de.uni_hildesheim.sse.vil.templatelang

Class VtlExpressionParser

java.lang.Object

net.ssehub.easy.basics.modelManagement.AbstractModelInitializer<Template>

de.uni_hildesheim.sse.vil.templatelang.VtlExpressionParser

All Implemented Interfaces:

ModelInitializer.IModelInitializer, IExpressionParser<Resolver>

public class VtlExpressionParser
extends AbstractModelInitializer<Template>
implements IExpressionParser<Resolver>

Provides an expression parser for VTL.

Author:

Holger Eichelberger

Constructor Summary

Constructors

Constructor and Description
VtlExpressionParser()

Method Summary

Modifier and Type	Method and Description
protected void	activate(org.osgi.service.component.ComponentContext context) Private method to activate plugin.
protected void	deactivate(org.osgi.service.component.ComponentContext context) Private method to to de-activate plugin.
protected IModelLoader<Template>	getModelLoader() Returns the actual model loader.
protected ModelManagement<Template>	getModelManagement() Returns the actual model management instance.
Expression	parse(java.lang.String text, IRuntimeEnvironment environment) Parses the given text into an expression.
Expression	parse(java.lang.String text, Resolver resolver) Parses the given text into an expression.
static VtlExpressionParser	register() Registers the expression parser in case that VTL shall be used without Eclipse-DS initialization.
static void	unregister(VtlExpressionParser parser) Unregisters the parser obtained from register().

Methods inherited from class net.ssehub.easy.basics.modelManagement.AbstractModelInitializer

addLocation, addLocationToFront, registerLoader, removeLocation, stripFile, unregisterLoader

Methods inherited from class java.lang.Object

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

Constructor Detail

VtlExpressionParser

public VtlExpressionParser()

Method Detail

register

public static VtlExpressionParser register()

Registers the expression parser in case that VTL shall be used without Eclipse-DS initialization. Do not call this method within Eclipse.

Returns:

the registered instance (for unregister(VtlExpressionParser))

unregister

public static void unregister(VtlExpressionParser parser)

Unregisters the parser obtained from register().

Parameters:

parser - the parser to unregister

activate

protected void activate(org.osgi.service.component.ComponentContext context)

Private method to activate plugin.

Parameters:

context - Context.

deactivate

protected void deactivate(org.osgi.service.component.ComponentContext context)

Private method to to de-activate plugin.

Parameters:

context - Context.

parse

public Expression parse(java.lang.String text,
                        IRuntimeEnvironment environment)
                 throws VilException

Description copied from interface: IExpressionParser

Parses the given text into an expression. Resolution will happen in a separate resolver instance.

Specified by:

parse in interface IExpressionParser<Resolver>

Parameters:

text - the text to be parsed

environment - the runtime environment used to resolve variables

Returns:

the parsed expression

Throws:

VilException - in case of parse problems

parse

public Expression parse(java.lang.String text,
                        Resolver resolver)
                 throws VilException

Description copied from interface: IExpressionParser

Parses the given text into an expression. Resolution will happen in the given resolver instance.

Specified by:

parse in interface IExpressionParser<Resolver>

Parameters:

text - the text to be parsed

resolver - a resolver instance providing a parse environment consisting of variables

Returns:

the parsed expression

Throws:

VilException - in case of parse problems

getModelManagement

protected ModelManagement<Template> getModelManagement()

Description copied from class: AbstractModelInitializer

Returns the actual model management instance.

Specified by:

getModelManagement in class AbstractModelInitializer<Template>

Returns:

the model management instance

getModelLoader

protected IModelLoader<Template> getModelLoader()

Description copied from class: AbstractModelInitializer

Returns the actual model loader.

Specified by:

getModelLoader in class AbstractModelInitializer<Template>

Returns:

the model loader (may be null if registration of the loader is done differently)