org.apache.sling.scripting.sightly.impl.engine.bundled

Class BundledUnitManagerImpl

java.lang.Object

org.apache.sling.scripting.sightly.impl.engine.bundled.BundledUnitManagerImpl

All Implemented Interfaces:

BundledUnitManager

public class BundledUnitManagerImpl
extends Object
implements BundledUnitManager

This service allows various components to work with BundledRenderUnit instance and perform dependency resolution based on their availability in the Bindings maps passed to the HTL Script Engine.

Constructor Summary

Constructors

Constructor and Description
BundledUnitManagerImpl()

Method Summary

Modifier and Type	Method and Description
@Nullable ClassLoader	getBundledRenderUnitClassloader(Bindings bindings) Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and if the object provided by BundledRenderUnit.getUnit() is an instance of a RenderUnit.
@Nullable org.apache.sling.scripting.sightly.render.RenderUnit	getRenderUnit(@NotNull Bindings bindings) Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and return the object provided by BundledRenderUnit.getUnit() if this is an instance of a RenderUnit.
@Nullable org.apache.sling.scripting.sightly.render.RenderUnit	getRenderUnit(@NotNull Bindings bindings, @NotNull String identifier) Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and if the object provided by BundledRenderUnit.getUnit() is an instance of a RenderUnit.
@Nullable URL	getScript(Bindings bindings, String identifier) Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and, if a BundledRenderUnit is found, attempt to return the URL of dependency that the BundledRenderUnit needs to load.
<T> T	getServiceForBundledRenderUnit(Bindings bindings, Class<T> clazz) Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and if the object provided by BundledRenderUnit.getUnit() is an instance of a RenderUnit.

Methods inherited from class java.lang.Object

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

Constructor Detail

BundledUnitManagerImpl

public BundledUnitManagerImpl()

Method Detail

getRenderUnit

@Nullable
public @Nullable org.apache.sling.scripting.sightly.render.RenderUnit getRenderUnit(@NotNull
                                                                                              @NotNull Bindings bindings)

Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and return the object provided by BundledRenderUnit.getUnit() if this is an instance of a RenderUnit.

Parameters:

bindings - the bindings passed initially to the HTL Script Engine

Returns:

a RenderUnit if one is found, null otherwise

getRenderUnit

@Nullable
public @Nullable org.apache.sling.scripting.sightly.render.RenderUnit getRenderUnit(@NotNull
                                                                                              @NotNull Bindings bindings,
                                                                                              @NotNull
                                                                                              @NotNull String identifier)

Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and if the object provided by BundledRenderUnit.getUnit() is an instance of a RenderUnit. If so, this service will try to locate another RenderUnit based on the passed identifier and the coordinates of the RenderUnit found in the bindings map.

This method is suited for finding template libraries (collections of templates provided by the same RenderUnit).

Parameters:

bindings - the bindings passed initially to the HTL Script Engine

identifier - the identifier of the RenderUnit that has to be retrieved and returned

Returns:

a RenderUnit if one is found, null otherwise

getScript

@Nullable
public @Nullable URL getScript(Bindings bindings,
                                         String identifier)

Description copied from interface: BundledUnitManager

Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and, if a BundledRenderUnit is found, attempt to return the URL of dependency that the BundledRenderUnit needs to load. This will take into account the bundle wirings of the unit's providing bundle (see BundledRenderUnit.getBundle()).

Specified by:

getScript in interface BundledUnitManager

Parameters:

bindings - the bindings passed initially to the HTL Script Engine

identifier - the identifier of the dependency that a BundledRenderUnit from the Bindings needs to load

Returns:

the URL of the identifier dependency, if one was found

getBundledRenderUnitClassloader

@Nullable
public @Nullable ClassLoader getBundledRenderUnitClassloader(Bindings bindings)

Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and if the object provided by BundledRenderUnit.getUnit() is an instance of a RenderUnit. If so, this service will return the ClassLoader of the Bundle providing the BundledRenderUnit.

Specified by:

getBundledRenderUnitClassloader in interface BundledUnitManager

Parameters:

bindings - the bindings passed initially to the HTL Script Engine

Returns:

the BundledRenderUnit's classloader if one is found, null otherwise

getServiceForBundledRenderUnit

@Nullable
public <T> T getServiceForBundledRenderUnit(Bindings bindings,
                                                      Class<T> clazz)

Given a Bindings map, this method will check if the bindings contain a value for the BundledRenderUnit.VARIABLE property and if the object provided by BundledRenderUnit.getUnit() is an instance of a RenderUnit. If so, this service will try to get a reference to a service of type clazz and return the service object. The service will be retrieved using the bundle context of the BundledRenderUnit found in the bindings map.

Type Parameters:

T - the service type

Parameters:

bindings - the bindings passed initially to the HTL Script Engine

clazz - the class identifying the type of the service

Returns:

a service object, if one is found, null otherwise