Be more lenient of what an empty queryEntityType is (null or "" both being OK)...

Be more lenient of what an empty queryEntityType is (null or "" both being OK) as the system may create "" when no entity_type was defined when the query is defined.

SVN: 28319

openbis/source/java/ch/systemsx/cisd/openbis/plugin/query/server/QueryServer.java

@@ -25,6 +25,7 @@ import java.util.Map;
 import javax.annotation.Resource;
 
 import org.apache.commons.lang.StringEscapeUtils;
+import org.apache.commons.lang.StringUtils;
 import org.springframework.dao.DataAccessException;
 import org.springframework.stereotype.Component;
 
@@ -144,7 +145,7 @@ public class QueryServer extends AbstractServer<IQueryServer> implements IQueryS
                 {
                     final String queryEntityTypeCodePatternOrNull =
                             query.getEntityTypeCodePattern();
-                    if (queryEntityTypeCodePatternOrNull == null
+                    if (StringUtils.isEmpty(queryEntityTypeCodePatternOrNull)
                             || entityTypeCode.matches(queryEntityTypeCodePatternOrNull))
                     {
                         filtered.add(query);