No top level scope?

[cs02rm0]

Hi

I'm reworking a Javascript webscript into a Java one. The Java one now extends DeclarativeWebscript and returns a Map of Lists of Maps, etc. down to a ScriptNode.

item.put("node", new ScriptNode(nodeRef, _serviceRegistry));
‍‍

The freemarker which takes the model from the Java is erroring:

…
Caused by: freemarker.template.TemplateModelException: get(properties) failed on instance of org.alfresco.repo.jscript.ScriptNode
…
Caused by: java.lang.reflect.InvocationTargetException
…
Caused by: java.lang.NullPointerException
   at org.mozilla.javascript.ScriptableObject.getTopLevelScope(ScriptableObject.java:1483)
   at org.mozilla.javascript.ScriptRuntime.setObjectProtoAndParent(ScriptRuntime.java:3106)
   at org.mozilla.javascript.Context.newArray(Context.java:1547)
   at org.alfresco.repo.jscript.ValueConverter.convertValueForScript(ValueConverter.java:121)
   at org.alfresco.repo.jscript.ScriptNode$NodeValueConverter.convertValueForScript(ScriptNode.java:3258)
   at org.alfresco.repo.jscript.ScriptNode$NodeValueConverter.convertValueForScript(ScriptNode.java:3237)
   at org.alfresco.repo.jscript.ScriptNode.getProperties(ScriptNode.java:835)
   … 116 more‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Any suggestions on why there isn't a top level scope / how I can get one? Thanks.

[mitpatoliya]

did you mean you have changed your webscript form javascript based to java backed webscript and now you are facing problem in the ftl?
could you post your ftl?

[electroshokker]

If anyone still wants to know how to properly instantiate ScriptNode from a pure java-backed webscript, here's how:

Context context = Context.enter();
Scriptable scope = context.initStandardObjects();
try
{
     scriptNode = new ScriptNode(nodeRef, services, scope);
}
finally
{
     Context.exit();
}
‍‍‍‍‍‍‍‍‍‍‍‍

For more explanation, see https://developer.mozilla.org/en-US/docs/Mozilla/Projects/Rhino/Scopes_and_Contexts

Basically, while the alfresco code supports creating ScripNode instances without a context and scope, many of the ScriptNode methods actually require a context and scope, or they will throw NullpointerExceptions.

This is still true in Alfresco 5