com.interface21.web.bind
Class RequestUtils

java.lang.Object
  |
  +--com.interface21.web.bind.RequestUtils

public abstract class RequestUtils

extends java.lang.Object

Parameter extraction methods. This class supports an approach distinct from data binding, in which parameters of specific types are required. This is very useful for simple submissions.

Author:

Rod Johnson

Constructor Summary

RequestUtils()

Method Summary

static int	getIntParameter(javax.servlet.http.HttpServletRequest request, java.lang.String name, int defaultVal) Get an int parameter, with a fallback value.
static boolean	getRequiredBooleanParameter(javax.servlet.http.HttpServletRequest request, java.lang.String name) True is true or yes (no case) or 1
static double	getRequiredDoubleParameter(javax.servlet.http.HttpServletRequest request, java.lang.String name)
static int	getRequiredIntParameter(javax.servlet.http.HttpServletRequest request, java.lang.String name) Get an int parameter, throwing an exception if it isn't found or isn't a number
static void	rejectRequestMethod(javax.servlet.http.HttpServletRequest request, java.lang.String method) Throw a ServletException if the given HTTP request method should be rejected

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RequestUtils

public RequestUtils()

Method Detail

rejectRequestMethod

public static void rejectRequestMethod(javax.servlet.http.HttpServletRequest request,
                                       java.lang.String method)
                                throws javax.servlet.ServletException

Throw a ServletException if the given HTTP request method should be rejected

Parameters:

request - request to check

method - method, such as "GET", which should be rejected

method - to reject

getRequiredIntParameter

public static int getRequiredIntParameter(javax.servlet.http.HttpServletRequest request,
                                          java.lang.String name)
                                   throws ServletRequestBindingException

Get an int parameter, throwing an exception if it isn't found or isn't a number

Throws:

ServletRequestBindingException: - subclass of ServletException, so it doesn't need to be caught

getIntParameter

public static int getIntParameter(javax.servlet.http.HttpServletRequest request,
                                  java.lang.String name,
                                  int defaultVal)

Get an int parameter, with a fallback value. Never throws an exception. Can pass a distinguished value to default to enable checks of whether it was supplied

getRequiredDoubleParameter

public static double getRequiredDoubleParameter(javax.servlet.http.HttpServletRequest request,
                                                java.lang.String name)
                                         throws ServletRequestBindingException

getRequiredBooleanParameter

public static boolean getRequiredBooleanParameter(javax.servlet.http.HttpServletRequest request,
                                                  java.lang.String name)
                                           throws ServletRequestBindingException

True is true or yes (no case) or 1