/****************************************************************************

**

** Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team.

** All rights reserved.

**

** Portion Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

**

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

****************************************************************************/

#include "qanalyzer_p.h"

#include "qclucene_global_p.h"

#include <CLucene.h>

#include <CLucene/analysis/AnalysisHeader.h>

QT_BEGIN_NAMESPACE

QCLuceneAnalyzerPrivate::QCLuceneAnalyzerPrivate()

    : QSharedData()

{

    analyzer = 0;

    deleteCLuceneAnalyzer = true;

}

QCLuceneAnalyzerPrivate::QCLuceneAnalyzerPrivate(const QCLuceneAnalyzerPrivate &other)

    : QSharedData()

{

    analyzer = _CL_POINTER(other.analyzer);

    deleteCLuceneAnalyzer = other.deleteCLuceneAnalyzer;

}

QCLuceneAnalyzerPrivate::~QCLuceneAnalyzerPrivate()

{

    if (deleteCLuceneAnalyzer)

        _CLDECDELETE(analyzer);

}

QCLuceneAnalyzer::QCLuceneAnalyzer()

    : d(new QCLuceneAnalyzerPrivate())

{

    //nothing todo, private

}

QCLuceneAnalyzer::~QCLuceneAnalyzer()

{

    // nothing todo

}

qint32 QCLuceneAnalyzer::positionIncrementGap(const QString &fieldName) const

{

    Q_UNUSED(fieldName);

    return 0;

}

QCLuceneTokenStream QCLuceneAnalyzer::tokenStream(const QString &fieldName,

                                                  const QCLuceneReader &reader) const

{

    TCHAR *fName = QStringToTChar(fieldName);

    QCLuceneTokenStream tokenStream;

    tokenStream.d->tokenStream = d->analyzer->tokenStream(fName, reader.d->reader);

    delete [] fName;

    return tokenStream;

}

QCLuceneStandardAnalyzer::QCLuceneStandardAnalyzer()

    : QCLuceneAnalyzer()

{

    d->analyzer = new lucene::analysis::standard::StandardAnalyzer();

}

QCLuceneStandardAnalyzer::~QCLuceneStandardAnalyzer()

{

    // nothing todo

}

QCLuceneStandardAnalyzer::QCLuceneStandardAnalyzer(const QStringList &stopWords)

{

    const TCHAR **tArray = new const TCHAR*[stopWords.count() +1];

    for(int i = 0; i < stopWords.count(); ++i) {

        TCHAR *stopWord = QStringToTChar(stopWords.at(i));

        tArray[i] = STRDUP_TtoT(stopWord);

        delete [] stopWord;

    }

    tArray[stopWords.count()] = 0;

    d->analyzer = new lucene::analysis::standard::StandardAnalyzer(tArray);

}

QCLuceneWhitespaceAnalyzer::QCLuceneWhitespaceAnalyzer()

    : QCLuceneAnalyzer()

{

    d->analyzer = new lucene::analysis::WhitespaceAnalyzer();

}

QCLuceneWhitespaceAnalyzer::~QCLuceneWhitespaceAnalyzer()

{

    // nothing todo

}

QCLuceneSimpleAnalyzer::QCLuceneSimpleAnalyzer()

    : QCLuceneAnalyzer()

{

    d->analyzer = new lucene::analysis::SimpleAnalyzer();

}

QCLuceneSimpleAnalyzer::~QCLuceneSimpleAnalyzer()

{

    // nothing todo

}

QCLuceneStopAnalyzer::QCLuceneStopAnalyzer()

    : QCLuceneAnalyzer()

{

    d->analyzer = new lucene::analysis::StopAnalyzer();

}

QCLuceneStopAnalyzer::~QCLuceneStopAnalyzer()

{

    // nothing todo

}

QCLuceneStopAnalyzer::QCLuceneStopAnalyzer(const QStringList &stopWords)

    : QCLuceneAnalyzer()

{

    const TCHAR **tArray = new const TCHAR*[stopWords.count() +1];

    for(int i = 0; i < stopWords.count(); ++i) {

        TCHAR *stopWord = QStringToTChar(stopWords.at(i));

        tArray[i] = STRDUP_TtoT(stopWord);

        delete [] stopWord;

    }

    tArray[stopWords.count()] = 0;

    d->analyzer = new lucene::analysis::StopAnalyzer(tArray);

}

QStringList QCLuceneStopAnalyzer::englishStopWords() const

{

    QStringList stopWordList;

    const TCHAR** stopWords = lucene::analysis::StopAnalyzer::ENGLISH_STOP_WORDS;

    for (qint32 i = 0; stopWords[i] != 0; ++i)

        stopWordList.append(TCharToQString(stopWords[i]));

    return stopWordList;

}

QCLuceneKeywordAnalyzer::QCLuceneKeywordAnalyzer()

    : QCLuceneAnalyzer()

{

    d->analyzer = new lucene::analysis::KeywordAnalyzer();

}

QCLuceneKeywordAnalyzer::~QCLuceneKeywordAnalyzer()

{

    // nothing todo

}

QCLucenePerFieldAnalyzerWrapper::QCLucenePerFieldAnalyzerWrapper(

    QCLuceneAnalyzer *defaultAnalyzer) 

    : QCLuceneAnalyzer()

{

    d->analyzer = new 

        lucene::analysis::PerFieldAnalyzerWrapper(defaultAnalyzer->d->analyzer);

    analyzers.append(defaultAnalyzer);

    defaultAnalyzer->d->deleteCLuceneAnalyzer = false;

}

QCLucenePerFieldAnalyzerWrapper::~QCLucenePerFieldAnalyzerWrapper()

{

    qDeleteAll(analyzers);

}

void QCLucenePerFieldAnalyzerWrapper::addAnalyzer(const QString &fieldName, 

                                                  QCLuceneAnalyzer *analyzer)

{

    lucene::analysis::PerFieldAnalyzerWrapper *analyzerWrapper = 

        static_cast<lucene::analysis::PerFieldAnalyzerWrapper*> (d->analyzer);

    if (analyzerWrapper == 0)

        return;

    analyzers.append(analyzer);

    analyzer->d->deleteCLuceneAnalyzer = false;

    TCHAR *fName = QStringToTChar(fieldName);

    analyzerWrapper->addAnalyzer(fName, analyzer->d->analyzer);

    delete [] fName;

}

QT_END_NAMESPACE