gate.creole.annic.lucene
Class PatternValidator

java.lang.Object
  gate.creole.annic.lucene.PatternValidator

public class PatternValidator
extends Object

Pattern Validator that given a position of first term, retrieves the entire pattern from the token stream. If it is not able to retrieve the entire pattern, the class reports it as an invalid pattern.

Author:

niraj

Field Summary

private int	AND AND operator
private int	index
private int	NOT Negation operator
private int	OR OR operator
private int	patLen

Constructor Summary

PatternValidator()

Method Summary

int	getPatternLength() Gets the length of the pattern.
private boolean	isEqual(Token tk, Term term) Checks whether two terms are equal.
int	validate(List<String> queryTokens, List<Token> annotations, int from, QueryParser queryParser) This method takes two parameters the actual query issued and annotations in which it checks if the annotations exist that are validating for the given query

Methods inherited from class java.lang.Object

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

Field Detail

AND

private final int AND

AND operator

See Also:

Constant Field Values

OR

private final int OR

OR operator

See Also:

Constant Field Values

NOT

private final int NOT

Negation operator

See Also:

Constant Field Values

index

private int index

patLen

private int patLen

Constructor Detail

PatternValidator

public PatternValidator()

Method Detail

getPatternLength

public int getPatternLength()

Gets the length of the pattern.

Returns:

validate

public int validate(List<String> queryTokens,
                    List<Token> annotations,
                    int from,
                    QueryParser queryParser)
             throws SearchException

This method takes two parameters the actual query issued and annotations in which it checks if the annotations exist that are validating for the given query

Parameters:

query - String

annotations - ArrayList

Returns:

int positive number indicates the offset of the last annotation of the pattern. -1 indicates invalid pattern.

Throws:

SearchException

isEqual

private boolean isEqual(Token tk,
                        Term term)

Checks whether two terms are equal.

Parameters:

tk -

term -

Returns: