ServletRequestWrapper (Java(TM) EE 7 Specification APIs)

java.lang.Object
- javax.servlet.ServletRequestWrapper

All Implemented Interfaces:

ServletRequest

Direct Known Subclasses:

HttpServletRequestWrapper
```
public class ServletRequestWrapper
extends 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

Constructor Summary

Constructors
Constructor and Description

ServletRequestWrapper(ServletRequest request)
Creates a ServletRequest adaptor wrapping the given request object.

Constructors
Constructor and Description
`ServletRequestWrapper(ServletRequest request)` Creates a ServletRequest adaptor wrapping the given request object.

Method Summary

Methods
Modifier and Type	Method and Description
`AsyncContext`	`getAsyncContext()` Gets the AsyncContext that was created or reinitialized by the most recent invocation of `startAsync()` or `startAsync(ServletRequest,ServletResponse)` on the wrapped request.
`Object`	`getAttribute(String name)` The default behavior of this method is to call getAttribute(String name) on the wrapped request object.
`Enumeration<String>`	`getAttributeNames()` The default behavior of this method is to return getAttributeNames() on the wrapped request object.
`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.
`String`	`getContentType()` The default behavior of this method is to return getContentType() on the wrapped request object.
`DispatcherType`	`getDispatcherType()` Gets the dispatcher type of the wrapped request.
`ServletInputStream`	`getInputStream()` The default behavior of this method is to return getInputStream() on the wrapped request object.
`String`	`getLocalAddr()` The default behavior of this method is to return getLocalAddr() on the wrapped request object.
`Locale`	`getLocale()` The default behavior of this method is to return getLocale() on the wrapped request object.
`Enumeration<Locale>`	`getLocales()` The default behavior of this method is to return getLocales() on the wrapped request object.
`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.
`String`	`getParameter(String name)` The default behavior of this method is to return getParameter(String name) on the wrapped request object.
`Map<String,String[]>`	`getParameterMap()` The default behavior of this method is to return getParameterMap() on the wrapped request object.
`Enumeration<String>`	`getParameterNames()` The default behavior of this method is to return getParameterNames() on the wrapped request object.
`String[]`	`getParameterValues(String name)` The default behavior of this method is to return getParameterValues(String name) on the wrapped request object.
`String`	`getProtocol()` The default behavior of this method is to return getProtocol() on the wrapped request object.
`BufferedReader`	`getReader()` The default behavior of this method is to return getReader() on the wrapped request object.
`String`	`getRealPath(String path)` Deprecated. As of Version 2.1 of the Java Servlet API, use `ServletContext.getRealPath(java.lang.String)` instead
`String`	`getRemoteAddr()` The default behavior of this method is to return getRemoteAddr() on the wrapped request object.
`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()` Return the wrapped request object.
`RequestDispatcher`	`getRequestDispatcher(String path)` The default behavior of this method is to return getRequestDispatcher(String path) on the wrapped request object.
`String`	`getScheme()` The default behavior of this method is to return getScheme() on the wrapped request object.
`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()` Gets the servlet context to which the wrapped servlet request was last dispatched.
`boolean`	`isAsyncStarted()` Checks if the wrapped request has been put into asynchronous mode.
`boolean`	`isAsyncSupported()` Checks if the wrapped request supports asynchronous operation.
`boolean`	`isSecure()` The default behavior of this method is to return isSecure() on the wrapped request object.
`boolean`	`isWrapperFor(Class<?> wrappedType)` Checks (recursively) if this ServletRequestWrapper wraps a `ServletRequest` of the given class type.
`boolean`	`isWrapperFor(ServletRequest wrapped)` Checks (recursively) if this ServletRequestWrapper wraps the given `ServletRequest` instance.
`void`	`removeAttribute(String name)` The default behavior of this method is to call removeAttribute(String name) on the wrapped request object.
`void`	`setAttribute(String name, Object o)` The default behavior of this method is to return setAttribute(String name, Object o) on the wrapped request object.
`void`	`setCharacterEncoding(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 invoke `ServletRequest.startAsync()` on the wrapped request object.
`AsyncContext`	`startAsync(ServletRequest servletRequest, ServletResponse servletResponse)` The default behavior of this method is to invoke `ServletRequest.startAsync(ServletRequest, ServletResponse)` on the wrapped request object.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - ServletRequestWrapper
```
public ServletRequestWrapper(ServletRequest request)
```
    Creates a ServletRequest adaptor wrapping the given request object.
    
    Throws:
    
    IllegalArgumentException - if the request is null
- Method Detail
  - getRequest
```
public ServletRequest getRequest()
```
    Return the wrapped request object.
  - setRequest
```
public void setRequest(ServletRequest request)
```
    Sets the request object being wrapped.
    
    Throws:
    
    IllegalArgumentException - if the request is null.
  - getAttribute
```
public Object getAttribute(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 Enumeration<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 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(String enc)
                          throws 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 - String containing the name of the character encoding.
    
    Throws:
    
    UnsupportedEncodingException - if this ServletRequest is still in a state where a character encoding may be set, but the specified encoding is invalid
  - 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 containing the length of the request body or -1L if the length is not known
    Since:
    
    Servlet 3.1
  - getContentType
```
public 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 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:
    
    IOException - if an input or output exception occurred
  - getParameter
```
public String getParameter(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 Map<String,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 Enumeration<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 String[] getParameterValues(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 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 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 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 BufferedReader getReader()
                         throws 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:
    
    UnsupportedEncodingException - if the character set encoding used is not supported and the text cannot be decoded
    
    IOException - if an input or output exception occurred
    See Also:
    ServletRequest.getInputStream()
  - getRemoteAddr
```
public 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 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(String name,
                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(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 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 Enumeration<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(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 String getRealPath(String path)
```
    Deprecated. As of Version 2.1 of the Java Servlet API, use ServletContext.getRealPath(java.lang.String) instead
    
    The default behavior of this method is to return getRealPath(String path) on the wrapped request object.
    
    Specified by:
    
    getRealPath in interface ServletRequest
  - 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 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 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()
```
    Gets the servlet context to which the wrapped servlet request was last dispatched.
    
    Specified by:
    
    getServletContext in interface ServletRequest
    
    Returns:
    the servlet context to which the wrapped servlet request was last dispatched
    Since:
    
    Servlet 3.0
  - startAsync
```
public AsyncContext startAsync()
                        throws IllegalStateException
```
    The default behavior of this method is to invoke ServletRequest.startAsync() on the wrapped request object.
    
    Specified by:
    
    startAsync in interface ServletRequest
    
    Returns:
    the (re)initialized AsyncContext
    
    Throws:
    
    IllegalStateException - if the request is within the scope of a filter or servlet that does not support asynchronous operations (that is, isAsyncSupported() returns false), or if this method is called again without any asynchronous dispatch (resulting from one of the AsyncContext.dispatch() methods), is called outside the scope of any such dispatch, or is called again within the scope of the same dispatch, or if the response has already been closed
    Since:
    
    Servlet 3.0
    
    See Also:
    ServletRequest.startAsync()
  - startAsync
```
public AsyncContext startAsync(ServletRequest servletRequest,
                      ServletResponse servletResponse)
                        throws IllegalStateException
```
    The default behavior of this method is to invoke ServletRequest.startAsync(ServletRequest, ServletResponse) on the wrapped request object.
    
    Specified by:
    
    startAsync in interface ServletRequest
    
    Parameters:
    servletRequest - the ServletRequest used to initialize the AsyncContext
    servletResponse - the ServletResponse used to initialize the AsyncContext
    
    Returns:
    the (re)initialized AsyncContext
    
