org.drools.rule
Class PredicateConstraint

java.lang.Object
  org.drools.rule.MutableTypeConstraint
      org.drools.rule.PredicateConstraint

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, AlphaNodeFieldConstraint, BetaNodeFieldConstraint, Constraint, RuleComponent

public class PredicateConstraint
extends MutableTypeConstraint

See Also:

Serialized Form

Nested Class Summary

static class

PredicateConstraint.PredicateContextEntry

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

Constraint.ConstraintType

Constructor Summary

PredicateConstraint(Declaration[] previousDeclarations, Declaration[] localDeclarations)

PredicateConstraint(PredicateExpression evaluator)

PredicateConstraint(PredicateExpression expression, Declaration[] previousDeclarations, Declaration[] localDeclarations, java.lang.String[] requiredGlobals)

Method Summary

java.lang.Object	clone() Clones the constraint
ContextEntry	createContextEntry()
boolean	equals(java.lang.Object object)
Declaration[]	getLocalDeclarations()
PredicateExpression	getPredicateExpression()
Declaration[]	getPreviousDeclarations()
Declaration[]	getRequiredDeclarations() Returns all the declarations required by the given constraint implementation.
int	hashCode()
boolean	isAllowed(Extractor extractor, InternalFactHandle handle, InternalWorkingMemory workingMemory, ContextEntry context)
boolean	isAllowed(java.lang.Object object, InternalWorkingMemory workingMemory, ContextEntry ctx)
boolean	isAllowedCachedLeft(ContextEntry context, java.lang.Object object)
boolean	isAllowedCachedRight(ReteTuple tuple, ContextEntry context)
void	replaceDeclaration(Declaration oldDecl, Declaration newDecl) A constraint may be required to replace an old declaration object by a new updated one
void	setPredicateExpression(PredicateExpression expression)
java.lang.String	toString()

Methods inherited from class org.drools.rule.MutableTypeConstraint

getType, setType

Methods inherited from class java.lang.Object

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

Constructor Detail

PredicateConstraint

public PredicateConstraint(PredicateExpression evaluator)

PredicateConstraint

public PredicateConstraint(Declaration[] previousDeclarations,
                           Declaration[] localDeclarations)

PredicateConstraint

public PredicateConstraint(PredicateExpression expression,
                           Declaration[] previousDeclarations,
                           Declaration[] localDeclarations,
                           java.lang.String[] requiredGlobals)

Method Detail

getRequiredDeclarations

public Declaration[] getRequiredDeclarations()

Description copied from interface: Constraint

Returns all the declarations required by the given constraint implementation.

Returns:

getPreviousDeclarations

public Declaration[] getPreviousDeclarations()

getLocalDeclarations

public Declaration[] getLocalDeclarations()

replaceDeclaration

public void replaceDeclaration(Declaration oldDecl,
                               Declaration newDecl)

Description copied from interface: Constraint

A constraint may be required to replace an old declaration object by a new updated one

setPredicateExpression

public void setPredicateExpression(PredicateExpression expression)

getPredicateExpression

public PredicateExpression getPredicateExpression()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object object)

Overrides:

equals in class java.lang.Object

createContextEntry

public ContextEntry createContextEntry()

isAllowed

public boolean isAllowed(java.lang.Object object,
                         InternalWorkingMemory workingMemory,
                         ContextEntry ctx)

isAllowed

public boolean isAllowed(Extractor extractor,
                         InternalFactHandle handle,
                         InternalWorkingMemory workingMemory,
                         ContextEntry context)

isAllowedCachedLeft

public boolean isAllowedCachedLeft(ContextEntry context,
                                   java.lang.Object object)

isAllowedCachedRight

public boolean isAllowedCachedRight(ReteTuple tuple,
                                    ContextEntry context)

clone

public java.lang.Object clone()

Description copied from interface: Constraint

Clones the constraint

Specified by:

clone in interface Constraint

Specified by:

clone in class MutableTypeConstraint

Returns: