/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.wicket.application;

import org.apache.wicket.Component;
import org.apache.wicket.markup.ComponentTag;

/**
 * Listener interface that receives messages when components render their tags. Useful for cross-cutting concerns that
 * want to output tag attribute or otherwise modify component tags.
 *
 * @author Igor Vaynberg (ivaynberg)
 */
@FunctionalInterface
public interface IOnComponentTagListener {
	/**
	 * Called before Component#onComponentTag(ComponentTag)
	 *
	 * @param component
	 * 	the component whose tag is being modified
	 * @param tag
	 * 	the component tag being modified
	 */
	void onComponentTag(Component component, ComponentTag tag);
}
