/*************************************************************************
*
* $RCSfile: QueryResults.java,v $
*
* $Revision: 1.1 $
*
* last change: $Author: abi $ $Date: 2000/11/30 18:03:51 $
*
* The Contents of this file are made available subject to the terms of
* either of the following licenses
*
* - GNU Lesser General Public License Version 2.1
* - Sun Industry Standards Source License Version 1.1
*
* Sun Microsystems Inc., October, 2000
*
* GNU Lesser General Public License Version 2.1
* =============================================
* Copyright 2000 by Sun Microsystems, Inc.
* 901 San Antonio Road, Palo Alto, CA 94303, USA
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*
* Sun Industry Standards Source License Version 1.1
* =================================================
* The contents of this file are subject to the Sun Industry Standards
* Source License Version 1.1 (the "License"); You may not use this file
* except in compliance with the License. You may obtain a copy of the
* License at http://www.openoffice.org/license.html.
*
* Software provided under this License is provided on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING,
* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
* See the License for the specific provisions governing your rights and
* obligations concerning the Software.
*
* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
*
* Copyright: 2000 by Sun Microsystems, Inc.
*
* All Rights Reserved.
*
* Contributor(s): _______________________________________
*
*
************************************************************************/
package com.sun.xmlsearch.xml.qe;
import com.sun.xmlsearch.util.PrefixTranslator;
import java.io.*;
public final class QueryResults implements Externalizable {
private QueryHitData[] _queryHits;
private String _docType;
private String[] _prefixTranslations; // (prefix, replacement)*
private int _size; // cached size
public QueryResults() { /* for Externalizable */ }
public QueryResults(String[] prefixTranslations, String docType,
QueryHitData[] hits) {
_prefixTranslations = prefixTranslations;
_docType = docType;
_queryHits = hits;
}
public boolean isNonEmpty() {
return _queryHits != null && _queryHits.length > 0 &&
_queryHits[0] != null;
}
public QueryHitIterator makeQueryHitIterator() {
return new QueryHitIteratorImpl();
}
public void translate() {
PrefixTranslator translator =
PrefixTranslator.makePrefixTranslator(_prefixTranslations);
_size = 0;
if (_queryHits != null)
while (_size < _queryHits.length && _queryHits[_size] != null)
_queryHits[_size++].setDocumentType(_docType);
if (translator != null)
for (int i = 0; i < _size; i++)
_queryHits[i].translate(translator);
}
/**************************************************************************/
/* A.Bille */
public int getNextNonZero( int currentRow )
{
int idx = currentRow + 1;
if( _queryHits != null )
{
while( idx < _queryHits.length && _queryHits[idx] == null )
++idx;
if( idx == _queryHits.length )
return -1;
return idx;
}
return -1;
}
public int getNonZeroCount()
{
int count = 0;
if( _queryHits != null )
for( int i = 0; i < _queryHits.length; ++i )
if( _queryHits[i] != null ) ++count;
return count;
}
/**************************************************************************/
public int size() {
return _size;
}
public QueryHitData getHit(int index) {
return _queryHits[index];
}
public void readExternal(ObjectInput in)
throws ClassNotFoundException, IOException {
final int nHits = in.readInt();
if (nHits > 0) {
_queryHits = new QueryHitData[nHits];
for (int i = 0; i < nHits; i++)
(_queryHits[i] = new QueryHitData()).readExternal(in);
_prefixTranslations = (String[]) in.readObject();
_docType = (String) in.readObject();
}
else {
_prefixTranslations = null;
_queryHits = null;
_docType = null;
}
}
public void writeExternal(ObjectOutput out) throws IOException {
if (_queryHits != null) {
final int length = _queryHits.length;
if (length > 0) {
int nHits = 0;
while (_queryHits[nHits] != null && ++nHits < length)
;
if (nHits > 0) {
out.writeInt(nHits);
for (int i = 0; i < nHits; i++)
_queryHits[i].writeExternal(out);
out.writeObject(_prefixTranslations);
out.writeObject(_docType);
return;
}
}
}
// else
out.writeInt(0);
}
private final class QueryHitIteratorImpl implements QueryHitIterator {
private int _index;
private double _penalty;
public QueryHitIteratorImpl() {
_penalty = _queryHits[_index = 0].getPenalty();
}
public QueryHitData getHit() {
return _queryHits[_index];
}
/** advances; returns true iff next exists */
public boolean next() {
if (++_index < _queryHits.length && _queryHits[_index] != null) {
_penalty = _queryHits[_index].getPenalty();
return true;
}
else {
_penalty = Double.MAX_VALUE;
return false;
}
}
public double getPenalty() {
return _penalty;
}
public boolean betterThan(QueryHitIterator other) {
return _penalty < other.getPenalty();
}
} // end of QueryHitIteratorImpl
}