ViewScopedComponentBindingBean.java

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package com.sun.faces.component;

import java.util.Map;
import javax.faces.application.Application;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import javax.faces.component.UICommand;
import javax.faces.context.FacesContext;

@ManagedBean(name="viewScopedBean")
@ViewScoped
public class ViewScopedComponentBindingBean {
    
    private static final String REQUEST_KEY = "com.sun.faces.component.ViewScopedComponentBindingBeanKey";
    
    
    public ViewScopedComponentBindingBean() {
        Map<String, Object> requestMap = FacesContext.getCurrentInstance().getExternalContext().getRequestMap();
        StringBuilder sb = (StringBuilder) requestMap.get(REQUEST_KEY);
        if (null == sb) {
            sb = new StringBuilder();
            requestMap.put(REQUEST_KEY, sb);
        }
        sb.append(" ctor called ");
        
    }
    
    public String getCtorMessage() {
        String result = "";
        
        Map<String, Object> requestMap = FacesContext.getCurrentInstance().getExternalContext().getRequestMap();
        StringBuilder sb = (StringBuilder) requestMap.get(REQUEST_KEY);
        if (null != sb) {
            result = sb.toString();
        }
        
        return result;

    }

    private UICommand button = null;

    public void setCommandButton(UICommand button) {
        this.button = button;
    }

    public UICommand getCommandButton () {
        if (null == button) {
            FacesContext context = FacesContext.getCurrentInstance();
            Application app = context.getApplication();
            button = (UICommand) app.createComponent(context, "javax.faces.Command", "javax.faces.Button");
        }
        return button;
    }
}