Wrapper (Context propagation (core, java-5) 1.0.7 API)

java.lang.Object
- nl.talsmasoftware.context.delegation.Wrapper<T>

Direct Known Subclasses:

DelegatingExecutorService, DelegatingFuture, WrapperWithContext
```
public abstract class Wrapper<T>
extends Object
```
Base wrapper class offering a non-null delegate method.

Author:

Sjoerd Talsma

Constructor Summary

Constructors
Modifier Constructor Description

protected Wrapper(T delegate)
Constructor providing a delegate wrapped object.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected T`	`delegate()`	Delegate method that can be overridden in case the delegate is not yet available at construction time or when there some strategy applicable that determines the delegate at runtime.
`boolean`	`equals(Object other)`
`int`	`hashCode()`
`protected T`	`nonNullDelegate()`	Acessor to provide a guaranteed non-`null` delegate instance for use within delegation method implementations.
`String`	`toString()`

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

- Constructor Detail
  - Wrapper
```
protected Wrapper(T delegate)
```
    Constructor providing a delegate wrapped object.
    
    Parameters:
    
    delegate - The delegate object being wrapped. This may only be null if the delegate() method is overridden to provide an alternative non-null result.
- Method Detail
  - delegate
```
protected T delegate()
```
    Delegate method that can be overridden in case the delegate is not yet available at construction time or when there some strategy applicable that determines the delegate at runtime.
    By default, the specified delegate value from the constructor is returned.
    
    Returns:
    
    The delegate for this wrapper.
  - nonNullDelegate
```
protected final T nonNullDelegate()
```
    Acessor to provide a guaranteed non-null delegate instance for use within delegation method implementations.
    
    Returns:
    
    The delegate for this wrapper (guaranteed to be non-null).
    
    Throws:
    
    NullPointerException - with a specific message in case the delegate was null.
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - equals
```
public boolean equals(Object other)
```
    Overrides:
    
    equals in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
    
    Returns:
    
    The class name and the delegate string representation.