Package org.drools.base.rule

Class GroupElement

java.lang.Object

org.drools.base.rule.ConditionalElement

org.drools.base.rule.GroupElement

All Implemented Interfaces:

Externalizable, Serializable, Cloneable, RuleComponent, RuleConditionElement

public class GroupElement
extends ConditionalElement
implements Externalizable

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	GroupElement.Type	A public enum for CE types

Field Summary

Fields

Modifier and Type	Field	Description
static final GroupElement.Type	AND
static final GroupElement.Type	EXISTS
static final GroupElement.Type	NOT
static final GroupElement.Type	OR

Constructor Summary

Constructors

Constructor	Description
GroupElement()
GroupElement(GroupElement.Type type)

Method Summary

Modifier and Type	Method	Description
void	addChild(int index, RuleConditionElement rce)	Adds the given child as the (index)th child of the this GroupElement
GroupElement	addChild(RuleConditionElement child)	Adds a child to the current GroupElement.
GroupElement	clone()	Clones all Conditional Elements but references the non ConditionalElement children
protected GroupElement	clone(boolean deepClone)
GroupElement	cloneOnlyGroup()
boolean	containesNode(GroupElement.Type node)
boolean	equals(Object object)
List<RuleConditionElement>	getChildren()
Map<String,Declaration>	getInnerDeclarations()	Returns a Map of declarations that are visible inside this conditional element
Map<String,Declaration>	getInnerDeclarations(String consequenceName)
List<RuleConditionElement>	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.
Map<String,Declaration>	getOuterDeclarations(String consequenceName)
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()
protected void	mergeGroupElements(GroupElement parent, GroupElement child)
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	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 Details

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 Details

GroupElement

public GroupElement()

GroupElement

public GroupElement(GroupElement.Type type)

Method Details

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 GroupElement 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

addChild

public void addChild(int index,
 RuleConditionElement rce)

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

getChildren

public List<RuleConditionElement> getChildren()

getInnerDeclarations

public Map<String,Declaration> 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:

getInnerDeclarations

public Map<String,Declaration> getInnerDeclarations(String consequenceName)

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:

getOuterDeclarations

public Map<String,Declaration> getOuterDeclarations(String consequenceName)

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:

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

mergeGroupElements

protected void mergeGroupElements(GroupElement parent,
 GroupElement child)

pack

public void pack(GroupElement parent)

equals

public boolean equals(Object object)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

clone

public GroupElement clone()

Clones all Conditional Elements but references the non ConditionalElement children

Specified by:

clone in interface RuleConditionElement

Specified by:

clone in class ConditionalElement

Returns:

cloneOnlyGroup

public GroupElement cloneOnlyGroup()

clone

protected GroupElement clone(boolean deepClone)

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<RuleConditionElement> 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)

containesNode

public boolean containesNode(GroupElement.Type node)