org.apache.velocity.context
Class InternalContextBase

java.lang.Object
  |
  +--org.apache.velocity.context.InternalContextBase

All Implemented Interfaces:

InternalEventContext, InternalHousekeepingContext, java.io.Serializable

Direct Known Subclasses:

AbstractContext

class InternalContextBase

extends java.lang.Object

implements InternalHousekeepingContext, InternalEventContext, java.io.Serializable

class to encapsulate the 'stuff' for internal operation of velocity. We use the context as a thread-safe storage : we take advantage of the fact that it's a visitor of sorts to all nodes (that matter) of the AST during init() and render(). Currently, it carries the template name for namespace support, as well as node-local context data introspection caching. Note that this is not a public class. It is for package access only to keep application code from accessing the internals, as AbstractContext is derived from this.

Version:

$Id: InternalContextBase.java,v 1.8 2001/05/20 19:44:34 geirm Exp $

Author:

Geir Magnusson Jr.

See Also:

Serialized Form

Field Summary

private Resource	currentResource Current resource - used for carrying encoding and other information down into the rendering process
private EventCartridge	eventCartridge EventCartridge we are to carry.
private java.util.HashMap	introspectionCache cache for node/context specific introspection information
private java.util.Stack	templateNameStack Template name stack.

Constructor Summary

(package private)

InternalContextBase()

Method Summary

EventCartridge	attachEventCartridge(EventCartridge ec)
Resource	getCurrentResource() temporary fix to enable #include() to figure out current encoding.
java.lang.String	getCurrentTemplateName() get the current template name
EventCartridge	getEventCartridge()
java.lang.Object[]	getTemplateNameStack() get the current template name stack
IntrospectionCacheData	icacheGet(java.lang.Object key) returns an IntrospectionCache Data (@see IntrospectionCacheData) object if exists for the key
void	icachePut(java.lang.Object key, IntrospectionCacheData o) places an IntrospectionCache Data (@see IntrospectionCacheData) element in the cache for specified key
void	popCurrentTemplateName() remove the current template name from stack
void	pushCurrentTemplateName(java.lang.String s) set the current template name on top of stack
void	setCurrentResource(Resource r)

Methods inherited from class java.lang.Object

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

Field Detail

introspectionCache

private java.util.HashMap introspectionCache

cache for node/context specific introspection information

templateNameStack

private java.util.Stack templateNameStack

Template name stack. The stack top contains the current template name.

eventCartridge

private EventCartridge eventCartridge

EventCartridge we are to carry. Set by application

currentResource

private Resource currentResource

Current resource - used for carrying encoding and other information down into the rendering process

Constructor Detail

InternalContextBase

InternalContextBase()

Method Detail

pushCurrentTemplateName

public void pushCurrentTemplateName(java.lang.String s)

set the current template name on top of stack

Specified by:

pushCurrentTemplateName in interface InternalHousekeepingContext

Parameters:

s - current template name

popCurrentTemplateName

public void popCurrentTemplateName()

remove the current template name from stack

Specified by:

popCurrentTemplateName in interface InternalHousekeepingContext

getCurrentTemplateName

public java.lang.String getCurrentTemplateName()

get the current template name

Specified by:

getCurrentTemplateName in interface InternalHousekeepingContext

Returns:

String current template name

getTemplateNameStack

public java.lang.Object[] getTemplateNameStack()

get the current template name stack

Specified by:

getTemplateNameStack in interface InternalHousekeepingContext

Returns:

Object[] with the template name stack contents.

icacheGet

public IntrospectionCacheData icacheGet(java.lang.Object key)

returns an IntrospectionCache Data (@see IntrospectionCacheData) object if exists for the key

Specified by:

icacheGet in interface InternalHousekeepingContext

Parameters:

key - key to find in cache

Returns:

cache object

icachePut

public void icachePut(java.lang.Object key,
                      IntrospectionCacheData o)

places an IntrospectionCache Data (@see IntrospectionCacheData) element in the cache for specified key

Specified by:

icachePut in interface InternalHousekeepingContext

Parameters:

key - key

o - IntrospectionCacheData object to place in cache

setCurrentResource

public void setCurrentResource(Resource r)

Specified by:

setCurrentResource in interface InternalHousekeepingContext

getCurrentResource

public Resource getCurrentResource()

Description copied from interface: InternalHousekeepingContext

temporary fix to enable #include() to figure out current encoding.

Specified by:

getCurrentResource in interface InternalHousekeepingContext

attachEventCartridge

public EventCartridge attachEventCartridge(EventCartridge ec)

Specified by:

attachEventCartridge in interface InternalEventContext

getEventCartridge

public EventCartridge getEventCartridge()

Specified by:

getEventCartridge in interface InternalEventContext