public Expression CreateExpression(IQueryable query, OeConstantToVariableVisitor constantToVariableVisitor)
{
Expression expression;
var expressionBuilder = new OeExpressionBuilder(EdmModel, EntitySetAdapter.EntityType);
expression = Expression.Constant(null, typeof(IEnumerable <>).MakeGenericType(EntitySetAdapter.EntityType));
expression = expressionBuilder.ApplyNavigation(expression, ParseNavigationSegments);
expression = expressionBuilder.ApplyFilter(expression, ODataUri.Filter);
expression = expressionBuilder.ApplySkipToken(expression, SkipTokenParser, ODataUri.SkipToken);
expression = expressionBuilder.ApplyAggregation(expression, ODataUri.Apply);
expression = expressionBuilder.ApplySelect(expression, this);
expression = expressionBuilder.ApplyOrderBy(expression, ODataUri.OrderBy);
expression = expressionBuilder.ApplySkip(expression, ODataUri.Skip, ODataUri.Path);
expression = expressionBuilder.ApplyTake(expression, ODataUri.Top, ODataUri.Path);
expression = expressionBuilder.ApplyCount(expression, IsCountSegment);
if (!IsCountSegment)
{
EntryFactory = CreateEntryFactory(expressionBuilder);
}
expression = constantToVariableVisitor.Translate(expression, expressionBuilder.Constants);
if (ODataUri.QueryCount.GetValueOrDefault())
{
CountExpression = CreateCountExpression(query, expression);
}
return(SourceVisitor.Translate(query, expression));
}
public Expression CreateExpression(OeConstantToVariableVisitor constantToVariableVisitor)
{
Expression expression;
var expressionBuilder = new OeExpressionBuilder(EdmModel, EntitySetAdapter.EntityType);
expression = Expression.Constant(null, typeof(IEnumerable <>).MakeGenericType(EntitySetAdapter.EntityType));
expression = expressionBuilder.ApplyNavigation(expression, ParseNavigationSegments);
expression = expressionBuilder.ApplyFilter(expression, ODataUri.Filter);
expression = expressionBuilder.ApplySkipToken(expression, SkipTokenNameValues, ODataUri.OrderBy, IsDatabaseNullHighestValue);
expression = expressionBuilder.ApplyAggregation(expression, ODataUri.Apply);
expression = expressionBuilder.ApplySelect(expression, this);
expression = expressionBuilder.ApplyOrderBy(expression, ODataUri.OrderBy);
expression = expressionBuilder.ApplySkip(expression, ODataUri.Skip, ODataUri.Path);
expression = expressionBuilder.ApplyTake(expression, ODataUri.Top, ODataUri.Path);
expression = expressionBuilder.ApplyCount(expression, IsCountSegment);
if (!IsCountSegment)
{
EntryFactory = CreateEntryFactory(expressionBuilder);
}
if (SkipTokenNameValues != null)
{
SkipTokenAccessors = OeSkipTokenParser.GetAccessors(expression, ODataUri.OrderBy);
}
return(constantToVariableVisitor.Translate(expression, expressionBuilder.Constants));
}
public override Expression Translate(ExpandedNavigationSelectItem item)
{
var segment = (NavigationPropertySegment)item.PathToNavigationProperty.LastSegment;
Expression expression = Translate(segment);
Type navigationItemType = expression.Type;
Type itemType = OeExpressionHelper.GetCollectionItemType(navigationItemType);
if (itemType != null)
{
var expressionBuilder = new OeExpressionBuilder(_model, itemType);
expression = expressionBuilder.ApplyFilter(expression, item.FilterOption);
expression = expressionBuilder.ApplyOrderBy(expression, item.OrderByOption);
var path = new ODataPath(_path.Union(item.PathToNavigationProperty));
expression = expressionBuilder.ApplySkip(expression, item.SkipOption, path);
expression = expressionBuilder.ApplyTake(expression, item.TopOption, path);
foreach (KeyValuePair <ConstantExpression, ConstantNode> constant in expressionBuilder.Constants)
{
_visitor.AddConstant(constant.Key, constant.Value);
}
}
Expression countExpression = null;
if (item.CountOption.GetValueOrDefault())
{
MethodInfo countMethodInfo = OeMethodInfoHelper.GetCountMethodInfo(itemType);
