001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.wicket.application; 018 019import org.apache.wicket.Component; 020import org.apache.wicket.markup.ComponentTag; 021 022/** 023 * Listener interface that receives messages when components render their tags. Useful for cross-cutting concerns that 024 * want to output tag attribute or otherwise modify component tags. 025 * 026 * @author Igor Vaynberg (ivaynberg) 027 */ 028@FunctionalInterface 029public interface IOnComponentTagListener { 030 /** 031 * Called before Component#onComponentTag(ComponentTag) 032 * 033 * @param component 034 * the component whose tag is being modified 035 * @param tag 036 * the component tag being modified 037 */ 038 void onComponentTag(Component component, ComponentTag tag); 039}