package cs320.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cs320.model.GuestBookEntry;
@WebServlet("/EditComment")
public class EditComment extends HttpServlet {
private static final long serialVersionUID = 1L;
public EditComment()
{
super();
}
/**
* Given an id, retrieve the GuestBookEntry.
*/
@SuppressWarnings("unchecked")
private GuestBookEntry getEntry( Integer id )
{
List<GuestBookEntry> entries = (List<GuestBookEntry>) getServletContext().getAttribute(
"entries" );
for( GuestBookEntry entry : entries )
if( entry.getId().equals( id ) ) return entry;
return null;
}
protected void doGet( HttpServletRequest request,
HttpServletResponse response ) throws ServletException, IOException
{
// get the entry to be edited
Integer id = Integer.valueOf( request.getParameter( "id" ) );
GuestBookEntry entry = getEntry( id );
// form display
response.setContentType( "text/html" );
PrintWriter out = response.getWriter();
out.println( "<html><head><title>Edit Comment</title></head><body>" );
out.println( "<form action='EditComment' method='post'>" );
out.println( "Name: <input type='text' name='name' value='"
+ entry.getName() + "' /> <br />" );
out.println( "<textarea name='message'>" + entry.getMessage()
+ "</textarea> <br />" );
// hidden form field
out.println( "<input type='hidden' name='id' value='" + id
+ "' /> <br />" );
out.println( "<input type='submit' name='save' value='Save' /><br />" );
out.println( "</form>" );
out.println( "</body></html>" );
}
protected void doPost( HttpServletRequest request,
HttpServletResponse response ) throws ServletException, IOException
{
// get the entry to be edited
Integer id = Integer.valueOf( request.getParameter( "id" ) );
GuestBookEntry entry = getEntry( id );
// change the entry based on user input
entry.setName( request.getParameter( "name" ) );
entry.setMessage( request.getParameter( "message" ) );
// send the user back to the guest book page
response.sendRedirect( "GuestBook" );
}
}