org.apache.velocity.runtime.directive
Class Scope

java.lang.Object
  java.util.AbstractMap
      org.apache.velocity.runtime.directive.Scope

All Implemented Interfaces:

Map

Direct Known Subclasses:

ForeachScope

public class Scope

extends AbstractMap

This handles context scoping and metadata for directives.

Version:

$Id$

Author:

Nathan Bubna

Nested Class Summary

static class

Scope.Info Class to encapsulate and provide access to info about the current scope for debugging.

Nested classes inherited from class java.util.Map

Map.Entry

Field Summary

protected Object

owner

Constructor Summary

Scope(Object owner, Object previous)

Method Summary

Set	entrySet()
Object	get(Object key)
protected int	getDepth() Returns the number of control arguments of this type that are stacked up.
Scope.Info	getInfo() Returns info about the current scope for debugging purposes.
Scope	getParent() Returns the parent control reference overridden by the placement of this instance in the context.
Object	getReplaced() Returns the user's context reference overridden by the placement of this instance in the context.
Scope	getTopmost() Returns the topmost parent control reference, retrieved by simple recursion on getParent().
Object	put(Object key, Object value)
protected void	stop() Allows #stop to easily trigger the proper StopCommand for this scope.

Methods inherited from class java.util.AbstractMap

clear, clone, containsKey, containsValue, equals, hashCode, isEmpty, keySet, putAll, remove, size, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

owner

protected final Object owner

Constructor Detail

Scope

public Scope(Object owner,
             Object previous)

Method Detail

entrySet

public Set entrySet()

get

public Object get(Object key)

put

public Object put(Object key,
                  Object value)

stop

protected void stop()

Allows #stop to easily trigger the proper StopCommand for this scope.

getDepth

protected int getDepth()

Returns the number of control arguments of this type that are stacked up. This is the distance between this instance and the topmost instance, plus one. This value will never be negative or zero.

getTopmost

public Scope getTopmost()

Returns the topmost parent control reference, retrieved by simple recursion on getParent().

getParent

public Scope getParent()

Returns the parent control reference overridden by the placement of this instance in the context.

getReplaced

public Object getReplaced()

Returns the user's context reference overridden by the placement of this instance in the context. If there was none (as is hoped), then this will return null. This never returns parent controls; those are returned by getParent().

getInfo

public Scope.Info getInfo()

Returns info about the current scope for debugging purposes.