Hello,

I'm implementing a simple guess-the-number game in Seam to learn about validators.  I have a validator that checks to see if the user's guessed number falls in a min/max range, and that works.  If they enter non-integer junk in the input field I have provided what I hoped would be an exception to handle that with a message of my choosing.  Instead something is catching this problem before my validation and supplying some default error message that I don't want.

Here's my JSF code snippet:

          <h:form id="numberForm">
               <s:decorate>
                    <h:inputText type="text" id="userGuess" value="#{number.guess}" validator="#{number.validate}">
                    </h:inputText>
                    <s:message/>
               </s:decorate>
               <br/>
               <h:commandButton value="Submit"/>
          </h:form>

And here's code for my bean class that's also doing double duty as my validator.

package com.mydomain.seamdemo;

import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;
import org.jboss.seam.ScopeType;
import org.jboss.seam.annotations.faces.Validator;
import java.util.Random;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.ValidatorException;

@Name("number")
@Scope(ScopeType.SESSION)
@Validator
public class NumberBean implements Number, javax.faces.validator.Validator {
     protected final static Random rand = new Random();
     
     protected int min;
     protected int max;
     protected int guess;
     protected int actual;
     protected int count;
     
     public NumberBean() {
          this.min = 1;
          this.max = 10;
          this.count = 0;
     }
     
     public void validate(FacesContext context, UIComponent component, Object value) throws ValidatorException {
          try {
               System.out.println("Entered: " + value.toString());
               int param = Integer.parseInt(value.toString());
               if( param > this.max || param < this.min ) {
                    this.count--;
                    FacesMessage msg = new FacesMessage("Guess must be between "+this.min+" and "+this.max);
                    throw new ValidatorException(msg);
               }
          } catch(NumberFormatException e) {
               this.count--;
               FacesMessage msg = new FacesMessage("Must be a number");
               throw new ValidatorException(msg);
          }
     }
     
     public synchronized int getActual() {
          if(this.actual==0) {
               this.actual = rand.nextInt(this.max-this.min);
               this.actual += this.min;
          }
          return this.actual;
     }
     
     public String getMessage() {
          this.count++;
          if( this.count == 1 )
               return "Good luck!";
          if(this.guess == this.getActual()) {
               return "Sweet, you got it right!";
          } else if( this.guess < this.getActual()) {
               return "Sorry, try something higher";
          } else {
               return "Too bad, go lower";
          }
     }
     
     public int getMin() {return this.min;}
     public int getMax() {return this.max;}
     public int getGuess() {return this.guess;}
     
     public void setMin(int min) {this.min = min;}
     public void setMax(int max) {this.max = max;}
     public void setGuess(int guess) {this.guess = guess;} 
     
     public void destroy() {}
}

You can see my attempt to catch NumberFormatException in my validate method but validate() never gets called if non-integer value is entered.  Why?  Or better--what can I do about it so I can get my desired message shown?

The message I get on my rendered page when I enter non-integer values is this:

value must be an integer number between -2147483648 and 2147483647