private static QueryCondition BuildQueryCondition <T>(string postFilter)
{
var postFilterParts = postFilter.Split(new[]
{
"=",
"==",
"!=",
"<>",
">",
"<",
">=",
"<="
}, 2, StringSplitOptions.RemoveEmptyEntries);
if (postFilterParts.Length != 2)
{
return(null);
}
var propertyName = postFilterParts[0];
var constraintValue = postFilterParts[1];
var stringOperator = postFilter.Substring(propertyName.Length,
postFilter.Length - propertyName.Length - constraintValue.Length);
Operator binaryOperator;
try
{
binaryOperator = OperatorFactory.FromString(stringOperator);
}
catch (ArgumentException)
{
// unsupported operators are ignored
return(null);
}
var type = typeof(T);
var property = type.GetProperty(propertyName, BindingFlags.Public | BindingFlags.Instance);
if (property == null)
{
return(null);
}
var queryCondition = new QueryCondition()
{
Term = new OperatorTerm()
{
Operator = binaryOperator
},
ConstraintValue = constraintValue,
Property = new PropertyModel()
{
Alias = propertyName,
Name = propertyName,
Type = property.PropertyType.Name
}
};
return(queryCondition);
}