Package com.singularsys.extensions.rewrite

Class AbstractRewrite

java.lang.Object

com.singularsys.extensions.rewrite.AbstractRewrite

All Implemented Interfaces:

RewriteRuleI, JepComponent, Serializable

Direct Known Subclasses:

AbstractVectorMatrixRule, BinaryToNaryRule, CollectPowers, ExpandBrackets, ExpandPower, NaryToBinaryRule, UnchainingRewriteRule

public abstract class AbstractRewrite
extends Object
implements RewriteRuleI

Basic implementation for a RewriteRule. Subclasses can have access to NodeFactory,OperatorSet,TreeUtils and XJep objects.

Author:

Rich Morris Created on 01-Oct-2004

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected DeepCopyVisitor	dcv	A DeepCopyVisitor for copying nodes.
protected Jep	jep	A reference to main XJep object.
protected NodeFactory	nf	A NodeFactory used for construction nodes.
protected OperatorTableI	opSet	An OperatorSet used for finding operators.
protected TreeUtils	tu	TreeUtils for testing types of nodes.

Constructor Summary

Constructors

Constructor	Description
AbstractRewrite()

Method Summary

Modifier and Type	Method	Description
JepComponent	getLightWeightInstance()	Gets a light-weight instance suitable for using in multiple threads.
void	init(Jep jep)	Initialize the component.
String	toString()	Descriptions for rewrite rules are specified in the properties file with key <class name>.description.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.singularsys.extensions.rewrite.RewriteRuleI

apply, test

Field Details

nf

protected NodeFactory nf

A NodeFactory used for construction nodes.

opSet

protected OperatorTableI opSet

An OperatorSet used for finding operators.

tu

protected TreeUtils tu

TreeUtils for testing types of nodes.

jep

protected Jep jep

A reference to main XJep object.

dcv

protected DeepCopyVisitor dcv

A DeepCopyVisitor for copying nodes.

Constructor Details

AbstractRewrite

public AbstractRewrite()

Method Details

init

public void init(Jep jep)

Description copied from interface: JepComponent

Initialize the component. This method is called whenever a component is added to Jep. Hence, it allows components to keep track of the other components they may rely on.

Specified by:

init in interface JepComponent

Parameters:

jep - the current Jep instance

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Returns:

either a new instance, null or 'this'.

toString

public String toString()

Descriptions for rewrite rules are specified in the properties file with key <class name>.description.

Overrides:

toString in class Object