/// <summary>
/// 根据对比差异分析变动实体
/// </summary>
/// <param name="difference"></param>
/// <returns></returns>
private ChangeEntry ResolveChangeEntry(Difference difference)
{
ChangeEntry change = new ChangeEntry();
change.Type = this.ResolveChangeType(difference);
if (change.Type == ChangeEntryType.Addition || change.Type == ChangeEntryType.Remove)
{
change.OriginalEntry = difference.Object1;
change.NewestEntry = difference.Object2;
}
else
{
change.OriginalEntry = difference.ParentObject1;
change.NewestEntry = difference.ParentObject2;
}
change.Navigation = difference.ParentPropertyName;
return(change);
}
public void AddChanger(ChangeEntry change)
{
if (change.Type == ChangeEntryType.Remove)
{
this.DeleteEntry.Add(change);
}
else
{
var c = this.GetChanger(change.NewestEntry);
if (c != null)
{
c = change;
}
else
{
this.ChangersEntry.Add(change.NewestEntry.GetHashCode(), change);
}
}
}
public IChangeManager Create(ComparisonResult comparisonResult)
{
changeManager.ClearChanger();
if (comparisonResult.AreEqual)
{
return(changeManager);
}
//根据实体与快照的差异进行分析实体的变动
foreach (var difference in comparisonResult.Differences)
{
ChangeEntry change = this.ResolveChangeEntry(difference);
if (change.Type == ChangeEntryType.Addition || change.Type == ChangeEntryType.Remove)
{
this.changeManager.AddChanger(change);
if (change.Type == ChangeEntryType.Addition)
{
//如果为新增类型，需要进一步分析实体中的值对象
var values = this.ResolveChangeObjectValue(change);
foreach (var item in values)
{
this.changeManager.AddChanger(item);
}
}
}
else
{
var change2 = this.changeManager.GetChanger(change.NewestEntry);
if (change2 == null)
{
this.changeManager.AddChanger(change);
change2 = change;
}
//解析修改的字段
ChangeEntryPropertys changeProperty = this.ResolveChangeEntryPropertys(difference);
change2.ChangePropertys.Add(changeProperty);
}
}
return(changeManager);
}
/// <summary>
/// 分析变动实体中值对象
/// </summary>
/// <param name="entry"></param>
/// <returns></returns>
private List <ChangeEntry> ResolveChangeObjectValue(ChangeEntry entry)
{
var objectValues = entry.EntryType.GetProperties()
.Where(f => typeof(IValueObject).IsAssignableFrom(f.PropertyType))
.ToList();
List <ChangeEntry> entries = new List <ChangeEntry>();
foreach (var ov in objectValues)
{
var value = ov.GetValue(entry.NewestEntry);
if (value == null)
{
continue;
}
ChangeEntry change = new ChangeEntry();
change.Type = ChangeEntryType.Addition;
change.NewestEntry = value;
entries.Add(change);
}
return(entries);
}
