Package li.selman.jpbe.dsl.position

Class DynamicPosition

java.lang.Object

li.selman.jpbe.dsl.position.DynamicPosition

All Implemented Interfaces:

DslElement, Position

public class DynamicPosition
extends Object
implements Position

Constructor Summary

Constructors

Constructor	Description
DynamicPosition(TokenSequence prefix, TokenSequence suffix, int occurrence)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	evalToPosition(String s)	Given an input, dynamically evaluate to an index inside for string manipulation operations.
int	getDslWeight()	The weight can be used to find an optimal program in a set of valid programs.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

DynamicPosition

public DynamicPosition(TokenSequence prefix,
 TokenSequence suffix,
 int occurrence)

Method Details

getDslWeight

public int getDslWeight()

Description copied from interface: DslElement

The weight can be used to find an optimal program in a set of valid programs. "Optimal" is subjective and can go into different directions. Some examples include:

Weight by how expensive a DSL element is to execute.

Weight by how likely a DSL element is to be part of a generic full program. A ConstantPosition generally is less generic. Thus, the user has to specify their intent more often to finish their wrangling task.

Specified by:

getDslWeight in interface DslElement

Returns:

the weight of the DSL element

evalToPosition

public int evalToPosition(String s)
                   throws NoPositionException

Description copied from interface: Position

Given an input, dynamically evaluate to an index inside for string manipulation operations.

Specified by:

evalToPosition in interface Position

Parameters:

s - input

Returns:

the index

Throws:

NoPositionException - if no position can be evaluated to

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object