FilterConfigWrapper (servlet-utils 2.0 API)

java.lang.Object
- com.github.robtimus.servlet.FilterConfigWrapper

All Implemented Interfaces:

FilterConfig
```
public class FilterConfigWrapper
extends Object
implements FilterConfig
```
A wrapper around an existing FilterConfig instance. By default it delegates all methods. However, it also allows initialization parameters to be added or overwritten. This can be useful when a sub class of some filter needs to provide hard-coded or calculated initialization parameter values to its parent class. For instance:
```
 public void init(FilterConfig filterConfig) {
     super.init(new FilterConfigWrapper(filterConfig)
             .withInitParameter("booleanParameter", true)
             .withInitParameter("intParameter", 100));
 }
 
```
Author:

Rob Spoor

Constructor Summary

Constructors
Constructor Description

FilterConfigWrapper(FilterConfig filterConfig)
Creates a new FilterConfig wrapper.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`getFilterName()`
`String`	`getInitParameter(String name)`
`Enumeration<String>`	`getInitParameterNames()`
`ServletContext`	`getServletContext()`
`FilterConfigWrapper`	`withInitParameter(String name, Object value)`	Adds or overwrites an initialization parameter.

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

- Constructor Detail
  - FilterConfigWrapper
```
public FilterConfigWrapper(FilterConfig filterConfig)
```
    Creates a new FilterConfig wrapper.
    
    Parameters:
    
    filterConfig - The FilterConfig object to wrap.
    
    Throws:
    
    NullPointerException - If the given FilterConfig object is null.
- Method Detail
  - getFilterName
```
public String getFilterName()
```
    Specified by:
    
    getFilterName in interface FilterConfig
  - getServletContext
```
public ServletContext getServletContext()
```
    Specified by:
    
    getServletContext in interface FilterConfig
  - getInitParameter
```
public String getInitParameter(String name)
```
    Specified by:
    
    getInitParameter in interface FilterConfig
  - getInitParameterNames
```
public Enumeration<String> getInitParameterNames()
```
    Specified by:
    
    getInitParameterNames in interface FilterConfig
  - withInitParameter
```
public FilterConfigWrapper withInitParameter(String name,
                                             Object value)
```
    Adds or overwrites an initialization parameter.
    
    Parameters:
    
    name - The name of the initialization parameter.
    
    value - The value for the initialization parameter. Its string representation will be used.
    
    Returns:
    
    This object.
    
    Throws:
    
    NullPointerException - If the given name or value is null.