internal override void Initialize()
{
foreach (TreeNode treeNode in this.OwnerNode.Ancestors(true))
{
DataElementsTreeNode dataElementsTreeNode = treeNode as DataElementsTreeNode;
if (dataElementsTreeNode != null && dataElementsTreeNode.InterfaceType == this.ParentFilterType)
{
this.ParentFilterTypeTreeNode = dataElementsTreeNode;
break;
}
}
bool dataItemAttachmentPointExists =
this.OwnerNode.Tree.AttachmentPoints.OfType <IDataItemAttachmentPoint>().Any(f => f.InterfaceType == this.ParentFilterType) ||
this.OwnerNode.Tree.PossibleAttachmentPoints.OfType <IDataItemAttachmentPoint>().Any(f => f.InterfaceType == this.ParentFilterType);
if (this.ParentFilterTypeTreeNode != null || dataItemAttachmentPointExists)
{
this.KeyPropertyInfo = this.ParentFilterType.GetKeyProperties()[0];
}
if (this.KeyPropertyInfo == null)
{
AddValidationError("TreeValidationError.ParentIdFilterNode.TypeIsNotInParentTree", this.ParentFilterType);
}
this.ReferencePropertyInfo = this.OwnerNode.InterfaceType.GetPropertiesRecursively().SingleOrDefault(f => f.Name == this.ReferenceFieldName);
if (this.ReferencePropertyInfo == null)
{
AddValidationError("TreeValidationError.Common.MissingProperty", this.OwnerNode.InterfaceType, this.ReferenceFieldName);
}
}
/// <exclude />
public void SetOwnerNode(TreeNode treeNode)
{
this.OwnerNode = (DataElementsTreeNode)treeNode;
}
private static Expression CreateInnerExpression(TreeNodeDynamicContext dynamicContext, ParentIdFilterNode parentIdFilterNode, DataElementsTreeNode dataElementsTreeNode, bool includeJoin = true)
{
Type interfaceType = dataElementsTreeNode.CurrentDataInterfaceType;
ParameterExpression parameterExpression = Expression.Parameter(interfaceType, "innerData");
List <int> filtersToSkip = new List <int>()
{
parentIdFilterNode.Id
};
foreach (ParentIdFilterNode childParentIdFilterNode in dataElementsTreeNode.FilterNodes.OfType <ParentIdFilterNode>().Where(f => f.Id != parentIdFilterNode.Id))
{
if (childParentIdFilterNode.ParentFilterTypeTreeNode.IsAncestor(parentIdFilterNode.ParentFilterTypeTreeNode))
{
filtersToSkip.Add(childParentIdFilterNode.Id);
}
}
Expression filterExpression = dataElementsTreeNode.CreateAccumulatedFilterExpression(parameterExpression, interfaceType, dynamicContext, filtersToSkip);
Expression whereExpression = ExpressionHelper.CreateWhereExpression(DataFacade.GetData(interfaceType).Expression, parameterExpression, filterExpression);
if ((includeJoin) && (dataElementsTreeNode.JoinDataElementsTreeNode != null))
{
//MRJ: Multiple Parent Filter: Recursive call, so we would have to make multiple recursive calls
Expression innerInnerExpression = CreateInnerExpression(dynamicContext, dataElementsTreeNode.JoinParentIdFilterNode, dataElementsTreeNode.JoinDataElementsTreeNode);
// Create join lambda expressions
PropertyInfo outerKeyPropertyInfo = dataElementsTreeNode.KeyPropertyInfo;
LambdaExpression outerKeySelectorExpression = Expression.Lambda(Expression.Property(parameterExpression, outerKeyPropertyInfo), parameterExpression);
Type innerKeyType = TypeHelpers.FindElementType(innerInnerExpression);
ParameterExpression innerKeySelectorParameterExpression = Expression.Parameter(innerKeyType, "innerKeyParam");
LambdaExpression innerKeySelectorExpression = Expression.Lambda(innerKeySelectorParameterExpression, innerKeySelectorParameterExpression);
ParameterExpression parameterExpression1 = Expression.Parameter(dataElementsTreeNode.CurrentDataInterfaceType, "param1");
ParameterExpression parameterExpression2 = Expression.Parameter(outerKeyPropertyInfo.PropertyType, "param2");
LambdaExpression resultSelector = Expression.Lambda(parameterExpression1, parameterExpression1, parameterExpression2);
Expression joinExpression = ExpressionHelper.CreateJoinExpression(
whereExpression,
innerInnerExpression,
outerKeySelectorExpression,
innerKeySelectorExpression,
resultSelector);
whereExpression = joinExpression;
}
Expression selectExpression = ExpressionHelper.CreateSelectExpression(whereExpression, ExpressionHelper.CreatePropertyExpression(parentIdFilterNode.ReferenceFieldName, parameterExpression), parameterExpression);
Expression distinctExpression = ExpressionHelper.CreateDistinctExpression(selectExpression);
return(distinctExpression);
}
/// <summary>
/// This method finds the callers tree node own entity token by searching up/down using filters.
