/// <summary>
/// Tries to save the object
/// </summary>
/// <param name="obj">The object to save</param>
/// <param name="criteria">The criteria of type <see cref="Zonkey.UpdateCriteria"/>.</param>
/// <param name="affect">The <see cref="Zonkey.UpdateAffect"/> value that determines which rows to affect.</param>
/// <param name="selectBack">The <see cref="Zonkey.SelectBack"/> value that determines whether to select back the changed rows.</param>
/// <returns>A value of type <see cref="Zonkey.SaveResult"/></returns>
public SaveResult TrySave(T obj, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack)
{
var objSV = obj as ISavable;
if (objSV == null)
{
throw new ArgumentException("Save() is only supported on classes that implement Zonkey.ObjectModel.ISavable", "obj");
}
var objDCX = obj as DataClass;
// raise pre-save event
if (objDCX != null)
{
objDCX.OnBeforeSave();
}
SaveResult result;
switch (objSV.DataRowState)
{
case DataRowState.Added:
result = TryInsert(obj, selectBack);
_lastSaveSuccessType = 1;
break;
case DataRowState.Detached:
throw new InvalidOperationException("Cannot save objects in a detached state. Did you forget to use the new record constructor?");
case DataRowState.Modified:
if (((selectBack == SelectBack.None) || (selectBack == SelectBack.AllFields)) &&
(criteria <= UpdateCriteria.ChangedFields) && (affect == UpdateAffect.ChangedFields))
{
result = TryUpdate2(obj, criteria, (selectBack == SelectBack.AllFields));
}
else
{
result = TryUpdate(obj, criteria, affect, selectBack);
}
_lastSaveSuccessType = 2;
break;
default:
return(SaveResult.Skipped);
}
// raise post-save event and commit values
if (result == SaveResult.Success)
{
if (objDCX != null)
{
objDCX.OnAfterSave(true);
}
objSV.CommitValues();
}
return(result);
}
/// <summary>
/// Tries to update the specified object
/// </summary>
/// <param name="obj">The object.</param>
/// <param name="criteria">The criteria of type <see cref="Zonkey.UpdateCriteria"/>.</param>
/// <param name="affect">The <see cref="Zonkey.UpdateAffect"/> value that determines which rows to affect.</param>
/// <param name="selectBack">The <see cref="Zonkey.SelectBack"/> value that determines whether to select back the changed rows.</param>
/// <returns>A <see cref="Zonkey.SaveResult"/> value based on the outcome of the update operation.</returns>
public SaveResult TryUpdate(T obj, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack)
{
try
{
DbCommand[] commands = CommandBuilder.GetUpdateCommands(obj, criteria, affect, selectBack);
return(UpdateInternal(obj, commands, (selectBack != SelectBack.None)));
}
catch (DataException) { throw; }
catch (Exception ex)
{
throw new DataException(ex.Message, ex);
}
}
/// <summary>
/// Saves the specified object
/// </summary>
/// <param name="obj">The object to save</param>
/// <param name="criteria">The criteria of type <see cref="Zonkey.UpdateCriteria"/>.</param>
/// <param name="affect">The <see cref="Zonkey.UpdateAffect"/> value that determines which rows to affect.</param>
/// <param name="selectBack">The <see cref="Zonkey.SelectBack"/> value that determines whether to select back the changed rows.</param>
/// <returns>true/false</returns>
public bool Save(T obj, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack)
{
return(HandleSaveResult(TrySave(obj, criteria, affect, selectBack)));
}
/// <summary>
/// Saves the collection.
