fix #42

src/main/java/jp/sf/fess/taglib/FessFunctions.java

@@ -49,6 +49,16 @@ public class FessFunctions {
         // nothing
     }
 
+    public static Boolean labelExists(final String value) {
+        @SuppressWarnings("unchecked")
+        final Map<String, String> labelValueMap = (Map<String, String>) RequestUtil
+                .getRequest().getAttribute(Constants.LABEL_VALUE_MAP);
+        if (labelValueMap != null) {
+            return labelValueMap.get(value) != null;
+        }
+        return false;
+    }
+
     public static String label(final String value) {
         @SuppressWarnings("unchecked")
         final Map<String, String> labelValueMap = (Map<String, String>) RequestUtil

src/main/webapp/WEB-INF/fe.tld

@@ -11,6 +11,18 @@
   <short-name>fe</short-name>
   <uri>http://fess.codelibs.org/functions</uri>
   
+  <function>
+    <description>
+      Returns a label name.
+    </description>
+    <name>labelexists</name>
+    <function-class>jp.sf.fess.taglib.FessFunctions</function-class>
+    <function-signature>java.lang.Boolean labelExists(java.lang.String)</function-signature>
+    <example>
+      ${fe:labelexists("value")}
+    </example>
+  </function>
+
   <function>
     <description>
       Returns a label name.
@@ -22,7 +34,7 @@
       ${fe:label("value")}
     </example>
   </function>
-  
+
   <function>
     <description>
       Returns a list of hot search words.
@@ -34,7 +46,7 @@
       ${fe:hsw("week", 5)}
     </example>
   </function>
-  
+
   <function>
     <description>
       Returns a size of hot search words.

src/main/webapp/WEB-INF/view/searchResults.jsp

@@ -81,10 +81,10 @@
 			<div class="well span3">
 				<ul class="nav nav-list">
 					<c:forEach var="fieldData" items="${facetResponse.fieldList}">
-						<c:if test="${fieldData.name == 'label'}">
+						<c:if test="${fieldData.name == 'label' && fieldData.valueCountMap.size() > 0}">
 					<li class="nav-header"><bean:message key="label.facet_label_title" /></li>
 							<c:forEach var="countEntry" items="${fieldData.valueCountMap}">
-								<c:if test="${countEntry.value != 0}">
+								<c:if test="${countEntry.value != 0 && fe:labelexists(countEntry.key)}">
 					<li><s:link
 							href="search?query=${f:u(query)}&additional=label:${f:u(countEntry.key)}${pagingQuery}${fe:facetQuery()}${fe:mltQuery()}${fe:geoQuery()}">
 							${f:h(fe:label(countEntry.key))} (${f:h(countEntry.value)})</s:link></li>