[jboss-user] [JBoss Seam] - Re: Very strange exception

[gus888]

I guess that the exception listed in first thread was from Tomahawk tree2 component. When using tree2 with facelets, it needs a Tree2TagHandler. The code is listed as follows(from myfaces wiki), but I haven't got chance to test it.
import java.util.Map;
  | 
  | import javax.faces.component.UIComponent;
  | 
  | import org.apache.myfaces.custom.tree2.HtmlTree;
  | import org.apache.myfaces.renderkit.JSFAttr;
  | 
  | import com.sun.facelets.FaceletContext;
  | import com.sun.facelets.tag.MetaRuleset;
  | import com.sun.facelets.tag.jsf.ComponentConfig;
  | import com.sun.facelets.tag.jsf.ComponentHandler;
  | 
  | public class Tree2TagHandler
  |   extends ComponentHandler
  | {
  |   public Tree2TagHandler(ComponentConfig cfg)
  |   {
  |     super(cfg);
  |   }
  |   
  |   @Override
  |   @SuppressWarnings("unchecked")
  |   protected void onComponentCreated(FaceletContext ctx, UIComponent c, UIComponent parent)
  |   {
  |     super.onComponentCreated(ctx, c, parent);
  |     
  |     HtmlTree component = (HtmlTree)c;
  |     
  |     Map attrs = component.getAttributes();
  |     ensureBoolean(attrs, JSFAttr.SHOW_NAV);
  |     ensureBoolean(attrs, JSFAttr.SHOW_LINES);
  |     ensureBoolean(attrs, JSFAttr.CLIENT_SIDE_TOGGLE);
  |     ensureBoolean(attrs, JSFAttr.SHOW_ROOT_NODE);
  |     ensureBoolean(attrs, JSFAttr.PRESERVE_TOGGLE);
  |   }
  |   
  |   @SuppressWarnings("unchecked")
  |   private void ensureBoolean(Map attributes, String attrName)
  |   {
  |     Object value = attributes.get(attrName);
  |     if (value == null || !(value instanceof String)) return;
  |     attributes.put(attrName, Boolean.valueOf((String)value));
  |   }
  |   
  |   @Override
  |   protected MetaRuleset createMetaRuleset(Class type)
  |   {
  |     return super.createMetaRuleset(type)
  |       .alias("showNav", JSFAttr.SHOW_NAV)
  |       .alias("showLines", JSFAttr.SHOW_LINES)
  |       .alias("clientSideToggle", JSFAttr.CLIENT_SIDE_TOGGLE)
  |       .alias("showRootNode", JSFAttr.SHOW_ROOT_NODE)
  |       .alias("preserveToggle", JSFAttr.PRESERVE_TOGGLE);      
  |   }
  | }

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