Package org.drools.core.rule

Class AbstractCompositeConstraint

java.lang.Object

org.drools.core.rule.MutableTypeConstraint

org.drools.core.rule.AbstractCompositeConstraint

All Implemented Interfaces:

Externalizable, Serializable, Cloneable, AlphaNodeFieldConstraint, BetaNodeFieldConstraint, Constraint, RuleComponent

public abstract class AbstractCompositeConstraint
extends MutableTypeConstraint

A superclass for all composite constraints, like "OR" and "AND"

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	AbstractCompositeConstraint.MultiFieldConstraintContextEntry	A context entry for composite restrictions

Nested classes/interfaces inherited from interface org.drools.core.spi.Constraint

Constraint.ConstraintType

Field Summary

Fields

Modifier and Type	Field	Description
protected AlphaNodeFieldConstraint[]	alphaConstraints
protected BetaNodeFieldConstraint[]	betaConstraints
protected Declaration[]	requiredDeclarations

Constructor Summary

Constructors

Constructor	Description
AbstractCompositeConstraint()

Method Summary

Modifier and Type	Method	Description
void	addAlphaConstraint(AlphaNodeFieldConstraint constraint)	Adds an alpha constraint to the multi field OR constraint
void	addBetaConstraint(BetaNodeFieldConstraint constraint)	Adds a beta constraint to this multi field OR constraint
void	addConstraint(Constraint constraint)	Adds a constraint too all lists it belongs to by checking for its type
abstract AbstractCompositeConstraint	clone()	Clones the constraint
ContextEntry	createContextEntry()
boolean	equals(Object object)
AlphaNodeFieldConstraint[]	getAlphaConstraints()
BetaNodeFieldConstraint[]	getBetaConstraints()
Declaration[]	getRequiredDeclarations()	Returns all the declarations required by the given constraint implementation.
int	hashCode()
boolean	isTemporal()	Returns true in case this constraint is a temporal constraint
void	readExternal(ObjectInput in)
void	replaceDeclaration(Declaration oldDecl, Declaration newDecl)	When a rule contains multiple logical branches, i.e., makes use of 'OR' CE, it is required to clone patterns and declarations for each logical branch.
protected void	updateRequiredDeclarations(Constraint constraint)	Updades the cached required declaration array
void	writeExternal(ObjectOutput out)

Methods inherited from class org.drools.core.rule.MutableTypeConstraint

cloneIfInUse, getType, setInUse, setType

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.drools.core.spi.AlphaNodeFieldConstraint

isAllowed

Methods inherited from interface org.drools.core.spi.BetaNodeFieldConstraint

isAllowedCachedLeft, isAllowedCachedRight

Methods inherited from interface org.drools.core.spi.Constraint

addPackageNames, equals, getListenedPropertyMask, getPackageNames, mergeEvaluationContext, registerEvaluationContext

Field Detail

alphaConstraints

protected AlphaNodeFieldConstraint[] alphaConstraints

betaConstraints

protected BetaNodeFieldConstraint[] betaConstraints

requiredDeclarations

protected Declaration[] requiredDeclarations

Constructor Detail

AbstractCompositeConstraint

public AbstractCompositeConstraint()

Method Detail

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Overrides:

readExternal in class MutableTypeConstraint

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class MutableTypeConstraint

Throws:

IOException

getAlphaConstraints

public AlphaNodeFieldConstraint[] getAlphaConstraints()

getBetaConstraints

public BetaNodeFieldConstraint[] getBetaConstraints()

isTemporal

public boolean isTemporal()

Description copied from interface: Constraint

Returns true in case this constraint is a temporal constraint

Returns:

addAlphaConstraint

public void addAlphaConstraint(AlphaNodeFieldConstraint constraint)

Adds an alpha constraint to the multi field OR constraint

Parameters:

constraint -

addBetaConstraint

public void addBetaConstraint(BetaNodeFieldConstraint constraint)

Adds a beta constraint to this multi field OR constraint

Parameters:

constraint -

addConstraint

public void addConstraint(Constraint constraint)

Adds a constraint too all lists it belongs to by checking for its type

Parameters:

constraint -

updateRequiredDeclarations

protected void updateRequiredDeclarations(Constraint constraint)

Updades the cached required declaration array

Parameters:

constraint -

getRequiredDeclarations

public Declaration[] getRequiredDeclarations()

Returns all the declarations required by the given constraint implementation.

Returns:

replaceDeclaration

public void replaceDeclaration(Declaration oldDecl,
                               Declaration newDecl)

When a rule contains multiple logical branches, i.e., makes use of 'OR' CE, it is required to clone patterns and declarations for each logical branch. Since this is done at ReteOO build type, when constraints were already created, eventually some constraints need to update their references to the declarations.

createContextEntry

public ContextEntry createContextEntry()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object object)

Overrides:

equals in class Object

clone

public abstract AbstractCompositeConstraint clone()

Description copied from interface: Constraint

Clones the constraint

Specified by:

clone in interface Constraint

Specified by:

clone in class MutableTypeConstraint

Returns: