Examples of org.zkoss.zk.ui.IdSpace

org.zkoss.zk.ui.IdSpace
Implemented by a component ( {@link Component}) and a page ( {@link Page}) to denote that all its descendant and itself forms an independent ID space.
In an ID space, ID of each component ( {@link Component#getId}) must be unique. And, you could retrieve any component in the same ID space by calling {@link #getFellow} upon any component of the same ID space.
For sake of description, components in the same ID space are called fellows. If the component has an ancestor which implements {@link IdSpace}, we say a component belongs to the ID space owned by the ancestor. If no such ancestor exists, the component belongs to the ID space owned by the page. The ancestor and the page is called the owner ( {@link Component#getSpaceOwner}).
For sake of description, we also call the ID space as space X, if the owner is component X (or page X). If component Y is a child of X and also implements {@link IdSpace}(aka., another owner), then space X includes component Y, but EXCLUDES descendants of Y. In other words, Y belongs to space X and space Y. Thus, to get a child Z in the Y space, you shall X.getFellow('Y').getFellow('Z').
Example: Assumes component A is a child of B, B a child of C and C a child of D. If only C implements {@link IdSpace}, A, B and C are all belonged to the C space. D doesn't belong any space.
If both C and D implements {@link IdSpace}, C and D belongs to the D space while A, B and C belongs to the C space.
Note: to make a component (deriving from {@link AbstractComponent}) an ID space owner, all it needs to do is to implement this interface. @author tomyeh

   * @return the previous virtual ID space if any
   * @see org.zkoss.zk.ui.impl.SimpleIdSpace
   * @since 5.0.4
   */
  public static IdSpace setVirtualIdSpace(IdSpace idspace) {
    final IdSpace old = getVirtualIdSpace();
    _virtIS.set(idspace);
    return old;
  }

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    if (exec != null) {
      Object o = ZKProxy.getProxy().getSelf((ExecutionCtrl)exec);
      Component self = null; 
      if(o instanceof Component)
        self = (Component) o;
      final IdSpace idspace = 
        self == null ?  ((ExecutionCtrl)exec).getCurrentPage() : self.getSpaceOwner();
      Map idspaceScope = null;
      if (idspace instanceof Component) {
        idspaceScope = (Map) ((Component)idspace).getAttribute(IDSPACE_SCOPE);
        if (idspaceScope == null) {

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  public String getConversationId() {
    final Execution exec = Executions.getCurrent();
    if (exec != null) {
      final Component self = ZKProxy.getProxy().getSelf((ExecutionCtrl)exec);
      final IdSpace idspace = self.getSpaceOwner();
      if (idspace instanceof Component) {
        return ((Component)idspace).getUuid();
      } else {
        return ((Page)idspace).getId();
      }

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  public Object remove(String name) {
    final Execution exec = Executions.getCurrent();
    if (exec != null) {
      final Component self = ZKProxy.getProxy().getSelf((ExecutionCtrl)exec);
      final IdSpace idspace = self.getSpaceOwner();
      Map idspaceScope = null;
      if (idspace instanceof Component) {
        idspaceScope = (Map) ((Component)idspace).getAttribute(IDSPACE_SCOPE);
      } else {
        idspaceScope = (Map) ((Page)idspace).getAttribute(IDSPACE_SCOPE);

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    if ("application".equals(fdname))
      return comp.getDesktop().getWebApp();
    if ("componentScope".equals(fdname))
      return comp.getAttributes();
    if ("spaceScope".equals(fdname)) {
      final IdSpace spaceOwner = comp.getSpaceOwner();
      return (spaceOwner instanceof Page) ? 
          comp.getPage().getAttributes() : ((Component)spaceOwner).getAttributes();
    }
    if ("pageScope".equals(fdname))
      return comp.getPage().getAttributes();

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   * Find a component's path by gathering its space owners ID until a Page.
   */
  private String toPath(Component component){
    StringBuilder path = new StringBuilder();
    
    IdSpace currentIdSpace ;
    if(component instanceof IdSpace)
      currentIdSpace= (IdSpace) component;
    else{
      currentIdSpace = component.getSpaceOwner();
      path.append("/").append(component.getId());

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org.zkoss.spring.security.intercept.zkevent.ZkEventProcessDefinitionSourceImpl

org.zkoss.spring.web.context.request.IdSpaceScope

org.zkoss.spring.webflow.expression.el.ZkELResolver

org.zkoss.zk.ui.sys.ExecutionsCtrl

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