org.apache.velocity.runtime
Class RuntimeInstance

java.lang.Object
  org.apache.velocity.runtime.RuntimeInstance

All Implemented Interfaces:

RuntimeConstants, RuntimeLogger, RuntimeServices

public class RuntimeInstance
extends Object
implements RuntimeConstants, RuntimeServices

This is the Runtime system for Velocity. It is the single access point for all functionality in Velocity. It adheres to the mediator pattern and is the only structure that developers need to be familiar with in order to get Velocity to perform. The Runtime will also cooperate with external systems like Turbine. Runtime properties can set and then the Runtime is initialized. Turbine, for example, knows where the templates are to be loaded from, and where the Velocity log file should be placed. So in the case of Velocity cooperating with Turbine the code might look something like the following:

 ri.setProperty(Runtime.FILE_RESOURCE_LOADER_PATH, templatePath);
 ri.setProperty(Runtime.RUNTIME_LOG, pathToVelocityLog);
 ri.init();
 

 -----------------------------------------------------------------------
 N O T E S  O N  R U N T I M E  I N I T I A L I Z A T I O N
 -----------------------------------------------------------------------
 init()

 If init() is called by itself the RuntimeInstance will initialize
 with a set of default values.
 -----------------------------------------------------------------------
 init(String/Properties)

 In this case the default velocity properties are layed down
 first to provide a solid base, then any properties provided
 in the given properties object will override the corresponding
 default property.
 -----------------------------------------------------------------------
 

Version:

$Id: RuntimeInstance.java 703049 2008-10-09 03:18:58Z nbubna $

Author:

Jason van Zyl, Jeff Bowden, Geir Magusson Jr.

Field Summary

Fields inherited from interface org.apache.velocity.runtime.RuntimeConstants

COUNTER_INITIAL_VALUE, COUNTER_NAME, DEBUG_PREFIX, DEFAULT_RUNTIME_DIRECTIVES, DEFAULT_RUNTIME_PROPERTIES, DEFINE_DIRECTIVE_MAXDEPTH, ENCODING_DEFAULT, ERROR_PREFIX, ERRORMSG_END, ERRORMSG_START, EVALUATE_CONTEXT_CLASS, EVENTHANDLER_INCLUDE, EVENTHANDLER_INVALIDREFERENCES, EVENTHANDLER_METHODEXCEPTION, EVENTHANDLER_NULLSET, EVENTHANDLER_REFERENCEINSERTION, FILE_RESOURCE_LOADER_CACHE, FILE_RESOURCE_LOADER_PATH, HAS_NEXT_NAME, INFO_PREFIX, INPUT_ENCODING, INTERPOLATE_STRINGLITERALS, INTROSPECTOR_RESTRICT_CLASSES, INTROSPECTOR_RESTRICT_PACKAGES, MAX_NUMBER_LOOPS, NUMBER_OF_PARSERS, OUTPUT_ENCODING, PARSE_DIRECTIVE_MAXDEPTH, PARSER_POOL_CLASS, PARSER_POOL_SIZE, RESOURCE_LOADER, RESOURCE_MANAGER_CACHE_CLASS, RESOURCE_MANAGER_CLASS, RESOURCE_MANAGER_DEFAULTCACHE_SIZE, RESOURCE_MANAGER_LOGWHENFOUND, RUNTIME_LOG, RUNTIME_LOG_ERROR_STACKTRACE, RUNTIME_LOG_INFO_STACKTRACE, RUNTIME_LOG_LOGSYSTEM, RUNTIME_LOG_LOGSYSTEM_CLASS, RUNTIME_LOG_REFERENCE_LOG_INVALID, RUNTIME_LOG_WARN_STACKTRACE, RUNTIME_REFERENCES_STRICT, SET_NULL_ALLOWED, SKIP_INVALID_ITERATOR, STRICT_MATH, TRACE_PREFIX, UBERSPECT_CLASSNAME, UNKNOWN_PREFIX, VM_ARGUMENTS_STRICT, VM_CONTEXT_LOCALSCOPE, VM_LIBRARY, VM_LIBRARY_AUTORELOAD, VM_LIBRARY_DEFAULT, VM_MAX_DEPTH, VM_MESSAGES_ON, VM_PERM_ALLOW_INLINE, VM_PERM_ALLOW_INLINE_REPLACE_GLOBAL, VM_PERM_INLINE_LOCAL, WARN_PREFIX

Constructor Summary

RuntimeInstance()
Creates a new RuntimeInstance object.