countExpression = Expression.Call(countMethodInfo, expression);
}
if (item.SelectAndExpand.SelectedItems.Any())
{
var path = new ODataPath(_path.Union(item.PathToNavigationProperty));
var selectTranslator = new OeSelectTranslator(_visitor, path);
Expression nestedExpression = selectTranslator.CreateExpression(expression, item.SelectAndExpand, OeMetadataLevel.Minimal);
Type nestedType = OeExpressionHelper.GetCollectionItemType(nestedExpression.Type);
if (nestedType == null)
{
var visitor = new ParameterVisitor(selectTranslator._parameter, expression);
nestedExpression = visitor.Visit(nestedExpression);
nestedType = nestedExpression.Type;
}
_selectItemInfo.EntryFactory = selectTranslator.CreateNestedEntryFactory(nestedType, _selectItemInfo.EntitySet, _selectItemInfo.ResourceInfo);
expression = nestedExpression;
}
if (countExpression != null)
{
return(CreateNavigationLinkInfo(navigationItemType, expression, countExpression));
}
return(expression);
}
public Expression CreateExpression(out IReadOnlyDictionary <ConstantExpression, ConstantNode> constants)
{
Initialize();
Expression expression;
var expressionBuilder = new OeExpressionBuilder(_joinBuilder);
IEdmEntitySet entitySet = OeEdmClrHelper.GetEntitySet(EdmModel, EntitySetAdapter.EntitySetName);
expression = OeEnumerableStub.CreateEnumerableStubExpression(EntitySetAdapter.EntityType, entitySet);
expression = expressionBuilder.ApplyNavigation(expression, ParseNavigationSegments);
if (ODataUri.Apply == null)
{
expression = expressionBuilder.ApplyFilter(expression, ODataUri.Filter);
expression = expressionBuilder.ApplySelect(expression, this);
}
else
{
expression = expressionBuilder.ApplyAggregation(expression, ODataUri.Apply);
expression = expressionBuilder.ApplyFilter(expression, ODataUri.Filter);
expression = expressionBuilder.ApplySkipToken(expression, SkipTokenNameValues, ODataUri.OrderBy, IsDatabaseNullHighestValue); //order by aggregation
expression = expressionBuilder.ApplyOrderBy(expression, ODataUri.OrderBy);
expression = expressionBuilder.ApplySkip(expression, ODataUri.Skip, ODataUri.Path);
expression = expressionBuilder.ApplyTake(expression, ODataUri.Top, ODataUri.Path);
}
if (ODataUri.Path.LastSegment is CountSegment)
{
expression = expressionBuilder.ApplyCount(expression, true);
}
else
{
OePropertyAccessor[] skipTokenAccessors = OeSkipTokenParser.GetAccessors(expression, ODataUri.OrderBy, _joinBuilder);
EntryFactory = CreateEntryFactory(expressionBuilder, skipTokenAccessors);
}
constants = expressionBuilder.Constants;
return(expression);
}
public Expression CreateExpression(IQueryable query, OeConstantToVariableVisitor constantToVariableVisitor)
{
Expression expression;
var expressionBuilder = new OeExpressionBuilder(EdmModel, EntitySetAdapter.EntityType);
expression = Expression.Constant(null, typeof(IEnumerable <>).MakeGenericType(EntitySetAdapter.EntityType));
expression = expressionBuilder.ApplyNavigation(expression, ParseNavigationSegments);
expression = expressionBuilder.ApplyFilter(expression, ODataUri.Filter);
expression = expressionBuilder.ApplyAggregation(expression, ODataUri.Apply);
expression = expressionBuilder.ApplySelect(expression, ODataUri.SelectAndExpand, ODataUri.Path, Headers.MetadataLevel);
expression = expressionBuilder.ApplyOrderBy(expression, ODataUri.OrderBy);
expression = expressionBuilder.ApplySkip(expression, ODataUri.Skip, ODataUri.Path);
expression = expressionBuilder.ApplyTake(expression, ODataUri.Top, ODataUri.Path);
expression = expressionBuilder.ApplyCount(expression, IsCountSegment);
if (!IsCountSegment)
{
EntryFactory = CreateEntryFactory(expressionBuilder);
}
expression = constantToVariableVisitor.Translate(expression, expressionBuilder.Constants);
return(SourceVisitor.Translate(query, expression));
}
