import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
public SpoonPerspective getPerspective() {
  if (isInstaviewInstalled()) {
    // Only register the Instaview perspective if the plugin is installed
    return AgileBiInstaPerspective.getInstance();
  }
  return null;
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
@Override
public SpoonPerspective getPerspective() {
  return perspective;
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
public SpoonPerspective getPerspective() {
  return null;
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
@Override
public SpoonPerspective getPerspective() {
  return null;
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
@Override
public SpoonPerspective getPerspective() {
    return null;
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
public SpoonPerspective getPerspective() {
  return StarModelerPerspective.getInstance();
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
public AgileBiInstaPerspective() {
  super("org/pentaho/agilebi/spoon/perspective/insta_browser.xul"); //$NON-NLS-1$

  addPerspectiveListener(this);

  final AgileBiInstaPerspective thisPerspective = this;
  // Set the last perspective so we're never without one
  lastPerspective = this;

  // Register perspective listeners after all loading is complete so we
  // get them all
  display = Display.getCurrent();

  try {
    browser = (XulBrowser) container.getDocumentRoot().getElementById("web_browser"); //$NON-NLS-1$
  } catch (Exception e) {
    e.printStackTrace();//logger.error(e);
  }

  display.asyncExec(new Runnable() {
    @Override
    public void run() {
      browser.setSrc(new File(new File("").getAbsolutePath() + "/plugins/spoon/agile-bi/ui/instaview_load.html")
          .toURI().toString());

      // Add listeners to all perspectives so we can switch back to the last active one
      // in the event there are unsaved changes and the user elects to not return to Instaview
      for (final SpoonPerspective sp : SpoonPerspectiveManager.getInstance().getPerspectives()) {
        sp.addPerspectiveListener(new SpoonPerspectiveListener() {
          @Override
          public void onActivation() {
            if (sp != thisPerspective) {
              lastPerspective = sp;
            }
          }

          @Override
          public void onDeactication() {
          }
        });
      }
    }
  });
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
public SpoonPerspective getPerspective() {
  return AgileBiModelerPerspective.getInstance();
}
 

import org.pentaho.di.ui.spoon.SpoonPerspective; //导入依赖的package包/类
@Override
public SpoonPerspective getPerspective() {
  // no perspective
  return null;
}