private void BuildCompute(ComputeClause computeClause)
{
foreach (ComputeExpression computeExpression in computeClause.ComputedItems)
{
Expression expression = _visitor.TranslateNode(computeExpression.Expression);
IEdmTypeReference edmTypeReference = OeEdmClrHelper.GetEdmTypeReference(_visitor.EdmModel, expression.Type);
_navigationItem.AddSelectItem(new OeSelectItem(new ComputeProperty(computeExpression.Alias, edmTypeReference, expression), false));
}
}
private IEnumerable <KeyValuePair <String, Object> > GetKeys(T entity)
{
var visitor = new OeQueryNodeVisitor(_edmModel, Expression.Parameter(typeof(T)));
OrderByClause orderByClause = _odataUri.OrderBy;
do
{
var propertyExpression = (MemberExpression)visitor.TranslateNode(orderByClause.Expression);
UnaryExpression body = Expression.Convert(propertyExpression, typeof(Object));
Expression <Func <T, Object> > getValueLambda = Expression.Lambda <Func <T, Object> >(body, visitor.Parameter);
Object value = getValueLambda.Compile()(entity);
yield return(new KeyValuePair <String, Object>(OeSkipTokenParser.GetPropertyName(propertyExpression), value));
orderByClause = orderByClause.ThenBy;
}while (orderByClause != null);
}
private static void SetOrderByProperties(OeQueryContext queryContext, Object entity, Object value)
{
var visitor = new OeQueryNodeVisitor(queryContext.EdmModel, Expression.Parameter(typeof(T)));
var setPropertyValueVisitor = new SetPropertyValueVisitor();
int i = 0;
OrderByClause orderByClause = queryContext.ODataUri.OrderBy;
while (orderByClause != null)
{
var propertyExpression = (MemberExpression)visitor.TranslateNode(orderByClause.Expression);
Object orderValue = queryContext.SkipTokenAccessors[i++].GetValue(value);
setPropertyValueVisitor.SetPropertyValue(entity, propertyExpression, orderValue);
orderByClause = orderByClause.ThenBy;
}
}
private void SetOrderByProperties(Object entity, Object value)
{
var visitor = new OeQueryNodeVisitor(_skipTokenParser.EdmModel, Expression.Parameter(typeof(T)));
var setPropertyValueVisitor = new SetPropertyValueVisitor();
int i = 0;
OrderByClause orderByClause = _skipTokenParser.UniqueOrderBy;
while (orderByClause != null)
{
var propertyExpression = (MemberExpression)visitor.TranslateNode(orderByClause.Expression);
Object orderValue = _skipTokenParser.Accessors[i++].Accessor(value);
setPropertyValueVisitor.SetPropertyValue(entity, propertyExpression, orderValue);
orderByClause = orderByClause.ThenBy;
}
}
private MethodCallExpression ApplyCompute(Expression source, ComputeTransformationNode transformation)
{
var expressions = new List <Expression>();
Type sourceType = OeExpressionHelper.GetCollectionItemType(source.Type);
ParameterExpression sourceParameter = Expression.Parameter(sourceType);
if (_aggProperties.Count > 0)
{
var callExpression = (MethodCallExpression)source;
source = callExpression.Arguments[0];
var aggLambda = (LambdaExpression)callExpression.Arguments[1];
expressions.AddRange(((NewExpression)aggLambda.Body).Arguments);
sourceType = OeExpressionHelper.GetCollectionItemType(source.Type);
sourceParameter = aggLambda.Parameters[0];
}
OeQueryNodeVisitor visitor = CreateVisitor(sourceParameter);
if (_aggProperties.Count > 0)
{
visitor.TuplePropertyByAliasName = new ComputeAliasNameResolver(_aggProperties, expressions).GetTuplePropertyByAliasName;
}
foreach (ComputeExpression computeExpression in transformation.Expressions)
{
Expression expression = visitor.TranslateNode(computeExpression.Expression);
expressions.Add(expression);
_aggProperties.Add(CreateEdmProperty(visitor.EdmModel, expression.Type, computeExpression.Alias, false));
}
NewExpression newExpression = OeExpressionHelper.CreateTupleExpression(expressions);
MethodInfo selectMethodInfo = OeMethodInfoHelper.GetSelectMethodInfo(sourceParameter.Type, newExpression.Type);
LambdaExpression lambda = Expression.Lambda(newExpression, sourceParameter);
return(Expression.Call(selectMethodInfo, source, lambda));
}