/// <summary> /// Creates the member binding. /// </summary> /// <param name="propertyExpression">The property expression.</param> /// <param name="propertyTarget">The property target.</param> /// <param name="checkIfNull">if set to <c>true</c> [check if null].</param> protected void CreateMemberBinding(Expression propertyExpression, MemberInfo propertyTarget, bool checkIfNull) { // Visit the expression for its transformation. Expression result = visitorMapper.Visit(propertyExpression, checkIfNull); MemberAssignment bind = Expression.Bind(propertyTarget, result); memberForNew.Add(bind); }
public void Visit_ExpressionSubClassCheckIfNull_DefaultValueConstant_ReturnExpression() { MapperExpressionVisitor expected = new MapperExpressionVisitor(Expression.Parameter(typeof(ClassSource), "s")); Expression<Func<ClassSource, object>> exp = x => x.SubClass.PropInt1; Expression actual = null; actual = expected.Visit(exp, true); Assert.IsTrue(actual.NodeType == ExpressionType.MemberAccess); }
public void Visit_ExpressionMemberSimple_ReturnExpression() { MapperExpressionVisitor expected = new MapperExpressionVisitor(Expression.Parameter(typeof(ClassSource), "s")); Expression<Func<ClassSource, object>> exp = x => x.PropString1; Expression actual = null; actual = expected.Visit(exp.Body, true); Assert.IsNotNull(actual); }
public void Visit_ExpressionIsNull_ReturnNull() { MapperExpressionVisitor expected = new MapperExpressionVisitor(Expression.Parameter(typeof(ClassSource), "s")); Expression exp = null; Expression actual = null; actual = expected.Visit(exp); Assert.IsNull(actual); }
public void Visit_ParameterExpression_CheckIfNull_IsTrue_Expression() { MapperExpressionVisitor expected = new MapperExpressionVisitor(Expression.Parameter(typeof(ClassSource), "s")); ParameterExpression exp = Expression.Parameter(typeof(ClassSource2), "x"); Expression actual = null; actual = expected.Visit(exp,true) as ParameterExpression; Assert.IsTrue(actual.NodeType == ExpressionType.Parameter); Assert.AreNotEqual(actual.Type, exp.Type); }
internal LambdaExpression GetSortedExpression(string propertySource) { Contract.Requires(!string.IsNullOrEmpty(propertySource)); Expression result = null; var exp = PropertiesMapping.Find(x => GetPropertyInfo(x.Item2).Name == propertySource); if (exp == null) { throw new PropertyNoExistException(propertySource, TargetType); } // To change the parameter. var visitor = new MapperExpressionVisitor(paramClassSource); result = visitor.Visit(exp.Item1); return(Expression.Lambda(result, paramClassSource)); }