author | hgs |
Mon, 28 Jun 2010 10:34:53 +0530 | |
changeset 8 | 6547bf8ca13a |
parent 7 | a5fbfefd615f |
child 19 | e3c09e9691e0 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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// general utilities |
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#include "wchar.h" |
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#include <string> |
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#include <vector> |
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#include <sstream> |
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#include <iostream> |
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#include <fstream> |
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#include <algorithm> |
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// clucene |
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#include "CLucene.h" |
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// support |
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#include "cpixparsetools.h" |
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#include "cpixfstools.h" |
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// internal |
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#include "analyzer.h" |
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#include "cpixanalyzer.h" |
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#include "cpixexc.h" |
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#include "document.h" |
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#include "cluceneext.h" |
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#include "indevicecfg.h" |
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#include "initparams.h" |
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#include "thaianalysis.h" |
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#include "analyzerexp.h" |
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#include "customanalyzer.h" |
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#include "common/cpixlog.h" |
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namespace |
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{ |
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const char AGGR_NONFILEREADERPROXY_ERR[] |
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= "Aggregated reader field should be FileReaderProxy instance"; |
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const char AGGR_STREAMREADER_ERR[] |
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= "Aggregating streamValue-fields not implemented"; |
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const char THAI_LANGUAGE_FILE[] |
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= "thaidict.sm"; |
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const char ANALYZER_FILE[] |
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= "analyzer.loc"; |
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const wchar_t DEFAULT_ANALYZER_CONFIG[] |
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= L"default"; |
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const wchar_t QUERY_ANALYZER_CONFIG[] |
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= L"query"; |
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const wchar_t PREFIX_ANALYZER_CONFIG[] |
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= L"prefix"; |
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// const wchar_t CPIX_ANALYZER_FALLBACK[] |
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// = CPIX_ANALYZER_STANDARD; |
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// |
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// const wchar_t CPIX_PREFIX_ANALYZER_FALLBACK[] |
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// = CPIX_TOKENIZER_LETTER L">" CPIX_FILTER_LOWERCASE; |
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} |
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namespace Cpix { |
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Analysis* Analysis::theInstance_ = NULL; |
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void Analysis::init(InitParams& ip) { |
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// Init thai analysis with thai dictionary |
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std::string thai( Cpt::appendpath(ip.getResourceDir(), |
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THAI_LANGUAGE_FILE) ); |
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if ( Cpt::filesize( thai.c_str() ) ) { |
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analysis::InitThaiAnalysis(thai.c_str()); |
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} else { |
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logMsg(CPIX_LL_WARNING, |
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"Thai dictionary could not be found. Thai analysis will NOT work."); |
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} |
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// Setup the analysis instance |
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theInstance_ = new Analysis(ip); |
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} |
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Analysis::Analysis(InitParams& ip) |
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: defaultAnalyzer_(), |
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queryAnalyzer_(), |
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prefixAnalyzer_() { |
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auto_ptr<AnalyzerExp::Piping> p = parse( Cpt::appendpath( ip.getResourceDir(), ANALYZER_FILE ) ); |
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defaultAnalyzer_.reset( new CustomAnalyzer( *p, DEFAULT_ANALYZER_CONFIG ) ); |
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queryAnalyzer_.reset( new CustomAnalyzer( *p, QUERY_ANALYZER_CONFIG ) ); |
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prefixAnalyzer_.reset( new CustomAnalyzer( *p, PREFIX_ANALYZER_CONFIG ) ); |
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} |
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auto_ptr<AnalyzerExp::Piping> Analysis::parse(std::string path) { |
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std::wifstream in(path.c_str()); |
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auto_ptr<AnalyzerExp::Piping> ret; |
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if ( in ) { |
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// Reserve constant size buffer and populate it with definition |
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// |
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int filesize = Cpt::filesize(path.c_str()); |
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Cpt::auto_array<wchar_t> buf( new wchar_t[filesize+1] ); |
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in.read(buf.get(), filesize); |
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buf.get()[filesize] = '\0'; |
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if ( !in.fail() ) { |
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try { |
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ret = AnalyzerExp::ParsePiping( buf.get() ); |
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} catch (...) {} |
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} |
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in.close(); |
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} |
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if ( !ret.get() ) { |
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THROW_CPIXEXC("Analyzer definition not found. %s could not be opened. ", path.c_str()); |
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} |
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return ret; |
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} |
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void Analysis::shutdown() { |
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analysis::ShutdownThaiAnalysis(); |
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delete theInstance_; |
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theInstance_ = NULL; |
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} |
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lucene::analysis::Analyzer& Analysis::getDefaultAnalyzer() { |
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// TODO: Assert( theInstance_ ); |
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return *theInstance_->defaultAnalyzer_; |
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} |
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lucene::analysis::Analyzer& Analysis::getQueryAnalyzer() { |
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// TODO: Assert( theInstance_ ); |
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return *theInstance_->queryAnalyzer_; |
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} |
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lucene::analysis::Analyzer& Analysis::getPrefixAnalyzer() { |
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// TODO: Assert( theInstance_ ); |
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return *theInstance_->prefixAnalyzer_; |
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} |
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PrefixGenerator::PrefixGenerator( |
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lucene::analysis::TokenStream* in, |
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bool deleteTS, |
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size_t maxPrefixLength) |
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: TokenFilter(in, deleteTS), |
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token_(), |
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prefixLength_(0), |
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maxPrefixLength_(maxPrefixLength) {} |
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PrefixGenerator::~PrefixGenerator() { |
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} |
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bool PrefixGenerator::next(lucene::analysis::Token* token) { |
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token_.setPositionIncrement(0); |
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while (prefixLength_ == 0) { |
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token_.setPositionIncrement(1); // default position increment |
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if (!input->next(&token_)) { |
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return false; |
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} |
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prefixLength_ = std::min(token_.termTextLength(), maxPrefixLength_); |
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} |
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|
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// Clip token |
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std::wstring clipped; |
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clipped = token_.termText(); |
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token_.setText(clipped.substr(0, prefixLength_).c_str()); |
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|
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// Copy |
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token->set(token_.termText(), token_.startOffset(), token_.endOffset(), token_.type()); |
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token->setPositionIncrement(token_.getPositionIncrement()); |
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// Reduce prefixLength_ |
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prefixLength_--; |
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return true; |
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} |
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AggregateFieldTokenStream::AggregateFieldTokenStream(lucene::analysis::Analyzer& analyzer, |
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DocumentFieldIterator* fields) |
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: stream_(), analyzer_( analyzer ), reader_(), fields_( fields ) { |
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getNextStream(); |
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} |
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|
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AggregateFieldTokenStream::~AggregateFieldTokenStream() { |
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_CLDELETE( stream_ ); |
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delete fields_; |
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} |
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|
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bool AggregateFieldTokenStream::next(lucene::analysis::Token* token) { |
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while ( stream_ ) { |
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if ( stream_->next( token ) ) { |
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return true; |
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} |
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getNextStream(); |
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} |
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return false; |
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} |
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|
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void AggregateFieldTokenStream::close() { |
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if (stream_) stream_->close(); |
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_CLDELETE( stream_ ); |
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_CLDELETE( reader_ ); |
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} |
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|
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void AggregateFieldTokenStream::getNextStream() |
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{ |
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using namespace lucene::document; |
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using namespace lucene::util; |
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|
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if ( stream_ ) stream_->close(); |
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_CLDELETE( stream_ ); |
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_CLDELETE( reader_ ); |
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|
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Field* field = 0; |
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while (*fields_ && field == NULL) |
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{ |
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field = (*fields_)++; |
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|
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if (!field->isAggregated()) |
