ValidationStyleBehavior.java

/**
 * Copyright 2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.bricket.web.common;

import org.apache.wicket.Component;
import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.form.FormComponent;

/**
 * @author Ingo Renner
 * @author Henning Teek
 */
public class ValidationStyleBehavior extends AbstractBehavior {
    @Override
    public void onComponentTag(final Component component, final ComponentTag tag) {
        // Cast prüfen, das es bei Innerclasses und Labels sonst fehl schlägt.
        if (FormComponent.class.isAssignableFrom(component.getClass())) {
            assert (component instanceof FormComponent<?>);
            FormComponent<?> comp = (FormComponent<?>) component;
            if (comp.isValid() && comp.getConvertedInput() != null) {
                tag.getAttributes().put("class", "valid");
            } else if (!comp.isValid()) {
                tag.getAttributes().put("class", "invalid");
            }
        }
    }
}