Support numeric grid names in vector tiles preview

Author: aaime

geowebcache/core/src/main/java/org/geowebcache/demo/Demo.java

@@ -32,6 +32,7 @@
 import java.util.stream.Collectors;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import org.apache.commons.lang3.StringUtils;
 import org.geotools.util.logging.Logging;
 import org.geowebcache.GeoWebCacheException;
 import org.geowebcache.filter.parameters.FloatParameterFilter;
@@ -342,6 +343,12 @@ private static String generateHTML(TileLayer layer, String gridSetStr, String fo
                 Arrays.stream(gridSubset.getGridNames())
                         .map(s -> String.format("\"%s\"", s))
                         .collect(Collectors.joining(", ", "[", "]")));
+        makeHiddenInput(
+                buf,
+                "gridNamesNumeric",
+                String.valueOf(
+                        Arrays.stream(gridSubset.getGridNames())
+                                .allMatch(n -> StringUtils.isNumeric(n))));
         makeHiddenInput(buf, "format", formatStr);
         makeHiddenInput(buf, "layerName", layerName);
         makeHiddenInput(buf, "SRS", gridSubset.getSRS().toString());

geowebcache/core/src/main/resources/org/geowebcache/rest/webresources/demo.js

@@ -55,6 +55,7 @@ window.onload = function() {
     }
 
     var gridsetName = getValue('gridsetName');
+    var gridNamesNumeric = getValue('gridNamesNumeric') === 'true' ? true : false ;
     var gridNames = JSON.parse(getValue('gridNames'));
     var baseUrl = '../service/wmts';
     var style = '';
@@ -75,7 +76,7 @@ window.onload = function() {
             'VERSION': '1.0.0',
             'LAYER': layerName,
             'STYLE': style,
-            'TILEMATRIX': gridsetName + ':{z}',
+            'TILEMATRIX': gridNamesNumeric ? '{z}' : gridsetName + ':{z}',
             'TILEMATRIXSET': gridsetName,
             'FORMAT': format,
             'TILECOL': '{x}',