    Throws:
    
    IllegalStateException - if the request is within the scope of a filter or servlet that does not support asynchronous operations (that is, isAsyncSupported() returns false), or if this method is called again without any asynchronous dispatch (resulting from one of the AsyncContext.dispatch() methods), is called outside the scope of any such dispatch, or is called again within the scope of the same dispatch, or if the response has already been closed
    Since:
    
    Servlet 3.0
    
    See Also:
    ServletRequest.startAsync(ServletRequest, ServletResponse)
  - isAsyncStarted
```
public boolean isAsyncStarted()
```
    Checks if the wrapped request has been put into asynchronous mode.
    
    Specified by:
    
    isAsyncStarted in interface ServletRequest
    
    Returns:
    true if this request has been put into asynchronous mode, false otherwise
    Since:
    
    Servlet 3.0
    
    See Also:
    ServletRequest.isAsyncStarted()
  - isAsyncSupported
```
public boolean isAsyncSupported()
```
    Checks if the wrapped request supports asynchronous operation.
    
    Specified by:
    
    isAsyncSupported in interface ServletRequest
    
    Returns:
    true if this request supports asynchronous operation, false otherwise
    Since:
    
    Servlet 3.0
    
    See Also:
    ServletRequest.isAsyncSupported()
  - getAsyncContext
```
public AsyncContext getAsyncContext()
```
    Gets the AsyncContext that was created or reinitialized by the most recent invocation of startAsync() or startAsync(ServletRequest,ServletResponse) on the wrapped request.
    
    Specified by:
    
    getAsyncContext in interface ServletRequest
    
    Returns:
    the AsyncContext that was created or reinitialized by the most recent invocation of startAsync() or startAsync(ServletRequest,ServletResponse) on the wrapped request
    
    Throws:
    
    IllegalStateException - if this request has not been put into asynchronous mode, i.e., if neither startAsync() nor startAsync(ServletRequest,ServletResponse) has been called
    Since:
    
    Servlet 3.0
    
    See Also:
    ServletRequest.getAsyncContext()
  - isWrapperFor
```
public boolean isWrapperFor(ServletRequest wrapped)
```
    Checks (recursively) if this ServletRequestWrapper wraps the given ServletRequest instance.
    
    Parameters:
    wrapped - the ServletRequest instance to search for
    
    Returns:
    true if this ServletRequestWrapper wraps the given ServletRequest instance, false otherwise
    Since:
    
    Servlet 3.0
  - isWrapperFor
```
public boolean isWrapperFor(Class<?> wrappedType)
```
    Checks (recursively) if this ServletRequestWrapper wraps a ServletRequest of the given class type.
    
    Parameters:
    wrappedType - the ServletRequest class type to search for
    
    Returns:
    true if this ServletRequestWrapper wraps a ServletRequest of the given class type, false otherwise
    
    Throws:
    
    IllegalArgumentException - if the given class does not implement ServletRequest
    Since:
    
    Servlet 3.0
  - getDispatcherType
```
public DispatcherType getDispatcherType()
```
    Gets the dispatcher type of the wrapped request.
    
    Specified by:
    
    getDispatcherType in interface ServletRequest
    
    Returns:
    the dispatcher type of the wrapped request
    Since:
    
    Servlet 3.0
    
    See Also:
    ServletRequest.getDispatcherType()

Class ServletRequestWrapper

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ServletRequestWrapper

Method Detail

getRequest

setRequest

getAttribute

getAttributeNames

getCharacterEncoding

setCharacterEncoding

getContentLength

getContentLengthLong

getContentType

getInputStream

getParameter

getParameterMap

getParameterNames

getParameterValues

getProtocol

getScheme

getServerName

getServerPort

getReader

getRemoteAddr

getRemoteHost

setAttribute

removeAttribute

getLocale

getLocales

isSecure

getRequestDispatcher

getRealPath

getRemotePort

getLocalName

getLocalAddr

getLocalPort

getServletContext

startAsync

startAsync

isAsyncStarted

isAsyncSupported

getAsyncContext

isWrapperFor

isWrapperFor

getDispatcherType