duplicates = MappingStorage.Instance.UniqueProperties
.Where(m => m.SourceType.Equals(markedAsUnique.SourceType) &&
m.Properties
.Select(p => p.Name)
.OrderBy(p => p)
.SequenceEqual(markedAsUnique
.Properties
.Select(p => p.Name)
.OrderBy(p => p)));
if (duplicates.Any())
{
return;
}
if (!MappingStorage.Instance.UniqueProperties.Contains(markedAsUnique))
{
MappingStorage.Instance.UniqueProperties.Add(markedAsUnique);
}
}
/// <summary>
/// Mark properties state of which has to be defined before entity itself
/// in order to be able to correctly define state of entity itself. These properties
/// are those uniqueness of which can be determined easily according to their
/// property values. Properties from which state of entity is dependant from
/// and which are in one-to-one relationship with this entity should be marked.
/// Parents of entity or entities which are in many-to-one relationship with this entity
/// should not be marked, they are automatically ordered.
/// </summary>
/// <exception cref="ArgumentNullException">
/// When lambda expression is null.
/// </exception>
/// <exception cref="ArgumentException">
/// When lambda expression selects no property at all.
/// When lambda expression selects inappropriate properties to define state of.
/// When lambda expression selects already selected property to define state of.
/// </exception>
/// <typeparam name="TProperty">Type of property.</typeparam>
/// <param name="propertyLambda">Lambda expression to get properties
/// state of which must be defined.</param>
public void HasStateDefiner <TProperty>(
Expression <Func <TEntity, TProperty> > propertyLambda)
{
if (propertyLambda == null)
{
throw new ArgumentNullException("propertyLambda");
}
var markedProperties = propertyLambda.GetPropertyInfoList();
if (markedProperties == null ||
markedProperties.Count == 0)
{
throw new ArgumentException(string.Format(
"Expression '{0}' for '{1}' marks no property to define state of",
propertyLambda.ToString(),
typeof(TEntity).Name));
}
// Selects properties which are not appropriate to set as to define sate of
var violatedProperties = markedProperties
.Where(m => m.PropertyType.IsValueType ||
(m.PropertyType.IsBuiltinType() &&
m.PropertyType.IsCollectionType() &&
m.PropertyType.IsGenericType &&
(m.PropertyType
.GenericTypeArguments
.FirstOrDefault()
.IsBuiltinType() ||
!m.PropertyType
.GenericTypeArguments
.FirstOrDefault()
.IsClass)));
if (violatedProperties != null &&
violatedProperties.Count() > 0)
{
throw new ArgumentException(string.Format(
"Expression '{0}' for '{1}' selects inappropriate properties to define state of.\n" +
"Only properties of user defined class type or collections of those classes" +
"can be set to define state of",
propertyLambda.ToString(),
typeof(TEntity).Name));
}
var markedToDefineStateOf = MappingStorage.Instance.StateDefiners
.Where(m => m.SourceType.Equals(typeof(TEntity)))
.FirstOrDefault();
if (markedToDefineStateOf == null)
{
markedToDefineStateOf = new PropertiesWithSource()
{
SourceType = typeof(TEntity)
}
}
;
var alreadyAdded = markedToDefineStateOf.Properties
.Any(m => markedProperties
.Select(p => p.Name)
.Contains(m.Name));
if (alreadyAdded)
{
return;
}
markedToDefineStateOf.Properties.AddRange(markedProperties);
if (!MappingStorage.Instance.StateDefiners.Contains(markedToDefineStateOf))
{
MappingStorage.Instance.StateDefiners.Add(markedToDefineStateOf);
}
}
/// <summary>
/// Compare entity and entity from source and detect which properties
/// have been changed. Prepare changed proeprties for update.
/// </summary>
/// <exception cref="ArgumentNullException">
/// When entity or entityFromSource is null.
/// </exception>
/// <param name="entity">Current entity to compare.</param>
/// <param name="entityFromSource">Entity from source to compare.</param>
/// <returns>True if any of propeties has been changed/False otherwise.</returns>
public bool DetectPropertyChanges(
TEntity entity,
TEntity entityFromSource)
{
if (entity == null)
{
throw new ArgumentNullException(nameof(entity));
}
if (entityFromSource == null)
{
throw new ArgumentNullException(nameof(entityFromSource));
}
bool anyPropertyHasChanged = false;
IEnumerable <string> primaryKeyNames = GetPrimaryKeys();
PropertiesWithSource notToCompareConfiguration = MappingStorage
.Instance
.PropertiesNotToCompare
.Where(m => m.SourceType.Equals(typeof(TEntity)))
.FirstOrDefault();
PropertiesWithSource notUpdatableConfiguration = MappingStorage
.Instance
.NotUpdatableProperties
.Where(m => m.SourceType.Equals(typeof(TEntity)))
.FirstOrDefault();
IEnumerable <string> propertiesNotToCompare;
IEnumerable <string> notUpdatableProperties;
if (notToCompareConfiguration != null)
{
propertiesNotToCompare = notToCompareConfiguration
.Properties
.Select(m => m.Name);
}
else
{
propertiesNotToCompare = new List <string>();
}
if (notUpdatableConfiguration != null)
{
notUpdatableProperties = notUpdatableConfiguration
.Properties
.Select(m => m.Name);
}
else
{
notUpdatableProperties = new List <string>();
}
// Get properties to compare
List <string> propertiesToCompare = GetSimpleEntityProperties()
.Where(m => !primaryKeyNames.Contains(m.Name) &&
!propertiesNotToCompare.Contains(m.Name) &&
!notUpdatableProperties.Contains(m.Name))
.Select(m => m.Name)
.ToList();
DbEntityEntry <TEntity> entry = Context.Entry(entity);
foreach (string propertyName in propertiesToCompare)
{
var currentValue = entity.GetPropertyValue(propertyName);
var sourceValue = entityFromSource.GetPropertyValue(propertyName);
if (!Utilities.IsEqual(
entity.GetPropertyValue(propertyName),
entityFromSource.GetPropertyValue(propertyName)))
{
anyPropertyHasChanged = true;
entry.Property(propertyName).IsModified = true;
}
}
// If any properties has changed also update
// properties which marked not to compare
if (anyPropertyHasChanged)
{
foreach (string propertyName in propertiesNotToCompare.Except(notUpdatableProperties))
{
Context.Entry(entity)
.Property(propertyName).IsModified = true;
}
}
return(anyPropertyHasChanged);
}
