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.markup.resolver; 018 019import org.apache.wicket.Component; 020import org.apache.wicket.MarkupContainer; 021import org.apache.wicket.markup.ComponentTag; 022import org.apache.wicket.markup.MarkupStream; 023import org.apache.wicket.settings.PageSettings; 024import org.apache.wicket.util.io.IClusterable; 025 026/** 027 * IComponentResolvers are responsible for mapping component names to Wicket components. Resolvers 028 * are first looked up in a component's hierarchy before falling back to a list of 029 * IComponentResolvers maintained in {@link PageSettings}. 030 * 031 * NOTE: implementations for this interface must be thread-safe! 032 * 033 * @see ComponentResolvers 034 * 035 * @author Juergen Donnerstag 036 */ 037public interface IComponentResolver extends IClusterable 038{ 039 /** 040 * Try to resolve a component. 041 * 042 * @param container 043 * The container parsing its markup 044 * @param markupStream 045 * The current markupStream 046 * @param tag 047 * The current component tag while parsing the markup 048 * @return component or {@code null} if not found 049 */ 050 Component resolve(final MarkupContainer container, final MarkupStream markupStream, 051 final ComponentTag tag); 052}