ClassCastException in Rhino when creating a continuation in a catch block
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Key: COCOON-2006
URL: https://issues.apache.org/jira/browse/COCOON-2006
Project: Cocoon
Issue Type: Bug
Components: - Flowscript
Affects Versions: 2.1.10
Reporter: Rob Berens
In our example we use a dialog from within a catch block in javascript e.g. to
ask for confirmation if a file already exists. It looks like this:
try {
write file
catch (ex if ex.javaexception instanceof MyFileAlreadyExistsException) {
if (overwriteDialog("Overwrite")) {
overwrite file
}
}
function overwriteDialog(message) {
var form = new Form("path/to/dialog.fd");
var formWidget = form.form;
formWidget.lookupWidget("message").setValue(message);
form.showForm("/flow/path/to/dialog.html");
return "ok".equals(form.submitId);
}
In the overwrite dialog a form is created and shown thereby effectively
creating a continuation. Formerly when using 2.1.8 this worked fine. In 2.1.10
we get a ClassCastException with the stack shown below.
When changing the code like this, there is no problem:
var exists = false;
try {
write file
catch (ex if ex.javaexception instanceof MyFileAlreadyExistsException) {
exists = true;
}
if (exists && overwriteDialog("Overwrite")) {
overwrite file
}
I did some investigation in Rhino and found out that the enterFrames as
referred in org.mozilla.javascript.Interpreter at line 2407 contain a frame
that has a scope of class NativeWith which in the end leads to the
ClassCastException.
Thread [PoolThread-3] (Suspended (exception java.lang.ClassCastException))
org.mozilla.javascript.ScriptRuntime.enterActivationFunction(org.mozilla.javascript.Context,
org.mozilla.javascript.Scriptable) line: 2847
org.mozilla.javascript.Interpreter.enterFrame(org.mozilla.javascript.Context,
org.mozilla.javascript.Interpreter$CallFrame, java.lang.Object[]) line: 3855
org.mozilla.javascript.Interpreter.interpretLoop(org.mozilla.javascript.Context,
org.mozilla.javascript.Interpreter$CallFrame, java.lang.Object) line: 2408
org.mozilla.javascript.Interpreter.interpret(org.mozilla.javascript.InterpretedFunction,
org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable,
org.mozilla.javascript.Scriptable, java.lang.Object[]) line: 2251
org.mozilla.javascript.InterpretedFunction.call(org.mozilla.javascript.Context,
org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable,
java.lang.Object[]) line: 161
org.mozilla.javascript.ContextFactory.doTopCall(org.mozilla.javascript.Callable,
org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable,
org.mozilla.javascript.Scriptable, java.lang.Object[]) line: 340
org.mozilla.javascript.ScriptRuntime.doTopCall(org.mozilla.javascript.Callable,
org.mozilla.javascript.Context, org.mozilla.javascript.Scriptable,
org.mozilla.javascript.Scriptable, java.lang.Object[]) line: 2758
org.mozilla.javascript.InterpretedFunction.call(org.mozilla.javascript.Context,
org.mozilla.javascript.Scriptable, org.mozilla.javascript.Scriptable,
java.lang.Object[]) line: 159
org.mozilla.javascript.Context.call(org.mozilla.javascript.ContextFactory,
org.mozilla.javascript.Callable, org.mozilla.javascript.Scriptable,
org.mozilla.javascript.Scriptable, java.lang.Object[]) line: 489
org.mozilla.javascript.ScriptableObject.callMethod(org.mozilla.javascript.Context,
org.mozilla.javascript.Scriptable, java.lang.String, java.lang.Object[]) line:
1556
org.mozilla.javascript.ScriptableObject.callMethod(org.mozilla.javascript.Scriptable,
java.lang.String, java.lang.Object[]) line: 1526
org.apache.cocoon.components.flow.javascript.fom.FOM_JavaScriptInterpreter.handleContinuation(java.lang.String,
java.util.List, org.apache.cocoon.environment.Redirector) line: 842
org.apache.cocoon.components.treeprocessor.sitemap.CallFunctionNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 124
org.apache.cocoon.components.treeprocessor.sitemap.SelectNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 69
org.apache.cocoon.components.treeprocessor.sitemap.SelectNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 103
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext, java.lang.String,
java.util.Map) line: 47
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 108
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 69
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 143
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 69
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 93
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 235
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(org.apache.cocoon.environment.Environment)
line: 177
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(org.apache.cocoon.environment.Environment)
line: 253
org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 118
org.apache.cocoon.components.treeprocessor.sitemap.SelectNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 69
org.apache.cocoon.components.treeprocessor.sitemap.SelectNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 103
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext, java.lang.String,
java.util.Map) line: 47
org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 108
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 69
org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 143
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode(org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode).invokeNodes(org.apache.cocoon.components.treeprocessor.ProcessingNode[],
org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 69
org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 93
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(org.apache.cocoon.environment.Environment,
org.apache.cocoon.components.treeprocessor.InvokeContext) line: 235
org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(org.apache.cocoon.environment.Environment)
line: 177
org.apache.cocoon.components.treeprocessor.TreeProcessor.process(org.apache.cocoon.environment.Environment)
line: 253
org.apache.cocoon.Cocoon.process(org.apache.cocoon.environment.Environment)
line: 699
org.apache.cocoon.servlet.CocoonServlet.service(javax.servlet.http.HttpServletRequest,
javax.servlet.http.HttpServletResponse) line: 1154
org.apache.cocoon.servlet.CocoonServlet(javax.servlet.http.HttpServlet).service(javax.servlet.ServletRequest,
javax.servlet.ServletResponse) line: 853
org.mortbay.jetty.servlet.ServletHolder.handle(javax.servlet.ServletRequest,
javax.servlet.ServletResponse) line: 358
org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(java.lang.String,
javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse,
org.mortbay.jetty.servlet.ServletHolder) line: 294
org.mortbay.jetty.servlet.WebApplicationHandler(org.mortbay.jetty.servlet.ServletHandler).handle(java.lang.String,
java.lang.String, org.mortbay.http.HttpRequest, org.mortbay.http.HttpResponse)
line: 567
org.mortbay.jetty.servlet.WebApplicationContext(org.mortbay.http.HttpContext).handle(java.lang.String,
java.lang.String, org.mortbay.http.HttpRequest, org.mortbay.http.HttpResponse)
line: 1807
org.mortbay.jetty.servlet.WebApplicationContext.handle(java.lang.String,
java.lang.String, org.mortbay.http.HttpRequest, org.mortbay.http.HttpResponse)
line: 525
org.mortbay.jetty.servlet.WebApplicationContext(org.mortbay.http.HttpContext).handle(org.mortbay.http.HttpRequest,
org.mortbay.http.HttpResponse) line: 1757
org.mortbay.jetty.Server(org.mortbay.http.HttpServer).service(org.mortbay.http.HttpRequest,
org.mortbay.http.HttpResponse) line: 879
org.mortbay.http.HttpConnection.service(org.mortbay.http.HttpRequest,
org.mortbay.http.HttpResponse) line: 789
org.mortbay.http.HttpConnection.handleNext() line: 960
org.mortbay.http.HttpConnection.handle() line: 806
org.mortbay.http.SocketListener.handleConnection(java.net.Socket) line:
218
org.mortbay.http.SocketListener(org.mortbay.util.ThreadedServer).handle(java.lang.Object)
line: 300
org.mortbay.util.ThreadPool$PoolThread.run() line: 511
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