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{ |
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field = 0; |
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} |
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} |
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if (field) { |
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if (field->stringValue() != NULL) |
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{ |
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reader_ = _CLNEW CL_NS(util)::StringReader(field->stringValue(),_tcslen(field->stringValue()),false); |
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} |
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else if (field->native().readerValue() != NULL) |
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{ |
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Reader* r = field->native().readerValue(); |
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FileReaderProxy |
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* frp = |
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dynamic_cast<FileReaderProxy*>(r); |
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if (frp == NULL) |
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{ |
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_CLTHROWA(CL_ERR_IO, AGGR_NONFILEREADERPROXY_ERR); |
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} |
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else |
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{ |
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reader_ = frp->clone(); |
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} |
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} |
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else |
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{ |
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_CLTHROWA(CL_ERR_IO, AGGR_STREAMREADER_ERR); |
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} |
7
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if(field->isFreeText()) |
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{ |
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using namespace lucene::analysis; |
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stream_ = _CLNEW standard::StandardTokenizer(reader_); |
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stream_ = _CLNEW standard::StandardFilter(stream_,true); |
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stream_ = _CLNEW LowerCaseFilter(stream_,true); |
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} |
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else |
0
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stream_ = analyzer_.tokenStream( field->name(), reader_ ); |
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} |
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} |
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|
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281 |
|
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AggregateFieldAnalyzer::AggregateFieldAnalyzer(Cpix::Document& document, |
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lucene::analysis::Analyzer& analyzer) |
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: analyzer_(analyzer), document_(document) |
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{ |
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} |
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|
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lucene::analysis::TokenStream* AggregateFieldAnalyzer::tokenStream(const TCHAR * fieldName, |
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lucene::util::Reader * reader) { |
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if ( wcscmp( fieldName, LCPIX_DEFAULT_FIELD ) == 0 ) { |
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return new AggregateFieldTokenStream( analyzer_, document_.fields()); |
1
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} else if ( wcscmp( fieldName, LCPIX_DEFAULT_PREFIX_FIELD ) == 0 ) { |
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return |
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new PrefixGenerator( |
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new AggregateFieldTokenStream( analyzer_, document_.fields()), |
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true, |
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OPTIMIZED_PREFIX_MAX_LENGTH); |
0
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} else { |
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return analyzer_.tokenStream( fieldName, reader ); |
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} |
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} |
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|
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SystemAnalyzer::SystemAnalyzer(lucene::analysis::Analyzer* analyzer) : analyzer_(analyzer) {} |
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SystemAnalyzer::~SystemAnalyzer() { _CLDELETE(analyzer_); } |
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|
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lucene::analysis::TokenStream* SystemAnalyzer::tokenStream(const TCHAR * fieldName, |
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lucene::util::Reader * reader) { |
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using namespace lucene::analysis; |
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if ( wcscmp( fieldName, LCPIX_DEFAULT_FIELD ) == 0 ) { |
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// Use standard analyzer without stop filter for this task |
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TokenStream* ret = _CLNEW standard::StandardTokenizer(reader); |
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ret = _CLNEW standard::StandardFilter(ret,true); |
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ret = _CLNEW LowerCaseFilter(ret,true); |
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return ret; |
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} else if (wcscmp( fieldName, LCPIX_DOCUID_FIELD) == 0){ |
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// Use standard analyzer without stop filter for this task |
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return _CLNEW KeywordTokenizer(reader); |
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} else if (wcscmp( fieldName, LCPIX_APPCLASS_FIELD ) == 0){ |
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// Use standard analyzer without stop filter for this task |
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TokenStream* ret = _CLNEW WhitespaceTokenizer(reader); |
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ret = _CLNEW LowerCaseFilter(ret,true); |
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return ret; |
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} else if (wcscmp( fieldName, LCPIX_MIMETYPE_FIELD ) == 0) { |
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TokenStream* ret = _CLNEW KeywordTokenizer(reader); |
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return ret; |
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} else { |
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return analyzer_->tokenStream( fieldName, reader ); |
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} |
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} |
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} |
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