wt.rule.init
Class StandardInitRuleEvalService

java.lang.Object
  wt.services.StandardManager
      wt.rule.init.StandardInitRuleEvalService

All Implemented Interfaces:

InitRuleEvalService, Manager, NetFactor, Serializable

public class StandardInitRuleEvalService

extends StandardManager

implements InitRuleEvalService, Serializable

Use the newStandardInitRuleEvalService static factory method(s), not the StandardInitRuleEvalService constructor, to construct instances of this class. Instances must be constructed using the static factory(s), in order to ensure proper initialization of the instance.

Supported API: false

Extendable: false

See Also:

Serialized Form

Nested Class Summary

static class

StandardInitRuleEvalService.Cache A cache for parsed rules.

Field Summary

private static CacheManager	_cache
private static String	CLASSNAME
private static InitRuleEvaluator	EVALUATOR the utility that supports evaluating INIT rules
private static String	EVALUATOR_DEFAULT
private static String	EVALUATOR_PROP
private static String	RESOURCE

Fields inherited from class wt.services.StandardManager

Fields inherited from interface wt.services.Manager

MANAGER_SERVICE, STARTUP_AUTOMATIC, STARTUP_MANUAL, STATUS_EMERGENCY_SHUTDOWN, STATUS_EMERGENCY_SHUTTING_DOWN, STATUS_SHUTDOWN, STATUS_SHUTDOWN_ERRORS, STATUS_SHUTDOWN_FAILURE, STATUS_SHUTTING_DOWN, STATUS_STARTED, STATUS_STARTED_ERRORS, STATUS_STARTING_UP, STATUS_STARTUP_FAILURE

Constructor Summary

StandardInitRuleEvalService()

Method Summary

private static void	createCache() Create the CacheManager that this service uses to cache parsed rules.
AttributeValues	getAttributeValues(Rule rule) Return the attribute values specification that results from parsing the rule.
private static CacheManager	getCache() Return the CacheManager that is used by this service.
String	getConceptualClassname() Deprecated.
private AttributeValues	getParsedRule(RuleCacheKey key) Query the cache using the specified key.
Object	getValue(AlgoValue value, Object object, WTContainerRef container) Calculate the value using the specified algorithm and arguments.
Object	getValue(Attr attr, Object object) Get the value of the specified attribute from the specified object.
Object	getValue(String id, Object object, WTContainerRef container) Calculate the value for the attribute with the specified id for the specified object and container.
static StandardInitRuleEvalService	newStandardInitRuleEvalService() Default factory for the class.
private void	putParsedRule(RuleCacheKey key, AttributeValues parsedRule) Put the parsed rule in the cache.

Methods inherited from class wt.services.StandardManager

emergencyShutdown, emergencyShutdownComplete, emergencyShuttingDown, getClassInfo, getManagerService, getManagerStatus, getName, getStartupType, init, initialize, initialize, isStarted, newStandardManager, newStandardManager, performEmergencyShutdownProcess, performShutdownProcess, performStartupProcess, registerEvents, setManagerService, shutdown, shutdownFailure, shutdownSuccess, shuttingDown, started, startedErrors, startingUp, startup, startupFailure, toString

Methods inherited from class java.lang.Object

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

Field Detail

RESOURCE

private static final String RESOURCE

See Also:

Constant Field Values

CLASSNAME

private static final String CLASSNAME

EVALUATOR

private static final InitRuleEvaluator EVALUATOR

the utility that supports evaluating INIT rules

EVALUATOR_PROP

private static final String EVALUATOR_PROP

See Also:

Constant Field Values

EVALUATOR_DEFAULT

private static final String EVALUATOR_DEFAULT

See Also:

Constant Field Values

_cache

private static CacheManager _cache

Constructor Detail

StandardInitRuleEvalService

public StandardInitRuleEvalService()

Method Detail

getConceptualClassname

public String getConceptualClassname()

Deprecated.

Returns the conceptual (modeled) name for the class.

Supported API: false

Specified by:

getConceptualClassname in interface NetFactor

Overrides:

getConceptualClassname in class StandardManager

Returns:

String

newStandardInitRuleEvalService

public static StandardInitRuleEvalService newStandardInitRuleEvalService()
                                                                  throws WTException

Default factory for the class.

Supported API: false

Returns:

StandardInitRuleEvalService

Throws:

WTException

getAttributeValues

public AttributeValues getAttributeValues(Rule rule)
                                   throws WTException

Return the attribute values specification that results from parsing the rule.

Supported API: false

Specified by:

getAttributeValues in interface InitRuleEvalService

Parameters:

rule -

Returns:

AttributeValues

Throws:

WTException

getValue

public Object getValue(String id,
                       Object object,
                       WTContainerRef container)
                throws WTException

Calculate the value for the attribute with the specified id for the specified object and container.

The object argument may be a type identifier or a normal object. A type identifier is one of the following:

• Class
• TypeIdentifier
• String specifying the name of the type

If a type identifier is passed in, then the attribute value is calculated using default values for any attributes referenced by the INIT rule. Otherwise, attribute values from the object are used.

Supported API: false

Specified by:

getValue in interface InitRuleEvalService

Parameters:

id - the logical identifier of the attribute

object - the object to use for attribute references or a type identifier

container - the container to use for data lookups

Returns:

Object

Throws:

WTException

getValue

public Object getValue(AlgoValue value,
                       Object object,
                       WTContainerRef container)
                throws WTException

Calculate the value using the specified algorithm and arguments.

The object argument may be a type identifier or a normal object. A type identifier is one of the following:

• Class
• TypeIdentifier
• String specifying the name of the type

If a type identifier is passed in, then the attribute value is calculated using default values for any attributes referenced while computing the attribute value. Otherwise, attribute values from the object are used.

Supported API: false

Specified by:

getValue in interface InitRuleEvalService

Parameters:

value - the value to be calculated

object - the object to use for attribute references or a type identifier

container - the container to use for data lookups

Returns:

Object

Throws:

WTException

getValue

public Object getValue(Attr attr,
                       Object object)
                throws WTException

Get the value of the specified attribute from the specified object.

The object argument may be a type identifier or a normal object. A type identifier is one of the following:

• Class
• TypeIdentifier
• String specifying the name of the type

If a type identifier is passed in, then the default value for the attribute is returned. Otherwise, the value is obtained from the object.

Supported API: false

Specified by:

getValue in interface InitRuleEvalService

Parameters:

attr - the attribute to get

object - the object to get the value from or a type identifier

Returns:

Object

Throws:

WTException

getParsedRule

private AttributeValues getParsedRule(RuleCacheKey key)

Query the cache using the specified key.

putParsedRule

private void putParsedRule(RuleCacheKey key,
                           AttributeValues parsedRule)

Put the parsed rule in the cache.

getCache

private static CacheManager getCache()

Return the CacheManager that is used by this service.

If the cache doesn't exist, createCache is called to create the cache.

createCache

private static void createCache()

Create the CacheManager that this service uses to cache parsed rules.

A new cache is created only if one has not already been created. If a new cache is created, it is added to the RuleService to be managed.

This method is synchronized to prevent multiple caches from being created and added to the rule service.