Java Eclipse插件IFile只读属性更改

我正在开发一个Eclipse插件，它以只读状态加载所有项目文件（IFile）

        ResourceAttributes resAttr = new ResourceAttributes();
        resAttr.setReadOnly(true);
        classFile.setResourceAttributes(resAttr);

现在，当用户开始在JavaEditor中写入内容时，会显示一个消息框：

File ABC.java is read-only. Do you wish to make it writable?

我想捕获用户的答案，因为有些文件不应该是只读的

为了做到这一点，我实现了一个IElementChangedListener，但我不知道如何获取IFile只读属性是否更改

class SinfoniaCloudElementChangedListener implements IElementChangedListener {

@Override
public void elementChanged(ElementChangedEvent event) {
  Activator.logInfo("SinfoniaCloudElementChangedListener - elementChanged");
  try {
    handleDelta(event.getDelta());
  } catch (JavaModelException e) {
    Activator.logError("Error handling delta for ElementChangeListener. ", e);
  }
}

private void handleDelta(IJavaElementDelta delta) throws JavaModelException {
  IJavaElement element = delta.getElement();
  if (element instanceof ICompilationUnit) {
    IJavaProject project = element.getJavaProject();
    if (project.getElementName().equals(SinfoniaProject.getProjectName(true)) == false) {
      return;
    }

    ICompilationUnit cu = (ICompilationUnit) element;
    for (IType type : cu.getAllTypes()) {
      if (type != IType.CLASS_FILE)
        continue;

      switch (delta.getKind()) {
        case IJavaElementDelta.CHANGED:
            Activator.logInfo("CHANGED - Element:" + cu.getElementName());
            // ?????????????????????????????
            break;
           default:
            // do nothing
            break;
        }
    }
  }
  for (IJavaElementDelta child : delta.getAffectedChildren()) {
    handleDelta(child);
  }
 }
}

class ABCResourceChangeListener implements IResourceChangeListener {

@Override
public void resourceChanged(IResourceChangeEvent event) {
       IResource res = event.getResource();
       try {
         switch (event.getType()) {
            case IResourceChangeEvent.PRE_CLOSE:
               System.out.print("Project ");
               System.out.print(res.getFullPath());
               System.out.println(" is about to close.");
               break;
            case IResourceChangeEvent.PRE_DELETE:
               System.out.print("Project ");
               System.out.print(res.getFullPath());
               System.out.println(" is about to be deleted.");
               break;
            case IResourceChangeEvent.POST_CHANGE:
               System.out.println("Resources have changed.");
        event.getDelta().accept(new DeltaPrinter());
               break;
            case IResourceChangeEvent.PRE_BUILD:
               System.out.println("Build about to run.");
               event.getDelta().accept(new DeltaPrinter());
               break;
            case IResourceChangeEvent.POST_BUILD:
               System.out.println("Build complete.");
               event.getDelta().accept(new DeltaPrinter());
               break;
         }
  } catch (CoreException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
  }
}
}

class DeltaPrinter implements IResourceDeltaVisitor {
public boolean visit(IResourceDelta delta) {
  IResource res = delta.getResource();
  switch (delta.getKind()) {
    case IResourceDelta.ADDED:
      System.out.print("Resource ");
      System.out.print(res.getFullPath());
      System.out.println(" was added.");
      break;
    case IResourceDelta.REMOVED:
      System.out.print("Resource ");
      System.out.print(res.getFullPath());
      System.out.println(" was removed.");
      break;
    case IResourceDelta.CHANGED:
      System.out.print("Resource ");
      System.out.print(res.getFullPath());
      System.out.println(" has changed.");
      int flags = delta.getFlags();
      if ((flags & IResourceDelta.CONTENT) != 0) {
        System.out.println("--> Content Change");
        // ?????????????????????????
      }
      if ((flags & IResourceDelta.REPLACED) != 0) {
        System.out.println("--> Content Replaced");
      }
      if ((flags & IResourceDelta.MARKERS) != 0) {
        System.out.println("--> Marker Change");
        IMarkerDelta[] markers = delta.getMarkerDeltas();
        // if interested in markers, check these deltas
        for (int j=0; j<markers.length;j++) {
          IMarkerDelta markerDelta = markers[j];
          if (markerDelta.isSubtypeOf(IMarker.SOURCE_ID)) {
            switch (markerDelta.getKind()) {
              case IResourceDelta.ADDED :
                System.out.println("--> Marker Delta Added " );
                break;
              case IResourceDelta.REMOVED :
                System.out.println("--> Marker Delta Removed " );
                break;
              case IResourceDelta.CHANGED:
                System.out.println("--> Marker Delta Changed ");
                break;
            }
          }
        }