/// </summary>
/// <param name="collection">The collection.</param>
/// <param name="criteria">The criteria of type <see cref="Zonkey.UpdateCriteria"/>.</param>
/// <param name="affect">The <see cref="Zonkey.UpdateAffect"/> value that determines which rows to affect.</param>
/// <param name="selectBack">The <see cref="Zonkey.SelectBack"/> value that determines whether to select back the changed rows.</param>
/// <returns>A value of type <see cref="T:Zonkey.CollectionSaveResult"/></returns>
public CollectionSaveResult <T> TrySaveCollection(ICollection <T> collection, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack)
{
var colResult = new CollectionSaveResult <T>();
var bindCol = collection as ITrackDeletedItems <T>;
if (bindCol != null)
{
foreach (T obj in bindCol.DeletedItems)
{
var objSV = obj as ISavable;
if (objSV != null)
{
if (objSV.DataRowState == DataRowState.Deleted)
{
DeleteItem(obj);
colResult.Deleted.Add(obj);
}
else
{
colResult.Skipped.Add(obj);
}
}
else
{
colResult.Failed.Add(obj);
}
}
}
foreach (T obj in collection)
{
var objSV = obj as ISavable;
if (objSV != null)
{
if (objSV.DataRowState != DataRowState.Unchanged)
{
switch (TrySave(obj, criteria, affect, selectBack))
{
case SaveResult.Skipped:
colResult.Skipped.Add(obj);
break;
case SaveResult.Conflict:
colResult.Conflicted.Add(obj);
break;
case SaveResult.Fail:
colResult.Failed.Add(obj);
break;
case SaveResult.Success:
if (_lastSaveSuccessType == 1)
{
colResult.Inserted.Add(obj);
}
else
{
colResult.Updated.Add(obj);
}
break;
}
}
else
{
colResult.Skipped.Add(obj);
}
}
else
{
colResult.Failed.Add(obj);
}
}
return(colResult);
}
/// <summary>
/// Saves the collection.
/// </summary>
/// <param name="collection">The collection.</param>
/// <param name="criteria">The criteria.</param>
/// <param name="affect">The affect.</param>
/// <param name="selectBack">The select back.</param>
/// <returns></returns>
public int SaveCollection(ICollection <T> collection, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack)
{
var result = TrySaveCollection(collection, criteria, affect, selectBack);
if ((result.Conflicted.Count > 0) || (result.Failed.Count > 0))
{
throw new CollectionSaveException <T>(result);
}
return(result.Inserted.Count + result.Updated.Count);
}
public DbCommand[] GetUpdateCommands(object obj, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
if (obj.GetType() != _dataObjectType)
{
throw new ArgumentException("Type of 'obj' does not match type from constructor.");
}
// set update criteria - default is changed fields
if (criteria == UpdateCriteria.Default)
{
criteria = (_dataMap.DataItem.UpdateCriteria == UpdateCriteria.Default)
? UpdateCriteria.ChangedFields : _dataMap.DataItem.UpdateCriteria;
}
if ((criteria == UpdateCriteria.KeyAndVersion) && (!_dialect.SupportsRowVersion))
{
criteria = UpdateCriteria.ChangedFields;
}
// set select back default
if (selectBack == SelectBack.Default)
{
selectBack = (_dataMap.DataItem.SelectBack == SelectBack.Default)
? SelectBack.UnchangedFields : _dataMap.DataItem.SelectBack;
}
// get savable obj
var objSV = obj as ISavable;
if (objSV == null)
{
affect = UpdateAffect.AllFields;
if (selectBack == SelectBack.UnchangedFields)
{
selectBack = SelectBack.AllFields;
}
if (criteria == UpdateCriteria.ChangedFields)
{
criteria = UpdateCriteria.KeyOnly;
}
}
// init command array
DbCommand updateCommand = GetTextCommand("");
// create string builders and param lists
var setString = new StringBuilder();
var setParmList = new List <DbParameter>();
var whereString = new StringBuilder();
var whereParmList = new List <DbParameter>();
var selectString = new StringBuilder();
var keyString = new StringBuilder();
var keyParmList = new List <DbParameter>();
foreach (IDataMapField field in _dataMap.DataFields)
{
PropertyInfo pi = field.Property;
if (pi == null)
{
continue;
}
bool hasChanged = (objSV != null) ? HasFieldChanged(pi, objSV) : true;
