private Csw.V202.XPathQueryableNavigator GetNavigator(ExpressionBuilderParameters parameters)
{
if (_Navigator == null)
{
Csw.V202.XPathQueryableNavigator xptn = new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni = xptn.Select(_Identifier.Symbol, parameters.NamespaceResolver, true);
while (xpni.MoveNext())
{
_Navigator = xpni.Current as Csw.V202.XPathQueryableNavigator;
}
Debug.Assert(_Navigator != null);
if (_Navigator == null)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
SR.InvalidPropertyNameExpressionException,
_Identifier.Symbol
)
);
}
}
return(_Navigator);
}
private XPathTypeNavigator GetNavigator(ExpressionBuilderParameters parameters)
{
if (_Navigator == null)
{
XPathTypeNavigator xptn = parameters.CreateNavigator();
XPathNodeIterator xpni = xptn.Select(Untyped.Value, parameters.NamespaceResolver, true);
while (xpni.MoveNext())
{
_Navigator = xpni.Current as XPathTypeNavigator;
}
Debug.Assert(_Navigator != null);
if (_Navigator == null)
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
SR.InvalidPropertyNameExpressionException,
Untyped.Value
)
);
}
}
return(_Navigator);
}
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);
}
protected IEnumerable <Type> GetSubTypes(ExpressionBuilderParameters parameters)
{
using (IEnumerator <IExpressionBuilder> children = GetEnumerator())
while (children.MoveNext())
{
yield return(children.Current.GetExpressionStaticType(parameters));
}
}
private Expression CreateStandardExpression(Expression subexpr, ExpressionBuilderParameters parameters, Type subType)
{
return(Expression.MakeUnary(
_FilterElement.OperatorExpressionType,
subexpr,
null
));
}
internal protected override Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
if (Value != null)
{
return(Value.GetType());
}
return(typeof(object));
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func<Expression, ParameterExpression, Expression> operatorCreator)
{
// We only want literals in this case
if (operatorCreator==null)
return null;
return GetNavigator(parameters)
.CreateExpression(parameters.Parameters[0], expectedStaticType, operatorCreator);
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func <Expression, ParameterExpression, Expression> operatorCreator)
{
if (_OptionalNot != null)
{
return(GetExpressionCreator().CreateExpression(parameters));
}
else
{
return(((IExpressionBuilder)_Primary).CreateExpression(parameters, expectedStaticType, null));
}
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func <Expression, ParameterExpression, Expression> operatorCreator)
{
Expression ret = Expression.Constant(GetValue(_Node, parameters), GetExpressionStaticType(parameters));
if (operatorCreator != null)
{
ret = operatorCreator(ret, null);
}
return(ret);
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func <Expression, ParameterExpression, Expression> operatorCreator)
{
// We only want literals in this case
if (operatorCreator == null)
{
return(null);
}
return(GetNavigator(parameters)
.CreateExpression(parameters.Parameters[0], expectedStaticType, operatorCreator));
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func<Expression, ParameterExpression, Expression> operatorCreator)
{
if (!_Result.HasValue)
{
Csw.V202.XPathQueryableNavigator xptn=new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni=xptn.Select(_AttributeName.Identifier.Symbol, parameters.NamespaceResolver, true);
_Result=xpni.MoveNext();
if (_Negated)
_Result=!_Result;
}
return Expression.Constant(_Result.Value, typeof(bool));
