org.cdlib.xtf.textEngine
Class QueryProcessor

Object
  QueryProcessor

Direct Known Subclasses:

DefaultQueryProcessor

public abstract class QueryProcessor
extends Object

Takes a QueryRequest, rewrites the queries if necessary to remove stop- words and form bi-grams, then consults the index(es), and produces a QueryResult.

Author:

Martin Haye

Constructor Summary

QueryProcessor()

Method Summary

abstract QueryResult	processRequest(QueryRequest req) Takes a query request and handles searching the index and forming the results.
void	resetCache() Optional method: hint to the query processor to clear any cached index data, so that recently indexed documents will appear in search results.
void	setIndexWarmer(IndexWarmer warmer) Optional method: set the background warmer for indexes.
void	setXtfHome(String homeDir) Optional method: set the XTF home directory (used for background warming in the default query processor.)

Methods inherited from class Object

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

Constructor Detail

QueryProcessor

public QueryProcessor()

Method Detail

processRequest

public abstract QueryResult processRequest(QueryRequest req)
                                    throws IOException

Takes a query request and handles searching the index and forming the results.

Parameters:

req - The request to process

Returns:

Zero or more document hits

Throws:

IOException

resetCache

public void resetCache()

Optional method: hint to the query processor to clear any cached index data, so that recently indexed documents will appear in search results.

setXtfHome

public void setXtfHome(String homeDir)

Optional method: set the XTF home directory (used for background warming in the default query processor.)

setIndexWarmer

public void setIndexWarmer(IndexWarmer warmer)

Optional method: set the background warmer for indexes.