metadone.client.grasyla2.generic.IfEngine Class Reference

Inheritance diagram for metadone.client.grasyla2.generic.IfEngine:

Collaboration diagram for metadone.client.grasyla2.generic.IfEngine:

List of all members.

Public Member Functions
	IfEngine (GrasylaContext context, ConcreteObject expression, Engine parent) throws BadPreCondition
Protected Member Functions
boolean	isNativeAttribute (String name)
void	notifyChildChanged (Engine child, ChildComponent comp)
Package Functions
protected< C > Component <?extends C >	buildNewComponent (Class< C > clComp) throws BadPreCondition
private< C > Component<?extends C >	evaluate (Class< C > clComp) throws BadPreCondition
private< C > Component<?extends C >	evaluateSimple (Class< C > clComp, int skipCount) throws BadPreCondition
private< C > Component<?extends C >	rebuildAll (Class< C > clComp) throws BadPreCondition
Private Member Functions
void	rebuildSingle (Engine child, ChildComponent comp, Class<?> cl) throws BadPreCondition
Private Attributes
boolean	all = false
volatile boolean	evaluating
volatile int	trueIndex
Static Private Attributes
static final String	ATTR_ALL = "all"

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Detailed Description

A conditional engine.

Attributes

• all (native): Boolean

Contents

Should be GuardEngines. If the indicator GuardEngine#FALSE_INDICATOR is not present in the child component, it means that is has been evaluated to true. It means that other components than guard are true by default, however a guard without a condition should be used in such case.

Result

There are two cases; when building the `all` attribute is evaluated only once. If `all` is true: all the guards are evaluated and true guards are concatenated to build the result. Otherwise, only the component of the first true guard is returned. In the later case, guards that are after the currently true guard are not activated nor evaluated which allows a more lazy approach.

Author:

kma

See also:

GuardEngine

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Constructor & Destructor Documentation

metadone.client.grasyla2.generic.IfEngine.IfEngine	(	GrasylaContext	context,
		ConcreteObject	expression,
		Engine	parent
	)		throws BadPreCondition

Initializes this engine.

Parameters:

context	The context
expression	The expression
parent	The parent or null

Exceptions:

BadPreCondition

References metadone.client.grasyla2.GrasylaEngine.context, metadone.client.grasyla2.GrasylaEngine.expression, and metadone.client.grasyla2.GrasylaEngine.parent.

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Member Function Documentation

protected<C> Component<? extends C> metadone.client.grasyla2.generic.IfEngine.buildNewComponent

(

Class< C >

clComp

)

throws BadPreCondition [package, virtual]

Builds a new component.

Parameters:

<C>	The type
clComp	The class

Returns:

The new component

Exceptions:

BadPreCondition

Implements metadone.client.grasyla2.GrasylaEngine.

References metadone.client.grasyla2.generic.IfEngine.all, metadone.client.grasyla2.generic.IfEngine.ATTR_ALL, metadone.client.grasyla2.GrasylaEngine.buildChild(), metadone.client.grasyla2.generic.IfEngine.evaluate(), metadone.client.grasyla2.GrasylaEngine.getAttributes(), and metadone.client.grasyla2.GrasylaEngine.getContext().

private<C> Component<? extends C> metadone.client.grasyla2.generic.IfEngine.evaluate

(

Class< C >

clComp

)

throws BadPreCondition [package]

References metadone.client.grasyla2.generic.IfEngine.all, metadone.client.grasyla2.GrasylaEngine.buildChild(), metadone.client.grasyla2.GrasylaEngine.clearChildrenExpressions(), metadone.client.grasyla2.generic.IfEngine.evaluateSimple(), metadone.client.grasyla2.generic.IfEngine.evaluating, metadone.client.grasyla2.GrasylaEngine.getContainedExpressions(), metadone.client.grasyla2.GrasylaEngine.getContext(), and metadone.client.grasyla2.generic.IfEngine.rebuildAll().

Referenced by metadone.client.grasyla2.generic.IfEngine.buildNewComponent(), and metadone.client.grasyla2.generic.IfEngine.notifyChildChanged().

private<C> Component<? extends C> metadone.client.grasyla2.generic.IfEngine.evaluateSimple	(	Class< C >	clComp,
		int	skipCount
	)		throws BadPreCondition [package]

References metadone.client.grasyla2.GrasylaEngine.buildChild(), metadone.client.grasyla2.generic.GuardEngine.FALSE_INDICATOR, metadone.client.grasyla2.GrasylaEngine.getContainedExpressions(), metadone.client.grasyla2.GrasylaEngine.getContext(), and metadone.client.grasyla2.generic.IfEngine.trueIndex.

