[Geotools-devel] [JIRA] (GEOT-5728) [WFS] Support sending "viewparams" parameter for non-stored queries

Damiano Albani (JIRA) Mon, 15 May 2017 07:28:01 -0700

Title: Message Title

Damiano Albani created an issue

Issue Type:	Improvement
Assignee:	Unassigned
Components:	wfs-ng
Created:	15/May/17 4:27 PM
Priority:	Medium
Reporter:	Damiano Albani

The WFS-NG client currently supports the VIRTUAL_TABLE_PARAMETERS hint in combination with a stored query — and only with StrictWFS_2_0_Strategy AFAIK.

It would be nice if this hint was honored for "standard" queries as well, giving the ability to add a "&viewparams=..." query parameter for example.

My understanding is that it could implemented in StrictWFS_2_0_Strategy#buildGetFeatureParametersForGET() roughly like:

 
                                                                        ...
        // Very crude
        if (query.getMaxFeatures() != null) {
            String count = kvp.remove("MAXFEATURES");
            kvp.put("COUNT", count);
        }
        Map<String, String> viewParams = null;
        if (query.getHints() != null) {
            viewParams = (Map<String, String>)query.getHints()
                    .get(Hints.VIRTUAL_TABLE_PARAMETERS);
            Map<String, String> finalKvp = kvp;
            viewParams.entrySet().stream().forEach(entry -> finalKvp.put(entry.getKey(), entry.getValue()));
        }
        ...
 
                                                            

And then used as:

 
                                                                        Query query = new Query(...);
        Map<String, String> vparams = new HashMap<String, String>();
        vparams.put("viewparams", "param1:abc;param2:def");
        Hints hints = new Hints(Hints.VIRTUAL_TABLE_PARAMETERS, vparams);
        query.setHints(hints);
 
                                                            

For the record, this feature (request) was discussed years ago in http://osgeo-org.1560.x6.nabble.com/WFSDatastore-amp-Geoserver-SQL-layer-td4515278.html.

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[Geotools-devel] [JIRA] (GEOT-5728) [WFS] Support sending "viewparams" parameter for non-stored queries

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