public void FullCheck()
{
var visitor = new WebRockExpressionConverterVisitor();
Expression <Func <User, bool> > expression = user => !user.IsActive &&
user.Credentials.Token.CurrentTokenNumber.Equals("6") &&
user.RegisterDate.ToShortDateString() == "12/10/2012";
visitor.Visit(expression);
Assert.AreEqual(5, visitor.Lefts.Count);
Assert.AreEqual(2, visitor.Rights.Count);
Assert.AreEqual(4, visitor.LastLevelNodeTypes.Count);
Assert.AreEqual(2, visitor.ConcatNodeTypes.Count);
Assert.AreEqual("user.IsActive", visitor.Lefts[0].ToString());
Assert.AreEqual("user.Credentials.Token.CurrentTokenNumber", visitor.Lefts[1].ToString());
Assert.AreEqual("user.Credentials.Token", visitor.Lefts[2].ToString());
Assert.AreEqual("user.Credentials", visitor.Lefts[3].ToString());
Assert.AreEqual("user.RegisterDate", visitor.Lefts[4].ToString());
Assert.AreEqual("\"6\"", visitor.Rights[0].ToString());
Assert.AreEqual("\"12/10/2012\"", visitor.Rights[1].ToString());
Assert.AreEqual(ExpressionType.Not, visitor.LastLevelNodeTypes[0].ValueOfExpressionType);
Assert.AreEqual(ExpressionType.Call, visitor.LastLevelNodeTypes[1].ValueOfExpressionType);
Assert.AreEqual(ExpressionType.Equal, visitor.LastLevelNodeTypes[2].ValueOfExpressionType);
Assert.AreEqual(ExpressionType.Call, visitor.LastLevelNodeTypes[3].ValueOfExpressionType);
Assert.AreEqual("UnaryExpression", visitor.LastLevelNodeTypes[0].ExpressionType.Name);
Assert.AreEqual("MethodCallExpression", visitor.LastLevelNodeTypes[1].ExpressionType.Name);
Assert.AreEqual("BinaryExpression", visitor.LastLevelNodeTypes[2].ExpressionType.Name);
Assert.AreEqual("MethodCallExpression", visitor.LastLevelNodeTypes[3].ExpressionType.Name);
}
public List <ExpressionWithMethodModel> VisitForConcatedBodyType(Expression exp, List <ExpressionType> concatedList)
{
WebRockExpressionConverterVisitor converterVisitor = new WebRockExpressionConverterVisitor();
converterVisitor.Visit(exp);
concatedList.AddRange(Enumerable.Select <ExpressionWithMethodModel, ExpressionType>((IEnumerable <ExpressionWithMethodModel>)converterVisitor.ConcatNodeTypes, (Func <ExpressionWithMethodModel, ExpressionType>)(c => c.ValueOfExpressionType)));
return(converterVisitor.LastLevelNodeTypes);
}
public List <LastLevelNodeExpressionTreeModel> VisitLefts(Expression exp)
{
var converterVisitor = new WebRockExpressionConverterVisitor();
var list = new List <LastLevelNodeExpressionTreeModel>();
converterVisitor.Visit(exp);
var lefts = converterVisitor.Lefts;
var rights = converterVisitor.Rights;
rights.Reverse();
for (int index = 0; index < lefts.Count; ++index)
{
var expression1 = lefts[index];
var condition = converterVisitor.LastLevelNodeTypes.Count > index &&
converterVisitor.LastLevelNodeTypes[index].ExpressionType == typeof(UnaryExpression);
if (condition)
{
rights.Insert(index, null);
}
var expression2 = rights.Count <= index || rights.Count == 0
? null
: rights[index];
var expressionType = converterVisitor.LastLevelNodeTypes.Count <= index || converterVisitor.LastLevelNodeTypes.Count == 0
? ExpressionType.Throw
: converterVisitor.LastLevelNodeTypes[index].ValueOfExpressionType;
var methodInfo = converterVisitor.LastLevelNodeTypes.Count <= index || converterVisitor.LastLevelNodeTypes.Count == 0