/// In some cases this can be expensive.
/// </summary>
/// <param name="treeNode"></param>
/// <param name="entityToken"></param>
/// <param name="dynamicContext"></param>
/// <returns></returns>
private EntityToken FindOwnEntityToken(TreeNode treeNode, EntityToken entityToken, TreeNodeDynamicContext dynamicContext)
{
DataElementsTreeNode dataElementsTreeNode = treeNode as DataElementsTreeNode;
if (dataElementsTreeNode != null)
{
if (dataElementsTreeNode.InterfaceType == this.OwnerNode.InterfaceType) // We found it :)
{
return(entityToken);
}
}
TreeDataFieldGroupingElementEntityToken dataFieldGroupingElementEntityToken = entityToken as TreeDataFieldGroupingElementEntityToken;
if (dataFieldGroupingElementEntityToken != null) // Search 'downwards'
{
ParameterExpression parameterExpression = Expression.Parameter(this.OwnerNode.InterfaceType, "data");
DataKeyPropertyCollection dataKeyPropertyCollection = new DataKeyPropertyCollection();
dataKeyPropertyCollection.AddKeyProperty("Id", dataFieldGroupingElementEntityToken.ChildGeneratingDataElementsReferenceValue);
Type dataType = dataFieldGroupingElementEntityToken.ChildGeneratingDataElementsReferenceType;
IData parentData = DataFacade.GetDataByUniqueKey(dataType, dataKeyPropertyCollection);
TreeNodeDynamicContext dummyContext = new TreeNodeDynamicContext(TreeNodeDynamicContextDirection.Down);
dummyContext.CustomData.Add("ParentData", parentData);
IData resultData;
if (this.OwnerNode.InterfaceType == TypeManager.GetType(dataFieldGroupingElementEntityToken.Type))
{
Expression filterExpression = this.CreateDownwardsFilterExpression(parameterExpression, dummyContext);
Expression whereExpression = ExpressionHelper.CreateWhereExpression(DataFacade.GetData(this.OwnerNode.InterfaceType).Expression, parameterExpression, filterExpression);
resultData = (IData)DataFacade.GetData(this.OwnerNode.InterfaceType).Provider.CreateQuery(whereExpression).ToEnumerableOfObjects().First();
}
else
{
resultData = parentData;
}
return(resultData.GetDataEntityToken());
}
AncestorResult ancestorResult = treeNode.GetParentEntityToken(entityToken, this.ParentFilterType, dynamicContext);
if ((this.OwnerNode.Id == ancestorResult.TreeNode.Id) || (this.OwnerNode.IsDescendant(ancestorResult.TreeNode))) // Search upwards
{
return(FindOwnEntityToken(ancestorResult.TreeNode, ancestorResult.EntityToken, dynamicContext));
}
// Search 'downwards' by using the parent datas key value to get
DataElementsTreeNode parentDataElementsTreeNode = (DataElementsTreeNode)ancestorResult.TreeNode;
if (this.ParentFilterType == parentDataElementsTreeNode.InterfaceType)
{
DataEntityToken dataEntityToken = (DataEntityToken)ancestorResult.EntityToken;
ParameterExpression parameterExpression = Expression.Parameter(this.OwnerNode.InterfaceType, "data");
TreeNodeDynamicContext dummyContext = new TreeNodeDynamicContext(TreeNodeDynamicContextDirection.Down);
dummyContext.CustomData.Add("ParentData", dataEntityToken.Data);
Expression filterExpression = this.CreateDownwardsFilterExpression(parameterExpression, dummyContext);
Expression whereExpression = ExpressionHelper.CreateWhereExpression(DataFacade.GetData(this.OwnerNode.InterfaceType).Expression, parameterExpression, filterExpression);