Method Summary

void	addDirective(Directive directive) Programatically add a directive.
void	addProperty(String key, Object value) Add a property to the configuration.
boolean	addVelocimacro(String name, Node macro, String[] argArray, String sourceTemplate) Adds a new Velocimacro.
boolean	addVelocimacro(String name, String macro, String[] argArray, String sourceTemplate) Deprecated. Use addVelocimacro(String, Node, String[], String) instead
void	clearProperty(String key) Clear the values pertaining to a particular property.
Parser	createNewParser() Returns a JavaCC generated Parser.
void	debug(Object message) Deprecated. Use getLog() and call debug() on it.
boolean	dumpVMNamespace(String namespace) tells the vmFactory to dump the specified namespace.
void	error(Object message) Deprecated. Use getLog() and call error() on it.
boolean	evaluate(Context context, Writer writer, String logTag, Reader reader) Renders the input reader using the context into the output writer.
boolean	evaluate(Context context, Writer out, String logTag, String instring) Renders the input string using the context into the output writer.
Object	getApplicationAttribute(Object key) Gets the application attribute for the given key
EventCartridge	getApplicationEventCartridge() Returns the event handlers for the application.
boolean	getBoolean(String key, boolean def) Boolean property accessor method to hide the configuration implementation.
ExtendedProperties	getConfiguration() Return the velocity runtime configuration object.
ContentResource	getContent(String name) Returns a static content resource from the resource manager.
ContentResource	getContent(String name, String encoding) Returns a static content resource from the resource manager.
Directive	getDirective(String name) Retrieve a previously instantiated directive.
int	getInt(String key) Int property accessor method to hide the configuration implementation.
int	getInt(String key, int defaultValue) Int property accessor method to hide the configuration implementation.
Introspector	getIntrospector() Return the Introspector for this instance
String	getLoaderNameForResource(String resourceName) Determines if a template exists and returns name of the loader that provides it.
Log	getLog() Returns a convenient Log instance that wraps the current LogChute.
Object	getProperty(String key) Allows an external caller to get a property.
String	getString(String key) String property accessor method to hide the configuration implementation
String	getString(String key, String defaultValue) String property accessor method with default to hide the configuration implementation.
Template	getTemplate(String name) Returns a Template from the resource manager.
Template	getTemplate(String name, String encoding) Returns a Template from the resource manager
Uberspect	getUberspect() Returns the Uberspect object for this Instance.
Directive	getVelocimacro(String vmName, String templateName) Returns the appropriate VelocimacroProxy object if vmName is a valid current Velocimacro.
Directive	getVelocimacro(String vmName, String templateName, String renderingTemplate) Returns the appropriate VelocimacroProxy object if vmName is a valid current Velocimacro.
void	info(Object message) Deprecated. Use getLog() and call info() on it.
void	init() This is the primary initialization method in the Velocity Runtime.
void	init(Properties p) Initialize the Velocity Runtime with a Properties object.
void	init(String configurationFile) Initialize the Velocity Runtime with the name of ExtendedProperties object.
boolean	invokeVelocimacro(String vmName, String logTag, String[] params, Context context, Writer writer) Invokes a currently registered Velocimacro with the params provided and places the rendered stream into the writer.
boolean	isInitialized() Returns true if the RuntimeInstance has been successfully initialized.
boolean	isVelocimacro(String vmName, String templateName) Checks to see if a VM exists
SimpleNode	parse(Reader reader, String templateName) Parse the input and return the root of AST node structure.
SimpleNode	parse(Reader reader, String templateName, boolean dumpNamespace) Parse the input and return the root of the AST node structure.
SimpleNode	parse(String string, String templateName) Parse the input and return the root of AST node structure.
void	removeDirective(String name) Remove a directive.
boolean	render(Context context, Writer writer, String logTag, SimpleNode nodeTree) Initializes and renders the AST SimpleNode using the context into the output writer.
Object	setApplicationAttribute(Object key, Object o) Sets the application attribute for the given key
void	setConfiguration(ExtendedProperties configuration) Allow an external system to set an ExtendedProperties object to use.
void	setProperty(String key, Object value) Allows an external system to set a property in the Velocity Runtime.
void	warn(Object message) Deprecated. Use getLog() and call warn() on it.

