Package javax.servlet

Class ServletRequestWrapper

  • All Implemented Interfaces:
    ServletRequest
    Direct Known Subclasses:
    HttpServletRequestWrapper, ServletRequestHttpWrapper
    public class ServletRequestWrapper
extends java.lang.Object
implements ServletRequest
    Provides a convenient implementation of the ServletRequest interface that can be subclassed by developers wishing to adapt the request to a Servlet. This class implements the Wrapper or Decorator pattern. Methods default to calling through to the wrapped request object.
    Since:
    Servlet 2.3
    See Also:
    ServletRequest

    • Method Summary

      All Methods Instance Methods Concrete Methods Deprecated Methods 
      Modifier and Type Method Description
      AsyncContext getAsyncContext()
      The default behavior of this method is to return getAsyncContext() on the wrapped request object.
      java.lang.Object getAttribute​(java.lang.String name)
      The default behavior of this method is to call getAttribute(String name) on the wrapped request object.
      java.util.Enumeration<java.lang.String> getAttributeNames()
      The default behavior of this method is to return getAttributeNames() on the wrapped request object.
      java.lang.String getCharacterEncoding()
      The default behavior of this method is to return getCharacterEncoding() on the wrapped request object.
      int getContentLength()
      The default behavior of this method is to return getContentLength() on the wrapped request object.
      long getContentLengthLong()
      The default behavior of this method is to return getContentLengthLong() on the wrapped request object.
      java.lang.String getContentType()
      The default behavior of this method is to return getContentType() on the wrapped request object.
      DispatcherType getDispatcherType()
      The default behavior of this method is to call getDispatcherType() on the wrapped request object.
      ServletInputStream getInputStream()
      The default behavior of this method is to return getInputStream() on the wrapped request object.
      java.lang.String getLocalAddr()
      The default behavior of this method is to return getLocalAddr() on the wrapped request object.
      java.util.Locale getLocale()
      The default behavior of this method is to return getLocale() on the wrapped request object.
      java.util.Enumeration<java.util.Locale> getLocales()
      The default behavior of this method is to return getLocales() on the wrapped request object.
      java.lang.String getLocalName()
      The default behavior of this method is to return getLocalName() on the wrapped request object.
      int getLocalPort()
      The default behavior of this method is to return getLocalPort() on the wrapped request object.
      java.lang.String getParameter​(java.lang.String name)
      The default behavior of this method is to return getParameter(String name) on the wrapped request object.
      java.util.Map<java.lang.String,​java.lang.String[]> getParameterMap()
      The default behavior of this method is to return getParameterMap() on the wrapped request object.
      java.util.Enumeration<java.lang.String> getParameterNames()
      The default behavior of this method is to return getParameterNames() on the wrapped request object.
      java.lang.String[] getParameterValues​(java.lang.String name)
      The default behavior of this method is to return getParameterValues(String name) on the wrapped request object.
      java.lang.String getProtocol()
      The default behavior of this method is to return getProtocol() on the wrapped request object.
      java.io.BufferedReader getReader()
      The default behavior of this method is to return getReader() on the wrapped request object.
      java.lang.String getRealPath​(java.lang.String path)
      Deprecated.
      As of Version 3.0 of the Java Servlet API
      java.lang.String getRemoteAddr()
      The default behavior of this method is to return getRemoteAddr() on the wrapped request object.
      java.lang.String getRemoteHost()
      The default behavior of this method is to return getRemoteHost() on the wrapped request object.
      int getRemotePort()
      The default behavior of this method is to return getRemotePort() on the wrapped request object.
      ServletRequest getRequest()
      Get the wrapped request.
      RequestDispatcher getRequestDispatcher​(java.lang.String path)
      The default behavior of this method is to return getRequestDispatcher(String path) on the wrapped request object.
      java.lang.String getScheme()
      The default behavior of this method is to return getScheme() on the wrapped request object.
      java.lang.String getServerName()
      The default behavior of this method is to return getServerName() on the wrapped request object.
      int getServerPort()
      The default behavior of this method is to return getServerPort() on the wrapped request object.
      ServletContext getServletContext()
      The default behavior of this method is to return getServletContext() on the wrapped request object.
      boolean isAsyncStarted()
      The default behavior of this method is to return isAsyncStarted() on the wrapped request object.
      boolean isAsyncSupported()
      The default behavior of this method is to return isAsyncSupported() on the wrapped request object.
      boolean isSecure()
      The default behavior of this method is to return isSecure() on the wrapped request object.
      boolean isWrapperFor​(java.lang.Class<?> wrappedType)
      TODO SERVLET3 - Add comments
      boolean isWrapperFor​(ServletRequest wrapped)
      TODO SERVLET3 - Add comments
      void removeAttribute​(java.lang.String name)
      The default behavior of this method is to call removeAttribute(String name) on the wrapped request object.
      void setAttribute​(java.lang.String name, java.lang.Object o)
      The default behavior of this method is to return setAttribute(String name, Object o) on the wrapped request object.
      void setCharacterEncoding​(java.lang.String enc)
      The default behavior of this method is to set the character encoding on the wrapped request object.
      void setRequest​(ServletRequest request)
      Sets the request object being wrapped.
      AsyncContext startAsync()
      The default behavior of this method is to return startAsync() on the wrapped request object.
      AsyncContext startAsync​(ServletRequest servletRequest, ServletResponse servletResponse)
      The default behavior of this method is to return startAsync(Runnable) on the wrapped request object.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • ServletRequestWrapper

