Develop > Presentation layer > Management Center framework > Customize the Management Center user interface > Customizing an existing Management Center tool > Changing validation logic

Create a custom validator

Create a custom validation rule for use in the Management Center user interface. For example, you can add a rule to validate that there are no spaces in a value entered by the business user. In addition to creating a validation rule on the client-side, you also need to create the validation logic on the server-side.

Tip: This task file provides the generic steps for creating a custom validation rule. For a tutorial on this topic, refer to Tutorial: Adding a validation rule in the Marketing tool.

To add a custom validation rule to the Management Center user interface:


  1. Open WebSphere Commerce Developer and switch to the Enterprise Explorer view.

  2. In the Enterprise Explorer view, expand LOBTools > WebContent > WEB-INF > src > lzx > yourCompanyName > Management_Center_component > objectDefinitions, where Management_Center_component is the name of the tool to customize. You will need to create the folders if they do not exist.

  3. Create the new validation rule as a new OpenLaszlo library source file (name the file using this syntax: company_nameManagement_Center_componentValidator.lzx; for example, MyCompanyCatalogValidator.lzx):

    The following is an example of a validation rule, with the class name extNoSpacesValidator that extends wcfValidator. This validator verifies that the value specified by the business user does not contain spaces.

    <!-- This class validates that a property value does not contain spaces.
    <class name="extNoSpacesValidator" extends="wcfValidator">  
    <method name="validate" args="o, property">    
    <![CDATA[ if (property){
        if (property.value.indexOf(" ") >= 0) {
        property.addValidationError(this, "Enter a value with no spaces for the
    <b>" +
        property.propertyDefinition.displayName + "</b> field.");     }
        else {
        property.clearValidationError(this);     }

What to do next

  1. Once you have created the custom validation rule add it to an object definition. See Add a validation rule.

  2. Add a new library to the Management Center