}
public Expression CreateExpression(ExpressionBuilderParameters parameters)
{
using (IEnumerator <IExpressionBuilder> children = GetEnumerator())
if (children.MoveNext() && (children.Current != null))
{
return(CreateStandardExpression(
children.Current.CreateExpression(parameters, children.Current.GetExpressionStaticType(parameters), null),
parameters,
_FilterElement.GetExpressionStaticType(parameters)
));
}
return(null);
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func <Expression, ParameterExpression, Expression> operatorCreator)
{
if (!_Result.HasValue)
{
Csw.V202.XPathQueryableNavigator xptn = new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni = xptn.Select(_AttributeName.Identifier.Symbol, parameters.NamespaceResolver, true);
_Result = xpni.MoveNext();
if (_Negated)
{
_Result = !_Result;
}
}
return(Expression.Constant(_Result.Value, typeof(bool)));
}
protected IEnumerable <object> GetConstants(ExpressionBuilderParameters parameters)
{
using (IEnumerator <IExpressionBuilder> children = GetEnumerator())
while (children.MoveNext())
{
object ret = null;
Expression exp = children.Current.CreateExpression(parameters, null, null);
if ((exp != null) && (exp.NodeType == LinqExpressionType.Constant))
{
ret = ((ConstantExpression)exp).Value;
}
yield return(ret);
}
}
public Expression CreateExpression(ExpressionBuilderParameters parameters)
{
Expression ret=null;
foreach (IExpressionCreator c in _Creators)
if (ret!=null)
ret=Expression.MakeBinary(
_Combinator,
ret,
c.CreateExpression(parameters)
);
else
ret=c.CreateExpression(parameters);
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));
}
public Expression CreateExpression(ExpressionBuilderParameters parameters)
{
Expression ret = null;
foreach (IExpressionCreator c in _Creators)
{
if (ret != null)
{
ret = Expression.MakeBinary(
_Combinator,
ret,
c.CreateExpression(parameters)
);
}
else
{
ret = c.CreateExpression(parameters);
}
}
return(ret);
}
private XPathTypeNavigator GetNavigator(ExpressionBuilderParameters parameters)
{
if (_Navigator==null)
{
XPathTypeNavigator xptn=parameters.CreateNavigator();
XPathNodeIterator xpni=xptn.Select(Untyped.Value, parameters.NamespaceResolver, true);
while (xpni.MoveNext())
_Navigator=xpni.Current as XPathTypeNavigator;
Debug.Assert(_Navigator!=null);
if (_Navigator==null)
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
SR.InvalidPropertyNameExpressionException,
Untyped.Value
)
);
}
return _Navigator;
}
private Csw.V202.XPathQueryableNavigator GetNavigator(ExpressionBuilderParameters parameters)
{
if (_Navigator==null)
{
Csw.V202.XPathQueryableNavigator xptn=new Csw.V202.XPathQueryableNavigator(parameters.ElementType);
XPathNodeIterator xpni=xptn.Select(_Identifier.Symbol, parameters.NamespaceResolver, true);
while (xpni.MoveNext())
_Navigator=xpni.Current as Csw.V202.XPathQueryableNavigator;
Debug.Assert(_Navigator!=null);
if (_Navigator==null)
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
SR.InvalidPropertyNameExpressionException,
_Identifier.Symbol
)
);
}
return _Navigator;
}
internal protected virtual Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
var bop = this as IBinaryOperator;
if (bop != null)
{
Type[] subtypes = bop.expression
.Select <expression, Type>(e => ((IExpressionBuilder)e).GetExpressionStaticType(parameters))
.Where <Type>(t => t != null)
.ToArray <Type>();
if (subtypes.Length == 0)
{
return(null);
}
//TODO: probably needs more checking on other subtypes there...