Methods inherited from class java.lang.Object

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

Constructor Detail

RuntimeInstance

public RuntimeInstance()

Creates a new RuntimeInstance object.

Method Detail

init

public void init()
          throws Exception

This is the primary initialization method in the Velocity Runtime. The systems that are setup/initialized here are as follows:

• Logging System
• ResourceManager
• EventHandler
• Parser Pool
• Global Cache
• Static Content Include System
• Velocimacro System

Specified by:

init in interface RuntimeServices

Throws:

Exception - When an error occured during initialization.

isInitialized

public boolean isInitialized()

Returns true if the RuntimeInstance has been successfully initialized.

Specified by:

isInitialized in interface RuntimeServices

Returns:

True if the RuntimeInstance has been successfully initialized.

Since:

1.5

setProperty

public void setProperty(String key,
                        Object value)

Allows an external system to set a property in the Velocity Runtime.

Specified by:

setProperty in interface RuntimeServices

Parameters:

key - property key

value - property value

setConfiguration

public void setConfiguration(ExtendedProperties configuration)

Allow an external system to set an ExtendedProperties object to use. This is useful where the external system also uses the ExtendedProperties class and the velocity configuration is a subset of parent application's configuration. This is the case with Turbine.

Specified by:

setConfiguration in interface RuntimeServices

Parameters:

configuration -

addProperty

public void addProperty(String key,
                        Object value)

Add a property to the configuration. If it already exists then the value stated here will be added to the configuration entry. For example, if resource.loader = file is already present in the configuration and you addProperty("resource.loader", "classpath") Then you will end up with a Vector like the following: ["file", "classpath"]

Specified by:

addProperty in interface RuntimeServices

Parameters:

key -

value -

clearProperty

public void clearProperty(String key)

Clear the values pertaining to a particular property.

Specified by:

clearProperty in interface RuntimeServices

Parameters:

key - of property to clear

getProperty

public Object getProperty(String key)

Allows an external caller to get a property. The calling routine is required to know the type, as this routine will return an Object, as that is what properties can be.

Specified by:

getProperty in interface RuntimeServices

Parameters:

key - property to return

Returns:

Value of the property or null if it does not exist.

init

public void init(Properties p)
          throws Exception

Initialize the Velocity Runtime with a Properties object.

Specified by:

init in interface RuntimeServices

Parameters:

p -

Throws:

Exception - When an error occurs during initialization.

init

public void init(String configurationFile)
          throws Exception

Initialize the Velocity Runtime with the name of ExtendedProperties object.

Specified by:

init in interface RuntimeServices

Parameters:

configurationFile -

Throws:

Exception - When an error occurs during initialization.

addDirective

public void addDirective(Directive directive)

Programatically add a directive.

Parameters:

directive -

getDirective

public Directive getDirective(String name)

Retrieve a previously instantiated directive.

Specified by:

getDirective in interface RuntimeServices

Parameters:

name - name of the directive

Returns:

the Directive for that name

removeDirective

public void removeDirective(String name)

Remove a directive.

Parameters:

name - name of the directive.

createNewParser

public Parser createNewParser()

Returns a JavaCC generated Parser.

Specified by:

createNewParser in interface RuntimeServices

Returns:

Parser javacc generated parser

parse

public SimpleNode parse(String string,
                        String templateName)
                 throws ParseException

Parse the input and return the root of AST node structure.

In the event that it runs out of parsers in the pool, it will create and let them be GC'd dynamically, logging that it has to do that. This is considered an exceptional condition. It is expected that the user will set the PARSER_POOL_SIZE property appropriately for their application. We will revisit this.

Specified by:

parse in interface RuntimeServices

Parameters:

string - String to be parsed

templateName - name of the template being parsed

Returns:

A root node representing the template as an AST tree.

Throws:

ParseException - When the string could not be parsed as a template.

Since:

1.6

parse

public SimpleNode parse(Reader reader,
                        String templateName)
                 throws ParseException

Parse the input and return the root of AST node structure.

In the event that it runs out of parsers in the pool, it will create and let them be GC'd dynamically, logging that it has to do that. This is considered an exceptional condition. It is expected that the user will set the PARSER_POOL_SIZE property appropriately for their application. We will revisit this.