        public ServletRequestWrapper​(ServletRequest request)
        Creates a ServletRequest adaptor wrapping the given request object.
        Parameters:
        request - The request to wrap
        Throws:
        java.lang.IllegalArgumentException - if the request is null

    • Method Detail

      • getRequest

        public ServletRequest getRequest()
        Get the wrapped request.
        Returns:
        the wrapped request object

      • setRequest

        public void setRequest​(ServletRequest request)
        Sets the request object being wrapped.
        Parameters:
        request - The new wrapped request.
        Throws:
        java.lang.IllegalArgumentException - if the request is null.

      • getAttribute

        public java.lang.Object getAttribute​(java.lang.String name)
        The default behavior of this method is to call getAttribute(String name) on the wrapped request object.
        Specified by:
        getAttribute in interface ServletRequest
        Parameters:
        name - a String specifying the name of the attribute
        Returns:
        an Object containing the value of the attribute, or null if the attribute does not exist

      • getAttributeNames

        public java.util.Enumeration<java.lang.String> getAttributeNames()
        The default behavior of this method is to return getAttributeNames() on the wrapped request object.
        Specified by:
        getAttributeNames in interface ServletRequest
        Returns:
        an Enumeration of strings containing the names of the request's attributes

      • getCharacterEncoding

        public java.lang.String getCharacterEncoding()
        The default behavior of this method is to return getCharacterEncoding() on the wrapped request object.
        Specified by:
        getCharacterEncoding in interface ServletRequest
        Returns:
        a String containing the name of the character encoding, or null if the request does not specify a character encoding

      • setCharacterEncoding

        public void setCharacterEncoding​(java.lang.String enc)
                          throws java.io.UnsupportedEncodingException
        The default behavior of this method is to set the character encoding on the wrapped request object.
        Specified by:
        setCharacterEncoding in interface ServletRequest
        Parameters:
        enc - a String containing the name of the character encoding.
        Throws:
        java.io.UnsupportedEncodingException - if this is not a valid encoding

      • getContentLength

        public int getContentLength()
        The default behavior of this method is to return getContentLength() on the wrapped request object.
        Specified by:
        getContentLength in interface ServletRequest
        Returns:
        an integer containing the length of the request body or -1 if the length is not known or is greater than Integer.MAX_VALUE

      • getContentLengthLong

        public long getContentLengthLong()
        The default behavior of this method is to return getContentLengthLong() on the wrapped request object.
        Specified by:
        getContentLengthLong in interface ServletRequest
        Returns:
        a long integer containing the length of the request body or -1 if the length is not known
        Since:
        Servlet 3.1

      • getContentType

        public java.lang.String getContentType()
        The default behavior of this method is to return getContentType() on the wrapped request object.
        Specified by:
        getContentType in interface ServletRequest
        Returns:
        a String containing the name of the MIME type of the request, or null if the type is not known

      • getInputStream

        public ServletInputStream getInputStream()
                                  throws java.io.IOException
        The default behavior of this method is to return getInputStream() on the wrapped request object.
        Specified by:
        getInputStream in interface ServletRequest
        Returns:
        a ServletInputStream object containing the body of the request
        Throws:
        java.io.IOException - if an input or output exception occurred

      • getParameter

        public java.lang.String getParameter​(java.lang.String name)
        The default behavior of this method is to return getParameter(String name) on the wrapped request object.
        Specified by:
        getParameter in interface ServletRequest
        Parameters:
        name - a String specifying the name of the parameter
        Returns:
        a String representing the single value of the parameter
        See Also:
        ServletRequest.getParameterValues(java.lang.String)

      • getParameterMap

        public java.util.Map<java.lang.String,​java.lang.String[]> getParameterMap()
        The default behavior of this method is to return getParameterMap() on the wrapped request object.
        Specified by:
        getParameterMap in interface ServletRequest
        Returns:
        an immutable java.util.Map containing parameter names as keys and parameter values as map values. The keys in the parameter map are of type String. The values in the parameter map are of type String array.

