Well i am refering here the jsfutil class for my reference.this code doesn’t written by me.But it is very helpful for ADF developer.
import java.util.Iterator; import java.util.Locale; import java.util.Map; import java.util.MissingResourceException; import java.util.ResourceBundle; import javax.el.ELContext; import javax.el.ExpressionFactory; import javax.el.MethodExpression; import javax.el.ValueExpression; import javax.faces.application.Application; import javax.faces.application.FacesMessage; import javax.faces.component.UIComponent; import javax.faces.component.UIViewRoot; import javax.faces.context.ExternalContext; import javax.faces.context.FacesContext; import javax.servlet.http.HttpServletRequest; import oracle.adf.model.binding.DCBindingContainer; /** * General useful static utilies for working with JSF. * NOTE: Updated to use JSF 1.2 ExpressionFactory. * */ public class JSFUtils { private static final String NO_RESOURCE_FOUND = "Missing resource: "; /** * Method for taking a reference to a JSF binding expression and returning * the matching object (or creating it). * @param expression EL expression * @return Managed object */ public static Object resolveExpression(String expression) { FacesContext facesContext = getFacesContext(); Application app = facesContext.getApplication(); ExpressionFactory elFactory = app.getExpressionFactory(); ELContext elContext = facesContext.getELContext(); ValueExpression valueExp = elFactory.createValueExpression(elContext, expression, Object.class); return valueExp.getValue(elContext); } public static String resolveRemoteUser() { FacesContext facesContext = getFacesContext(); ExternalContext ectx = facesContext.getExternalContext(); return ectx.getRemoteUser(); } public static String resolveUserPrincipal() { FacesContext facesContext = getFacesContext(); ExternalContext ectx = facesContext.getExternalContext(); HttpServletRequest request = (HttpServletRequest)ectx.getRequest(); return request.getUserPrincipal().getName(); } public static Object resloveMethodExpression(String expression, Class returnType, Class[] argTypes, Object[] argValues) { FacesContext facesContext = getFacesContext(); Application app = facesContext.getApplication(); ExpressionFactory elFactory = app.getExpressionFactory(); ELContext elContext = facesContext.getELContext(); MethodExpression methodExpression = elFactory.createMethodExpression(elContext, expression, returnType, argTypes); return methodExpression.invoke(elContext, argValues); } /** * Method for taking a reference to a JSF binding expression and returning * the matching Boolean. * @param expression EL expression * @return Managed object */ public static Boolean resolveExpressionAsBoolean(String expression) { return (Boolean)resolveExpression(expression); } /** * Method for taking a reference to a JSF binding expression and returning * the matching String (or creating it). * @param expression EL expression * @return Managed object */ public static String resolveExpressionAsString(String expression) { return (String)resolveExpression(expression); } /** * Convenience method for resolving a reference to a managed bean by name * rather than by expression. * @param beanName name of managed bean * @return Managed object */ public static Object getManagedBeanValue(String beanName) { StringBuffer buff = new StringBuffer("#{"); buff.append(beanName); buff.append("}"); return resolveExpression(buff.toString()); } /** * Method for setting a new object into a JSF managed bean * Note: will fail silently if the supplied object does * not match the type of the managed bean. * @param expression EL expression * @param newValue new value to set */ public static void setExpressionValue(String expression, Object newValue) { FacesContext facesContext = getFacesContext(); Application app = facesContext.getApplication(); ExpressionFactory elFactory = app.getExpressionFactory(); ELContext elContext = facesContext.getELContext(); ValueExpression valueExp = elFactory.createValueExpression(elContext, expression, Object.class); //Check that the input newValue can be cast to the property type //expected by the managed bean. //If the managed Bean expects a primitive we rely on Auto-Unboxing Class bindClass = valueExp.getType(elContext); if (bindClass.isPrimitive() || bindClass.isInstance(newValue)) { valueExp.setValue(elContext, newValue); } } /** * Convenience method for setting the value of a managed bean by name * rather than by expression. * @param beanName name of managed bean * @param newValue new value to set */ public static void setManagedBeanValue(String beanName, Object newValue) { StringBuffer buff = new StringBuffer("#{"); buff.append(beanName); buff.append("}"); setExpressionValue(buff.toString(), newValue); } /** * Convenience method for setting Session variables. * @param