org.apache.velocity.context
Class ChainedInternalContextAdapter

java.lang.Object
  org.apache.velocity.context.ChainedInternalContextAdapter

All Implemented Interfaces:

Context, InternalContextAdapter, InternalEventContext, InternalWrapperContext

Direct Known Subclasses:

EvaluateContext, Foreach.NullHolderContext, ProxyVMContext

public abstract class ChainedInternalContextAdapter
extends Object
implements InternalContextAdapter

This is an abstract internal-use-only context implementation to be used as a subclass for other internal-use-only contexts that wrap other internal-use-only contexts. We use this context to make it easier to chain an existing context as part of a new context implementation. It just delegates everything to the inner/parent context. Subclasses then only need to override the methods relevant to them.

Since:

1.6

Version:

$Id: ChainedInternalContextAdapter.java 685724 2008-08-13 23:12:12Z nbubna $

Author:

Nathan Bubna

Field Summary

protected InternalContextAdapter

innerContext the parent context

Constructor Summary

ChainedInternalContextAdapter(InternalContextAdapter inner)
CTOR, wraps an ICA

Method Summary

EventCartridge	attachEventCartridge(EventCartridge ec)
boolean	containsKey(Object key) Indicates whether the specified key is in the context.
Object	get(String key) Retrieves from parent context.
InternalContextAdapter	getBaseContext() Returns the base full context impl.
int	getCurrentMacroCallDepth() get the current macro call depth
String	getCurrentMacroName() get the current macro name
Resource	getCurrentResource() temporary fix to enable #include() to figure out current encoding.
String	getCurrentTemplateName() get the current template name
EventCartridge	getEventCartridge()
Context	getInternalUserContext() Return the inner / user context.
Object[]	getKeys() Get all the keys for the values in the context.
List	getMacroLibraries() Get the macro library list for the current template.
Object[]	getMacroNameStack() Returns the macro name stack in form of an array.
Object[]	getTemplateNameStack() Returns the template name stack in form of an array.
IntrospectionCacheData	icacheGet(Object key) returns an IntrospectionCache Data (@see IntrospectionCacheData) object if exists for the key
void	icachePut(Object key, IntrospectionCacheData o) places an IntrospectionCache Data (@see IntrospectionCacheData) element in the cache for specified key
Object	localPut(String key, Object value) Allows callers to explicitly put objects in the local context.
void	popCurrentMacroName() remove the current macro name from stack
void	popCurrentTemplateName() remove the current template name from stack
void	pushCurrentMacroName(String s) set the current macro name on top of stack
void	pushCurrentTemplateName(String s) set the current template name on top of stack
Object	put(String key, Object value) Put method also stores values in parent context
Object	remove(Object key) Removes the value associated with the specified key from the context.
void	setCurrentResource(Resource r)
void	setMacroLibraries(List macroLibraries) Set the macro library list for the current template.

Methods inherited from class java.lang.Object

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

Field Detail

innerContext

protected InternalContextAdapter innerContext

the parent context

Constructor Detail

ChainedInternalContextAdapter

public ChainedInternalContextAdapter(InternalContextAdapter inner)

CTOR, wraps an ICA

Parameters:

inner - context

Method Detail

getInternalUserContext

public Context getInternalUserContext()

Return the inner / user context.

Specified by:

getInternalUserContext in interface InternalWrapperContext

Returns:

The inner / user context.

getBaseContext

public InternalContextAdapter getBaseContext()

Description copied from interface: InternalWrapperContext

Returns the base full context impl.

Specified by:

getBaseContext in interface InternalWrapperContext

Returns:

The base full context impl.

See Also:

InternalWrapperContext.getBaseContext()

get

public Object get(String key)

Retrieves from parent context.

Specified by:

get in interface Context

Parameters:

key - name of item to get

Returns:

stored object or null

put

public Object put(String key,
                  Object value)

Put method also stores values in parent context

Specified by:

put in interface Context

Parameters:

key - name of item to set

value - object to set to key

Returns:

old stored object

containsKey

public boolean containsKey(Object key)

Description copied from interface: Context

Indicates whether the specified key is in the context.

Specified by:

containsKey in interface Context

Parameters:

key - The key to look for.

Returns:

Whether the key is in the context.

See Also:

Context.containsKey(java.lang.Object)

getKeys

public Object[] getKeys()

Description copied from interface: Context

Get all the keys for the values in the context.