      • getParameterNames

        public java.util.Enumeration<java.lang.String> getParameterNames()
        The default behavior of this method is to return getParameterNames() on the wrapped request object.
        Specified by:
        getParameterNames in interface ServletRequest
        Returns:
        an Enumeration of String objects, each String containing the name of a request parameter; or an empty Enumeration if the request has no parameters

      • getParameterValues

        public java.lang.String[] getParameterValues​(java.lang.String name)
        The default behavior of this method is to return getParameterValues(String name) on the wrapped request object.
        Specified by:
        getParameterValues in interface ServletRequest
        Parameters:
        name - a String containing the name of the parameter whose value is requested
        Returns:
        an array of String objects containing the parameter's values
        See Also:
        ServletRequest.getParameter(java.lang.String)

      • getProtocol

        public java.lang.String getProtocol()
        The default behavior of this method is to return getProtocol() on the wrapped request object.
        Specified by:
        getProtocol in interface ServletRequest
        Returns:
        a String containing the protocol name and version number

      • getScheme

        public java.lang.String getScheme()
        The default behavior of this method is to return getScheme() on the wrapped request object.
        Specified by:
        getScheme in interface ServletRequest
        Returns:
        a String containing the name of the scheme used to make this request

      • getServerName

        public java.lang.String getServerName()
        The default behavior of this method is to return getServerName() on the wrapped request object.
        Specified by:
        getServerName in interface ServletRequest
        Returns:
        a String containing the name of the server

      • getServerPort

        public int getServerPort()
        The default behavior of this method is to return getServerPort() on the wrapped request object.
        Specified by:
        getServerPort in interface ServletRequest
        Returns:
        an integer specifying the port number

      • getReader

        public java.io.BufferedReader getReader()
                                 throws java.io.IOException
        The default behavior of this method is to return getReader() on the wrapped request object.
        Specified by:
        getReader in interface ServletRequest
        Returns:
        a BufferedReader containing the body of the request
        Throws:
        java.io.UnsupportedEncodingException - if the character set encoding used is not supported and the text cannot be decoded
        java.io.IOException - if an input or output exception occurred
        See Also:
        ServletRequest.getInputStream()

      • getRemoteAddr

        public java.lang.String getRemoteAddr()
        The default behavior of this method is to return getRemoteAddr() on the wrapped request object.
        Specified by:
        getRemoteAddr in interface ServletRequest
        Returns:
        a String containing the IP address of the client that sent the request

      • getRemoteHost

        public java.lang.String getRemoteHost()
        The default behavior of this method is to return getRemoteHost() on the wrapped request object.
        Specified by:
        getRemoteHost in interface ServletRequest
        Returns:
        a String containing the fully qualified name of the client

      • setAttribute

        public void setAttribute​(java.lang.String name,
                         java.lang.Object o)
        The default behavior of this method is to return setAttribute(String name, Object o) on the wrapped request object.
        Specified by:
        setAttribute in interface ServletRequest
        Parameters:
        name - a String specifying the name of the attribute
        o - the Object to be stored

      • removeAttribute

        public void removeAttribute​(java.lang.String name)
        The default behavior of this method is to call removeAttribute(String name) on the wrapped request object.
        Specified by:
        removeAttribute in interface ServletRequest
        Parameters:
        name - a String specifying the name of the attribute to remove

      • getLocale

        public java.util.Locale getLocale()
        The default behavior of this method is to return getLocale() on the wrapped request object.
        Specified by:
        getLocale in interface ServletRequest
        Returns:
        the preferred Locale for the client

      • getLocales

        public java.util.Enumeration<java.util.Locale> getLocales()
        The default behavior of this method is to return getLocales() on the wrapped request object.
        Specified by:
        getLocales in interface ServletRequest
        Returns:
        an Enumeration of preferred Locale objects for the client

      • isSecure

        public boolean isSecure()
        The default behavior of this method is to return isSecure() on the wrapped request object.
        Specified by:
        isSecure in interface ServletRequest
        Returns:
        a boolean indicating if the request was made using a secure channel

      • getRequestDispatcher

        public RequestDispatcher getRequestDispatcher​(java.lang.String path)
        The default behavior of this method is to return getRequestDispatcher(String path) on the wrapped request object.
        Specified by:
        getRequestDispatcher in interface ServletRequest
        Parameters:
        path - a String specifying the pathname to the resource. If it is relative, it must be relative against the current servlet.
        Returns:
        a RequestDispatcher object that acts as a wrapper for the resource at the specified path, or null if the servlet container cannot return a RequestDispatcher
        See Also:
        RequestDispatcher, ServletContext.getRequestDispatcher(java.lang.String)