return(subtypes[0]);
}
return(null);
}
private Expression CustomCallback(IEnumerator <IExpressionBuilder> children, LinkedList <Expression> subexpr, IEnumerator types, IEnumerator vals, Expression basexp, ParameterExpression pexp, MethodInfo method, object instance, ExpressionBuilderParameters parameters)
{
Expression ret = basexp;
if (pexp != null)
{
Expression sub = null;
bool hasNext = vals.MoveNext() && types.MoveNext();
if (hasNext)
{
children.MoveNext();
if (vals.Current == null)
{
sub = children.Current.CreateExpression(parameters, (Type)types.Current, (e, p) => CustomCallback(children, subexpr, types, vals, e, p, method, instance, parameters));
}
else
{
sub = CustomCallback(children, subexpr, types, vals, Expression.Constant(vals.Current, (Type)types.Current), null, method, instance, parameters);
}
}
else
{
sub = subexpr.Last.Value;
subexpr.RemoveLast();
}
ret = CreateCustomExpression(method, instance, new Expression[] { ret, sub }, parameters, (Type)types.Current);
if (!hasNext)
{
subexpr.AddLast(ret);
}
}
return(ret);
}
internal protected override Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return GetNavigator(parameters).Type;
}
internal protected override Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
// Cannot decide at this time
return null;
}
public Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return GetNavigator(parameters).Type;
}
public Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func <Expression, ParameterExpression, Expression> operatorCreator)
{
return(GetExpressionCreator().CreateExpression(parameters));
}
protected override Expression CreateStandardExpression(IEnumerable <Expression> subexpr, ExpressionBuilderParameters parameters, Type subType)
{
throw new NotSupportedException("Only custom implementations are supported");
}
internal protected override Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
// Cannot decide at this time
return(null);
}
internal protected override Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func<Expression, ParameterExpression, Expression> operatorCreator)
{
Expression ret=null;
if (expectedStaticType!=null)
{
object value=Untyped.Value;
// Convert the string to the expectedStaticType
switch (Type.GetTypeCode(expectedStaticType))
{
case TypeCode.Boolean:
value=XmlConvert.ToBoolean(Untyped.Value);
break;
case TypeCode.Byte:
value=XmlConvert.ToByte(Untyped.Value);
break;
case TypeCode.Char:
value=XmlConvert.ToChar(Untyped.Value);
break;
case TypeCode.DateTime:
value=XmlConvert.ToDateTime(Untyped.Value, XmlDateTimeSerializationMode.RoundtripKind);
break;
case TypeCode.Decimal:
value=XmlConvert.ToDecimal(Untyped.Value);
break;
case TypeCode.Double:
value=XmlConvert.ToDouble(Untyped.Value);
break;
case TypeCode.Int16:
value=XmlConvert.ToInt16(Untyped.Value);
break;
case TypeCode.Int32:
value=XmlConvert.ToInt32(Untyped.Value);
break;
case TypeCode.Int64:
value=XmlConvert.ToInt64(Untyped.Value);
break;
case TypeCode.SByte:
value=XmlConvert.ToSByte(Untyped.Value);
break;
case TypeCode.Single:
value=XmlConvert.ToSingle(Untyped.Value);
break;
case TypeCode.String:
// We are already there
break;
case TypeCode.UInt16:
value=XmlConvert.ToUInt16(Untyped.Value);
break;
case TypeCode.UInt32:
value=XmlConvert.ToUInt32(Untyped.Value);
break;
case TypeCode.UInt64:
value=XmlConvert.ToUInt64(Untyped.Value);
break;
default:
if (expectedStaticType==typeof(DateTimeOffset))
{
value=XmlConvert.ToDateTimeOffset(Untyped.Value);
} else
// Last resort conversion
value=Convert.ChangeType(Untyped.Value, expectedStaticType, CultureInfo.InvariantCulture);
break;
}
ret=Expression.Constant(value, expectedStaticType);
}
if (ret==null)
{
