/**
* Retuns the implicit object of the specified name, or null if not found.
*
* <p>Notice that it does check for the current scope ({@link
* org.zkoss.zk.ui.ext.Scopes#getCurrent}). Rather, {@link org.zkoss.zk.ui.ext.Scopes#getImplicit}
* depends on this method.
*
* @param page the page. If page is null and comp is not, comp.getPage() is assumed
* @see org.zkoss.zk.ui.ext.Scopes#getImplicit
* @since 5.0.0
*/
public static Object getImplicit(Page page, Component comp, String name) {
if (comp != null && page == null) page = getCurrentPage(comp);
if ("log".equals(name)) return _zklog;
if ("self".equals(name)) return comp != null ? comp : (Object) page;
if ("spaceOwner".equals(name)) return comp != null ? comp.getSpaceOwner() : (Object) page;
if ("page".equals(name)) return page;
if ("desktop".equals(name)) return comp != null ? getDesktop(comp) : page.getDesktop();
if ("session".equals(name))
return comp != null ? getSession(comp) : page.getDesktop().getSession();
if ("application".equals(name))
return comp != null ? getWebApp(comp) : page.getDesktop().getWebApp();
if ("componentScope".equals(name))
return comp != null ? comp.getAttributes() : Collections.EMPTY_MAP;
if ("spaceScope".equals(name)) {
final Scope scope = comp != null ? (Scope) comp.getSpaceOwner() : (Scope) page;
return scope != null ? scope.getAttributes() : Collections.EMPTY_MAP;
}
if ("pageScope".equals(name))
return page != null ? page.getAttributes() : Collections.EMPTY_MAP;
if ("desktopScope".equals(name)) {
final Desktop dt = comp != null ? getDesktop(comp) : page.getDesktop();
return dt != null ? dt.getAttributes() : Collections.EMPTY_MAP;
}
if ("sessionScope".equals(name)) {
final Session sess = comp != null ? getSession(comp) : page.getDesktop().getSession();
return sess != null ? sess.getAttributes() : Collections.EMPTY_MAP;
}
if ("applicationScope".equals(name)) {
final WebApp app = comp != null ? getWebApp(comp) : page.getDesktop().getWebApp();
return app != null ? app.getAttributes() : Collections.EMPTY_MAP;
}
if ("requestScope".equals(name)) return REQUEST_SCOPE_PROXY;
if ("execution".equals(name)) return EXECUTION_PROXY;
if ("arg".equals(name)) {
final Execution exec = Executions.getCurrent();
return exec != null ? exec.getArg() : null;
// bug 2937096: composer.arg shall be statically wired
// arg is a Map prepared by application developer, so can be wired statically
}
if ("param".equals(name)) {
final Execution exec = Executions.getCurrent();
return exec != null ? exec.getParameterMap() : null;
// bug 2945974: composer.param shall be statically wired
// Note that request parameter is prepared by servlet container, you shall not
// copy the reference to this map; rather, you shall clone the key-value pair one-by-one.
}
// 20090314, Henri Chen: No way to suppport "event" with an event proxy because
// org.zkoss.zk.Event is not an interface
return null;
}
/**
* Returns the page of the give component, or the current page if the component is null or it
* doesn't belong to any page. The current page is retrieved by {@link
* ExecutionCtrl#getCurrentPage} or the current execution. This method returns null if no
* execution or no current page at all.
*
* @param comp the component to retrieve the page. Ignored if null.
* @since 6.0.0
*/
public static Page getCurrentPage(Component comp) {
if (comp != null) {
Page page = comp.getPage();
if (page != null) return page;
}
final Execution exec = Executions.getCurrent();
return exec != null ? ((ExecutionCtrl) exec).getCurrentPage() : null;
}
private static final Execution exec() {
return Executions.getCurrent();
}
private static Desktop getDesktop(Component comp) {
final Desktop dt = comp.getDesktop();
if (dt != null) return dt;
final Execution exec = Executions.getCurrent();
return exec != null ? exec.getDesktop() : null;
}
protected Map<String, Object> req() {
return Executions.getCurrent().getAttributes();
}
