package com.nanometer.smartlab.util;
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import org.primefaces.context.RequestContext;
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import org.primefaces.expression.SearchExpressionFacade;
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import javax.faces.application.FacesMessage;
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import javax.faces.component.UIComponent;
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import javax.faces.component.UIViewRoot;
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import javax.faces.context.FacesContext;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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/**
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* JSF的一些方法封装
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*/
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public class FacesUtils {
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public static void info(String message) {
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info("", message);
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}
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public static void warn(String message) {
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warn("", message);
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}
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public static void error(String message) {
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error("", message);
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}
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public static void fatal(String message) {
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fatal("", message);
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}
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public static void info(String title, String message) {
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addMessage(FacesMessage.SEVERITY_INFO, title, message);
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}
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public static void warn(String title, String message) {
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addMessage(FacesMessage.SEVERITY_WARN, title, message);
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}
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public static void error(String title, String message) {
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addMessage(FacesMessage.SEVERITY_ERROR, title, message);
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}
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public static void fatal(String title, String message) {
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addMessage(FacesMessage.SEVERITY_FATAL, title, message);
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}
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public static void addMessage(FacesMessage.Severity severity, String title, String message) {
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FacesContext.getCurrentInstance().addMessage(null,
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new FacesMessage(severity, title, message));
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}
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/**
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* 页面转到别的URL
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*
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* @param url 新的URL
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* @throws IOException
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*/
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public static void redirect(String url) throws IOException {
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FacesContext.getCurrentInstance().getExternalContext().redirect(url);
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}
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public static <T> T getBean(String beanName) {
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FacesContext context = FacesContext.getCurrentInstance();
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return (T) context.getApplication().evaluateExpressionGet(context, "#{" + beanName + "}", Object.class);
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}
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/**
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* 运行js语句
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*
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* @param js js代码语句
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* @throws Exception
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*/
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public static void js(String js) {
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RequestContext context = RequestContext.getCurrentInstance();
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context.execute(js);
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}
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public static HttpServletRequest getHttpServletRequest() {
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HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();
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return request;
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}
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public static String getHttpRequestParameter(String name) {
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return getHttpServletRequest().getParameter(name);
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}
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public static void ok() {
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info("操作成功");
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}
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/**
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* set cookie value
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*
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* @param name key of cookie
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* @param value value of cookie
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* @param expiry an integer specifying the maximum age of the
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* cookie in seconds; if negative, means
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* the cookie is not stored; if zero, deletes
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* the cookie
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*/
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public static void setCookie(String name, String value, int expiry) {
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FacesContext facesContext = FacesContext.getCurrentInstance();
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HttpServletRequest request = (HttpServletRequest) facesContext.getExternalContext().getRequest();
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Cookie cookie = null;
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Cookie[] cookies = request.getCookies();
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if (cookies != null && cookies.length > 0) {
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for (int i = 0; i < cookies.length; i++) {
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if (cookies[i].getName().equals(name)) {
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cookie = cookies[i];
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break;
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}
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}
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}
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if (cookie != null) {
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cookie.setValue(value);
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} else {
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cookie = new Cookie(name, value);
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cookie.setPath(request.getContextPath());
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}
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cookie.setMaxAge(expiry);
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HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext().getResponse();
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response.addCookie(cookie);
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}
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/**
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* get cookie value
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*
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* @param name key of the cookie
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* @return value of the cookie
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*/
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public static String getCookie(String name) {
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FacesContext facesContext = FacesContext.getCurrentInstance();
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HttpServletRequest request = (HttpServletRequest) facesContext.getExternalContext().getRequest();
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Cookie[] cookies = request.getCookies();
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if (cookies != null && cookies.length > 0) {
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for (int i = 0; i < cookies.length; i++) {
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if (cookies[i].getName().equals(name)) {
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return cookies[i].getValue();
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}
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}
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}
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return null;
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}
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/**
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* This method returns any UI component whose id is passed.
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*
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* @param clientId the id of the component
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* @return the UIComponent
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*/
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public static UIComponent getUIComponent(String clientId) {
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FacesContext facesContext = FacesContext.getCurrentInstance();
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if (facesContext != null) {
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UIViewRoot viewRoot = facesContext.getViewRoot();
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if (viewRoot != null) {
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return viewRoot.findComponent(clientId);
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}
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}
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return null;
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}
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/**
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* 根据某个基准组件和相对这个组件的表达式，得到对应的组件
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*
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* @param mySourceComponent 基准组件
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* @param expression 表达式
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* @return 对应的组件
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*/
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public static UIComponent getComponentFromRelative(UIComponent mySourceComponent, String expression) {
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FacesContext context = FacesContext.getCurrentInstance();
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return SearchExpressionFacade.resolveComponent(context, mySourceComponent, expression);
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}
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/**
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* 根据某个基准组件和相对这个组件的表达式，得到对应的组件
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*
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* @param clientId 基准组件ClientID
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* @param expression 表达式
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* @return 对应的组件
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*/
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public static UIComponent getComponentFromRelative(String clientId, String expression) {
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UIComponent mySourceComponent = getUIComponent(clientId);
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if (mySourceComponent == null) return null;
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else return getComponentFromRelative(mySourceComponent, expression);
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}
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/**
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* 根据某个基准组件和相对这个组件的表达式，得到对应的组件绝对路径ID
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*
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* @param mySourceComponent 基准组件
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* @param expression 表达式
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* @return 对应的组件ID
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*/
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public static String getComponentIDFromRelative(UIComponent mySourceComponent, String expression) {
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UIComponent componentToUpdate = getComponentFromRelative(mySourceComponent, expression);
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if (componentToUpdate == null) return null;
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else return componentToUpdate.getClientId();
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}
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/**
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* 根据某个基准组件和相对这个组件的表达式，得到对应的组件绝对路径ID
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*
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* @param mySourceComponentID 基准组件ClientID
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* @param expression 表达式
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* @return 对应的组件ID
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*/
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public static String getComponentIDFromRelative(String mySourceComponentID, String expression) {
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UIComponent componentToUpdate = getComponentFromRelative(mySourceComponentID, expression);
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if (componentToUpdate == null) return null;
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else return componentToUpdate.getClientId();
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}
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}
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