public Expression CreateExpression(OeConstantToVariableVisitor constantToVariableVisitor)
{
Expression expression;
var expressionBuilder = new OeExpressionBuilder(JoinBuilder);
IEdmEntitySet entitySet = OeEdmClrHelper.GetEntitySet(EdmModel, EntitySetAdapter.EntitySetName);
expression = OeEnumerableStub.CreateEnumerableStubExpression(EntitySetAdapter.EntityType, entitySet);
expression = expressionBuilder.ApplyNavigation(expression, ParseNavigationSegments);
expression = expressionBuilder.ApplyFilter(expression, ODataUri.Filter);
if (ODataUri.Apply == null)
{
expression = expressionBuilder.ApplySelect(expression, this);
}
else
{
expression = expressionBuilder.ApplySkipToken(expression, SkipTokenNameValues, ODataUri.OrderBy, IsDatabaseNullHighestValue);
expression = expressionBuilder.ApplyAggregation(expression, ODataUri.Apply);
expression = expressionBuilder.ApplyOrderBy(expression, ODataUri.OrderBy);
expression = expressionBuilder.ApplySkip(expression, ODataUri.Skip, ODataUri.Path);
expression = expressionBuilder.ApplyTake(expression, ODataUri.Top, ODataUri.Path);
}
expression = expressionBuilder.ApplyCount(expression, IsCountSegment);
if (!IsCountSegment)
{
EntryFactory = CreateEntryFactory(expressionBuilder);
}
if (SkipTokenNameValues != null)
{
SkipTokenAccessors = OeSkipTokenParser.GetAccessors(expression, ODataUri.OrderBy, JoinBuilder);
}
return(constantToVariableVisitor.Translate(expression, expressionBuilder.Constants));
}
public override SelectItemInfo Translate(ExpandedNavigationSelectItem item)
{
var segment = (NavigationPropertySegment)item.PathToNavigationProperty.LastSegment;
if (_navigationNextLink && segment.NavigationProperty.Type is IEdmCollectionTypeReference)
{
return(null);
}
SelectItemInfo selectItemInfo = CreateNavigationSelectItemInfo(_model, segment, false, item.CountOption);
PropertyInfo navigationClrProperty = _parameter.Type.GetProperty(selectItemInfo.EdmProperty.Name);
Expression expression = Expression.MakeMemberAccess(_parameter, navigationClrProperty);
Type itemType = OeExpressionHelper.GetCollectionItemType(expression.Type);
if (itemType != null)
{
var expressionBuilder = new OeExpressionBuilder(_model, itemType);
expression = expressionBuilder.ApplyFilter(expression, item.FilterOption);
expression = expressionBuilder.ApplyOrderBy(expression, item.OrderByOption);
var path = new ODataPath(_path.Union(item.PathToNavigationProperty));
expression = expressionBuilder.ApplySkip(expression, item.SkipOption, path);
expression = expressionBuilder.ApplyTake(expression, item.TopOption, path);
foreach (KeyValuePair <ConstantExpression, ConstantNode> constant in expressionBuilder.Constants)
{
_visitor.AddConstant(constant.Key, constant.Value);
}
}
if (item.SelectAndExpand.SelectedItems.Any())
{
var path = new ODataPath(_path.Union(item.PathToNavigationProperty));
var selectTranslator = new OeSelectTranslator(_visitor, path);
ParameterExpression parameter = Expression.Parameter(itemType ?? expression.Type);
selectTranslator.BuildSelect(item.SelectAndExpand, expression, parameter, _metadataLevel, _navigationNextLink);
Expression nestedExpression;
Type nestedType;
if (itemType == null)
{
nestedExpression = selectTranslator.CreateTupleExpression();
var visitor = new ParameterVisitor(parameter, expression, segment.NavigationProperty.Type.IsNullable);
nestedExpression = visitor.Visit(nestedExpression);
nestedType = nestedExpression.Type;
}
else
{
nestedExpression = selectTranslator.CreateSelectExpression(expression, parameter);
nestedType = OeExpressionHelper.GetCollectionItemType(nestedExpression.Type);
}
selectItemInfo.EntryFactory = selectTranslator.CreateNestedEntryFactory(nestedType, selectItemInfo.EntitySet, selectItemInfo.Resource);
expression = nestedExpression;
}
selectItemInfo.Expression = expression;
return(selectItemInfo);
}