001/*
002 * Copyright 2002-2011 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.http.client.support;
018
019import java.util.ArrayList;
020import java.util.List;
021
022import org.springframework.http.client.ClientHttpRequestFactory;
023import org.springframework.http.client.ClientHttpRequestInterceptor;
024import org.springframework.http.client.InterceptingClientHttpRequestFactory;
025import org.springframework.util.CollectionUtils;
026
027/**
028 * Base class for {@link org.springframework.web.client.RestTemplate} and other HTTP accessing gateway helpers, adding
029 * interceptor-related properties to {@link HttpAccessor}'s common properties.
030 *
031 * <p>Not intended to be used directly. See {@link org.springframework.web.client.RestTemplate}.
032 *
033 * @author Arjen Poutsma
034 */
035public abstract class InterceptingHttpAccessor extends HttpAccessor {
036
037        private List<ClientHttpRequestInterceptor> interceptors = new ArrayList<ClientHttpRequestInterceptor>();
038
039        /**
040         * Sets the request interceptors that this accessor should use.
041         */
042        public void setInterceptors(List<ClientHttpRequestInterceptor> interceptors) {
043                this.interceptors = interceptors;
044        }
045
046        /**
047         * Return the request interceptor that this accessor uses.
048         */
049        public List<ClientHttpRequestInterceptor> getInterceptors() {
050                return interceptors;
051        }
052
053        @Override
054        public ClientHttpRequestFactory getRequestFactory() {
055                ClientHttpRequestFactory delegate = super.getRequestFactory();
056                if (!CollectionUtils.isEmpty(getInterceptors())) {
057                        return new InterceptingClientHttpRequestFactory(delegate, getInterceptors());
058                }
059                else {
060                        return delegate;
061                }
062        }
063
064}