org.dmd.util.parsing

Class PatternDiscriminator

java.lang.Object

org.dmd.util.parsing.PatternDiscriminator

public class PatternDiscriminator
extends Object

The PatternDiscriminator can be used to analyze a set of strings and attempt to determine a set of patterns that may exist in them.

Author:

peter.strong

Constructor Summary

Constructors

Constructor and Description
PatternDiscriminator(int limit, boolean collapseAlphaNumeric, boolean strict) Creates a pattern discriminator with the specified behaviour.

Method Summary

Modifier and Type	Method and Description
Pattern	analyze(String input) Analyzes the specified string and attempts to categorize it as one of our existing patterns up to the limit of the number of patterns that was indicated at construction time.
ArrayList<String>	getFormattedPatterns()
ArrayList<Pattern>	getPatterns()

Methods inherited from class java.lang.Object

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

Constructor Detail

PatternDiscriminator

public PatternDiscriminator(int limit,
                            boolean collapseAlphaNumeric,
                            boolean strict)

Creates a pattern discriminator with the specified behaviour.

Parameters:

limit - the limit of the number of distinct patterns we'll recognize

collapseAlphaNumeric - indicates we'll treat alphanumerics as a single class of token, otherwise we differentiate between letters and numbers

strict - if true, when we try to match existing patterns, we'll take into account the length of the individual tokens - if the lengths of each token on the pattern don't match, we don't match.

Method Detail

analyze

public Pattern analyze(String input)

Analyzes the specified string and attempts to categorize it as one of our existing patterns up to the limit of the number of patterns that was indicated at construction time.

Parameters:

input - the string we'll analyze

Returns:

the pattern if added a pattern or characterized the string as an existing pattern and null if we've hit the limit of the patterns we'd maintain.

getPatterns

public ArrayList<Pattern> getPatterns()

getFormattedPatterns

public ArrayList<String> getFormattedPatterns()