public ExpressionBuilderParameters(ParameterExpression[] parameters, IQueryProvider queryProvider, Type elementType, IXmlNamespaceResolver namespaceResolver, bool mayRootPathBeImplied, IOperatorImplementationProvider operatorImplementationProvider, Func<Type, IXmlNamespaceResolver, XPathTypeNavigator> navigatorCreator=null)
{
Debug.Assert(parameters!=null);
if (parameters==null)
throw new ArgumentNullException("parameters");
Debug.Assert(parameters.Length>0);
if (parameters.Length==0)
throw new ArgumentException(
string.Format(
CultureInfo.CurrentCulture,
SR.ArrayShouldHaveElementsException,
1,
parameters.Length
),
"parameters"
);
Debug.Assert(queryProvider!=null);
if (queryProvider==null)
throw new ArgumentNullException("queryProvider");
Debug.Assert(elementType!=null);
if (elementType==null)
throw new ArgumentNullException("elementType");
Parameters=new ReadOnlyCollection<ParameterExpression>(parameters);
ElementType=elementType;
QueryProvider=queryProvider;
NamespaceResolver=namespaceResolver;
MayRootPathBeImplied=mayRootPathBeImplied;
OperatorImplementationProvider=operatorImplementationProvider;
NavigatorCreator=navigatorCreator;
}
internal LambdaExpression CreateLambda(IQueryable source, XmlNamespaceManager namespaceManager, bool mayRootPathBeImplied, IOperatorImplementationProvider operatorImplementationProvider, Func<Type, IXmlNamespaceResolver, XPathTypeNavigator> navigatorCreator=null)
{
Expression body=null;
ParameterExpression[] parameters=new ParameterExpression[] {
Expression.Parameter(source.ElementType)
};
if (Untyped.Elements().Any())
{
var ebp=new ExpressionBuilderParameters(parameters, source.Provider, source.ElementType, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider, navigatorCreator);
Type st=typeof(bool);
if (logicOps!=null)
body=logicOps.CreateExpression(ebp, st, null);
else if (comparisonOps!=null)
body=comparisonOps.CreateExpression(ebp, st, null);
else if (spatialOps!=null)
body=spatialOps.CreateExpression(ebp, st, null);
} else if (string.IsNullOrWhiteSpace(Untyped.Value))
body=Expression.Constant(true, typeof(bool));
if (body==null)
throw new ArgumentException(
string.Format(
CultureInfo.InvariantCulture,
SR.InvalidFilterDefinitionException,
Untyped.Value
)
);
return Expression.Lambda(body, parameters);
}
public ExpressionBuilderParameters(ParameterExpression[] parameters, IQueryProvider queryProvider, Type elementType, IXmlNamespaceResolver namespaceResolver, bool mayRootPathBeImplied, IOperatorImplementationProvider operatorImplementationProvider, Func <Type, IXmlNamespaceResolver, XPathTypeNavigator> navigatorCreator = null)
{
Debug.Assert(parameters != null);
if (parameters == null)
{
throw new ArgumentNullException("parameters");
}
Debug.Assert(parameters.Length > 0);
if (parameters.Length == 0)
{
throw new ArgumentException(
string.Format(
CultureInfo.CurrentCulture,
SR.ArrayShouldHaveElementsException,
1,
parameters.Length
),
"parameters"
);
}
Debug.Assert(queryProvider != null);
if (queryProvider == null)
{
throw new ArgumentNullException("queryProvider");
}
Debug.Assert(elementType != null);
if (elementType == null)
{
throw new ArgumentNullException("elementType");
}
Parameters = new ReadOnlyCollection <ParameterExpression>(parameters);
ElementType = elementType;
QueryProvider = queryProvider;
NamespaceResolver = namespaceResolver;
MayRootPathBeImplied = mayRootPathBeImplied;
OperatorImplementationProvider = operatorImplementationProvider;
NavigatorCreator = navigatorCreator;
}
public static IQueryable Where(this IQueryable source, string constraint, XmlNamespaceManager namespaceManager = null, bool mayRootPathBeImplied = false, IOperatorImplementationProvider operatorImplementationProvider = null)
