I'm sure this is something simple, but this is my first go around w/using
Converters within a Seam app.
-----
I simply want to convert a name field entered in the UI to 'Firstname
Lastname'. For instance, if a user enters 'Smart, Todd', I want to convert
that into 'Todd Smart'. I realize there are easy ways to do this within the
getter/setter for the name field ... this is an exercise to better understand
how to use JSF Converters in Seam -- I eventually want to 'ajaxify' these
converter sequences for more complex requirements.
So...I created FullName and FullNameConverter classes:
| package org.jboss.seam.example.hibernate;
|
| import java.io.Serializable;
|
| public class FullName implements Serializable {
|
| private String firstName;
| private String lastName;
|
| public FullName(String unparsedName) {
| unparsedName = unparsedName.trim();
| String[] splitName = unparsedName.split(" ");
| if(splitName.length == 2 && unparsedName.indexOf(",") == -1) {
| setFirstName(splitName[0]);
| setLastName(splitName[1]);
| } else if(splitName.length == 2) {
| setFirstName(splitName[1]);
| setLastName(splitName[0].replace(",", ""));
| }
| }
|
| public String getFirstName() {
| return firstName;
| }
|
| public void setFirstName(String firstName) {
| this.firstName = firstName;
| }
|
| public String getLastName() {
| return lastName;
| }
|
| public void setLastName(String lastName) {
| this.lastName = lastName;
| }
|
| public String toString() {
| return this.firstName + " " + this.lastName;
| }
| }
|
| package org.jboss.seam.example.hibernate;
|
| import java.io.Serializable;
|
| import javax.faces.component.UIComponent;
| import javax.faces.context.FacesContext;
| import javax.faces.convert.Converter;
| import javax.faces.convert.ConverterException;
|
| import org.jboss.seam.InterceptionType;
| import org.jboss.seam.ScopeType;
| import org.jboss.seam.annotations.Intercept;
| import org.jboss.seam.annotations.Name;
| import org.jboss.seam.annotations.Scope;
|
| @Scope(ScopeType.SESSION)
| @Name("fullNameConverter")
| @Intercept(InterceptionType.ALWAYS)
| public class FullNameConverter implements Serializable, Converter {
|
| public Object getAsObject(FacesContext arg0, UIComponent arg1, String
arg2)
| throws ConverterException {
|
| FullName fullName;
| fullName = new FullName(arg2);
|
| return fullName;
| }
|
| public String getAsString(FacesContext arg0, UIComponent arg1, Object
arg2)
| throws ConverterException {
| String returnString;
|
| FullName fullName;
| fullName = (FullName) arg2;
|
| returnString = (fullName==null ? null : fullName.toString());
|
| return returnString;
| }
|
| }
|
I'm using the AppUser class (from the Seam Hibernate3 Booking Example).
Specifically, it's name property:
| @NotNull
| @Length(max=100)
| public String getName()
| {
| return name;
| }
| public void setName(String name)
| {
| this.name = name;
| }
|
Finally, I've updated the register.xhtml from the same booking example to use
the FullNameConverter for the name field:
| <div class="entry">
| <div class="label"><h:outputLabel for="name">Name (first
last):</h:outputLabel></div>
| <div class="input">
| <h:inputText id="name" value="#{appUser.name}"
required="true" converter="#{fullNameConverter}" >
| </h:inputText>
| <br/>
| <span class="errors"><h:message for="name" /></span>
| </div>
| </div>
|
...............
When I run through the app (with my debugger attached), I find that ... when
the form is submitted ... the FullNameConverter.getAsObject() is called (which
does receive the inputted value). This is followed by a call to the
AppUser.getName() method. The result is that the getName does NOT have the
converted value. Of course, this is to be expected....as the
FullNameConverter.getAsString() would need to be called to return the converted
value.
Oddly enough, when the register.xhtml file is initially executed (before the
user has entered values), I show (debugger breakpoints) that
FullNameConverter.getAsString() is called, followed by a call to
AppUser.getName().
Anyway...I'm sure this is something simple -- or foolish :) -- that I'm doing
and/or assuming regarding using Converters within Seam. Please clue me in...
--
Regards,
Todd
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