ServletHttpRequest.java

package org.sothis.mvc.http.servlet;

import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.sothis.mvc.ActionContext;
import org.sothis.mvc.Attachments;
import org.sothis.mvc.Attributes;
import org.sothis.mvc.HashMapParameters;
import org.sothis.mvc.Headers;
import org.sothis.mvc.Parameters;
import org.sothis.mvc.Request;
import org.sothis.mvc.Session;

public class ServletHttpRequest implements Request {

	private final HttpServletRequest request;
	private Parameters parameters;
	private Headers headers;
	private Attachments attachments;
	private Session session;
	private Attributes attributes;
	private String uri;

	public ServletHttpRequest(HttpServletRequest request) {
		super();
		this.request = request;
	}

	@Override
	public String getCharset() {
		return request.getCharacterEncoding();
	}

	@Override
	public void setCharset(String charset) throws UnsupportedEncodingException {
		request.setCharacterEncoding(charset);
	}

	@Override
	public Parameters parameters() {
		if (null == parameters) {
			parameters = new HashMapParameters(new HashMap<String, Object[]>(request.getParameterMap()));
		}
		return parameters;
	}

	@Override
	public InputStream getInputStream() throws IOException {
		return request.getInputStream();
	}

	@Override
	public Session getSession() {
		return getSession(true);
	}

	@Override
	public Session getSession(boolean create) {
		if (null == session) {
			HttpSession httpSession = request.getSession(create);
			if (null == httpSession) {
				return null;
			}
			session = new ServletSession(httpSession);
		}
		return session;
	}

	@Override
	public String getMethod() {
		return request.getMethod();
	}

	@Override
	public String getProtocol() {
		return request.getProtocol();
	}

	@Override
	public String getUri() {
		if (null == uri) {
			uri = request.getRequestURI();
			if (request.getQueryString() != null) {
				uri = uri + "?" + request.getQueryString();
			}
		}
		return uri;
	}

	@Override
	public Headers headers() {
		if (null == headers) {
			headers = new ServletRequestHttpHeaders(request);
		}
		return headers;
	}

	@Override
	public String getQueryString() {
		return request.getQueryString();
	}

	@Override
	public Attributes attributes() {
		if (null == attributes) {
			attributes = new ServletRequestAttributes(request);
		}
		return attributes;
	}

	@Override
	public String getUriPath() {
		return request.getRequestURI();
	}

	@Override
	public Attachments attachments() throws IOException {
		if (null == attachments) {
			try {
				String contentType = request.getContentType();
				if (null != contentType && contentType.toLowerCase().startsWith("multipart/")) {
					ServletContext servletContext = (ServletContext) ActionContext.getContext().getApplicationContext()
							.getNativeContext();
					if (servletContext.getMajorVersion() > 3
							|| (servletContext.getMajorVersion() == 3 && servletContext.getMinorVersion() >= 1)) {
						attachments = new Servlet31Attachments(request);
					} else {
						attachments = new CommonsUploadAttachments(request);
					}
				} else {
					attachments = ServletAttachments.EMPTY;
				}
			} catch (ServletException e) {
				attachments = ServletAttachments.EMPTY;
			}
		}
		return attachments;
	}

	@Override
	public String getLocalAddr() {
		return request.getLocalAddr();
	}

	@Override
	public int getLocalPort() {
		return request.getLocalPort();
	}

	@Override
	public String getRemoteAddr() {
		return request.getRemoteAddr();
	}

	@Override
	public int getRemotePort() {
		return request.getRemotePort();
	}

	@Override
	public String getScheme() {
		return request.getScheme();
	}

}