Logger.Info(m => m("The literal \"{0}\" will be interpreted as a string by default", Untyped.Value));
ret=Expression.Constant(Untyped.Value);
}
if (operatorCreator!=null)
return operatorCreator(ret, null);
return ret;
}
protected abstract T GetValue(ParseTreeNode treeNode, ExpressionBuilderParameters parameters);
protected override Expression CreateCustomExpression(MethodInfo method, object instance, IEnumerable <Expression> subexpr, ExpressionBuilderParameters parameters, Type subType)
{
Expression op = base.CreateCustomExpression(method, instance, subexpr, parameters, subType);
Type rt = Nullable.GetUnderlyingType(method.ReturnType) ?? method.ReturnType;
return(Expression.MakeBinary(
Node._OperatorExpression,
op,
Expression.Constant(Convert.ChangeType(Node._Tolerance.Value, rt, CultureInfo.InvariantCulture), method.ReturnType)
));
}
internal protected override Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return(base.GetExpressionStaticType(parameters) ?? typeof(decimal));
}
Type IExpressionBuilder.GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return typeof(bool);
}
private Expression StandardCallback(IEnumerator <IExpressionBuilder> children, LinkedList <Expression> subexpr, Expression basexp, ParameterExpression pexp, ExpressionBuilderParameters parameters, Type expectedStaticType)
{
Expression ret = basexp;
if (pexp != null)
{
Expression sub = null;
bool hasNext = children.MoveNext();
if (hasNext)
{
sub = children.Current.CreateExpression(parameters, expectedStaticType, (e, p) => StandardCallback(children, subexpr, e, p, parameters, expectedStaticType));
}
else
{
sub = subexpr.Last.Value;
subexpr.RemoveLast();
}
ret = CreateStandardExpression(new Expression[] { ret, sub }, parameters, expectedStaticType);
if (!hasNext)
{
subexpr.AddLast(ret);
}
}
return(ret);
}
internal protected virtual Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return(typeof(T));
}
public virtual Expression CreateExpression(ExpressionBuilderParameters parameters)
{
Expression ret = null;
List <Type> subTypes = GetSubTypes(parameters).ToList <Type>();
Type subtype = subTypes.FirstOrDefault <Type>(t => t != null);
subTypes = subTypes.Select <Type, Type>(t => t == null ? subtype : t).ToList <Type>();
// Custom implementation
if (parameters.OperatorImplementationProvider != null)
{
List <object> paramValues = GetConstants(parameters).ToList <object>();
string opname = GetCustomImplementationName(subTypes, paramValues);
Type[] types = subTypes.ToArray();
object[] values = paramValues.ToArray();
object instance;
MethodInfo method = parameters.OperatorImplementationProvider.GetImplementation(opname, ref types, ref values, out instance);
if (method != null)
{
Debug.Assert(types.Length == values.Length);
using (IEnumerator <IExpressionBuilder> children = GetEnumerator())
{
IEnumerator v = values.GetEnumerator();
IEnumerator t = types.GetEnumerator();
LinkedList <Expression> subexpr = new LinkedList <Expression>();
while (v.MoveNext() && t.MoveNext())
{
children.MoveNext();
if (v.Current == null)
{
subexpr.AddLast(
children.Current.CreateExpression(parameters, (Type)t.Current, (e, p) => CustomCallback(children, subexpr, t, v, e, p, method, instance, parameters))
);
}
else
{
subexpr.AddLast(Expression.Constant(v.Current, (Type)t.Current));
}
}
if (subexpr.First != subexpr.Last)
{
ret = CreateCustomExpression(method, instance, subexpr, parameters, subtype);
}
else
{
ret = subexpr.First.Value;
}
}
}
}
// Standard implementation
if (ret == null)
{
using (IEnumerator <IExpressionBuilder> children = GetEnumerator())
{
LinkedList <Expression> subexpr = new LinkedList <Expression>();
while (children.MoveNext())
{
subexpr.AddLast(
children.Current.CreateExpression(parameters, subtype, (e, p) => StandardCallback(children, subexpr, e, p, parameters, subtype))