? null
: converterVisitor.LastLevelNodeTypes[index].CurrentMethodInfo;
list.Add(new LastLevelNodeExpressionTreeModel()
{
LeftExpression = expression1,
RightExpression = expression2,
ExpressionWithMethodModel = new ExpressionWithMethodModel()
{
ValueOfExpressionType = expressionType,
CurrentMethodInfo = methodInfo
}
});
}
return(list);
}
public void CountOfLists()
{
var visitor = new WebRockExpressionConverterVisitor();
Expression <Func <User, bool> > expression = user => user.IsActive;
visitor.Visit(expression);
Assert.AreEqual(true, visitor.Lefts.Count == 1);
Assert.AreEqual(true, visitor.Rights.Count == 0);
Assert.AreEqual(true, visitor.LastLevelNodeTypes.Count == 0);
Assert.AreEqual(true, visitor.ConcatNodeTypes.Count == 0);
visitor = new WebRockExpressionConverterVisitor();
expression = user => user.IsActive && user.Name == "123";
visitor.Visit(expression);
Assert.AreEqual(true, visitor.Lefts.Count == 2);
Assert.AreEqual(true, visitor.Rights.Count == 1);
Assert.AreEqual(true, visitor.ConcatNodeTypes.Count == 1);
visitor = new WebRockExpressionConverterVisitor();
expression = user => user.Name.Contains("123");
visitor.Visit(expression);
Assert.AreEqual(true, visitor.Lefts.Count == 1);
Assert.AreEqual(true, visitor.Rights.Count == 1);
visitor = new WebRockExpressionConverterVisitor();
expression = user => user.Credentials.Password == "1";
visitor.Visit(expression);
Assert.AreEqual(true, visitor.Lefts.Count == 2);
Assert.AreEqual(true, visitor.Rights.Count == 1);
visitor = new WebRockExpressionConverterVisitor();
expression = user => user.Credentials.Token.CurrentTokenNumber == "1";
visitor.Visit(expression);
Assert.AreEqual(true, visitor.Lefts.Count == 3);
Assert.AreEqual(true, visitor.Rights.Count == 1);
visitor = new WebRockExpressionConverterVisitor();
expression = user => user.Activities.FirstOrDefault() != null;
visitor.Visit(expression);
Assert.AreEqual(true, visitor.Lefts.Count == 1);
Assert.AreEqual(true, visitor.Rights.Count == 1);
Assert.AreEqual(true, visitor.ConcatNodeTypes.Count == 0);
Assert.AreEqual(true, visitor.LastLevelNodeTypes.Count == 2);
}
public List <LastLevelNodeExpressionTreeModel> VisitRights(Expression exp)
{
WebRockExpressionConverterVisitor converterVisitor = new WebRockExpressionConverterVisitor();
List <LastLevelNodeExpressionTreeModel> list = new List <LastLevelNodeExpressionTreeModel>();
converterVisitor.Visit(exp);
for (int index = 0; index < converterVisitor.Rights.Count; ++index)
{
Expression expression1 = converterVisitor.Lefts.Count < index || converterVisitor.Lefts.Count == 0 ? (Expression)null : converterVisitor.Lefts[index];
Expression expression2 = converterVisitor.Rights[index];
ExpressionType expressionType = converterVisitor.LastLevelNodeTypes.Count < index || converterVisitor.LastLevelNodeTypes.Count == 0 ? ExpressionType.Throw : converterVisitor.LastLevelNodeTypes[index].ValueOfExpressionType;
MethodInfo methodInfo = converterVisitor.LastLevelNodeTypes.Count < index || converterVisitor.LastLevelNodeTypes.Count == 0 ? (MethodInfo)null : converterVisitor.LastLevelNodeTypes[index].CurrentMethodInfo;
list.Add(new LastLevelNodeExpressionTreeModel()
{
LeftExpression = expression1,
RightExpression = expression2,