      }
      break;
  }
  return true; // visit the children
}
}

多谢各位

==

根据Andrew的建议，IElementChangedListener已被IResourceChangeListener替换，但是我仍然不知道如何确定IResource只读属性是否已更改

class SinfoniaCloudElementChangedListener implements IElementChangedListener {

@Override
public void elementChanged(ElementChangedEvent event) {
  Activator.logInfo("SinfoniaCloudElementChangedListener - elementChanged");
  try {
    handleDelta(event.getDelta());
  } catch (JavaModelException e) {
    Activator.logError("Error handling delta for ElementChangeListener. ", e);
  }
}

private void handleDelta(IJavaElementDelta delta) throws JavaModelException {
  IJavaElement element = delta.getElement();
  if (element instanceof ICompilationUnit) {
    IJavaProject project = element.getJavaProject();
    if (project.getElementName().equals(SinfoniaProject.getProjectName(true)) == false) {
      return;
    }

    ICompilationUnit cu = (ICompilationUnit) element;
    for (IType type : cu.getAllTypes()) {
      if (type != IType.CLASS_FILE)
        continue;

      switch (delta.getKind()) {
        case IJavaElementDelta.CHANGED:
            Activator.logInfo("CHANGED - Element:" + cu.getElementName());
            // ?????????????????????????????
            break;
           default:
            // do nothing
            break;
        }
    }
  }
  for (IJavaElementDelta child : delta.getAffectedChildren()) {
    handleDelta(child);
  }
 }
}

class ABCResourceChangeListener implements IResourceChangeListener {

@Override
public void resourceChanged(IResourceChangeEvent event) {
       IResource res = event.getResource();
       try {
         switch (event.getType()) {
            case IResourceChangeEvent.PRE_CLOSE:
               System.out.print("Project ");
               System.out.print(res.getFullPath());
               System.out.println(" is about to close.");
               break;
            case IResourceChangeEvent.PRE_DELETE:
               System.out.print("Project ");
               System.out.print(res.getFullPath());
               System.out.println(" is about to be deleted.");
               break;
            case IResourceChangeEvent.POST_CHANGE:
               System.out.println("Resources have changed.");
        event.getDelta().accept(new DeltaPrinter());
               break;
            case IResourceChangeEvent.PRE_BUILD:
               System.out.println("Build about to run.");
               event.getDelta().accept(new DeltaPrinter());
               break;
            case IResourceChangeEvent.POST_BUILD:
               System.out.println("Build complete.");
               event.getDelta().accept(new DeltaPrinter());
               break;
         }
  } catch (CoreException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
  }
}
}

