client/src/main/java/org/apache/hupa/client/validation/NotEmptyValidator.java

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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
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package org.apache.hupa.client.validation;


import com.google.gwt.user.client.ui.HasText;

import eu.maydu.gwt.validation.client.ValidationAction;
import eu.maydu.gwt.validation.client.ValidationResult;
import eu.maydu.gwt.validation.client.Validator;
import eu.maydu.gwt.validation.client.i18n.ValidationMessages;

/**
 * Validator which checks if the HasText implementation is empty or not
 *
 *
 */
public class NotEmptyValidator extends Validator<NotEmptyValidator> {
    private HasText text;

    public NotEmptyValidator(HasText text) {
        this.text = text;
    }
    @Override
    public void invokeActions(ValidationResult result) {
        for (ValidationAction<HasText> action : getFailureActions())
            action.invoke(result, text);
    }

    @Override
    public <V extends ValidationMessages> ValidationResult validate(
            V messages) {
        if (text.getText().trim().length() < 1) {
            return new ValidationResult();
        }
        return null;
    }

}