com.varankin.bnf.tree
Interface ParsedRule<Atom>

Type Parameters:

Atom - elementary object described by syntax.

All Superinterfaces:

java.lang.Iterable<ParsedUnit<Atom>>, ParsedUnit<Atom>

public interface ParsedRule<Atom>
extends ParsedUnit<Atom>, java.lang.Iterable<ParsedUnit<Atom>>

A parsed rule unites sequence of other parsed units. Units correspond to associated syntax rule.

Author:

© 2009 Nikolai Varankine

Field Summary

static float	IDENTICAL Proximity value to denote exact match between objects.
static float	IRRELEVANT Proximity value to denote no match between objects.

Method Summary

MetaIdentifier	id()
float	proximity() Returns identity level of parsed rule with expectation specified by syntax: IRRELEVANT - parsed rule does not meet expectation.

Methods inherited from interface java.lang.Iterable

iterator

Field Detail

IRRELEVANT

static final float IRRELEVANT

Proximity value to denote no match between objects.

See Also:

Constant Field Values

IDENTICAL

static final float IDENTICAL

Proximity value to denote exact match between objects.

See Also:

Constant Field Values

Method Detail

id

MetaIdentifier id()

Returns:

identifier of the syntax rule describing contents of the unit.

proximity

float proximity()

Returns identity level of parsed rule with expectation specified by syntax:

• IRRELEVANT - parsed rule does not meet expectation.
• IDENTICAL - parsed rule meets expectation exactly.
• any value in between IRRELEVANT and IDENTICAL - parsed rule meets expectation with some sense of abstraction; the lesser the value the less identity observed. Same values returned on different parsed rule instances does not necessarily mean equal grade of proximity.

Returns:

level of proximity as number within range [IRRELEVANT,IDENTICAL].