{
Debug.Assert(source != null);
if (source == null)
{
throw new ArgumentNullException("source");
}
Debug.Assert(!string.IsNullOrEmpty(constraint));
if (constraint == null)
{
throw new ArgumentNullException("constraint");
}
var parser = new Parser(LanguageData);
ParseTree tree = parser.Parse(constraint);
if (tree.ParserMessages.Count > 0)
{
var logger = LogManager.GetCurrentClassLogger();
var exl = new List <Exception>();
foreach (LogMessage lm in tree.ParserMessages)
{
switch (lm.Level)
{
case ErrorLevel.Error:
logger.Error(CultureInfo.InvariantCulture, m => m("({0},{1}): {2}", lm.Location.Line, lm.Location.Column, lm.Message));
exl.Add(
new ArgumentException(
string.Format(
parser.Context.Culture,
SR.CqlSyntaxErrorException,
constraint,
lm.Location.Line,
lm.Location.Column,
lm.Level,
lm.Message
),
"constraint"
)
);
break;
case ErrorLevel.Info:
logger.Info(CultureInfo.InvariantCulture, m => m("({0},{1}): {2}", lm.Location.Line, lm.Location.Column, lm.Message));
break;
default:
logger.Warn(CultureInfo.InvariantCulture, m => m("({0},{1}): {2}", lm.Location.Line, lm.Location.Column, lm.Message));
break;
}
}
if (exl.Count > 0)
{
throw new AggregateException(exl);
}
}
var parameters = new ParameterExpression[] {
Expression.Parameter(source.ElementType)
};
var ebp = new ExpressionBuilderParameters(parameters, source.Provider, source.ElementType, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider);
LambdaExpression lambda = Expression.Lambda(((Ast.IExpressionBuilder)tree.Root.AstNode).CreateExpression(ebp, typeof(bool), null), parameters);
return(source.Provider.CreateQuery(
Expression.Call(
typeof(Queryable),
"Where",
new Type[] { source.ElementType },
source.Expression,
Expression.Quote(lambda)
)
));
}
public static IQueryable <T> Where <T>(this IQueryable <T> source, string constraint, XmlNamespaceManager namespaceManager = null, bool mayRootPathBeImplied = false, IOperatorImplementationProvider operatorImplementationProvider = null)
{
return((IQueryable <T>)Where((IQueryable)source, constraint, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider));
}
//TODO: compile LINQ expression?
internal IQueryable Where(IQueryable source, IEnumerable <Uri> ids, XmlNamespaceManager namespaceManager = null, IOperatorImplementationProvider operatorImplementationProvider = null)
{
var parameters = new ParameterExpression[] {
Expression.Parameter(source.ElementType)
};
var xpqn = new XPathQueryableNavigator(source.ElementType, namespaceManager);
XPathNodeIterator xpni = xpqn.Select(CoreQueryable.Identifier.Name, namespaceManager);
if (xpni.MoveNext())
{
var idn = (XPathQueryableNavigator)xpni.Current;
Type idType = idn.Type;
TypeConverter converter = GetIdentifierUriConverter(idType);
// Convert ids from Uris to identifier type
// urip => (idType)converter.ConvertTo(urip, idType)
var urip = Expression.Parameter(typeof(Uri));
var conex = Expression.Lambda(
typeof(Func <,>).MakeGenericType(typeof(Uri), idType),
Expression.Convert(
Expression.Call(
Expression.Constant(converter),
"ConvertTo",
null,
urip,
Expression.Constant(idType)
),
idType
),
urip
);
// var convertedIds=ids.Select<Uri, idType>(uri => (idType)converter.ConvertTo(uri, idType))
var urilistp = Expression.Parameter(typeof(IEnumerable <Uri>));
var convertids = Expression.Lambda(
Expression.Call(
typeof(Enumerable),
"Select",
new Type[] { typeof(Uri), idType },
Expression.Constant(ids),
conex
),
urilistp
).Compile();
var convertedIds = convertids.DynamicInvoke(ids);
// Creates the Where clause
LambdaExpression lambda = Expression.Lambda(
Expression.Call(
typeof(Enumerable),
"Contains",
new Type[] { idType },
