public void FindsCorrectExpressionWithInheritance()
{
var collection = new QueryFilterExpressionCollection();
collection.SetExpression <Parent>((x, y) => x != y);
var property = CreatePropertyInfo <Child>();
var result = collection.GetQueryFilterExpression(property);
AssertExpressionEqual <Child>((x, y) => x != y, result);
}
public void WorksWithMethodCalls()
{
var collection = new QueryFilterExpressionCollection();
collection.SetExpression <Child>((x, y) => x.StringEquals(y.ToString()));
var property = CreatePropertyInfo <Child>();
var result = collection.GetQueryFilterExpression(property);
AssertExpressionEqual <Child>((x, y) => x.StringEquals(y.ToString()), result);
}
public void HasDefaultExpression()
{
var collection = new QueryFilterExpressionCollection();
var childProperty = CreatePropertyInfo <Child>();
var parentProperty = CreatePropertyInfo <Parent>();
var childResult = collection.GetQueryFilterExpression(childProperty);
var parentResult = collection.GetQueryFilterExpression(parentProperty);
AssertExpressionEqual <Child>((x, y) => x == y, childResult);
AssertExpressionEqual <Parent>((x, y) => x == y, parentResult);
}
public void SetOverridesOldValue()
{
var collection = new QueryFilterExpressionCollection();
var property = CreatePropertyInfo <Child>();
collection.SetExpression <Child>((x, y) => x.GetHashCode() == y.GetHashCode());
var result = collection.GetQueryFilterExpression(property);
AssertExpressionEqual <Child>((x, y) => x.GetHashCode() == y.GetHashCode(), result);
collection.SetExpression <Child>((x, y) => x != y);
result = collection.GetQueryFilterExpression(property);
AssertExpressionEqual <Child>((x, y) => x != y, result);
}
public void FindsRealTypeFirst()
{
var collection = new QueryFilterExpressionCollection();
collection.SetExpression <Parent>((x, y) => x != y);
collection.SetExpression <Child>((x, y) => x.GetHashCode() == y.GetHashCode());
var childProperty = CreatePropertyInfo <Child>();
var parentProperty = CreatePropertyInfo <Parent>();
var childResult = collection.GetQueryFilterExpression(childProperty);
var parentResult = collection.GetQueryFilterExpression(parentProperty);
AssertExpressionEqual <Child>((x, y) => x.GetHashCode() == y.GetHashCode(), childResult);
AssertExpressionEqual <Parent>((x, y) => x != y, parentResult);
}
public static Expression SelectPropertyValue(Type type, string property, string value, QueryFilterExpressionCollection queryFilter)
{
var valueType = GetPropertyType(type, property);
var parsedValue = TryConvert(value, valueType);
var param = Expression.Parameter(type, "i");
var propertyExpression = Expression.Property(param, property);
var expression = queryFilter.GetQueryFilterExpression(type.GetProperty(property));
return(typeof(Lambda)
.GetMethod(nameof(Convert), BindingFlags.Static | BindingFlags.NonPublic)
.MakeGenericMethod(valueType, type)
.Invoke(null, new[] { expression, parsedValue, propertyExpression, param })
as Expression);
}
public static Expression SelectPropertyValue(Type type, string property, List <string> values, QueryFilterExpressionCollection queryFilter)
{
var valueType = GetPropertyType(type, property);
var parsedValuesAsObjects = values.Select(v => TryConvert(v, valueType)).ToList();
var parsedValues = (IList)Activator.CreateInstance(typeof(List <>).MakeGenericType(valueType));
foreach (var parsedValueAsObject in parsedValuesAsObjects)
{
parsedValues.Add(parsedValueAsObject);
}
var param = Expression.Parameter(type, "i");
Expression propertyExpression = param;
foreach (var member in property.Split('.'))
{
propertyExpression = Expression.PropertyOrField(propertyExpression, member);
}
var expression = queryFilter.GetQueryFilterExpression(GetPropertyInfo(type, property));
return(typeof(Lambda)
.GetMethod(nameof(Convert), BindingFlags.Static | BindingFlags.NonPublic)
.MakeGenericMethod(valueType, type)
.Invoke(null, new object[] { expression, parsedValues, propertyExpression, param })
as Expression);
}
