StreamChangeListener

java.lang.Object
- ptolemy.kernel.util.StreamChangeListener

All Implemented Interfaces:

ChangeListener
```
public class StreamChangeListener
extends java.lang.Object
implements ChangeListener
```
A change listener that describes the changes on the standard output. It simply prints the description of the change once it executes (or throws an exception).

Since:

Ptolemy II 1.0

Version:

$Id$

Author:

Edward A. Lee

Pt.AcceptedRating:

Green (neuendor)

Pt.ProposedRating:

Green (eal)

Field Summary

Fields
Modifier and Type Field Description

protected java.io.PrintStream _output
The PrintStream that we direct the output to.

Constructor Summary

Constructors
Constructor	Description
`StreamChangeListener()`	Create a change listener that sends messages to the standard output.
`StreamChangeListener(java.io.OutputStream out)`	Create a change listener that sends messages to the specified stream.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`changeExecuted(ChangeRequest change)`	Print the description of the change to the stream output.
`void`	`changeFailed(ChangeRequest change, java.lang.Exception exception)`	Print the description of the failure to the stream output.

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

- Field Detail
  - _output
```
protected java.io.PrintStream _output
```
    The PrintStream that we direct the output to.
- Constructor Detail
  - StreamChangeListener
```
public StreamChangeListener()
```
    Create a change listener that sends messages to the standard output.
  - StreamChangeListener
```
public StreamChangeListener(java.io.OutputStream out)
```
    Create a change listener that sends messages to the specified stream.
    
    Parameters:
    
    out - The stream to send messages to.
- Method Detail
  - changeExecuted
```
public void changeExecuted(ChangeRequest change)
```
    Print the description of the change to the stream output.
    
    Specified by:
    
    changeExecuted in interface ChangeListener
    
    Parameters:
    
    change - The change that has been executed.
  - changeFailed
```
public void changeFailed(ChangeRequest change,
                         java.lang.Exception exception)
```
    Print the description of the failure to the stream output.
    
    Specified by:
    
    changeFailed in interface ChangeListener
    
    Parameters:
    
    change - The change that has been executed.
    
    exception - The exception that occurred.