Expression.Constant(convertedIds),
idn.CreateExpression(parameters[0])
),
parameters
);
return(source.Provider.CreateQuery(
Expression.Call(
typeof(Queryable),
"Where",
new Type[] { source.ElementType },
source.Expression,
Expression.Quote(lambda)
)
));
}
throw new InvalidOperationException();
}
public static IQueryable Where(this IQueryable source, Filter filter, XmlNamespaceManager namespaceManager = null, bool mayRootPathBeImplied = false, IOperatorImplementationProvider operatorImplementationProvider = null, Func <Type, IXmlNamespaceResolver, XPathTypeNavigator> navigatorCreator = null)
{
Debug.Assert(source != null);
if (source == null)
{
throw new ArgumentNullException("source");
}
Debug.Assert(filter != null);
if (filter == null)
{
throw new ArgumentNullException("filter");
}
LambdaExpression lambda = filter.CreateLambda(source, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider, navigatorCreator);
return(source.Provider.CreateQuery(
Expression.Call(
typeof(Queryable),
"Where",
new Type[] { source.ElementType },
source.Expression,
Expression.Quote(lambda)
)
));
}
public static IQueryable <T> Where <T>(this IQueryable <T> source, Filter filter, XmlNamespaceManager namespaceManager = null, bool mayRootPathBeImplied = false, IOperatorImplementationProvider operatorImplementationProvider = null, Func <Type, IXmlNamespaceResolver, XPathTypeNavigator> navigatorCreator = null)
{
return((IQueryable <T>)Where((IQueryable)source, filter, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider));
}
internal static IQueryable Where(this IQueryable source, Types.Constraint constraint, XmlNamespaceManager namespaceManager = null, bool mayRootPathBeImplied = false, IOperatorImplementationProvider operatorImplementationProvider = null)
{
Debug.Assert(source != null);
if (source == null)
{
throw new ArgumentNullException("source");
}
Debug.Assert(constraint != null);
if (constraint == null)
{
throw new ArgumentNullException("constraint");
}
IQueryable ret = source;
//if (constraint.Filter!=null)
if (constraint.Untyped.Descendants("{http://www.opengis.net/ogc}Filter").Any <XElement>())
{
ret = Filter110.FilterQueryable.Where(ret, constraint.Filter, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider, (t, r) => new XPathQueryableNavigator(t, r));
}
if (!string.IsNullOrWhiteSpace(constraint.CqlText))
{
ret = Cql.CqlQueryable.Where(ret, constraint.CqlText, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider);
}
return(ret);
}
internal LambdaExpression CreateLambda(IQueryable source, XmlNamespaceManager namespaceManager, bool mayRootPathBeImplied, IOperatorImplementationProvider operatorImplementationProvider, Func <Type, IXmlNamespaceResolver, XPathTypeNavigator> navigatorCreator = null)
{
Expression body = null;
ParameterExpression[] parameters = new ParameterExpression[] {
Expression.Parameter(source.ElementType)
};
if (Untyped.Elements().Any())
{
var ebp = new ExpressionBuilderParameters(parameters, source.Provider, source.ElementType, namespaceManager, mayRootPathBeImplied, operatorImplementationProvider, navigatorCreator);
Type st = typeof(bool);
if (logicOps != null)
{
body = logicOps.CreateExpression(ebp, st, null);
}
else if (comparisonOps != null)
{
body = comparisonOps.CreateExpression(ebp, st, null);
}
else if (spatialOps != null)
{
body = spatialOps.CreateExpression(ebp, st, null);
}
}
else if (string.IsNullOrWhiteSpace(Untyped.Value))
{
body = Expression.Constant(true, typeof(bool));
}
if (body == null)
{
throw new ArgumentException(
string.Format(
CultureInfo.InvariantCulture,
SR.InvalidFilterDefinitionException,
Untyped.Value
)
);
}
return(Expression.Lambda(body, parameters));
}