      • getRealPath

        public java.lang.String getRealPath​(java.lang.String path)
        Deprecated.
        As of Version 3.0 of the Java Servlet API
        The default behavior of this method is to return getRealPath(String path) on the wrapped request object.
        Specified by:
        getRealPath in interface ServletRequest
        Parameters:
        path - The virtual path to be converted to a real path
        Returns:
        ServletContext.getRealPath(String)

      • getRemotePort

        public int getRemotePort()
        The default behavior of this method is to return getRemotePort() on the wrapped request object.
        Specified by:
        getRemotePort in interface ServletRequest
        Returns:
        an integer specifying the port number
        Since:
        Servlet 2.4

      • getLocalName

        public java.lang.String getLocalName()
        The default behavior of this method is to return getLocalName() on the wrapped request object.
        Specified by:
        getLocalName in interface ServletRequest
        Returns:
        a String containing the host name of the IP on which the request was received.
        Since:
        Servlet 2.4

      • getLocalAddr

        public java.lang.String getLocalAddr()
        The default behavior of this method is to return getLocalAddr() on the wrapped request object.
        Specified by:
        getLocalAddr in interface ServletRequest
        Returns:
        a String containing the IP address on which the request was received.
        Since:
        Servlet 2.4

      • getLocalPort

        public int getLocalPort()
        The default behavior of this method is to return getLocalPort() on the wrapped request object.
        Specified by:
        getLocalPort in interface ServletRequest
        Returns:
        an integer specifying the port number
        Since:
        Servlet 2.4

      • getServletContext

        public ServletContext getServletContext()
        The default behavior of this method is to return getServletContext() on the wrapped request object.
        Specified by:
        getServletContext in interface ServletRequest
        Returns:
        TODO
        Since:
        Servlet 3.0

      • startAsync

        public AsyncContext startAsync()
                        throws java.lang.IllegalStateException
        The default behavior of this method is to return startAsync() on the wrapped request object.
        Specified by:
        startAsync in interface ServletRequest
        Returns:
        TODO
        Throws:
        java.lang.IllegalStateException - If asynchronous processing is not supported for this request or if the request is already in asynchronous mode
        Since:
        Servlet 3.0

      • startAsync

        public AsyncContext startAsync​(ServletRequest servletRequest,
                               ServletResponse servletResponse)
                        throws java.lang.IllegalStateException
        The default behavior of this method is to return startAsync(Runnable) on the wrapped request object.
        Specified by:
        startAsync in interface ServletRequest
        Parameters:
        servletRequest - The ServletRequest with which to initialise the asynchronous context
        servletResponse - The ServletResponse with which to initialise the asynchronous context
        Returns:
        TODO
        Throws:
        java.lang.IllegalStateException - If asynchronous processing is not supported for this request or if the request is already in asynchronous mode
        Since:
        Servlet 3.0

      • isAsyncStarted

        public boolean isAsyncStarted()
        The default behavior of this method is to return isAsyncStarted() on the wrapped request object.
        Specified by:
        isAsyncStarted in interface ServletRequest
        Returns:
        TODO
        Since:
        Servlet 3.0

      • isAsyncSupported

        public boolean isAsyncSupported()
        The default behavior of this method is to return isAsyncSupported() on the wrapped request object.
        Specified by:
        isAsyncSupported in interface ServletRequest
        Returns:
        TODO
        Since:
        Servlet 3.0

      • getAsyncContext

        public AsyncContext getAsyncContext()
        The default behavior of this method is to return getAsyncContext() on the wrapped request object.
        Specified by:
        getAsyncContext in interface ServletRequest
        Returns:
        The current AsyncContext
        Since:
        Servlet 3.0

      • isWrapperFor

        public boolean isWrapperFor​(ServletRequest wrapped)
        TODO SERVLET3 - Add comments
        Parameters:
        wrapped - The request to compare to the wrapped request
        Returns:
        true if the request wrapped by this wrapper (or series of wrappers) is the same as the supplied request, otherwise false
        Since:
        Servlet 3.0

      • isWrapperFor

        public boolean isWrapperFor​(java.lang.Class<?> wrappedType)
        TODO SERVLET3 - Add comments
        Parameters:
        wrappedType - The class to compare to the class of the wrapped request
        Returns:
        true if the request wrapped by this wrapper (or series of wrappers) is the same type as the supplied type, otherwise false
        Since:
        Servlet 3.0

      • getDispatcherType

        public DispatcherType getDispatcherType()
        The default behavior of this method is to call getDispatcherType() on the wrapped request object.
        Specified by:
        getDispatcherType in interface ServletRequest
        Returns:
        TODO
        Since:
        Servlet 3.0