Package org.metricshub.jawk.ext

Class AbstractExtension

java.lang.Object

org.metricshub.jawk.ext.AbstractExtension

All Implemented Interfaces:

JawkExtension

Direct Known Subclasses:

CoreExtension, StdinExtension

public abstract class AbstractExtension
extends Object
implements JawkExtension

Base class of various extensions.

Provides functionality common to most extensions, such as VM and JRT variable management, and convenience methods such as checkNumArgs() and toAwkString().

Author:

Danny Daglas

Constructor Summary

Constructors

Constructor	Description
AbstractExtension()

Method Summary

Modifier and Type	Method	Description
Map<String,ExtensionFunction>	getExtensionFunctions()	Returns the mapping between Awk keywords and the functions implemented by this extension.
String	getExtensionName()	getExtensionName.
void	init(VariableManager vmParam, JRT runtime, AwkSettings conf)	Called after the creation and before normal processing of the extension, pass in the Jawk Runtime Manager and the Variable Manager once.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

AbstractExtension

public AbstractExtension()

Method Details

getExtensionName

public String getExtensionName()

getExtensionName.

Specified by:

getExtensionName in interface JawkExtension

Returns:

name of the extension package.

init

public void init(VariableManager vmParam,
 JRT runtime,
 AwkSettings conf)

Called after the creation and before normal processing of the extension, pass in the Jawk Runtime Manager and the Variable Manager once.

It is guaranteed init() is called before invoke() is called.

Specified by:

init in interface JawkExtension

Parameters:

vmParam - Reference to the Variable Manager

runtime - Reference to the Runtime

conf - Reference to the settings

getExtensionFunctions

public Map<String,ExtensionFunction> getExtensionFunctions()

Returns the mapping between Awk keywords and the functions implemented by this extension. The returned map must be unmodifiable.

Specified by:

getExtensionFunctions in interface JawkExtension

Returns:

mapping from keyword to ExtensionFunction