ScreenLoader (Apache Turbine 5.1 API)

java.lang.Object
- org.apache.turbine.modules.GenericLoader<Screen>
- - org.apache.turbine.modules.ScreenLoader

All Implemented Interfaces:

Loader<Screen>
```
public class ScreenLoader
extends GenericLoader<Screen>
```
The purpose of this class is to allow one to load and execute Screen modules.

Version:

$Id$

Author:

Dave Bryson, Henning P. Schmiedehausen, Peter Courcoux

Field Summary
- Fields inherited from class org.apache.turbine.modules.GenericLoader
  ab

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`String`	`eval(PipelineData pipelineData, String name)`	Attempts to load and execute the external Screen.
`void`	`exec(PipelineData pipelineData, String name)`	Attempts to load and execute the Screen.
`static ScreenLoader`	`getInstance()`	The method through which this class is accessed.

Methods inherited from class org.apache.turbine.modules.GenericLoader
getAssembler, getAssembler, getBasePackage, getCacheSize, getPackages, reload, setReload

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

- Method Detail
  - eval
```
public String eval(PipelineData pipelineData,
                   String name)
            throws Exception
```
    Attempts to load and execute the external Screen. This is used when you want to execute a Screen which returns its output via a String instead of out the data.getResponse() value. This allows you to easily chain the execution of Screen modules together.
    
    Parameters:
    
    pipelineData - Turbine information.
    
    name - Name of object that will execute the screen.
    
    Returns:
    
    the output of the screen module
    
    Throws:
    
    Exception - a generic exception.
  - exec
```
public void exec(PipelineData pipelineData,
                 String name)
          throws Exception
```
    Attempts to load and execute the Screen. This is used when you want to execute a Screen which returns its output via the data.getResponse() object.
    
    Specified by:
    
    exec in class GenericLoader<Screen>
    
    Parameters:
    
    pipelineData - Turbine information.
    
    name - Name of object that will execute the screen.
    
    Throws:
    
    Exception - a generic exception.
  - getInstance
```
public static ScreenLoader getInstance()
```
    The method through which this class is accessed.
    
    Returns:
    
    The single instance of this class.