RestTemplateWithHeaders.java

/*
 * Copyright 2011 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.social.lastfm.connect;

import java.io.IOException;
import java.net.URI;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.web.client.RequestCallback;
import org.springframework.web.client.ResponseExtractor;
import org.springframework.web.client.RestClientException;
import org.springframework.web.client.RestTemplate;

public class RestTemplateWithHeaders extends RestTemplate {

	private HttpHeaders headers;

	public HttpHeaders getRequestHttpHeaders() {
		return headers;
	}

	public RestTemplateWithHeaders(ClientHttpRequestFactory requestFactory,
			HttpHeaders headers) {
		super(requestFactory);
		this.headers = headers;
	}

	@Override
	protected <T> T doExecute(URI url, HttpMethod method,
			RequestCallback requestCallback,
			ResponseExtractor<T> responseExtractor) throws RestClientException {

		RequestCallbackDecorator requestCallbackDecorator = new RequestCallbackDecorator(
				requestCallback);

		return super.doExecute(url, method, requestCallbackDecorator,
				responseExtractor);

	}

	private class RequestCallbackDecorator implements RequestCallback {

		public RequestCallbackDecorator(RequestCallback targetRequestCallback) {
			this.targetRequestCallback = targetRequestCallback;
		}

		private RequestCallback targetRequestCallback;

		@Override
		public void doWithRequest(ClientHttpRequest request) throws IOException {
			request.getHeaders().putAll(headers);

			if (null != targetRequestCallback) {
				targetRequestCallback.doWithRequest(request);
			}
		}
	}
}