Coherence3.6 Query Language in c# programs??

Question

I see Building Filters in Java Programs, import com.tangosol.util.QueryHelper
QueryHelper.createFilter("homeAddress.state = 'MA' and workAddress.state != 'MA'")
use c#,how do I ?
no Tangosol.Util.QueryHelper ?

Answer 1

This is a .NET client trying to use the CohQL - Andrew
Does the QueryHelper's method CreateExtractor have the option to return a custom extractor that I may have implemented. Reason i,s I do notice that QueryHelper returns or frames the Filter based on ReflectionExtractor and that doesn't provide means to intercept with custom extractor.
Let me tell about the - Design and Architecture of the system I had done. -Each Cache Item in the CacheCluster is of the same POF Object (say CacheContainer). This CacheContainer contains a)actual object and b) metadata Objects that are collections (Maps - key and Value) This is done so that it could contain all those properties and its values that needs to be queried against instead of a Domain objects property holding on to the values. This is where my custom Extractor come in place to retrieve values from the CacheContainer. Reason to do so we do not want the consuming teams to drop pof serilaizer for each domain object(I do know that you may be rasing an eyebrow but that is what, we want to abstract the applications team tobe abstract under the hoods).
If use the QuerHelper.CreateExtractor( query string....) how do i return a custom extractor to the invocationService.Query(filter)
E.g Where FitlerFetcher is a AbstractInvocable having one for .NET and one for Java side. Java side actually returns the extractor or filter through the override of the AbstractInvocable.Run method
FilterFetcher ff = new FilterFetcher(s, true)
IDictionary result = m_service.Query(new FilterFetcher(s, true), null);
if (result.Values == null)
return null;
IEnumerator enumerator = result.Values.GetEnumerator();
if (enumerator.MoveNext())
return (IValueExtractor) enumerator.Current;
this returned Extractor is used further in the cache.AddIndex(ff.CreateExtractor("age"), /*fOrdered*/ true, /*comparator*/ null);
and ICollection results = cache.GetEntries(ff.CreateFilter("homeAddress.state = 'MA'"));
Any thoughts and ideas are appreciated.