Specified by:

parse in interface RuntimeServices

Parameters:

reader - Reader retrieved by a resource loader

templateName - name of the template being parsed

Returns:

A root node representing the template as an AST tree.

Throws:

ParseException - When the template could not be parsed.

parse

public SimpleNode parse(Reader reader,
                        String templateName,
                        boolean dumpNamespace)
                 throws ParseException

Parse the input and return the root of the AST node structure.

Specified by:

parse in interface RuntimeServices

Parameters:

reader - Reader retrieved by a resource loader

templateName - name of the template being parsed

dumpNamespace - flag to dump the Velocimacro namespace for this template

Returns:

A root node representing the template as an AST tree.

Throws:

ParseException - When the template could not be parsed.

evaluate

public boolean evaluate(Context context,
                        Writer out,
                        String logTag,
                        String instring)
                 throws IOException

Renders the input string using the context into the output writer. To be used when a template is dynamically constructed, or want to use Velocity as a token replacer.

Specified by:

evaluate in interface RuntimeServices

Parameters:

context - context to use in rendering input string

out - Writer in which to render the output

logTag - string to be used as the template name for log messages in case of error

instring - input string containing the VTL to be rendered

Returns:

true if successful, false otherwise. If false, see Velocity runtime log

Throws:

ParseErrorException - The template could not be parsed.

MethodInvocationException - A method on a context object could not be invoked.

ResourceNotFoundException - A referenced resource could not be loaded.

IOException - While rendering to the writer, an I/O problem occured.

Since:

Velocity 1.6

evaluate

public boolean evaluate(Context context,
                        Writer writer,
                        String logTag,
                        Reader reader)
                 throws IOException

Renders the input reader using the context into the output writer. To be used when a template is dynamically constructed, or want to use Velocity as a token replacer.

Specified by:

evaluate in interface RuntimeServices

Parameters:

context - context to use in rendering input string

writer - Writer in which to render the output

logTag - string to be used as the template name for log messages in case of error

reader - Reader containing the VTL to be rendered

Returns:

true if successful, false otherwise. If false, see Velocity runtime log

Throws:

ParseErrorException - The template could not be parsed.

MethodInvocationException - A method on a context object could not be invoked.

ResourceNotFoundException - A referenced resource could not be loaded.

IOException - While reading from the reader or rendering to the writer, an I/O problem occured.

Since:

Velocity 1.6

render

public boolean render(Context context,
                      Writer writer,
                      String logTag,
                      SimpleNode nodeTree)
               throws IOException

Initializes and renders the AST SimpleNode using the context into the output writer.

Parameters:

context - context to use in rendering input string

writer - Writer in which to render the output

logTag - string to be used as the template name for log messages in case of error

nodeTree - SimpleNode which is the root of the AST to be rendered

Returns:

true if successful, false otherwise. If false, see Velocity runtime log for errors

Throws:

ParseErrorException - The template could not be parsed.

MethodInvocationException - A method on a context object could not be invoked.

ResourceNotFoundException - A referenced resource could not be loaded.

IOException - While rendering to the writer, an I/O problem occured.

Since:

Velocity 1.6

invokeVelocimacro

public boolean invokeVelocimacro(String vmName,
                                 String logTag,
                                 String[] params,
                                 Context context,
                                 Writer writer)
                          throws IOException

Invokes a currently registered Velocimacro with the params provided and places the rendered stream into the writer.
Note : currently only accepts args to the VM if they are in the context.

Specified by:

invokeVelocimacro in interface RuntimeServices

Parameters:

vmName - name of Velocimacro to call

logTag - string to be used for template name in case of error. if null, the vmName will be used

params - keys for args used to invoke Velocimacro, in java format rather than VTL (eg "foo" or "bar" rather than "$foo" or "$bar")

context - Context object containing data/objects used for rendering.

writer - Writer for output stream

Returns:

true if Velocimacro exists and successfully invoked, false otherwise.

Throws:

IOException - While rendering to the writer, an I/O problem occured.

Since:

1.6

getTemplate

public Template getTemplate(String name)
                     throws ResourceNotFoundException,
                            ParseErrorException,
                            Exception

Returns a Template from the resource manager. This method assumes that the character encoding of the template is set by the input.encoding property. The default is "ISO-8859-1"

Specified by:

getTemplate in interface RuntimeServices

Parameters:

name - The file name of the desired template.

