Use commons.lang.StringUtils for string manipulation for maven 1.0 compatibility.

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-1/plugins/trunk@407023 13f79535-47bb-0310-9956-ffa450edef68

xdoc/maven.xml

@@ -39,7 +39,10 @@
     <!-- Remove SNAPSHOT -->
     <j:choose>
       <j:when test="${pom.currentVersion.endsWith('-SNAPSHOT')}">
-        <j:set var="currentRelease" value="${pom.currentVersion.substring(0,pom.currentVersion.length()-9)}"/>
+        <j:invokeStatic className="org.apache.commons.lang.StringUtils" method="substringBeforeLast" var="currentRelease">
+          <j:arg value="${pom.currentVersion}" type="java.lang.String"/>
+          <j:arg value="-SNAPSHOT" type="java.lang.String"/>
+        </j:invokeStatic>
       </j:when>
       <j:otherwise>
         <j:set var="currentRelease" value="${pom.currentVersion}"/>