public static FieldQueryExpressionCollections GetFieldExpressions(QueryExpression queryExpression)
{
FieldQueryExpressionCollections fes = new FieldQueryExpressionCollections();
if (null == queryExpression)
{
throw new ArgumentNullException("QueryExpression can't be null!");
}
else
{
if (typeof(FieldQueryExpression) == queryExpression.GetType())
{
//throw new Exception("The type of QueryExpression can't be FieldQueryExpression !");
GetFieldExpressionFromTree(queryExpression, fes);
}
else
{
GetFieldExpressionFromTree(queryExpression, fes);
}
}
return(fes);
}
public IEnumerable <DomainModel <T> > GetDomainModels <T>(QueryExpression queryExpression, ViewModel <T> viewModel, DomainModel <T> domainModel, Func <Func <DomainModel <T>, DomainModel <T>, bool>, DomainModel <T>, IEnumerable <DomainModel <T> > > domainModelsFunc)
{
if (null == queryExpression || domainModelsFunc == null || viewModel == null || domainModelsFunc == null)
{
throw new ArgumentNullException("The parameter can't be null!");
}
//Firstly,we should convert the viewmodel to domainmodel
DomainModel <T> convertedDomainModel = MappingModel <T> .ConvertViewModelToDataModel(viewModel, domainModel);
if (null == domainModel)
{
throw new Exception("DomainModel can't be null!");
}
return(domainModelsFunc(
//m:要匹配的领域模型，也就是从Reposity层中获取的数据模型，经转换后的领域模型
//n:被匹配的领域模型，也就是从View层中获取的视图模型，经转换后的领域模型
(m, n) => {
bool flag = false;
//Clone QueryExpression
QueryExpression cloneQueryExpression = cloneQueryExpression = queryExpression.Clone() as QueryExpression; //LogicalCalculationExpressionFactory.CreateEmptyLogicalCalculationQueryExpression();
//Get the FieldQueryExpresstion
//We should set another FieldQueryExpressionCollections named fieldQueryExpressionCollections_lambda because of modifying the keys
FieldQueryExpressionCollections fieldQueryExpressionCollections = QueryExpressionComplier.GetFieldExpressions(cloneQueryExpression);
//Error 0
FieldQueryExpressionCollections fieldQueryExpressionCollections_lambda = QueryExpressionComplier.GetFieldExpressions(cloneQueryExpression);
if (null != fieldQueryExpressionCollections && fieldQueryExpressionCollections.Count() > 0)
{
string pname = string.Empty;
FieldQueryExpression fieldQueryExpression = null;
PropertyInfo p, comparedp;
Type fieldQueryExpressionTType;
Object reflectedFieldQueryExpresstionT;
#region Foreach FieldQueryExpressionCollections
foreach (KeyValuePair <FieldQueryExpression, bool?> kv in fieldQueryExpressionCollections)
{
//Step1:Reflect Model's property
fieldQueryExpression = kv.Key;
pname = fieldQueryExpression.FieldName;
p = m.GetPropertyByName(pname);
comparedp = n.GetPropertyByName(pname);
fieldQueryExpressionTType = typeof(FieldQueryExpressionT <>);
fieldQueryExpressionTType = fieldQueryExpressionTType.MakeGenericType(comparedp.PropertyType);
//Error1
reflectedFieldQueryExpresstionT = Activator.CreateInstance(fieldQueryExpressionTType);
reflectedFieldQueryExpresstionT = fieldQueryExpression;
//Step2:Use Metadata and Func to Comapre model
if (n.IsOrNotPredict(comparedp))
{
//fieldQueryExpressionCollections.SetFieldQueryExpressionResultTrue(fieldQueryExpression);
fieldQueryExpressionCollections_lambda.SetFieldQueryExpressionResultTrue(fieldQueryExpression);
}
else
{
MethodInfo predictMethod = reflectedFieldQueryExpresstionT.GetType().GetMethod("CalculateResult");
object pv1 = m.GetPropertyValueByName(pname);
object pv2 = n.GetPropertyValueByName(pname);
//Error2
bool result = (bool)(predictMethod.Invoke(reflectedFieldQueryExpresstionT, new Object[] { pv1, pv2 }));
//Error3
//fieldQueryExpressionCollections.SetFieldQueryExpressionResult(fieldQueryExpression, result);
fieldQueryExpressionCollections_lambda.SetFieldQueryExpressionResult(fieldQueryExpression, result);
}
}
#endregion
#region Generate LambdaExpression Tree and calculate the result dynamicly.
Func <bool> func = QueryExpressionComplier.GetLambdaExpresstionTree(cloneQueryExpression).Compile();
flag = func();
#endregion
}
else
{
flag = false;
}
return flag;
}, convertedDomainModel
));
}
private static void GetFieldExpressionFromTree(QueryExpression queryExpression, FieldQueryExpressionCollections qfc)
{
if (null != queryExpression.LeftQueryExpression)
{
GetFieldExpressionFromTree(queryExpression.LeftQueryExpression, qfc);
GetFieldExpressionFromTree(queryExpression.RightQueryExpression, qfc);
}
else
{
if (null == queryExpression.LeftQueryExpression) // && queryExpression.GetType() == typeof(FieldQueryExpression)
{
qfc.AddFieldQueryExpressionAndResult((FieldQueryExpression)queryExpression, null);
}
}
}