org.drools.rule
Class GroupElement

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

All Implemented Interfaces:

Externalizable, Serializable, Cloneable, RuleConditionElement, RuleComponent

public class GroupElement
extends ConditionalElement
implements Externalizable

See Also:

Serialized Form

Nested Class Summary

static class

GroupElement.Type A public enum 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()
ObjectType	getForallBaseObjectType()
Map	getInnerDeclarations() Returns a Map of declarations that are visible inside this conditional element
List	getNestedElements() Returs a list of RuleConditionElement's that are nested inside the current element
Map<String,Declaration>	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()
boolean	isPatternScopeDelimiter() Returns true in case this RuleConditionElement delimits a pattern visibility scope.
boolean	isRoot()
void	pack() Optimize the group element subtree by removing redundancies like an AND inside another AND, OR inside OR, single branches AND/OR, etc.
void	pack(GroupElement parent)
void	readExternal(ObjectInput in)
Declaration	resolveDeclaration(String identifier) Resolves the given identifier in the current scope and returns the Declaration object for the declaration.
void	setForallBaseObjectType(ObjectType objectType)
void	setRoot(boolean root)
void	setType(GroupElement.Type type)
String	toString()
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

AND

public static final GroupElement.Type AND

OR

public static final GroupElement.Type OR

NOT

public static final GroupElement.Type NOT

EXISTS

public static final GroupElement.Type EXISTS

Constructor Detail

GroupElement

public GroupElement()

GroupElement

public GroupElement(GroupElement.Type type)

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

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 -

addChild

public void addChild(int index,
                     RuleConditionElement rce)

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

Parameters:

index -

rce -

getChildren

public List getChildren()

getInnerDeclarations

public Map getInnerDeclarations()

Description copied from interface: RuleConditionElement

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

Specified by:

getInnerDeclarations in interface RuleConditionElement

Returns:

getOuterDeclarations

public Map<String,Declaration> getOuterDeclarations()

Description copied from interface: RuleConditionElement

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

Specified by:

getOuterDeclarations in interface RuleConditionElement

Returns:

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.

Specified by:

resolveDeclaration in interface RuleConditionElement

Returns:

setForallBaseObjectType

public void setForallBaseObjectType(ObjectType objectType)

getForallBaseObjectType

public ObjectType getForallBaseObjectType()

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

pack

public void pack(GroupElement parent)

Parameters:

parent -

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:

hashCode

public int hashCode()

Overrides:

hashCode in class Object

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:

getType

public GroupElement.Type getType()

setType

public void setType(GroupElement.Type type)

isAnd

public boolean isAnd()

isOr

public boolean isOr()

isNot

public boolean isNot()

isExists

public boolean isExists()

toString

public String toString()

Overrides:

toString in class Object

getNestedElements

public List getNestedElements()

Description copied from interface: RuleConditionElement

Returs a list of RuleConditionElement's that are nested inside the current element

Specified by:

getNestedElements in interface RuleConditionElement

Returns:

isPatternScopeDelimiter

public boolean isPatternScopeDelimiter()

Description copied from interface: RuleConditionElement

Returns true in case this RuleConditionElement delimits a pattern visibility scope. For instance, AND CE is not a scope delimiter, while NOT CE is a scope delimiter

Specified by:

isPatternScopeDelimiter in interface RuleConditionElement

Returns:

isRoot

public boolean isRoot()

setRoot

public void setRoot(boolean root)