ExpressionWithMethodModel = new ExpressionWithMethodModel()
{
ValueOfExpressionType = expressionType,
CurrentMethodInfo = methodInfo
}
});
}
UnaryExpression orDefault = MaybeExtension.GetOrDefault <UnaryExpression>(MaybeExtension.MaybeAs <UnaryExpression>((object)exp, true), (UnaryExpression)null);
if (orDefault != null)
{
list.Add(new LastLevelNodeExpressionTreeModel()
{
LeftExpression = orDefault.Operand,
RightExpression = (Expression)null,
ExpressionWithMethodModel = new ExpressionWithMethodModel()
{
ValueOfExpressionType = orDefault.NodeType,
CurrentMethodInfo = orDefault.Method
}
});
}
return(list);
}
private static PredicateSet GetSinglePredicateSetFromBinaryExpression(Maybe <BinaryExpression> binBody)
{
if (binBody == Maybe.Nothing)
{
return(null);
}
var body = binBody.Value;
var obj =
body.Right.MaybeAs <MethodCallExpression>()
.Bind(c => c.Arguments[0])
.GetOrDefault(null)
.MaybeAs <MemberExpression>()
.Bind(c => c.Expression)
.GetOrDefault(null)
.MaybeAs <ConstantExpression>()
.Bind(c => c.Value)
.GetOrDefault(null);
string fieldName = "value";
if (obj != null)
{
fieldName = obj.GetType().GetFields()[0].Name;
}
var value = obj.NothingIfNull().Bind(c => c.GetType().GetField(fieldName)).Bind(c => c.GetValue(obj).ToString()).GetOrDefault(null);
if (string.IsNullOrEmpty(value))
{
obj =
body.Right.MaybeAs <MemberExpression>()
.Bind(c => c.Expression)
.GetOrDefault(null)
.MaybeAs <ConstantExpression>()
.Bind(c => c.Value)
.GetOrDefault(null)
??
body.Right.MaybeAs <MemberExpression>()
.Bind(c => c.Expression)
.GetOrDefault(null)
.MaybeAs <MemberExpression>()
.Bind(c => c.Expression)
.GetOrDefault(null)
.MaybeAs <ConstantExpression>()
.Bind(c => c.Value)
.GetOrDefault(null);
if (obj != null)
{
fieldName = obj.GetType().GetFields()[0].Name;
}
if (obj != null && obj.GetType() != typeof(string) && !obj.GetType().IsPrimitive&& obj.GetType().IsClass)
{
//TODO достать значение свойства из object
}
value = obj.NothingIfNull().Bind(c => c.GetType().GetField(fieldName)).Bind(c => c.GetValue(obj).ToString()).GetOrDefault(null);
}
var listOfValues = new List <string>
{
body.Right.MaybeAs <ConstantExpression>().Bind(c => c.Value.ToString()).GetOrDefault(null),
value
};
var property = body.Left.MaybeAs <MethodCallExpression>().Bind(c => c.Object).GetOrDefault(null).MaybeAs <MemberExpression>().Bind(c => c.Member.Name).GetOrDefault(null);
var listOfProperty = new List <string>()
{
body.Left.MaybeAs <MemberExpression>().Bind(c => c.Member.Name).GetOrDefault(null),
property
};
if (property == null)
{
var vt = new WebRockExpressionConverterVisitor();
vt.Visit(body.Left);
foreach (var expression in vt.Lefts)
{
expression.MaybeAs <MemberExpression>().Do((c) => listOfProperty.Add(c.Member.Name));
}
}
var rightProperty = body.Right.MaybeAs <MethodCallExpression>().Bind(c => c.Object).GetOrDefault(null).MaybeAs <MemberExpression>().Bind(c => c.Member.Name).GetOrDefault(null);
return(new PredicateSet
{
Method = body.Method == null?body.Left.MaybeAs <MethodCallExpression>().Bind(c => c.Method.Name).GetOrDefault(null) ?? "Contains" : body.Method.Name,
Property = string.Join("&&", listOfProperty.Where(c => c != null).Distinct()) + "&&" + rightProperty,
Value = listOfValues.FirstOrDefault(c => c != null)
});
}
