Package org.jppf.scripting

Class BaseScriptEvaluator

java.lang.Object

org.jppf.scripting.BaseScriptEvaluator

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ScriptedJobSelector, ScriptedNodeSelector

public class BaseScriptEvaluator
extends Object
implements Serializable

Base class for implementing and embedding all sorts of scripted logic. Scripts are evaluated using the javax.script.* API (JSR-223).

Since:

5.2

Author:

Laurent Cohen

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
BaseScriptEvaluator(String language, File scriptFile)	Initialize this selector with the specfied language and script file.
BaseScriptEvaluator(String language, Reader scriptReader)	Initialize this selector with the specfied language and script reader.
BaseScriptEvaluator(String language, String script)	Initialize this selector with the specfied language and script.

Method Summary

Modifier and Type	Method	Description
protected Object	evaluate(Map<String,Object> variables)	Evaluate the script with the specified variable bindings.
String	getLanguage()	Get the language of the script to evaluate.
String	getScript()	Get the script to evaluate.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

BaseScriptEvaluator

public BaseScriptEvaluator(String language,
 String script)

Initialize this selector with the specfied language and script.

Parameters:

language - the language of the script to evaluate.

script - the script to evaluate.

BaseScriptEvaluator

public BaseScriptEvaluator(String language,
 Reader scriptReader)
                    throws IOException

Initialize this selector with the specfied language and script reader.

Parameters:

language - the language of the script to evaluate.

scriptReader - a reader from which to read the script to evaluate.

Throws:

IOException - if the script could not be read.

BaseScriptEvaluator

public BaseScriptEvaluator(String language,
 File scriptFile)
                    throws IOException

Initialize this selector with the specfied language and script file.

Parameters:

language - the language of the script to evaluate.

scriptFile - a file from which to read the script to evaluate.

Throws:

IOException - if the script could not be read.

Method Details

getLanguage

public String getLanguage()

Get the language of the script to evaluate.

Returns:

the language as a string.

getScript

public String getScript()

Get the script to evaluate.

Returns:

th script as a string.

evaluate

protected Object evaluate(Map<String,Object> variables)

Evaluate the script with the specified variable bindings.

Parameters:

variables - the variables to use i the script.

Returns:

whatever is returned by the script, or null if the script evaluation raised an exception.

toString

public String toString()

Overrides:

toString in class Object