IllegalStateException thrown when JavaScript resource is opened

[sstyana]

Environment: Pleiades All in One Java, Oxygen (Windows 64bit)

Steps:

1. Switch to JavaEE perspective
2. Make new JavaScript project
3. Open any item under "JavaScript resource" - "ECMAScript built-in library"
4. IllegalStateException thrown

java.lang.IllegalStateException: java.lang.NoSuchMethodException: org.eclipse.wst.jsdt.internal.core.LibraryFragmentRoot.getRawClasspathEntry()
    at mergedoc.encoding.JarResource.setPackageFragmentRoot(JarResource.java:53)
    at mergedoc.encoding.document.ClassFileJarDocument.updateStatus(ClassFileJarDocument.java:51)
    at mergedoc.encoding.document.ActiveDocument.init(ActiveDocument.java:66)
    at mergedoc.encoding.document.ClassFileJarDocument.init(ClassFileJarDocument.java:35)
    at mergedoc.encoding.document.ActiveDocument.<init>(ActiveDocument.java:52)
    at mergedoc.encoding.document.ClassFileJarDocument.<init>(ClassFileJarDocument.java:24)
    at mergedoc.encoding.ActiveDocumentAgent.getDocument(ActiveDocumentAgent.java:128)

ActiveDocumentAgent.getDocument() seems confused with org.eclipse.jdt.internal.ui.javaeditor.InternalClassFileEditorInput (Java editor) and org.eclipse.wst.jsdt.internal.ui.javaeditor.InternalClassFileEditorInput (JavaScript editor).

Possible fix (I've not tried):

at ActiveDocumentAgent.getDocument(), change } else if (editorInput.getClass().getSimpleName().equals("InternalClassFileEditorInput")) { to } else if (editorInput.getClass().getName().equals("org.eclipse.jdt.internal.ui.javaeditor.InternalClassFileEditorInput")) {

event.txt

[cypher256]

Fix open error item in "ECMAScript built-in library". 1.8.5 - 2018.01.19 Thanks for the detailed report.

[sstyana]

I tried 1.8.5, and confirmed the issue was solved. Thanks for quick response.