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/*
 *  Copyright 2008-2010 biaoping.yin
 *
 *  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.frameworkset.http;

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

import org.frameworkset.util.Assert;
import org.frameworkset.util.annotations.HttpMethod;

/**
 * Title: ServletServerHttpRequest.java 
 * Description: 
 * bboss workgroup
 * Copyright (c) 2008
 * @Date 2010-11-21
 * @author biaoping.yin
 * @version 1.0
 */
public class ServletServerHttpRequest  implements ServerHttpRequest {

	private final HttpServletRequest servletRequest;

	private HttpHeaders headers;


	/**
	 * Construct a new instance of the ServletServerHttpRequest based on the given {@link HttpServletRequest}
	 * @param servletRequest the HttpServletRequest
	 */
	public ServletServerHttpRequest(HttpServletRequest servletRequest) {
		Assert.notNull(servletRequest, "'servletRequest' must not be null");
		this.servletRequest = servletRequest;
	}


	public HttpMethod getMethod() {
		return HttpMethod.valueOf(this.servletRequest.getMethod());
	}

	public URI getURI() {
		try {
			return new URI(servletRequest.getScheme(), null, servletRequest.getServerName(),
					servletRequest.getServerPort(), servletRequest.getRequestURI(),
					servletRequest.getQueryString(), null);
		}
		catch (URISyntaxException ex) {
			throw new IllegalStateException("Could not get HttpServletRequest URI: " + ex.getMessage(), ex);
		}
	}

	public HttpHeaders getHeaders() {
		if (this.headers == null) {
			this.headers = new HttpHeaders();
			for (Enumeration headerNames = this.servletRequest.getHeaderNames(); headerNames.hasMoreElements();) {
				String headerName = (String) headerNames.nextElement();
				for (Enumeration headerValues = this.servletRequest.getHeaders(headerName); headerValues.hasMoreElements();) {
					String headerValue = (String) headerValues.nextElement();
					this.headers.add(headerName, headerValue);
				}
			}
		}
		return this.headers;
	}

	public InputStream getBody() throws IOException {
		return this.servletRequest.getInputStream();
	}


	
	public HttpServletRequest getServletRequest()
	{
	
		return servletRequest;
	}

}