org.cdlib.xtf.textEngine

Class RefieldingQueryRewriter

Object

QueryRewriter

XtfQueryRewriter

RefieldingQueryRewriter

public class RefieldingQueryRewriter
extends XtfQueryRewriter

This class swaps the current field of every sub-query to the specified field.

Author:

Martin Haye

Nested Class Summary

Nested classes/interfaces inherited from class QueryRewriter

QueryRewriter.SpanClauseJoiner

Field Summary

Fields

Modifier and Type	Field and Description
private String	newField

Constructor Summary

Constructors

Constructor and Description
RefieldingQueryRewriter()

Method Summary

Modifier and Type	Method and Description
Query	refield(Query q, String field) Change the field name of the given query
protected Query	rewrite(NumericRangeQuery nrq) Rewrite a numeric range query
protected Query	rewrite(SpanRangeQuery q) Rewrite a span range query.
protected Query	rewrite(SpanTermQuery q) Rewrite a span term query.
protected Query	rewrite(SpanWildcardQuery q) Rewrite a span wildcard query.
protected Query	rewrite(TermQuery q) Rewrite a term query.
private Term	rewriteTerm(Term t) Switch the field of the given term

Methods inherited from class XtfQueryRewriter

rewrite, rewrite, rewrite, rewriteQuery

Methods inherited from class QueryRewriter

combineBoost, copyBoost, copyBoost, forceRewrite, rewrite, rewrite, rewrite, rewrite, rewrite, rewrite, rewrite, rewrite, rewriteClauses

Methods inherited from class Object

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

Field Detail

newField

private String newField

Constructor Detail

RefieldingQueryRewriter

public RefieldingQueryRewriter()

Method Detail

refield

public Query refield(Query q,
                     String field)

Change the field name of the given query

rewriteTerm

private Term rewriteTerm(Term t)

Switch the field of the given term

rewrite

protected Query rewrite(TermQuery q)

Description copied from class: QueryRewriter

Rewrite a term query. The base class does nothing.

Overrides:

rewrite in class QueryRewriter

Parameters:

q - The query to rewrite

Returns:

Rewritten version, or 'q' unchanged if no changed needed.

rewrite

protected Query rewrite(SpanTermQuery q)

Description copied from class: QueryRewriter

Rewrite a span term query. The base class does nothing unless rewriting is forced.

Overrides:

rewrite in class QueryRewriter

Parameters:

q - The query to rewrite

Returns:

Rewritten version, or 'q' unchanged if no changed needed.

rewrite

protected Query rewrite(SpanWildcardQuery q)

Description copied from class: QueryRewriter

Rewrite a span wildcard query. The base class does nothing unless rewriting is forced.

Overrides:

rewrite in class QueryRewriter

Parameters:

q - The query to rewrite

Returns:

Rewritten version, or 'q' unchanged if no changed needed.

rewrite

protected Query rewrite(SpanRangeQuery q)

Description copied from class: QueryRewriter

Rewrite a span range query. The base class does nothing unless rewriting is forced.

Overrides:

rewrite in class QueryRewriter

Parameters:

q - The query to rewrite

Returns:

Rewritten version, or 'q' unchanged if no changed needed.

rewrite

protected Query rewrite(NumericRangeQuery nrq)

Description copied from class: XtfQueryRewriter

Rewrite a numeric range query

Overrides:

rewrite in class XtfQueryRewriter