class DeltaPrinter implements IResourceDeltaVisitor {
public boolean visit(IResourceDelta delta) {
  IResource res = delta.getResource();
  switch (delta.getKind()) {
    case IResourceDelta.ADDED:
      System.out.print("Resource ");
      System.out.print(res.getFullPath());
      System.out.println(" was added.");
      break;
    case IResourceDelta.REMOVED:
      System.out.print("Resource ");
      System.out.print(res.getFullPath());
      System.out.println(" was removed.");
      break;
    case IResourceDelta.CHANGED:
      System.out.print("Resource ");
      System.out.print(res.getFullPath());
      System.out.println(" has changed.");
      int flags = delta.getFlags();
      if ((flags & IResourceDelta.CONTENT) != 0) {
        System.out.println("--> Content Change");
        // ?????????????????????????
      }
      if ((flags & IResourceDelta.REPLACED) != 0) {
        System.out.println("--> Content Replaced");
      }
      if ((flags & IResourceDelta.MARKERS) != 0) {
        System.out.println("--> Marker Change");
        IMarkerDelta[] markers = delta.getMarkerDeltas();
        // if interested in markers, check these deltas
        for (int j=0; j<markers.length;j++) {
          IMarkerDelta markerDelta = markers[j];
          if (markerDelta.isSubtypeOf(IMarker.SOURCE_ID)) {
            switch (markerDelta.getKind()) {
              case IResourceDelta.ADDED :
                System.out.println("--> Marker Delta Added " );
                break;
              case IResourceDelta.REMOVED :
                System.out.println("--> Marker Delta Removed " );
                break;
              case IResourceDelta.CHANGED:
                System.out.println("--> Marker Delta Changed ");
                break;
            }
          }
        }

      }
      break;
  }
  return true; // visit the children
}
}

类ABCResourceChangeListener实现IResourceChangeListener{ @凌驾 public void resourceChanged（IResourceChangeEvent事件）{ IResource res=event.getResource（）； 试一试{ 开关（event.getType（））{ 案例IResourceChangeEvent.PRE_关闭： 系统输出打印（“项目”）； System.out.print（res.getFullPath（））； System.out.println（“即将关闭”）； 打破 案例IResourceChangeEvent.PRE_删除： 系统输出打印（“项目”）； System.out.print（res.getFullPath（））； System.out.println（“即将被删除”）； 打破 案例IResourceChangeEvent.POST\u更改： System.out.println（“资源已更改”）； event.getDelta（）.accept（新的DeltaPrinter（））； 打破 案例IResourceChangeEvent.PRE_构建： System.out.println（“构建即将运行”）； event.getDelta（）.accept（新的DeltaPrinter（））； 打破 案例IResourceChangeEvent.POST_生成： System.out.println（“构建完成”）； event.getDelta（）.accept（新的DeltaPrinter（））； 打破 } }捕获（COREE）{ //TODO自动生成的捕捉块 e、 printStackTrace（）； } } } 类DeltaPrinter实现IResourceDeltaVisitor{ 公共布尔访问（IResourceDelta）{ IResource res=delta.getResource（）； 开关（delta.getKind（））{ 案例IResourceDelta.ADDED： 系统输出打印（“资源”）； System.out.print（res.getFullPath（））； System.out.println（“已添加”）； 打破 案例IResourceDelta.REMOVED： 系统输出打印（“资源”）； System.out.print（res.getFullPath（））； System.out.println（“已删除”）； 打破 案例IResourceDelta.CHANGED： 系统输出打印（“资源”）； System.out.print（res.getFullPath（））； System.out.println（“已更改”）； int flags=delta.getFlags（）； 如果（（标志和IResourceDelta.CONTENT）！=0）{ System.out.println（“-->Content Change”）； // ????????????????????????? } 如果（（标志和IResourceDelta.REPLACED）！=0）{ System.out.println（“-->替换内容”）； } 如果（（标志和IResourceDelta.MARKERS）！=0）{ System.out.println（“-->Marker Change”）； IMarkerDelta[]markers=delta.getMarkerDeltas（）； //如果对标记感兴趣，请检查这些增量

---

for（int j=0；j

IElementChangedListener

不是您想要的。您应该使用

IResourceChangeListener

。侦听器侦听

IResourceDelta

s。

IResourceDelta

有一个名为

getFlags（）

的方法，该方法将返回您想要的内容

---

有关更多信息，请参见javadoc for

IWorkspace.addResourceChangeListener（IResourceChangeListener，int）

。

您好，因此我将IElementChangedListener更改为IResourceChangeListener，并获得了方法getFlags。但是我仍然不知道如何确定IFile只读属性是否更改。