我正在編寫基於NetBeans平臺(7.4)的應用程序,並且已創建自定義的ProjecType和FileType。 ProjectType有一個弱文件更改偵聽器,用於刪除項目文件夾中的新文件。問題是,如果我打開一個項目,關閉它,然後再次嘗試重新打開它,它運行的內存,要麼拋出一個異常互斥:NetBeans平臺重新打開已關閉的項目StackOverflowError
塊引用java.lang.IllegalStateException:不應獲得Children.MUTEX同時保持ProjectManager.mutex
或IllegalStateException異常:
塊引用java.lang.IllegalStateException:在org.openide.nodes.Node.assignTo(Node.java:354) 在org.openide.nodes.EntrySupportDefault.justCo mputeNodes(EntrySupportDefault.java:212) at org.openide.nodes.ChildrenArray.nodes(ChildrenArray.java:88) at org.openide.nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:130) at org.openide。 nodes.EntrySupportDefault.getNodes(EntrySupportDefault.java:172) 在org.openide.nodes.Children.getNodes(Children.java:469)
另一個有趣的事情是,如果我關閉該項目並進行小更改爲項目文件夾,例如將其移動到新位置,或者甚至只是在該文件夾內打開文件,當我嘗試重新加載它時,它工作正常。 我已經嘗試完全刪除弱文件偵聽器,但沒有成功。而且我知道不是文件更改偵聽器問題,因爲Windows不會阻止我操作項目文件夾中的文件。 Bellow是我的ProjectNodeFactory,它爲項目文件夾中每個可識別的文件類型創建子節點。
public class MyProjectNodeFactory extends ChildFactory<FileObject> implements FileChangeListener {
private final FileObject projectFolder;
public MyProjectNodeFactory(MyProjectNode project) {
this.projectFolder = project.getProjectDirectory();
project.addFileChangeListener(this);
refresh(true);
}
@Override
protected boolean createKeys(List<FileObject> list) {
for (FileObject fileObject : Collections.list(projectFolder.getData(false)))
{
if (fileObject.getExt().equals(Bundle.MY_FILETYPE_EXTENSION())) {
list.add(fileObject);
}
}
return true;
}
@Override
protected Node[] createNodesForKey(FileObject key) {
ArrayList<Node> nodes = new ArrayList<Node>();
// Add data files
try {
if(key.getExt().equals(Bundle.MY_FYLETYPE_EXTENSION()))
{
nodes.add(DataObject.find(key).getNodeDelegate());
}
} catch (DataObjectNotFoundException ex) {
Exceptions.printStackTrace(ex);
}
return (nodes.toArray(new Node[nodes.size()]));
}
另外我ProjecType LogicalView和ProjectNode
public class MyProjectType implements Project {
private final FileObject projectDir;
private final ProjectState state;
private FileChangeListener fileChangeListener;
private Lookup lkp;
MyProjectType(FileObject dir, ProjectState state) {
this.projectDir = dir;
this.state = state;
}
@Override
public FileObject getProjectDirectory() {
return projectDir;
}
@Override
public Lookup getLookup() {
if (lkp == null) {
lkp = Lookups.fixed(new Object[]{
// register your features here
this,
new MyProjectInfo(),
new MyProjectLogicalView(this),});
}
return lkp;
}
public void addFileChangeListener(FileChangeListener regularFileChangeListener) {
this.fileChangeListener = (FileChangeListener)WeakListeners.create(FileChangeListener.class, regularFileChangeListener, this.projectDir.getPath());
this.projectDir.addFileChangeListener(fileChangeListener);
}
public void removeFileChangeListeners() {
if(fileChangeListener!=null)
this.projectDir.removeFileChangeListener(fileChangeListener);
}
private final class MyProjectInfo implements ProjectInformation {
@StaticResource()
public static final String PROJECT_ICON = "projectIcon.png";
..................
}
class MyProjectLogicalView implements LogicalViewProvider {
@StaticResource()
public static final String PROJECT_ICON = "projectIcon.png";
private final MyProjectType project;
public MyProjectLogicalView(MyProjectType project) {
this.project = project;
}
@Override
public Node createLogicalView() {
try {
FileObject projectDirectory = project.getProjectDirectory();
DataFolder projectFolder = DataFolder.findFolder(projectDirectory);
Node nodeOfProjectFolder = projectFolder.getNodeDelegate();
return new ProjectNode(nodeOfProjectFolder, project);
} catch (DataObjectNotFoundException donfe) {
Exceptions.printStackTrace(donfe);
return new AbstractNode(Children.LEAF);
}
}
private final class ProjectNode extends FilterNode {
final MyProjectType project;
public ProjectNode(Node node, MyProjectType project)
throws DataObjectNotFoundException {
super(node,
Children.create(new MyProjectNodeFactory(project),true),
new ProxyLookup(
new Lookup[]{
Lookups.singleton(project),
node.getLookup()
}));
this.project = project;
}
@Override
public Action[] getActions(boolean arg0) {
return new Action[]{
CommonProjectActions.newFileAction(),
CommonProjectActions.copyProjectAction(),
CommonProjectActions.deleteProjectAction(),
CommonProjectActions.closeProjectAction()
};
}
...............
}
}