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Struts 1.3 Validation Problem

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posted 12 years ago

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Hi Guyz,

I get the following error on browser when I try to open the login page of my application :

java.lang.NullPointerException: Depends string "required" was not found in validator-rules.xml

Kindly help.
Thanks,
Mark.

Pyla Rao

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Posts: 51

posted 12 years ago

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can you elaborate more or can you expose your source..??? Then i will surely help you..

Mark Butcher

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posted 12 years ago

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Sure, here is the code.

validation.xml :

<?xml version="1.0" encoding="ISO-8859-1" ?>

<!DOCTYPE form-validation PUBLIC
     "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.3.0//EN"
     "http://jakarta.apache.org/commons/dtds/validator_1_3_0.dtd">

<form-validation>

</global>

<form name="logonForm">
            <field
                property="username"
                depends="required">
                    <arg key="logonForm.username"/>
            </field>
            <field
                property="password"
                depends="required,mask">
                    <arg key="logonForm.password"/>
                    <var>
                        <var-name>mask</var-name>
                        <var-value>^[0-9a-zA-Z]*$</var-value>
                    </var>
            </field>
        </form>
        
	<form name="loginForm">
	
		<field property="uName" depends="required">
		
		<arg key="loginForm.uName"/>
		
		</field>
		
		<field property="pWord" depends="required,minlength">
        	<msg name="minlength" key=""/>
        	<arg0 key="loginForm.pWord"/>
        	<arg1 name="minlength" key="${var:minlength}" resource="false"/>
        	<var>
        	<var-name>minlength</var-name>
        	<var-value>3</var-value>
        	</var>
    	</field>

</form>

</formset>

</form-validation>

validator-rules.xml :

<!DOCTYPE form-validation PUBLIC
          "-//Apache Software Foundation//DTD Commons Validator Rules Configuration 1.1.3//EN"
          "http://jakarta.apache.org/commons/dtds/validator_1_1_3.dtd">

<form-validation>

<validator name="required"
            classname="org.apache.struts.validator.FieldChecks"
               method="validateRequired"
         methodParams="java.lang.Object,
                       org.apache.commons.validator.ValidatorAction,
                       org.apache.commons.validator.Field,
                       org.apache.struts.action.ActionMessages,
                       org.apache.commons.validator.Validator,
                       javax.servlet.http.HttpServletRequest"
                  msg="errors.required"/>
                  
        <validator name="allrequired"
            classname="org.apache.struts.validator.FieldChecks"
               method="validateRequired"
         methodParams="java.lang.Object,
                       org.apache.commons.validator.ValidatorAction,
                       org.apache.commons.validator.Field,
                       org.apache.struts.action.ActionMessages,
                       org.apache.commons.validator.Validator,
                       javax.servlet.http.HttpServletRequest"
                  msg="errors.all"/>
          
      <validator name="daterange"
            classname="org.apache.struts.validator.FieldChecks"
               method="validatedaterange"
         methodParams="java.lang.Object,
                       org.apache.commons.validator.ValidatorAction,
                       org.apache.commons.validator.Field,
                       org.apache.struts.action.ActionMessages,
                       org.apache.commons.validator.Validator,
                       javax.servlet.http.HttpServletRequest"
                  msg="errors.invalid">
                  <javascript><![CDATA[
                function validateName(form) {
                var isValid=true;
                var today=new Date();
                var year2000=new Date(2008,10,1);
                var diff=today-year2000;
                diff=Math.round(diff/1000/60/60/24);
                if(diff>60)
                {
                  isValid=true;
                }
                else
                {
                   isValid=false;
                 }
                 return isValid;
                }
                 ]]>
        </javascript>
        </validator>
                
      <validator name="requiredif"
                 classname="org.apache.struts.validator.FieldChecks"
                 method="validateRequiredIf"
                 methodParams="java.lang.Object,
                               org.apache.commons.validator.ValidatorAction,
                               org.apache.commons.validator.Field,
                               org.apache.struts.action.ActionMessages,
                               org.apache.commons.validator.Validator,
                               javax.servlet.http.HttpServletRequest"
                 msg="errors.required"/>

<validator name="includeJavaScriptUtilities"
            classname=""
               method=""
         methodParams=""
              depends=""
                  msg=""
           jsFunction="org.apache.commons.validator.javascript.validateUtilities"/>

</global>

</form-validation>

JSP :

struts-config :

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
          "http://struts.apache.org/dtds/struts-config_1_3.dtd">
    <struts-config>
    
        <form-beans>
            <form-bean name="loginForm" type="com.form.LoginForm"/>
        </form-beans>
        <action-mappings>
            <action path="/mainPath" 
            		type="com.action.MainAction" 
            		name="loginForm" 
            		input="/jsp/mainLogin.jsp" 
            		parameter="method"
            		validate="true">
 			<forward name="success" path="/jsp/Index.jsp"/>
 			<forward name="failure" path="/jsp/mainLogin.jsp"/>
		</action>
        </action-mappings>
        <message-resources parameter="resources.properties"/>
        
		
		<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
		<set-property property="pathnames" value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
		</plug-in>
 	    
 	</struts-config>

Eclipse error : The content of element type "field" must match "(msg|arg|var)*".

Login page error : java.lang.NullPointerException: Depends string "required" was not found in validator-rules.xml

Thanks
Mark

Shankar Tanikella

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Posts: 329

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posted 12 years ago

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Hi Mark,
Everything looks fine but for the validators "allrequired" and "required" are using the same method signature. Have you overwritten the validator code. In any case how come two different validators use same method from the same class using same attributes [non user defined] and perform different operations?

Looks like you have to remove "allrequired" validator from your validation-rules file if it is added by mistake.

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