IData resultData = (IData)DataFacade.GetData(this.OwnerNode.InterfaceType).Provider.CreateQuery(whereExpression).ToEnumerableOfObjects().First();
return(resultData.GetDataEntityToken());
}
throw new InvalidOperationException("Missing parent id filtering or try to simplify the parent id filterings (Unable to find own entity token)");
}
private static Expression CreateInnerExpression(TreeNodeDynamicContext dynamicContext, ParentIdFilterNode parentIdFilterNode, DataElementsTreeNode dataElementsTreeNode, bool includeJoin = true)
{
Type interfaceType = dataElementsTreeNode.CurrentDataInterfaceType;
ParameterExpression parameterExpression = Expression.Parameter(interfaceType, "innerData");
List<int> filtersToSkip = new List<int>() { parentIdFilterNode.Id };
foreach (ParentIdFilterNode childParentIdFilterNode in dataElementsTreeNode.FilterNodes.OfType<ParentIdFilterNode>().Where(f => f.Id != parentIdFilterNode.Id))
{
if (childParentIdFilterNode.ParentFilterTypeTreeNode.IsAncestor(parentIdFilterNode.ParentFilterTypeTreeNode))
{
filtersToSkip.Add(childParentIdFilterNode.Id);
}
}
Expression filterExpression = dataElementsTreeNode.CreateAccumulatedFilterExpression(parameterExpression, interfaceType, dynamicContext, filtersToSkip);
Expression whereExpression = ExpressionHelper.CreateWhereExpression(DataFacade.GetData(interfaceType).Expression, parameterExpression, filterExpression);
if ((includeJoin) && (dataElementsTreeNode.JoinDataElementsTreeNode != null))
{
//MRJ: Multiple Parent Filter: Recursive call, so we would have to make multiple recursive calls
Expression innerInnerExpression = CreateInnerExpression(dynamicContext, dataElementsTreeNode.JoinParentIdFilterNode, dataElementsTreeNode.JoinDataElementsTreeNode);
// Create join lambda expressions
PropertyInfo outerKeyPropertyInfo = dataElementsTreeNode.KeyPropertyInfo;
LambdaExpression outerKeySelectorExpression = Expression.Lambda(Expression.Property(parameterExpression, outerKeyPropertyInfo), parameterExpression);
Type innerKeyType = TypeHelpers.FindElementType(innerInnerExpression);
ParameterExpression innerKeySelectorParameterExpression = Expression.Parameter(innerKeyType, "innerKeyParam");
LambdaExpression innerKeySelectorExpression = Expression.Lambda(innerKeySelectorParameterExpression, innerKeySelectorParameterExpression);
ParameterExpression parameterExpression1 = Expression.Parameter(dataElementsTreeNode.CurrentDataInterfaceType, "param1");
ParameterExpression parameterExpression2 = Expression.Parameter(outerKeyPropertyInfo.PropertyType, "param2");
LambdaExpression resultSelector = Expression.Lambda(parameterExpression1, parameterExpression1, parameterExpression2);
Expression joinExpression = ExpressionHelper.CreateJoinExpression(
whereExpression,
innerInnerExpression,
outerKeySelectorExpression,
innerKeySelectorExpression,
resultSelector);
whereExpression = joinExpression;
}
Expression selectExpression = ExpressionHelper.CreateSelectExpression(whereExpression, ExpressionHelper.CreatePropertyExpression(parentIdFilterNode.ReferenceFieldName, parameterExpression), parameterExpression);
Expression distinctExpression = ExpressionHelper.CreateDistinctExpression(selectExpression);
return distinctExpression;
}
/// <exclude />
public void SetOwnerNode(TreeNode treeNode)
{
this.OwnerNode = (DataElementsTreeNode)treeNode;
}