Referenced by metadone.client.grasyla2.generic.IfEngine.evaluate(), and metadone.client.grasyla2.generic.IfEngine.rebuildSingle().

boolean metadone.client.grasyla2.generic.IfEngine.isNativeAttribute

(

String

name

)

[protected]

Indicates whether an attribute is handled when building the component.

In other words, a native attribute should not be handled by an attribute handler.

Parameters:

name	The name of the attribute

Returns:

true if name is a native attribute

Reimplemented from metadone.client.grasyla2.GrasylaEngine.

References metadone.client.grasyla2.generic.IfEngine.ATTR_ALL.

void metadone.client.grasyla2.generic.IfEngine.notifyChildChanged	(	Engine	child,
		ChildComponent	comp
	)		[protected]

Reimplemented from metadone.client.grasyla2.GrasylaEngine.

References metadone.client.grasyla2.generic.IfEngine.all, metadone.client.grasyla2.generic.IfEngine.ATTR_ALL, metadone.client.grasyla2.GrasylaEngine.building, metadone.client.grasyla2.generic.IfEngine.evaluate(), metadone.client.grasyla2.generic.IfEngine.evaluating, metadone.client.grasyla2.GrasylaEngine.ChildComponent.getAttribute(), metadone.client.grasyla2.GrasylaEngine.ChildComponent.getComponent(), metadone.client.grasyla2.GrasylaEngine.getComponent(), metadone.client.grasyla2.GrasylaEngine.getState(), metadone.client.grasyla2.GrasylaEngine.ChildComponent.isAttribute(), metadone.client.grasyla2.GrasylaEngine.logger, metadone.client.grasyla2.generic.IfEngine.rebuildAll(), metadone.client.grasyla2.generic.IfEngine.rebuildSingle(), and metadone.client.grasyla2.GrasylaEngine.updateComponent().

private<C> Component<? extends C> metadone.client.grasyla2.generic.IfEngine.rebuildAll

(

Class< C >

clComp

)

throws BadPreCondition [package]

References metadone.client.grasyla2.GrasylaEngine.getChildComponent(), metadone.client.grasyla2.GrasylaEngine.getChildren(), metadone.client.grasyla2.GrasylaEngine.ChildComponent.getComponent(), and metadone.client.grasyla2.GrasylaEngine.ChildComponent.isAttribute().

Referenced by metadone.client.grasyla2.generic.IfEngine.evaluate(), and metadone.client.grasyla2.generic.IfEngine.notifyChildChanged().

void metadone.client.grasyla2.generic.IfEngine.rebuildSingle	(	Engine	child,
		ChildComponent	comp,
		Class<?>	cl
	)		throws BadPreCondition [private]

References metadone.client.grasyla2.generic.IfEngine.evaluateSimple(), metadone.client.grasyla2.generic.GuardEngine.FALSE_INDICATOR, metadone.client.grasyla2.GrasylaEngine.findIndex(), metadone.client.grasyla2.GrasylaEngine.getChildComponent(), metadone.client.grasyla2.GrasylaEngine.getChildren(), metadone.client.grasyla2.GrasylaEngine.ChildComponent.isAttribute(), metadone.client.grasyla2.GrasylaEngine.logger, metadone.client.grasyla2.GrasylaEngine.removeChild(), metadone.client.grasyla2.generic.IfEngine.trueIndex, and metadone.client.grasyla2.GrasylaEngine.updateComponent().

Referenced by metadone.client.grasyla2.generic.IfEngine.notifyChildChanged().

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Member Data Documentation

boolean metadone.client.grasyla2.generic.IfEngine.all = false [private]

Referenced by metadone.client.grasyla2.generic.IfEngine.buildNewComponent(), metadone.client.grasyla2.generic.IfEngine.evaluate(), and metadone.client.grasyla2.generic.IfEngine.notifyChildChanged().

final String metadone.client.grasyla2.generic.IfEngine.ATTR_ALL = "all" [static, private]

Referenced by metadone.client.grasyla2.generic.IfEngine.buildNewComponent(), metadone.client.grasyla2.generic.IfEngine.isNativeAttribute(), and metadone.client.grasyla2.generic.IfEngine.notifyChildChanged().

volatile boolean metadone.client.grasyla2.generic.IfEngine.evaluating [private]

Referenced by metadone.client.grasyla2.generic.IfEngine.evaluate(), and metadone.client.grasyla2.generic.IfEngine.notifyChildChanged().

volatile int metadone.client.grasyla2.generic.IfEngine.trueIndex [private]

Referenced by metadone.client.grasyla2.generic.IfEngine.evaluateSimple(), and metadone.client.grasyla2.generic.IfEngine.rebuildSingle().

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The documentation for this class was generated from the following file:

• metadone_bundle_client/src/metadone/client/grasyla2/generic/IfEngine.java