string sFieldDescr = _dialect.FormatFieldName(field.FieldName, (field.UseQuotedIdentifier ?? UseQuotedIdentifier));
if (selectBack > SelectBack.None)
{
if (field.IsKeyField)
{
DbParameter keyParam = CreateWhereParam(updateCommand, field);
if (keyString.Length > 0)
{
keyString.Append(" AND ");
}
keyString.Append(sFieldDescr);
keyString.Append(" = ");
keyString.Append(keyParam.ParameterName);
keyParam.Value = pi.GetValue(obj, null);
keyParmList.Add(keyParam);
}
else if ((selectBack == SelectBack.AllFields) ||
((selectBack == SelectBack.UnchangedFields) && (!hasChanged)) ||
((selectBack >= SelectBack.IdentityOrVersion) && (field.IsRowVersion)))
{
if (selectString.Length > 0)
{
selectString.Append(", ");
}
selectString.Append(sFieldDescr);
}
}
if (field.IsKeyField ||
(hasChanged && (criteria >= UpdateCriteria.ChangedFields)) ||
(field.IsRowVersion && (criteria == UpdateCriteria.KeyAndVersion))
)
{
// A primary key or row version
if (whereString.Length > 0)
{
whereString.Append(" AND ");
}
// get value for parameter
object oParmValue;
if ((objSV != null) && (objSV.OriginalValues.ContainsKey(pi.Name)))
{
oParmValue = (objSV.OriginalValues[pi.Name] ?? DBNull.Value);
}
else
{
oParmValue = (pi.GetValue(obj, null) ?? DBNull.Value);
}
// add to command
if (Convert.IsDBNull(oParmValue))
{
whereString.AppendFormat("{0} IS NULL", sFieldDescr);
}
else if (!field.IsComparable)
{
whereString.AppendFormat("{0} IS NOT NULL", sFieldDescr);
}
else
{
DbParameter whereParam = CreateWhereParam(updateCommand, field);
whereString.Append(sFieldDescr);
whereString.Append(" = ");
whereString.Append(whereParam.ParameterName);
whereParam.Value = oParmValue;
whereParmList.Add(whereParam);
}
}
if ((field.IsAutoIncrement) || (field.IsRowVersion) || (field.AccessType == AccessType.ReadOnly))
{
continue;
}
if ((affect == UpdateAffect.ChangedFields) && (!hasChanged))
{
continue;
}
if (setString.Length > 0)
{
setString.Append(", ");
}
DbParameter setParm = CreateSetParam(updateCommand, field);
setString.Append(sFieldDescr);
setString.Append(" = ");
setString.Append(setParm.ParameterName);
setParm.Value = (pi.GetValue(obj, null) ?? DBNull.Value);
setParmList.Add(setParm);
}
if (setParmList.Count == 0)
{
return(null);
}
if (whereString.Length == 0)
{
throw new InvalidOperationException(String.Format("Class '{0}' does not contain any properties with DataFieldAttributes or none are marked with IsKeyField.", _dataObjectType.FullName));
}
updateCommand.CommandText = String.Format("UPDATE {0} SET {1} WHERE {2};", SaveToTable, setString, whereString);
updateCommand.Parameters.AddRange(setParmList.ToArray());
updateCommand.Parameters.AddRange(whereParmList.ToArray());
if ((selectBack > SelectBack.None) && (selectString.Length > 0))
{
if (keyString.Length == 0)
{
throw new InvalidOperationException(String.Format("Class '{0}' does not contain any properties with DataFieldAttributes or none are marked with IsKeyField.", _dataObjectType.FullName));
}
DbCommand selectCommand = GetTextCommand("");
selectCommand.CommandText = String.Format("SELECT {0} FROM {1} WHERE {2};", selectString, TableName, keyString);
selectCommand.Parameters.AddRange(keyParmList.ToArray());
return(new[] { updateCommand, selectCommand });
}
// return null index 1 to indicate no select-back
return(new[] { updateCommand, null });
}
/// <summary>
/// Equivalent to calling DataClassAdapter.Save
/// </summary>
/// <typeparam name="Tdc">The type of the dc.</typeparam>
/// <param name="obj">The obj.</param>
/// <param name="updateCriteria">The update criteria</param>
/// <param name="updateAffect">Affect which fields</param>
/// <param name="selectBack">Select what back</param>
/// <returns></returns>
public virtual bool Save <Tdc>(Tdc obj, UpdateCriteria updateCriteria, UpdateAffect updateAffect, SelectBack selectBack)
where Tdc : class, ISavable, new()
{
return(Adapter <Tdc>().Save(obj, updateCriteria, updateAffect, selectBack));
}
/// <summary>
/// Saves the collection.
