Additional handling for "special" facet IDs (SITE, TAG etc). Part of ACE-2639.

This check-in ensures that those facet IDs are not prefixed with the '@' char like all other facet IDs.
The list is currently injected from solr-facets-context.xml, which required a slight refactoring of spring beans to make SolrFacetHelper a bean.


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@85711 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/search/impl/solr/facet/SolrFacetHelper.java

@@ -105,7 +105,17 @@ public class SolrFacetHelper
         BUCKETED_FIELD_FACETS.add(MODIFIED_FIELD_FACET_QUERY);
         BUCKETED_FIELD_FACETS.add(CONTENT_SIZE_FIELD_FACET_QUERY);
     }
-
+    
+    /** These facet IDs are recognised by SOLR and can be used directly within facetted searches. */
+    private Set<String> specialFacetIds = Collections.emptySet();
+    {
+    }
+    
+    public void setSpecialFacetIds(Set<String> ids)
+    {
+        this.specialFacetIds = ids;
+    }
+    
     /** Facet value and facet query display label handlers */
     private Map<String, FacetLabelDisplayHandler> displayHandlers;
 
@@ -288,6 +298,15 @@ public class SolrFacetHelper
     {
         return Collections.unmodifiableSet(BUCKETED_FIELD_FACETS);
     }
+    
+    /**
+     * Is the specified facet ID part of the list of "specials" which are
+     * handled by our SOLR service as is?
+     */
+    public boolean isSpecialFacetId(String facetId)
+    {
+        return specialFacetIds.contains(facetId);
+    }
 
     /**
      * Creates Date buckets. The dates are in ISO8601 format (yyyy-MM-dd)