visual basic 6.0 barcode generator The JavaServer Faces Framework in Java

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The JavaServer Faces Framework
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FacesMessage doneMessage = null; String outcome = null; if (added) { doneMessage = new FacesMessage("Successfully added new user"); outcome = "done faces-redirect=true&includeViewParams=true"; } else { doneMessage = new FacesMessage("Failed to add new user"); outcome = "register faces-redirect=true&includeViewParams=true"; } FacesContextgetCurrentInstance()addMessage(null, doneMessage); return outcome; } }
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The only changes to this code are to make the bean be request-scoped, for the same reason as in the flash example, and to add the query parameters to the implicit navigation string In this case the includeViewParams=true parameter is added, causing whatever view parameters are declared on the to-view-id page to be included in the navigation The confirmxhtml page follows:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 10 Transitional//EN" "http://wwww3org/TR/xhtml1/DTD/xhtml1-transitionaldtd"> <html xmlns="http://wwww3org/1999/xhtml" xmlns:h="http://javasuncom/jsf/html" xmlns:f="http://javasuncom/jsf/core"> <f:metadata> <f:viewParam name="fname" value="#{userBeanfirstName}" /> <f:viewParam name="lname" value="#{userBeanlastName}" /> <f:viewParam name="sex" value="#{userBeansex}" /> <f:viewParam name="dob" value="#{userBeandob}"> <f:convertDateTime pattern="MM-dd-yy" /> </f:viewParam> <f:viewParam name="email" value="#{userBeanemail}" /> <f:viewParam name="sLevel" value="#{userBeanserviceLevel}" /> </f:metadata> <h:head> <title>A Simple JavaServer Faces Registration Application</title> </h:head> <h:body> <h:form> <h2>JSF Registration App</h2> <h4>Registration Confirmation</h4> <table> <tr> <td>First Name:</td> <td> <h:outputText value="#{userBeanfirstName}" /> </td> </tr>
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6:
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The Navigation Model
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additional rows omitted, they are the same as in the original jsfreg </table>
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PARTIII PART PART
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<p><h:commandButton value="Edit" action="register faces-redirect=true&includeViewParams=true" /></p> </h:form> <h:form> <h:inputHidden value="#{userBeanfirstName}" /> <h:inputHidden value="#{userBeanlastName}"/> <h:inputHidden value="#{userBeansex}" /> <h:inputHidden value="#{userBeandob}"> <f:convertDateTime pattern="MM-dd-yy" /> </h:inputHidden> <h:inputHidden value="#{userBeanemail}" /> <h:inputHidden value="#{userBeanserviceLevel}" /> <p><h:commandButton value="Confirm" action="#{userBeanaddConfirmedUser}" /></p> </h:form> </h:body> </html>
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As in the registerxhtml page, we need the <f:metadata> section at the top of the page and the additional query parameters on the action string What is new here are the additional <h:form> element and <h:inputHidden> elements, and the fact that the Confirm button has been moved into this new form This is necessary because we need to carry the values forward that are passed to this page as view parameters to the next page as regular form submit parameters, but there are no regular input fields as there are on the registerxhtml page Therefore, we use hidden fields to carry the values forward Note also the continued necessity for the <f:convertDateTime> on the dob field Finally, here is the donexhtml page:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 10 Transitional//EN" "http://wwww3org/TR/xhtml1/DTD/xhtml1-transitionaldtd"> <html xmlns="http://wwww3org/1999/xhtml" xmlns:h="http://javasuncom/jsf/html" xmlns:f="http://javasuncom/jsf/core"> <f:metadata> <f:viewParam name="fname" value="#{userBeanfirstName}" /> <f:viewParam name="lname" value="#{userBeanlastName}" /> <f:viewParam name="sex" value="#{userBeansex}" /> <f:viewParam name="dob" value="#{userBeandob}"> <f:convertDateTime pattern="MM-dd-yy" /> </f:viewParam> <f:viewParam name="email" value="#{userBeanemail}" /> <f:viewParam name="sLevel" value="#{userBeanserviceLevel}" /> </f:metadata>
Part I:
The JavaServer Faces Framework
<h:head> <title>A Simple JavaServer Faces Registration Application</title> </h:head> <h:body> <h:form> <h2>JSF Registration App</h2> <h4>Registration Confirmation</h4> <h:messages /> <table> <tr> <td>First Name:</td> <td> <h:outputText value="#{userBeanfirstName}" /> </td> </tr> additional rows omitted </table> </h:form> </h:body> </html>
The only difference between this donexhtml and the one in 2 is the now familiar <f:metadata> section
XML Configuration for View Parameters
Of course, implicit navigation is not the only way to declare view parameters It is also possible to include them in the XML navigation rules The general form for this follows
<navigation-rule> <from-view-id>whatever the from view id is</from-view-id> <navigation-case> <from-outcome>whatever the outcome value is</from-outcome> <to-view-id>whatever the to view id is</to-view-id> <redirect> the view-param elements are optional <view-param> <name>any string is fine here</name> <value>any string or value expression is fine here</value> </view-param> additional view-param elements may be defined </redirect> </navigation-case> </navigation-rule>
The <view-param> elements, if present, are added to whatever query parameters are present on the action query string The benefit of declaring them in the XML file is the ability to use EL expressions, which is not possible when including parameters in the action query string
6:
The Navigation Model
Bookmarkability and View Parameters
The View Parameters feature has another benefit: it enables the design of components that support bookmarkability When a user directs a browser to load a page from a bookmark, the browser issues an HTTP GET request to whatever URL was in the URL bar when the bookmark was saved Any POST data, or data that may have been in form fields in the page, is not saved as part of the bookmark JSF includes two components, mentioned previously in this chapter, that support bookmarkability: <h:button> and <h:link> The online code for this chapter includes an example that takes the PRG via View Parameters enabled jsfreg application and adds a bookmarkable link to the confirmxhtml page For brevity, this looks like
<h:link outcome="confirm faces-redirect=true&includeViewParams=true" value="boomarkable link to this page"/>
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