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GroupElement (Drools 4.0.0.11754MR2 API) - JBoss RULES 4.0.0.11754MR2 API 英文版文档

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org.drools.rule
Class GroupElement

java.lang.Object
  org.drools.rule.ConditionalElement
      org.drools.rule.GroupElement

All Implemented Interfaces:

Serializable, Cloneable, RuleConditionElement, RuleComponent

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public class GroupElement
extends ConditionalElement

See Also:

Serialized Form

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Nested Class Summary
static interface	GroupElement.Type           A public interface for CE types

 

Field Summary
static GroupElement.Type	AND
static GroupElement.Type	EXISTS
static GroupElement.Type	NOT
static GroupElement.Type	OR

 

Constructor Summary
GroupElement()
GroupElement(GroupElement.Type type)

 

Method Summary
void	addChild(int index, RuleConditionElement rce)           Adds the given child as the (index)th child of the this GroupElement
void	addChild(RuleConditionElement child)           Adds a child to the current GroupElement.
Object	clone()           Clones all Conditional Elements but references the non ConditionalElement children
boolean	equals(Object object)           Traverses two trees and checks that they are structurally equal at all levels
List	getChildren()
Map	getInnerDeclarations()           Returns a Map of declarations that are visible inside this conditional element
Map	getOuterDeclarations()           Returns a Map of declarations that are visible outside this conditional element.
GroupElement.Type	getType()
int	hashCode()
boolean	isAnd()
boolean	isExists()
boolean	isNot()
boolean	isOr()
void	pack()           Optimize the group element subtree by removing redundancies like an AND inside another AND, OR inside OR, single branches AND/OR, etc.
Declaration	resolveDeclaration(String identifier)           Resolves the given identifier in the current scope and returns the Declaration object for the declaration.
void	setType(GroupElement.Type type)
String	toString()

 

Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait

 

Field Detail

AND

public static final GroupElement.Type AND

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OR

public static final GroupElement.Type OR

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EXISTS

public static final GroupElement.Type EXISTS

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NOT

public static final GroupElement.Type NOT

Constructor Detail

GroupElement

public GroupElement()

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GroupElement

public GroupElement(GroupElement.Type type)

Method Detail

addChild

public void addChild(RuleConditionElement child)

Adds a child to the current GroupElement. Restrictions are: NOT/EXISTS: can have only one child, either a single Pattern or another CE

Parameters:

child -

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addChild

public void addChild(int index,
                     RuleConditionElement rce)

Adds the given child as the (index)th child of the this GroupElement

Parameters:

index -

rce -

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getChildren

public List getChildren()

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getInnerDeclarations

public Map getInnerDeclarations()

Description copied from interface: RuleConditionElement

Returns a Map of declarations that are visible inside this conditional element

Returns:

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getOuterDeclarations

public Map getOuterDeclarations()

Description copied from interface: RuleConditionElement

Returns a Map of declarations that are visible outside this conditional element.

Returns:

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resolveDeclaration

public Declaration resolveDeclaration(String identifier)

Description copied from interface: RuleConditionElement

Resolves the given identifier in the current scope and returns the Declaration object for the declaration. Returns null if identifier can not be resolved.

Returns:

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pack

public void pack()

Optimize the group element subtree by removing redundancies like an AND inside another AND, OR inside OR, single branches AND/OR, etc. LogicTransformer does further, more complicated, transformations

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equals

public boolean equals(Object object)

Traverses two trees and checks that they are structurally equal at all levels

Overrides:

equals in class Object

Parameters:

e1 -

e2 -

Returns:

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hashCode

public int hashCode()

Overrides:

hashCode in class Object

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clone

public Object clone()

Clones all Conditional Elements but references the non ConditionalElement children

Specified by:

clone in interface RuleConditionElement

Specified by:

clone in class ConditionalElement

Parameters:

e1 -

e2 -

Returns:

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getType

public GroupElement.Type getType()

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setType

public void setType(GroupElement.Type type)

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isAnd

public boolean isAnd()

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isOr

public boolean isOr()

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isNot

public boolean isNot()

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isExists

public boolean isExists()

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toString

public String toString()

Overrides:

toString in class Object

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