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.ajax; 018 019import java.util.Optional; 020import org.apache.wicket.core.request.handler.IPartialPageRequestHandler; 021import org.apache.wicket.request.cycle.RequestCycle; 022import org.danekja.java.util.function.serializable.SerializableConsumer; 023 024/** 025 * Some AJAX related utility functions. 026 */ 027public class AjaxUtils 028{ 029 030 /** 031 * Runs action if current request is of type "AJAX". Otherwise, nothing is done. 032 * 033 * @param ajaxAction 034 * The action to run a {@link SerializableConsumer} 035 */ 036 public static void executeIfAjax(SerializableConsumer<AjaxRequestTarget> ajaxAction) 037 { 038 Optional<AjaxRequestTarget> target = RequestCycle.get().find(AjaxRequestTarget.class); 039 target.ifPresent(ajaxAction); 040 } 041 042 043 /** 044 * Runs action if current request is of type "AJAX" or a Websockets request. Otherwise, nothing is done. 045 * 046 * @param ajaxAction 047 * The action to run a {@link SerializableConsumer} 048 */ 049 public static void executeIfAjaxOrWebSockets(SerializableConsumer<IPartialPageRequestHandler> ajaxAction) 050 { 051 Optional<IPartialPageRequestHandler> target = RequestCycle.get().find(IPartialPageRequestHandler.class); 052 target.ifPresent(ajaxAction); 053 } 054 055}