Package com.singularsys.extensions.rewrite

Class VariableShifter

java.lang.Object

com.singularsys.extensions.rewrite.VariableShifter

All Implemented Interfaces:

RewriteVisitor.VariableRuleI, JepComponent, java.io.Serializable

public class VariableShifter
extends java.lang.Object
implements RewriteVisitor.VariableRuleI

Replaces a variable "x" by "x + d" where d is a double value. This adds a Node.HookKey to all matching variable nodes. These can be removed by calling removeHooks(Node)

Since:

Jep 4.0/Extentions 2.1

See Also:

RewriteVisitor, Serialized Form

Constructor Summary

Constructors

Constructor	Description
VariableShifter(java.lang.String name, double value)

Method Summary

Modifier and Type	Method	Description
Node	apply(ASTVarNode node)	Rewrites the node
JepComponent	getLightWeightInstance()	Gets a light-weight instance suitable for using in multiple threads.
static Node.HookKey	getVariableShifterHook()	Hook used by this class
void	init(Jep jep)	Initialize the component.
static void	removeHooks(Node node)	Remove all instances of the hook used by this class
boolean	test(ASTVarNode node)	Returns true if node needs to be rewritten, according to this rule.

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableShifter

public VariableShifter(java.lang.String name,
                       double value)

Method Detail

init

public void init(Jep jep)

Description copied from interface: JepComponent

Initialize the component. This methods 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 an new instance, null or 'this'.

test

public boolean test(ASTVarNode node)
             throws ParseException

Description copied from interface: RewriteVisitor.VariableRuleI

Returns true if node needs to be rewritten, according to this rule.

Specified by:

test in interface RewriteVisitor.VariableRuleI

Throws:

ParseException - if for some reason rewriting cannot be performed.

apply

public Node apply(ASTVarNode node)
           throws ParseException

Description copied from interface: RewriteVisitor.VariableRuleI

Rewrites the node

Specified by:

apply in interface RewriteVisitor.VariableRuleI

Throws:

ParseException

removeHooks

public static void removeHooks(Node node)
                        throws JepException

Remove all instances of the hook used by this class

Parameters:

node -

Throws:

JepException

getVariableShifterHook

public static Node.HookKey getVariableShifterHook()

Hook used by this class

Returns: