Spring Forms - How to Check for Error on Specific Path

Question

I'm using the Spring Form library to handle a search page in my application. Here is a snipped from my DD showing the bean configuration:

<bean name="/search.html" class="myapp.web.AccountSearchController">
        <property name="sessionForm" value="true"/>
        <property name="commandName" value="searchAccounts"/>
        <property name="commandClass" value="myapp.service.AccountSearch"/>
        <property name="validator">
            <bean class="myapp.service.AccountSearchValidator"/>
        </property>
        <property name="formView" value="accountSearch"/>
        <property name="successView" value="accountSearch"/>
    </bean>

The validator class is quite simple:

package myapp.service;

import org.springframework.validation.Validator;
import org.springframework.validation.Errors;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class AccountSearchValidator implements Validator {

    /** Logger for this class and subclasses */
    protected final Log logger = LogFactory.getLog(getClass());

    public boolean supports(Class clazz) {
        return AccountSearch.class.equals(clazz);
    }

    public void validate(Object obj, Errors errors) {
        AccountSearch accountSearch = (AccountSearch) obj;
        if (accountSearch == null) {
            errors.rejectValue("domainName", "error.accountSearch.neither-specified", null, "Value required.");
        } else if (accountSearch.getAccountId().isEmpty() && 
                   accountSearch.getDomainName().isEmpty() ) {
            errors.rejectValue("domainName", "error.accountSearch.neither-specified", null, "Value required.");
        }
    }
}

In my JSP, my form is displayed in an HTML table. I want field specific errors to be displayed under the respective field as a separate table row. Here's a snippet:

            <tr>
                <td align="right" valign="top"><form:label path="domainName">Domain Name</form:label>:</td>
                <td><form:input path="domainName" size="30"/></td>
            </tr>
            <tr>
                 <td>&nbsp;</td>
                 <td><form:errors path="domainName" cssClass="error"/></td>
            </tr>

The question I have is - how can I make the output of the error row conditional on the existence of the error? Is the Validator instance accessible from my JSP? What would the test be for a c:if tag?

Thanks,

-aj

Answer 1

OK it took me a few days but I figured it out:

    <c:set var="domainNameErrors"><form:errors path="domainName"/></c:set>
    <c:if test="${not empty domainNameErrors}">
        <tr>
             <td>&nbsp;</td>
             <td>${domainNameErrors}</td>
        </tr>
    </c:if>

This article was very helpful: http://forum.springsource.org/archive/index.php/t-51044.html

Answer 2

Use <spring:hasBindErrors name="loginPasswordForm">

Answer 3

Use <spring:bind path="fieldName"> and check status.error to see if the field has error

Example

<spring:bind path="phoneNumber">
     <form:input path="phoneNumber" />
     <form:errors path="phoneNumber" cssClass="error" />
     ${status.error ? 'has error' : ''}
</spring:bind>

Note

<form:input path="" /> must be inside <spring:bind > tag