);
}
if (subexpr.First != subexpr.Last)
{
ret = CreateStandardExpression(subexpr, parameters, subtype);
}
else
{
ret = subexpr.First.Value;
}
}
}
return(ret);
}
Type IExpressionBuilder.GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return(GetExpressionStaticType(parameters));
}
internal protected override Expression CreateExpression(ExpressionBuilderParameters parameters, Type expectedStaticType, Func <Expression, ParameterExpression, Expression> operatorCreator)
{
Expression ret = null;
if (expectedStaticType != null)
{
object value = Untyped.Value;
// Convert the string to the expectedStaticType
switch (Type.GetTypeCode(expectedStaticType))
{
case TypeCode.Boolean:
value = XmlConvert.ToBoolean(Untyped.Value);
break;
case TypeCode.Byte:
value = XmlConvert.ToByte(Untyped.Value);
break;
case TypeCode.Char:
value = XmlConvert.ToChar(Untyped.Value);
break;
case TypeCode.DateTime:
value = XmlConvert.ToDateTime(Untyped.Value, XmlDateTimeSerializationMode.RoundtripKind);
break;
case TypeCode.Decimal:
value = XmlConvert.ToDecimal(Untyped.Value);
break;
case TypeCode.Double:
value = XmlConvert.ToDouble(Untyped.Value);
break;
case TypeCode.Int16:
value = XmlConvert.ToInt16(Untyped.Value);
break;
case TypeCode.Int32:
value = XmlConvert.ToInt32(Untyped.Value);
break;
case TypeCode.Int64:
value = XmlConvert.ToInt64(Untyped.Value);
break;
case TypeCode.SByte:
value = XmlConvert.ToSByte(Untyped.Value);
break;
case TypeCode.Single:
value = XmlConvert.ToSingle(Untyped.Value);
break;
case TypeCode.String:
// We are already there
break;
case TypeCode.UInt16:
value = XmlConvert.ToUInt16(Untyped.Value);
break;
case TypeCode.UInt32:
value = XmlConvert.ToUInt32(Untyped.Value);
break;
case TypeCode.UInt64:
value = XmlConvert.ToUInt64(Untyped.Value);
break;
default:
if (expectedStaticType == typeof(DateTimeOffset))
{
value = XmlConvert.ToDateTimeOffset(Untyped.Value);
}
else
{
// Last resort conversion
value = Convert.ChangeType(Untyped.Value, expectedStaticType, CultureInfo.InvariantCulture);
}
break;
}
ret = Expression.Constant(value, expectedStaticType);
}
if (ret == null)
{
Logger.Info(m => m("The literal \"{0}\" will be interpreted as a string by default", Untyped.Value));
ret = Expression.Constant(Untyped.Value);
}
if (operatorCreator != null)
{
return(operatorCreator(ret, null));
}
return(ret);
}
protected abstract Expression CreateStandardExpression(IEnumerable <Expression> subexpr, ExpressionBuilderParameters parameters, Type subType);
protected override Expression CreateCustomExpression(MethodInfo method, object instance, IEnumerable <Expression> subexpr, ExpressionBuilderParameters parameters, Type subType)
{
Expression op = base.CreateCustomExpression(method, instance, subexpr, parameters, subType);
Type rt = Nullable.GetUnderlyingType(method.ReturnType) ?? method.ReturnType;
if (method.ReturnType == typeof(bool))
{
return(op);
}
else
{
return(Expression.Equal(
op,
Expression.Constant(Convert.ChangeType(true, rt, CultureInfo.InvariantCulture), method.ReturnType)
));
}
}
protected virtual Expression CreateCustomExpression(MethodInfo method, object instance, IEnumerable <Expression> subexpr, ExpressionBuilderParameters parameters, Type subType)
{
Expression op = null;
if (instance != null)
{
op = Expression.Call(
Expression.Constant(instance),
method,
subexpr
);
}
else
{
op = Expression.Call(
method,
subexpr
);
}
return(op);
}
Type IExpressionBuilder.GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return(typeof(bool));
}
internal protected override Type GetExpressionStaticType(ExpressionBuilderParameters parameters)
{
return base.GetExpressionStaticType(parameters) ?? typeof(decimal);
}
