org.trimou.engine.context

Interface ExecutionContext

@Internal
public interface ExecutionContext

The execution context is implemented as a hierarchy of immutable objects. Each modification results in a new child context whose parent represents the state before the modification. The child context does not copy the entire state. Instead, it's delegating to parent in some cases.

Author:

Martin Kouba

Method Summary

Modifier and Type	Method and Description
Segment	getDefiningSection(String name)
Object	getFirstContextObject()
ExecutionContext	getParent()
ValueWrapper	getValue(String key)
ValueWrapper	getValue(String key, String[] keyParts, AtomicReference<EnhancedResolver.Hint> hintRef)
ExecutionContext	setContextObject(Object object)
ExecutionContext	setDefiningSections(Iterable<Segment> segments) Associate the given defining sections with the context, but only if no defining section with the same name is already associated.
ExecutionContext	setTemplateInvocation(Template template)

Method Detail

getValue

ValueWrapper getValue(String key,
                      String[] keyParts,
                      AtomicReference<EnhancedResolver.Hint> hintRef)

Parameters:

key -

keyParts -

hintRef -

Returns:

the wrapper for the given key

getValue

ValueWrapper getValue(String key)

Parameters:

key -

Returns:

the wrapper for the given key

setContextObject

ExecutionContext setContextObject(Object object)

Parameters:

object -

Returns:

a new child execution context

getFirstContextObject

Object getFirstContextObject()

Returns:

the first non-null context object (walking up the hierarchy if needed), or null if not found

setTemplateInvocation

ExecutionContext setTemplateInvocation(Template template)

Parameters:

template -

Returns:

a new child execution context

setDefiningSections

ExecutionContext setDefiningSections(Iterable<Segment> segments)

Associate the given defining sections with the context, but only if no defining section with the same name is already associated.

Parameters:

segments -

Returns:

a new child execution context

See Also:

ExtendSegment

getDefiningSection

Segment getDefiningSection(String name)

Parameters:

name -

Returns:

the defining section with the specified name or null if no such associated with the context

See Also:

ExtendSegment

getParent

ExecutionContext getParent()

Returns:

the parent execution context or null