/// </summary>
/// <param name="collection">The collection.</param>
/// <param name="criteria">The criteria of type <see cref="Zonkey.UpdateCriteria"/>.</param>
/// <param name="affect">The <see cref="Zonkey.UpdateAffect"/> value that determines which rows to affect.</param>
/// <param name="selectBack">The <see cref="Zonkey.SelectBack"/> value that determines whether to select back the changed rows.</param>
/// <param name="continueOnError">if set to <c>true</c> continues past errors.</param>
/// <returns>
/// A value of type <see cref="Zonkey.CollectionSaveResult{T}"/>
/// </returns>
public CollectionSaveResult <T> TrySaveCollection(ICollection <T> collection, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack, bool continueOnError)
{
var colResult = new CollectionSaveResult <T>();
var bindCol = collection as ITrackDeletedItems <T>;
if (bindCol != null)
{
foreach (T obj in bindCol.DeletedItems)
{
var objSV = obj as ISavable;
if (objSV != null)
{
if (objSV.DataRowState == DataRowState.Deleted)
{
try
{
DeleteItem(obj);
}
catch (Exception ex)
{
colResult.Exceptions.Add(new CollectionSaveExceptionItem <T>(obj, ex));
if (!continueOnError)
{
throw;
}
}
colResult.Deleted.Add(obj);
}
else
{
colResult.Skipped.Add(obj);
}
}
else
{
colResult.Failed.Add(obj);
}
}
}
foreach (T obj in collection)
{
var objSV = obj as ISavable;
if (objSV != null)
{
if (objSV.DataRowState != DataRowState.Unchanged)
{
try
{
SaveResult saveResult = TrySave(obj, criteria, affect, selectBack);
switch (saveResult.Status)
{
case SaveResultStatus.Skipped:
colResult.Skipped.Add(obj);
break;
case SaveResultStatus.Conflict:
colResult.Conflicted.Add(obj);
break;
case SaveResultStatus.Fail:
colResult.Failed.Add(obj);
break;
case SaveResultStatus.Success:
if (saveResult.SaveType == SaveType.Insert)
{
colResult.Inserted.Add(obj);
}
else
{
colResult.Updated.Add(obj);
}
break;
}
}
catch (Exception ex)
{
colResult.Exceptions.Add(new CollectionSaveExceptionItem <T>(obj, ex));
if (!continueOnError)
{
throw;
}
}
}
else
{
colResult.Skipped.Add(obj);
}
}
else
{
colResult.Failed.Add(obj);
}
}
return(colResult);
}
/// <summary>
/// Saves the collection.
/// </summary>
/// <param name="collection">The collection.</param>
/// <param name="criteria">The criteria of type <see cref="Zonkey.UpdateCriteria"/>.</param>
/// <param name="affect">The <see cref="Zonkey.UpdateAffect"/> value that determines which rows to affect.</param>
/// <param name="selectBack">The <see cref="Zonkey.SelectBack"/> value that determines whether to select back the changed rows.</param>
/// <returns>A value of type <see cref="Zonkey.CollectionSaveResult{T}"/></returns>
public CollectionSaveResult <T> TrySaveCollection(ICollection <T> collection, UpdateCriteria criteria, UpdateAffect affect, SelectBack selectBack)
{
return(TrySaveCollection(collection, UpdateCriteria.Default, UpdateAffect.ChangedFields, SelectBack.Default, false));
}