Specified by:

getKeys in interface Context

Returns:

All the keys for the values in the context.

See Also:

Context.getKeys()

remove

public Object remove(Object key)

Description copied from interface: Context

Removes the value associated with the specified key from the context.

Specified by:

remove in interface Context

Parameters:

key - The name of the value to remove.

Returns:

The value that the key was mapped to, or null if unmapped.

See Also:

Context.remove(java.lang.Object)

pushCurrentTemplateName

public void pushCurrentTemplateName(String s)

set the current template name on top of stack

Parameters:

s - current template name

See Also:

InternalHousekeepingContext.pushCurrentTemplateName(java.lang.String)

popCurrentTemplateName

public void popCurrentTemplateName()

remove the current template name from stack

See Also:

InternalHousekeepingContext.popCurrentTemplateName()

getCurrentTemplateName

public String getCurrentTemplateName()

get the current template name

Returns:

String current template name

See Also:

InternalHousekeepingContext.getCurrentTemplateName()

getTemplateNameStack

public Object[] getTemplateNameStack()

Returns the template name stack in form of an array.

Returns:

Object[] with the template name stack contents.

See Also:

InternalHousekeepingContext.getTemplateNameStack()

pushCurrentMacroName

public void pushCurrentMacroName(String s)

set the current macro name on top of stack

Parameters:

s - current macro name

See Also:

InternalHousekeepingContext.pushCurrentMacroName(java.lang.String)

popCurrentMacroName

public void popCurrentMacroName()

remove the current macro name from stack

See Also:

InternalHousekeepingContext.popCurrentMacroName()

getCurrentMacroName

public String getCurrentMacroName()

get the current macro name

Returns:

String current macro name

See Also:

InternalHousekeepingContext.getCurrentMacroName()

getCurrentMacroCallDepth

public int getCurrentMacroCallDepth()

get the current macro call depth

Returns:

int current macro call depth

See Also:

InternalHousekeepingContext.getCurrentMacroCallDepth()

getMacroNameStack

public Object[] getMacroNameStack()

Returns the macro name stack in form of an array.

Returns:

Object[] with the macro name stack contents.

See Also:

InternalHousekeepingContext.getMacroNameStack()

icacheGet

public IntrospectionCacheData icacheGet(Object key)

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

Parameters:

key - key to find in cache

Returns:

cache object

See Also:

InternalHousekeepingContext.icacheGet(java.lang.Object)

localPut

public Object localPut(String key,
                       Object value)

Description copied from interface: InternalWrapperContext

Allows callers to explicitly put objects in the local context. Objects added to the context through this method always end up in the top-level context of possible wrapped contexts.

Specified by:

localPut in interface InternalWrapperContext

Parameters:

key - name of item to set.

value - object to set to key.

Returns:

old stored object

See Also:

InternalWrapperContext.localPut(java.lang.String,java.lang.Object)

icachePut

public void icachePut(Object key,
                      IntrospectionCacheData o)

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

Parameters:

key - key

o - IntrospectionCacheData object to place in cache

See Also:

InternalHousekeepingContext.icachePut(java.lang.Object, org.apache.velocity.util.introspection.IntrospectionCacheData)

setMacroLibraries

public void setMacroLibraries(List macroLibraries)

Set the macro library list for the current template.

Parameters:

macroLibraries - list of macro libraries to set

See Also:

InternalHousekeepingContext.setMacroLibraries(List)

getMacroLibraries

public List getMacroLibraries()

Get the macro library list for the current template.

Returns:

List of macro library names

See Also:

InternalHousekeepingContext.getMacroLibraries()

attachEventCartridge

public EventCartridge attachEventCartridge(EventCartridge ec)

Specified by:

attachEventCartridge in interface InternalEventContext

Returns:

The old EventCartridge.

See Also:

InternalEventContext.attachEventCartridge(org.apache.velocity.app.event.EventCartridge)

getEventCartridge

public EventCartridge getEventCartridge()

Specified by:

getEventCartridge in interface InternalEventContext

Returns:

The current EventCartridge.

See Also:

InternalEventContext.getEventCartridge()

setCurrentResource

public void setCurrentResource(Resource r)

See Also:

InternalHousekeepingContext.setCurrentResource(org.apache.velocity.runtime.resource.Resource)

getCurrentResource

public Resource getCurrentResource()

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

Returns:

The current resource.

See Also:

InternalHousekeepingContext.getCurrentResource()