如何让系统走自己的报表编辑器！

  <extension
         point="org.eclipse.ui.editors">
      <editor
            class="my.test.CustomReportEditor"
            default="false"
            extensions="xml"
            icon="platform:/plugin/org.eclipse.birt.report.designer.ui/icons/eview16/report.gif"
            id="org.eclipse.birt.report.designer.ui.editors.ReportEditor"
            name="report">
      </editor>
   </extension>

被重写的java类

   class CustomReportEditor extends ReportEditorProxy{
    dispose()
    setFocus()
    isDirty()
   }