Eclipse 3.5.1 RCP样式字符串在包导航器中未更新

Question

我有一个问题可能与eclipse 3.5.1有关。我有一个插件，除了其他东西之外，还为已经更改的文件添加了字符串装饰。在Eclipse 3.7.1中一切正常，但在eclipse 3.5.1上的目标应用程序中，导航器不能正确显示样式字符串。

字符串装饰的代码如下（它还添加了文件版本，这也不适用于eclipse 3.5.1）：

public class CustomLabelProvider extends ResourceExtensionLabelProvider implements
    org.eclipse.jface.viewers.DelegatingStyledCellLabelProvider.IStyledLabelProvider {

@Override
public StyledString getStyledText(Object element) {

    StyledString label = new StyledString();

    try {
        Set modifiedFiles =
                CustomContentProvider.getModifiedSegments().get(
                        ((Resource) element).toString().substring(1));
        if ((modifiedFiles != null) && (modifiedFiles.size() > 0)) {
            label.append(">", StyledString.DECORATIONS_STYLER);
        }
        label.append(getText(element));
        if (element instanceof ExtendedFile) {
            Integer fileVersion = ((ExtendedFile) element).getFileVersion();
            if (fileVersion != null) {
                label.append("  ").append(fileVersion.toString(), StyledString.DECORATIONS_STYLER);
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return label;
}

两个eclipse版本之间的比较：

eclipse 3.5.1和3.7.1都实现了IStyledLabelProvider。该插件在两个eclipse版本中启动，osgi将其列为ACTIVE，并且有一些我删除的日志记录，这在两个eclipse版本中都有效。这种行为可能是什么原因？

更新：标签提供程序plugin.xml

<plugin>
<extension
        point="org.eclipse.ui.navigator.viewer">
      <viewer
           viewerId="myApplication.NavigatorView">
      </viewer>

      <viewerContentBinding viewerId="myApplication.NavigatorView">
         <includes>                    
            <contentExtension pattern="NavigatorLabelProvider.NavigatorContent"/>
         </includes>
      </viewerContentBinding>
</extension>

<extension  
     point="org.eclipse.ui.navigator.navigatorContent">

      <navigatorContent
           name="myNavigatorContent"            
           activeByDefault="true"
           contentProvider="labelprovider.CustomContentProvider"
            labelProvider="labelprovider.CustomLabelProvider"                                      
           id="NavigatorLabelProvider.NavigatorContent">        
                  <enablement>
                         <or>        
                            <adapt type="org.eclipse.core.resources.IProject" />
                            <instanceof
                                        value="org.eclipse.core.resources.IResource" />
                         </or>
         </enablement>

        <commonSorter
             class="org.eclipse.ui.internal.navigator.resources.workbench.ResourceExtensionSorter"
             id="org.eclipse.ui.navigator.resources.sorters.defaultSorter">
           <parentExpression>
                          <or>          
                            <instanceof value="org.eclipse.core.resources.IResource" />
                         </or>
                   </parentExpression>
        </commonSorter>
        <dropAssistant
             class="org.eclipse.ui.navigator.resources.ResourceDropAdapterAssistant"
             id="org.eclipse.ui.navigator.resources.resourceDropAdapter">
           <possibleDropTargets>
              <or>
                 <adapt type="org.eclipse.core.resources.IProject"/>
                 <adapt type="org.eclipse.core.resources.IFolder"/>
                 <adapt type="org.eclipse.core.resources.IFile"/>
              </or>
           </possibleDropTargets>
        </dropAssistant>        

        <actionProvider
             class="org.eclipse.ui.internal.navigator.resources.actions.EditActionProvider"
             id="org.eclipse.ui.navigator.resources.actions.EditActions"/>        
        <actionProvider
             class="org.eclipse.ui.internal.navigator.resources.actions.RefactorActionProvider"
             id="org.eclipse.ui.navigator.resources.actions.RefactorActions"/>        

              <!-- Menu Shortcut Actions for Wizards -->
              <commonWizard
                                type="new"
                                        wizardId="org.eclipse.ui.wizards.new.folder">
                                <enablement>
                                        <or>
                                                <adapt type="org.eclipse.core.resources.IFile" />      
                                                <adapt type="org.eclipse.core.resources.IFolder" />
                                        <adapt type="org.eclipse.core.resources.IProject" />
                                <adapt type="org.eclipse.core.resources.IWorkspaceRoot" />     
                                        </or>
                         </enablement>
                        </commonWizard>  
                <commonWizard
                    type="new"
                    wizardId="org.eclipse.ui.wizards.new.file">
                                <enablement>
                                        <or>
                                                <adapt type="org.eclipse.core.resources.IFile" />      
                                                <adapt type="org.eclipse.core.resources.IFolder" />
                                        <adapt type="org.eclipse.core.resources.IProject" />
                                <adapt type="org.eclipse.core.resources.IWorkspaceRoot" />     
                                        </or>
                         </enablement>
                        </commonWizard>                      
      </navigatorContent>
   </extension>
</plugin>