#1830 ClassCast exception loading page

[Marc]

I'm getting ClassCastExceptions when loading certain pages which include links to maps.

java.lang.ClassCastException: com.gargoylesoftware.htmlunit.svg.SvgElement cannot be cast to com.gargoylesoftware.htmlunit.html.HtmlElement
    at com.gargoylesoftware.htmlunit.html.HtmlPage.getDocumentElement(HtmlPage.java:328)
    at com.gargoylesoftware.htmlunit.html.HtmlPage.getBody(HtmlPage.java:336)
    at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.startElement(HTMLParser.java:548)
    at org.apache.xerces.parsers.AbstractSAXParser.startElement(Unknown Source)
    at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.startElement(HTMLParser.java:511)
    at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.callStartElement(HTMLTagBalancer.java:1203)
    at net.sourceforge.htmlunit.cyberneko.HTMLTagBalancer.startElement(HTMLTagBalancer.java:783)
    at net.sourceforge.htmlunit.cyberneko.filters.DefaultFilter.startElement(DefaultFilter.java:137)
    at net.sourceforge.htmlunit.cyberneko.filters.NamespaceBinder.startElement(NamespaceBinder.java:286)
    at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scanStartElement(HTMLScanner.java:2772)
    at net.sourceforge.htmlunit.cyberneko.HTMLScanner$ContentScanner.scan(HTMLScanner.java:2117)
    at net.sourceforge.htmlunit.cyberneko.HTMLScanner.scanDocument(HTMLScanner.java:927)
    at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:506)
    at net.sourceforge.htmlunit.cyberneko.HTMLConfiguration.parse(HTMLConfiguration.java:459)
    at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
    at com.gargoylesoftware.htmlunit.html.HTMLParser$HtmlUnitDOMBuilder.parse(HTMLParser.java:979)
    at com.gargoylesoftware.htmlunit.html.HTMLParser.parse(HTMLParser.java:241)
    at com.gargoylesoftware.htmlunit.html.HTMLParser.parseHtml(HTMLParser.java:187)
    at com.gargoylesoftware.htmlunit.DefaultPageCreator.createHtmlPage(DefaultPageCreator.java:269)
    at com.gargoylesoftware.htmlunit.DefaultPageCreator.createPage(DefaultPageCreator.java:157)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:512)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:386)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:304)
    at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPageIfPossible(BaseFrameElement.java:184)
    at com.gargoylesoftware.htmlunit.html.BaseFrameElement.loadInnerPage(BaseFrameElement.java:122)
    at com.gargoylesoftware.htmlunit.html.HtmlPage.loadFrames(HtmlPage.java:1818)
    at com.gargoylesoftware.htmlunit.html.HtmlPage.initialize(HtmlPage.java:226)
    at com.gargoylesoftware.htmlunit.WebClient.loadWebResponseInto(WebClient.java:519)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:386)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:304)
    at com.gargoylesoftware.htmlunit.WebClient.getPage(WebClient.java:468)
    at com.iccenter.integrationtest.tools.HtmlUnitRunner.browser_getPage(HtmlUnitRunner.java:21)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
    Suppressed: java.lang.ClassCastException: com.gargoylesoftware.htmlunit.svg.SvgElement cannot be cast to com.gargoylesoftware.htmlunit.html.HtmlElement
        at com.gargoylesoftware.htmlunit.html.HtmlPage.getDocumentElement(HtmlPage.java:328)
        at com.gargoylesoftware.htmlunit.html.HtmlPage.executeEventHandlersIfNeeded(HtmlPage.java:1187)
        at com.gargoylesoftware.htmlunit.html.HtmlPage.cleanUp(HtmlPage.java:308)
        at com.gargoylesoftware.htmlunit.WebWindowImpl.removeChildWindow(WebWindowImpl.java:225)
        at com.gargoylesoftware.htmlunit.WebWindowImpl.destroyChildren(WebWindowImpl.java:207)
        at com.gargoylesoftware.htmlunit.TopLevelWindow.close(TopLevelWindow.java:126)
        at com.gargoylesoftware.htmlunit.WebClient.close(WebClient.java:1799)
        at com.iccenter.integrationtest.tools.HtmlUnitRunner.browser_getPage(HtmlUnitRunner.java:22)
        ... 23 more

I'm adding one test which loads a page and throws this exception when running against a particular page (which is not mine, so please don't use in automated tests).

The page is http://www.settmarshausen.de/includes/map.html.

Thanks.

[RBRi]

Ok,i know the root of the problem but have to think about a possible solution.

[Ahmed Ashour]

Well, I guess we should not have SvgPage at all!

Should the below be SvgPage or HtmlPage? It has the svg element rendered, and the javascript saying HTMLDocument.

<svg xmlns="http://www.w3.org/2000/svg">
<rect id="rect" width="50" height="50" fill="green" onclick="alert(document.getElementById('rect'))"/>
<head><title>foo</title><script>
  function test() {
      alert(document);
  }
</script></head><body onload='test()'>
hello<p>
</body></svg>

[Ahmed Ashour]

Well, this proves the page is indeed an HtmlPage.

alert(document.documentElement.outerHTML);

I am deleting/deprecating SvgPage/InteractivPage unless someone complains.

[Ahmed Ashour]

The below case still fails:

<html xmlns="http://www.w3.org/2000/svg">
<rect id="rect" width="50" height="50" fill="green" onclick="alert(document.getElementById('rect'))"/>
<head><title>foo</title><script>
  function test() {
      alert(document.documentElement);
  }
</script></head><body onload='test()'>
hello<p>
</body></html>

[Ahmed Ashour]

Thanks to Ronald, the exception is fixed.

Now, there is another error, but it needs to be isolated as hinted in http://htmlunit.sourceforge.net/submittingJSBugs.html