private void PredicateBuilderByExpressions(
IDictionary <PropertyInfo, SearchPredicatePropertyInfo> propertyInfoByPropName)
{
foreach (var(prop, searchPredicatePropertyInfo) in propertyInfoByPropName)
{
PropertyOrField = searchPredicatePropertyInfo.PropertyOrField;
EntityName = searchPredicatePropertyInfo.EntityName;
FilterPropertyValue = searchPredicatePropertyInfo.PropertyValue;
FilterPropertyType = prop.PropertyType;
EntityPropertyType = searchPredicatePropertyInfo.InstanceTypeOfProperty
.GetProperty(EntityName.ToUpper())?.PropertyType;
var predicateBitwiseOperation = searchPredicatePropertyInfo.PredicateBitwiseOperation;
if (FilterPropertyValue is string _)
{
var expression = StringContainsExpr();
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (FilterPropertyValue is StringFilter stringFilter)
{
var expression = StringFilterContainsExpr(stringFilter);
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (FilterPropertyValue is DateTimeFromToFilter dateTimeFromToFilter)
{
var expression = DateTimeExpr(dateTimeFromToFilter, Item);
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (FilterPropertyValue.GetType().IsGenericType&&
FilterPropertyValue.GetType().GetGenericTypeDefinition() == typeof(NumericFilter <>))
{
var expression = NumericFilterExpr(Item);
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (!searchPredicatePropertyInfo.IsEntityTypeProperty)
{
var expression = CollectionContainsExpr();
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else
{
var expression = DefaultExpr();
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
}
}
private Expression <Func <TEntity, bool> > StringContainsExpr()
{
var equalsMethodInfo =
typeof(string).GetMethod(StringSearchOption.Equals.ToString(),
new[] { typeof(string) });
var valueToEquals = Expression.Constant(FilterPropertyValue.ToString().ToLower());
var call = Expression.Call(PropertyOrField, "ToLower", null);
var methodCallExpression = Expression.Call(call, equalsMethodInfo, valueToEquals);
var lambda = methodCallExpression.LambdaExpressionBuilder <TEntity>(Item);
return(lambda);
}
private Expression <Func <TEntity, bool> > NumericFilterExpr(ParameterExpression item)
{
#region NumericFilter
var numericFilter = FilterPropertyValue.GetType().GetProperties();
var value1 = numericFilter[0].GetValue(FilterPropertyValue);
var value2 = numericFilter[1].GetValue(FilterPropertyValue);
// var bitOperation = (BitwiseOperation) numericFilter[2].GetValue(FilterPropertyValue);
#endregion
#region NumericValue
var numericValues1 = value1.GetType().GetProperties();
var numericValue1 = numericValues1[0].GetValue(value1);
var exprTypeValue1 = (CompareExpressionType)numericValues1[1].GetValue(value1);
#endregion
var value1ExprConst = Expression.Constant(numericValue1);
var expr1 = Expression.MakeBinary(exprTypeValue1.ConvertByName <ExpressionType>(),
PropertyOrField,
value1ExprConst);
BinaryExpression expr2 = null;
if (value2 != null)
{
#region NumericValue
var numericValues2 = value2.GetType().GetProperties();
var numericValue2 = numericValues2[0].GetValue(value2);
var exprTypeValue2 =
(CompareExpressionType)numericValues2[1].GetValue(value2);
#endregion
var value2ExprConst = Expression.Constant(numericValue2);
expr2 = Expression.MakeBinary(exprTypeValue2.ConvertByName <ExpressionType>(),
PropertyOrField,
value2ExprConst);
}
var lambda = expr1.LambdaExpressionBuilder <TEntity>(item, expr2, BitwiseOperationExpressions.Or);
return(lambda);
}
private Expression <Func <TEntity, bool> > DefaultExpr()
{
var right = Expression.Constant(FilterPropertyValue);
BinaryExpression binaryExpression;
if (EntityPropertyType.IsNullable())
{
var leftUnaryExpression = Expression.Convert(PropertyOrField, FilterPropertyValue.GetType());
binaryExpression = Expression.Equal(leftUnaryExpression, right);
}
else
{
binaryExpression = Expression.Equal(PropertyOrField, right);
}
var lambda = binaryExpression.LambdaExpressionBuilder <TEntity>(Item);
return(lambda);
}
private void PredicateBuilderByExpressions(
IDictionary <PropertyInfo, SearchPredicatePropertyInfo> propertyInfoByPropName)
{
foreach (var(prop, searchPredicatePropertyInfo) in propertyInfoByPropName)
{
PropertyOrField = searchPredicatePropertyInfo.PropertyOrField;
EntityName = searchPredicatePropertyInfo.EntityName;
FilterPropertyValue = searchPredicatePropertyInfo.PropertyValue;
FilterPropertyType = prop.PropertyType;
EntityPropertyType = searchPredicatePropertyInfo.InstanceTypeOfProperty
.GetProperty(EntityName.ToUpper(),
BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance)?.PropertyType;
var predicateBitwiseOperation = searchPredicatePropertyInfo.PredicateBitwiseOperation;
if (FilterPropertyValue is string _)
{
var expression = StringContainsExpr();
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (FilterPropertyValue is StringFilter stringFilter)
{
var expression = StringFilterContainsExpr(stringFilter);
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (FilterPropertyValue is DateTimeFromToFilterComplex dateTimeFromToFilterComplex)
{
if (dateTimeFromToFilterComplex.DateFrom != null && !dateTimeFromToFilterComplex.DateFrom.DateTime.HasValue)
{
throw new ArgumentNullException(nameof(dateTimeFromToFilterComplex.DateFrom));
}
var expression = DateTimeExpr(dateTimeFromToFilterComplex, Item);
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (FilterPropertyValue is DateTimeFromToFilter dateTimeFromToFilter)
{
if (!dateTimeFromToFilter.DateFrom.HasValue)
{
throw new ArgumentNullException(nameof(dateTimeFromToFilter.DateFrom));
}
var expression = DateTimeExpr(dateTimeFromToFilter, Item);
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (FilterPropertyValue.GetType().IsGenericType&&
FilterPropertyValue.GetType().GetGenericTypeDefinition() == typeof(NumericFilter <>))
{
var expression = NumericFilterExpr();
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else if (!searchPredicatePropertyInfo.IsEntityTypeProperty)
{
var expression = CollectionContainsExpr();
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
else
{
var expression = DefaultExpr();
AutoPredicate.PredicateByOperationType(predicateBitwiseOperation, expression);
}
}
}