Returns:

The template.

Throws:

ResourceNotFoundException - if template not found from any available source.

ParseErrorException - if template cannot be parsed due to syntax (or other) error.

Exception - if an error occurs in template initialization

getTemplate

public Template getTemplate(String name,
                            String encoding)
                     throws ResourceNotFoundException,
                            ParseErrorException,
                            Exception

Returns a Template from the resource manager

Specified by:

getTemplate in interface RuntimeServices

Parameters:

name - The name of the desired template.

encoding - Character encoding of the template

Returns:

The template.

Throws:

ResourceNotFoundException - if template not found from any available source.

ParseErrorException - if template cannot be parsed due to syntax (or other) error.

Exception - if an error occurs in template initialization

getContent

public ContentResource getContent(String name)
                           throws ResourceNotFoundException,
                                  ParseErrorException,
                                  Exception

Returns a static content resource from the resource manager. Uses the current value if INPUT_ENCODING as the character encoding.

Specified by:

getContent in interface RuntimeServices

Parameters:

name - Name of content resource to get

Returns:

parsed ContentResource object ready for use

Throws:

ResourceNotFoundException - if template not found from any available source.

ParseErrorException - When the template could not be parsed.

Exception - Any other error.

getContent

public ContentResource getContent(String name,
                                  String encoding)
                           throws ResourceNotFoundException,
                                  ParseErrorException,
                                  Exception

Returns a static content resource from the resource manager.

Specified by:

getContent in interface RuntimeServices

Parameters:

name - Name of content resource to get

encoding - Character encoding to use

Returns:

parsed ContentResource object ready for use

Throws:

ResourceNotFoundException - if template not found from any available source.

ParseErrorException - When the template could not be parsed.

Exception - Any other error.

getLoaderNameForResource

public String getLoaderNameForResource(String resourceName)

Determines if a template exists and returns name of the loader that provides it. This is a slightly less hokey way to support the Velocity.resourceExists() utility method, which was broken when per-template encoding was introduced. We can revisit this.

Specified by:

getLoaderNameForResource in interface RuntimeServices

Parameters:

resourceName - Name of template or content resource

Returns:

class name of loader than can provide it

getLog

public Log getLog()

Returns a convenient Log instance that wraps the current LogChute. Use this to log error messages. It has the usual methods.

Specified by:

getLog in interface RuntimeServices

Returns:

A convenience Log instance that wraps the current LogChute.

Since:

1.5

warn

public void warn(Object message)

Deprecated. Use getLog() and call warn() on it.

Specified by:

warn in interface RuntimeLogger

Parameters:

message - The message to log.

See Also:

Log.warn(Object)

info

public void info(Object message)

Deprecated. Use getLog() and call info() on it.

Specified by:

info in interface RuntimeLogger

Parameters:

message - The message to log.

See Also:

Log.info(Object)

error

public void error(Object message)

Deprecated. Use getLog() and call error() on it.

Specified by:

error in interface RuntimeLogger

Parameters:

message - The message to log.

See Also:

Log.error(Object)

debug

public void debug(Object message)

Deprecated. Use getLog() and call debug() on it.

Specified by:

debug in interface RuntimeLogger

Parameters:

message - The message to log.

See Also:

Log.debug(Object)

getString

public String getString(String key,
                        String defaultValue)

String property accessor method with default to hide the configuration implementation.

Specified by:

getString in interface RuntimeServices

Parameters:

key - property key

defaultValue - default value to return if key not found in resource manager.

Returns:

value of key or default

getVelocimacro

public Directive getVelocimacro(String vmName,
                                String templateName)

Returns the appropriate VelocimacroProxy object if vmName is a valid current Velocimacro.

Specified by:

getVelocimacro in interface RuntimeServices

Parameters:

vmName - Name of velocimacro requested

templateName - Name of the template that contains the velocimacro.

Returns:

The requested VelocimacroProxy.

Since:

1.6

getVelocimacro

public Directive getVelocimacro(String vmName,
                                String templateName,
                                String renderingTemplate)

Returns the appropriate VelocimacroProxy object if vmName is a valid current Velocimacro.

Specified by:

getVelocimacro in interface RuntimeServices

Parameters:

vmName - Name of velocimacro requested

templateName - Name of the namespace.

renderingTemplate - Name of the template we are currently rendering. This information is needed when VM_PERM_ALLOW_INLINE_REPLACE_GLOBAL setting is true and template contains a macro with the same name as the global macro library.

