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.validation; 018 019import java.util.Map; 020 021/** 022 * Interface representing a message source that stores messages by key and can perform variable 023 * substitution. 024 * 025 * @author Igor Vaynberg (ivaynberg) 026 * @since 1.2.6 027 */ 028public interface IErrorMessageSource 029{ 030 /** 031 * Retrieves a message with the given <code>key</code>. 032 * 033 * @param key 034 * a message key 035 * @param vars 036 * variables to substitute 037 * @return message or null if not found 038 */ 039 String getMessage(String key, Map<String, Object> vars); 040}