[WW-4542] FreemarkerManager class throws null pointer exception

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Affects Version/s: 2.3.24
• Fix Version/s: 2.3.28
• Component/s: Plugin - Tags

Environment

Win7
WebLogic 12.1.3
JDK 1.7

• Assignee: Unassigned
• Reporter: Rin Saunders
• Created: 01/Sep/15 17:02
• Updated: 29/Mar/16 10:14
• Resolved: 11/Oct/15 19:29

Description

Am getting a null pointer error in the FreemarkerManager class. It occurs in the setContainer method. The code below seems to assume that getInstanceNames returns an empty set if there are no matches. In fact, it returns a null, which is legit according to the XWork doc. This occurs in Freemarker 2.3.23 under WebLogic 12.1.3.

    Map<String, TagLibrary> oldMap = new HashMap<String, TagLibrary>();
    Set<String> oldPrefixes = container.getInstanceNames(TagLibrary.class);
    for (String prefix : oldPrefixes) {
        oldMap.put(prefix, container.getInstance(TagLibrary.class, prefix));

Not sure if this affects the presentation of Struts2 views. Is there a workaround or fix?