key object key * @param object value to store */ public static void storeOnSession(String key, Object object) { FacesContext ctx = getFacesContext(); Map sessionState = ctx.getExternalContext().getSessionMap(); sessionState.put(key, object); } /** * Convenience method for getting Session variables. * @param key object key * @return session object for key */ public static Object getFromSession(String key) { FacesContext ctx = getFacesContext(); Map sessionState = ctx.getExternalContext().getSessionMap(); return sessionState.get(key); } public static String getFromHeader(String key) { FacesContext ctx = getFacesContext(); ExternalContext ectx = ctx.getExternalContext(); return ectx.getRequestHeaderMap().get(key); } /** * Convenience method for getting Request variables. * @param key object key * @return session object for key */ public static Object getFromRequest(String key) { FacesContext ctx = getFacesContext(); Map sessionState = ctx.getExternalContext().getRequestMap(); return sessionState.get(key); } /** * Pulls a String resource from the property bundle that * is defined under the application <message-bundle> element in * the faces config. Respects Locale * @param key string message key * @return Resource value or placeholder error String */ public static String getStringFromBundle(String key) { ResourceBundle bundle = getBundle(); return getStringSafely(bundle, key, null); } /** * Convenience method to construct a FacesMesssage * from a defined error key and severity * This assumes that the error keys follow the convention of * using _detail for the detailed part of the * message, otherwise the main message is returned for the * detail as well. * @param key for the error message in the resource bundle * @param severity severity of message * @return Faces Message object */ public static FacesMessage getMessageFromBundle(String key, FacesMessage.Severity severity) { ResourceBundle bundle = getBundle(); String summary = getStringSafely(bundle, key, null); String detail = getStringSafely(bundle, key + "_detail", summary); FacesMessage message = new FacesMessage(summary, detail); message.setSeverity(severity); return message; } /** * Add JSF info message. * @param msg info message string */ public static void addFacesInformationMessage(String msg) { FacesContext ctx = getFacesContext(); FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_INFO, msg, ""); ctx.addMessage(getRootViewComponentId(), fm); } /** * Add JSF error message. * @param msg error message string */ public static void addFacesErrorMessage(String msg) { FacesContext ctx = getFacesContext(); FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, ""); ctx.addMessage(getRootViewComponentId(), fm); } /** * Add JSF error message for a specific attribute. * @param attrName name of attribute * @param msg error message string */ public static void addFacesErrorMessage(String attrName, String msg) { FacesContext ctx = getFacesContext(); FacesMessage fm = new FacesMessage(FacesMessage.SEVERITY_ERROR, attrName, msg); ctx.addMessage(getRootViewComponentId(), fm); } // Informational getters /** * Get view id of the view root. * @return view id of the view root */ public static String getRootViewId() { return getFacesContext().getViewRoot().getViewId(); } /** * Get component id of the view root. * @return component id of the view root */ public static String getRootViewComponentId() { return getFacesContext().getViewRoot().getId(); } /** * Get FacesContext. * @return FacesContext */ public static FacesContext getFacesContext() { return FacesContext.getCurrentInstance(); } /* * Internal method to pull out the correct local * message bundle */ private static ResourceBundle getBundle() { FacesContext ctx = getFacesContext(); UIViewRoot uiRoot = ctx.getViewRoot(); Locale locale = uiRoot.getLocale(); ClassLoader ldr = Thread.currentThread().getContextClassLoader(); return ResourceBundle.getBundle(ctx.getApplication().getMessageBundle(), locale, ldr); } /** * Get an HTTP Request attribute. * @param name attribute name * @return attribute value */ public static Object getRequestAttribute(String name) { return getFacesContext().getExternalContext().getRequestMap().get(name); } /** * Set an HTTP Request attribute. * @param name attribute name * @param value attribute value */ public static void setRequestAttribute(String name, Object value) { getFacesContext().getExternalContext().getRequestMap().put(name, value); } /* * Internal method to proxy for resource keys that don't exist */ private static String getStringSafely(ResourceBundle bundle, String key, String defaultValue) { String resource = null; try { resource = bundle.getString(key); } catch (MissingResourceException mrex) { if (defaultValue != null) { resource = defaultValue; } else { resource = NO_RESOURCE_FOUND + key; } } return resource; } /** * Locate an UIComponent in view root with its component id. Use a recursive way to achieve this. * @param id UIComponent id * @return UIComponent object */ public static UIComponent findComponentInRoot(String id) { UIComponent component = null; FacesContext facesContext = FacesContext.getCurrentInstance(); if (facesContext != null) { UIComponent root = facesContext.getViewRoot(); component = findComponent(root, id); } return component; } /** * Locate an UIComponent from its root component. * Taken from http://www.jroller.com/page/mert?entry=how_to_find_a_uicomponent * @param base root Component (parent) * @param id UIComponent id * @return UIComponent object */ public static UIComponent findComponent(UIComponent base, String id) { if (id.equals(base.getId())) return base; UIComponent children = null; UIComponent result = null; Iterator childrens = base.getFacetsAndChildren(); while (childrens.hasNext() && (result == null)) { children = (UIComponent)childrens.next(); if (id.equals(children.getId())) { result = children; break; } result = findComponent(children, id); if (result != null) { break; } } return result; } /** * Method to create a redirect URL. The assumption is that the JSF servlet mapping is * "faces", which is the default * * @param view the JSP or JSPX page to redirect to * @return a URL to redirect to */ public static String getPageURL(String view) { FacesContext facesContext = getFacesContext(); ExternalContext externalContext = facesContext.getExternalContext(); String url = ((HttpServletRequest)externalContext.getRequest()).getRequestURL().toString(); StringBuffer newUrlBuffer = new StringBuffer(); newUrlBuffer.append(url.substring(0, url.lastIndexOf("faces/"))); newUrlBuffer.append("faces"); String targetPageUrl = view.startsWith("/") ? view : "/" + view; newUrlBuffer.append(targetPageUrl); return newUrlBuffer.toString(); } // Get the error String error = iterBind.getError().getMessage(); // Get a session bean FacesContext ctx = FacesContext.getCurrentInstance(); ExpressionFactory ef = ctx.getApplication().getExpressionFactory(); ValueExpression ve = ef.createValueExpression(ctx.getELContext(), "#{testSessionBean}", TestSession.class); TestSession test = (TestSession)ve.getValue(ctx.getELContext()); // main jsf page DCBindingContainer dc = (DCBindingContainer)BindingContext.getCurrent().getCurrentBindingsEntry(); // taskflow binding DCTaskFlowBinding tf = (DCTaskFlowBinding)dc.findExecutableBinding("dynamicRegion1"); // pagedef of a page fragment JUFormBinding form = (JUFormBinding) tf.findExecutableBinding("regions_employee_regionPageDef"); // handle to binding container of the region. DCBindingContainer dcRegion = form; // return a methodexpression like a control flow case action or ADF pagedef action private MethodExpression getMethodExpression(String name) { Class [] argtypes = new Class[1]; argtypes[0] = ActionEvent.class; FacesContext facesCtx = FacesContext.getCurrentInstance(); Application app = facesCtx.getApplication(); ExpressionFactory elFactory = app.getExpressionFactory(); ELContext elContext = facesCtx.getELContext(); return elFactory.createMethodExpression(elContext,name,null,argtypes); } // RichCommandMenuItem menuPage1 = new RichCommandMenuItem(); menuPage1.setId("page1"); menuPage1.setText("Page 1"); menuPage1.setActionExpression(getMethodExpression("page1")); RichCommandButton button = new RichCommandButton(); button.setValueExpression("disabled",getValueExpression("#{!bindings."+item+".enabled}")); button.setId(item); button.setText(item); MethodExpression me = getMethodExpression("#{bindings."+item+".execute}"); button.addActionListener(new MethodExpressionActionListener(me)); footer.getChildren().add(button); // get a value private ValueExpression getValueExpression(String name) { FacesContext facesCtx = FacesContext.getCurrentInstance(); Application app = facesCtx.getApplication(); ExpressionFactory elFactory = app.getExpressionFactory(); ELContext elContext = facesCtx.getELContext(); return elFactory.createValueExpression(elContext, name, Object.class); } // an example how to use this RichInputText input = new RichInputText(); input.setValueExpression("value",getValueExpression("#{bindings."+item+".inputValue}")); input.setValueExpression("label",getValueExpression("#{bindings."+item+".hints.label}")); input.setId(item); panelForm.getChildren().add(input); // find a jsf component private UIComponent getUIComponent(String name) { FacesContext facesCtx = FacesContext.getCurrentInstance(); return facesCtx.getViewRoot().findComponent(name) ; } // change the locale Locale newLocale = new Locale(this.language); FacesContext context = FacesContext.getCurrentInstance(); context.getViewRoot().setLocale(newLocale); }
Happy coding with Vinay in Techartifact.