/// <summary>
/// Compile expression collection to query predicate.
/// </summary>
/// <param name="expressions"></param>
/// <returns></returns>
public LinqPredicate CompileQuery(QueryParameterExpressionCollection expressions)
{
if (expressions.Count == 0)
return null;
List<string> predicates = new List<string>();
ArrayList parameters = new ArrayList();
foreach (QueryParameterExpression exp in expressions)
{
QueryFieldOperators op = GetOperator(exp);
string expressionString = AssemblyExpressionString(exp.FieldName, exp.Operator, exp.Value, parameters);
predicates.Add(expressionString);
}
return new LinqPredicate(predicates.Concat(" AND "), parameters.ToArray());
}
/// <summary>
/// Build <seealso cref="QueryParameterExpressionCollection"/> from collection of queryFieldConfigurations and posted values.
/// </summary>
/// <param name="queryFieldConfigurations"></param>
/// <param name="postedValuesByControlIndex"></param>
/// <returns></returns>
public static QueryParameterExpressionCollection BuildQueryParameterExpressions(IEnumerable<QueryFieldConfiguration> queryFieldConfigurations, IEnumerable<KeyValuePair<int, string>> postedValuesByControlIndex)
{
QueryParameterExpressionCollection results = new QueryParameterExpressionCollection();
IDictionary<int, QueryFieldConfiguration> queryFieldConfigurationByControlIndex = BuildQueryFieldConfiguration(queryFieldConfigurations);
IControlValueResolverFactory controlValueResolverFactory = SpringContext.Current.GetObject<IControlValueResolverFactory>();
foreach (KeyValuePair<int, string> postedVaule in postedValuesByControlIndex)
{
if (postedVaule.Key >= queryFieldConfigurationByControlIndex.Count)
throw new ValidationException(string.Format(CultureInfo.InvariantCulture, Resources.DPCtrl_PostedValueControlIndexInvalid, postedVaule.Key));
QueryFieldConfiguration queryFieldConfiguration = queryFieldConfigurationByControlIndex[postedVaule.Key];
object fieldValue = controlValueResolverFactory.Resolve(queryFieldConfiguration, postedVaule.Value);
results.Add(new QueryParameterExpression(queryFieldConfiguration.FieldName, queryFieldConfiguration.Operator, fieldValue, queryFieldConfiguration));
}
return results;
}
