org.mentawai.rule
Class RequiredFieldRule

java.lang.Object
  extended by org.mentawai.rule.RequiredFieldRule
All Implemented Interfaces:
Rule

public class RequiredFieldRule
extends Object
implements Rule

A validation rule for required fields. This rule check if the action input value is present, in other words, not null. It also check if the value is a non-empty String.

Author:
Sergio Oliveira

Constructor Summary
RequiredFieldRule()
           
 
Method Summary
 boolean check(String field, Action action)
          Check and validate the given field from the give action.
static RequiredFieldRule getInstance()
           
 Map<String,String> getTokens()
          Returns a map with tokens that can be used in the error messages.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

RequiredFieldRule

public RequiredFieldRule()
Method Detail

getInstance

public static RequiredFieldRule getInstance()

check

public boolean check(String field,
                     Action action)
Description copied from interface: Rule
Check and validate the given field from the give action.

Specified by:
check in interface Rule
Parameters:
field - The field to validate.
action - The action from where to get the field.
Returns:
true if the validation succeeds.

getTokens

public Map<String,String> getTokens()
Description copied from interface: Rule
Returns a map with tokens that can be used in the error messages. The tokens in the error messages will be replaced by the token values in this map.

Specified by:
getTokens in interface Rule
Returns:
A map with the token values.


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