Returns:

VelocimacroProxy

Since:

Velocity 1.6

addVelocimacro

public boolean addVelocimacro(String name,
                              String macro,
                              String[] argArray,
                              String sourceTemplate)

Deprecated. Use addVelocimacro(String, Node, String[], String) instead

Adds a new Velocimacro. Usually called by Macro only while parsing.

Specified by:

addVelocimacro in interface RuntimeServices

Parameters:

name - Name of velocimacro

macro - String form of macro body

argArray - Array of strings, containing the #macro() arguments. the 0th is the name.

sourceTemplate - Name of the template that contains the velocimacro.

Returns:

True if added, false if rejected for some reason (either parameters or permission settings)

addVelocimacro

public boolean addVelocimacro(String name,
                              Node macro,
                              String[] argArray,
                              String sourceTemplate)

Adds a new Velocimacro. Usually called by Macro only while parsing. Called by org.apache.velocity.runtime.directive.processAndRegister

Specified by:

addVelocimacro in interface RuntimeServices

Parameters:

name - Name of velocimacro

macro - root AST node of the parsed macro

argArray - Array of strings, containing the #macro() arguments. the 0th is the name.

sourceTemplate -

Returns:

boolean True if added, false if rejected for some reason (either parameters or permission settings)

Since:

Velocity 1.6

isVelocimacro

public boolean isVelocimacro(String vmName,
                             String templateName)

Checks to see if a VM exists

Specified by:

isVelocimacro in interface RuntimeServices

Parameters:

vmName - Name of the Velocimacro.

templateName - Template on which to look for the Macro.

Returns:

True if VM by that name exists, false if not

dumpVMNamespace

public boolean dumpVMNamespace(String namespace)

tells the vmFactory to dump the specified namespace. This is to support clearing the VM list when in inline-VM-local-scope mode

Specified by:

dumpVMNamespace in interface RuntimeServices

Parameters:

namespace - Namespace to dump.

Returns:

True if namespace was dumped successfully.

getString

public String getString(String key)

String property accessor method to hide the configuration implementation

Specified by:

getString in interface RuntimeServices

Parameters:

key - property key

Returns:

value of key or null

getInt

public int getInt(String key)

Int property accessor method to hide the configuration implementation.

Specified by:

getInt in interface RuntimeServices

Parameters:

key - Property key

Returns:

value

getInt

public int getInt(String key,
                  int defaultValue)

Int property accessor method to hide the configuration implementation.

Specified by:

getInt in interface RuntimeServices

Parameters:

key - property key

defaultValue - The default value.

Returns:

value

getBoolean

public boolean getBoolean(String key,
                          boolean def)

Boolean property accessor method to hide the configuration implementation.

Specified by:

getBoolean in interface RuntimeServices

Parameters:

key - property key

def - The default value if property not found.

Returns:

value of key or default value

getConfiguration

public ExtendedProperties getConfiguration()

Return the velocity runtime configuration object.

Specified by:

getConfiguration in interface RuntimeServices

Returns:

Configuration object which houses the Velocity runtime properties.

getIntrospector

public Introspector getIntrospector()

Return the Introspector for this instance

Specified by:

getIntrospector in interface RuntimeServices

Returns:

The Introspector for this instance

getApplicationEventCartridge

public EventCartridge getApplicationEventCartridge()

Returns the event handlers for the application.

Specified by:

getApplicationEventCartridge in interface RuntimeServices

Returns:

The event handlers for the application.

Since:

1.5

getApplicationAttribute

public Object getApplicationAttribute(Object key)

Gets the application attribute for the given key

Specified by:

getApplicationAttribute in interface RuntimeServices

Parameters:

key -

Returns:

The application attribute for the given key.

setApplicationAttribute

public Object setApplicationAttribute(Object key,
                                      Object o)

Sets the application attribute for the given key

Specified by:

setApplicationAttribute in interface RuntimeServices

Parameters:

key -

o - The new application attribute.

Returns:

The old value of this attribute or null if it hasn't been set before.

getUberspect

public Uberspect getUberspect()

Returns the Uberspect object for this Instance.

Specified by:

getUberspect in interface RuntimeServices

Returns:

The Uberspect object for this Instance.