/**
* Return a new query based on this query with an additional where clause added.
* @param json Json representation of the where clause.
* @return A new EntityQuery.
*/
public EntityQuery Where(string json)
{
var qmap = JsonConvert.DeserializeObject <Dictionary <string, object> >(json);
var pred = BasePredicate.PredicateFromMap(qmap);
return(this.Where(pred));
}
/**
* Materializes the serialized json representation of an EntityQuery.
* @param json The serialized json version of the EntityQuery.
*/
public EntityQuery(string json)
{
if (json == null || json.Length == 0)
{
return;
}
Dictionary <string, object> qmap;
try {
var dmap = JsonHelper.Deserialize(json);
qmap = (Dictionary <string, object>)dmap;
} catch (Exception) {
throw new Exception(
"This EntityQuery ctor requires a valid json string. The following is not json: "
+ json);
}
this._resourceName = GetMapValue <string>(qmap, "resourceName");
this._skipCount = GetMapInt(qmap, "skip");
this._takeCount = GetMapInt(qmap, "take");
this._wherePredicate = BasePredicate.PredicateFromMap(GetMapValue <Dictionary <string, object> >(qmap, "where"));
this._orderByClause = OrderByClause.From(GetMapValue <List <object> >(qmap, "orderBy"));
this._selectClause = SelectClause.From(GetMapValue <List <object> >(qmap, "select"));
this._expandClause = ExpandClause.From(GetMapValue <List <object> >(qmap, "expand"));
this._parameters = GetMapValue <Dictionary <string, object> >(qmap, "parameters");
this._inlineCountEnabled = GetMapValue <bool?>(qmap, "inlineCount");
}
public static IQueryable ApplyWhere(IQueryable source, Type elementType, BasePredicate predicate)
{
var method = TypeFns.GetMethodByExample((IQueryable <string> q) => q.Where(s => s != null), elementType);
var lambdaExpr = predicate.ToLambda(elementType);
var func = BuildIQueryableFunc(elementType, method, lambdaExpr);
return(func(source));
}
/**
* Copy constructor
* @param query
*/
public EntityQuery(EntityQuery query)
{
this._resourceName = query._resourceName;
this._skipCount = query._skipCount;
this._takeCount = query._takeCount;
this._wherePredicate = query._wherePredicate;
this._orderByClause = query._orderByClause;
this._selectClause = query._selectClause;
this._expandClause = query._expandClause;
this._inlineCountEnabled = query._inlineCountEnabled;
this._parameters = query._parameters;
}
/**
* Return a new query based on this query with an additional where clause added.
* @param predicate A Predicate representing the where clause to add.
* @return A new EntityQuery.
*/
public EntityQuery Where(BasePredicate predicate)
{
var eq = new EntityQuery(this);
if (eq._wherePredicate == null)
{
eq._wherePredicate = predicate;
}
else if (eq._wherePredicate.Operator == Operator.And)
{
var andOrPred = (AndOrPredicate)eq._wherePredicate;
var preds = new List <BasePredicate>(andOrPred.Predicates);
preds.Add(predicate);
eq._wherePredicate = new AndOrPredicate(Operator.And, preds);
}
else
{
eq._wherePredicate = new AndOrPredicate(Operator.And,
eq._wherePredicate, predicate);
}
return(eq);
}
public UnaryPredicate(Operator op, BasePredicate predicate) : base(op)
{
Predicate = predicate;
}
public AnyAllPredicate(Operator op, object exprSource, BasePredicate predicate) : base(op)
{
ExprSource = exprSource;
Predicate = predicate;
}