/*
* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description: Helper class to filter results
*
*/
// INCLUDES
#include "CPcsAlgorithm1FilterHelper.h"
#include "CPcsDebug.h"
// Compare functions
TBool ComparePsPattern ( const TPsPatternDetails& aFirst, const TPsPatternDetails& aSecond )
{
return (CPcsAlgorithm1Utils::MyCompareC(*(aFirst.matchPattern), *(aSecond.matchPattern)));
}
// ============================== MEMBER FUNCTIONS ============================
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::NewL
// Two Phase Construction
// ----------------------------------------------------------------------------
CPcsAlgorithm1FilterHelper* CPcsAlgorithm1FilterHelper::NewL(TSortType aSortType)
{
PRINT ( _L("Enter CPcsAlgorithm1FilterHelper::NewL") );
CPcsAlgorithm1FilterHelper* self = new ( ELeave ) CPcsAlgorithm1FilterHelper();
CleanupStack::PushL( self );
self->ConstructL(aSortType);
CleanupStack::Pop( self );
PRINT ( _L("End CPcsAlgorithm1FilterHelper::NewL") );
return self;
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::CPcsAlgorithm1FilterHelper
// Two Phase Construction
// ----------------------------------------------------------------------------
CPcsAlgorithm1FilterHelper::CPcsAlgorithm1FilterHelper()
{
PRINT ( _L("Enter CPcsAlgorithm1FilterHelper::CPcsAlgorithm1FilterHelper") );
PRINT ( _L("End CPcsAlgorithm1FilterHelper::CPcsAlgorithm1FilterHelper") );
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::ConstructL
// Two Phase Construction
// ----------------------------------------------------------------------------
void CPcsAlgorithm1FilterHelper::ConstructL(TSortType aSortType)
{
PRINT ( _L("Enter CPcsAlgorithm1FilterHelper::ConstructL") );
iSortType = aSortType;
iResultCount = -1;
PRINT ( _L("End CPcsAlgorithm1FilterHelper::ConstructL") );
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::~CPcsAlgorithm1FilterHelper
// Destructor
// ----------------------------------------------------------------------------
CPcsAlgorithm1FilterHelper::~CPcsAlgorithm1FilterHelper()
{
PRINT ( _L("Enter CPcsAlgorithm1FilterHelper::~CPcsAlgorithm1FilterHelper") );
// delete match pattern pools
for(TInt i = 0; i < iMatchPatternPools.Count(); i++)
{
iMatchPatternPools[i]->Reset();
delete iMatchPatternPools[i];
iMatchPatternPools[i] = NULL;
}
iMatchPatternPools.Reset();
// delete match pattern details
for(TInt i = 0; i < iMatchPatternDetails.Count(); i++)
{
delete iMatchPatternDetails[i]->matchPattern;
for(TInt j=0; j< iMatchPatternDetails[i]->subPatternArray.Count();j++)
{
delete iMatchPatternDetails[i]->subPatternArray[j]->matchPattern;
iMatchPatternDetails[i]->subPatternArray[j]->matchPattern = NULL;
}
iMatchPatternDetails[i]->subPatternArray.ResetAndDestroy();
}
iMatchPatternDetails.ResetAndDestroy();
PRINT ( _L("End CPcsAlgorithm1FilterHelper::~CPcsAlgorithm1FilterHelper") );
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::AddL
//
// ----------------------------------------------------------------------------
void CPcsAlgorithm1FilterHelper::AddL(CPsData* psData, RPointerArray<TDesC>& aPatternSequence)
{
if(iSortType == EAlphabetical)
{
// Create pool if not already present
if(iMatchPatternPools.Count() == 0 )
{
RPointerArray<CPsData> *tempPsDataArray = new (ELeave) RPointerArray<CPsData> ();
iMatchPatternPools.Append(tempPsDataArray);
}
// Add result to the result set
iMatchPatternPools[0]->Append(psData);
// Update the count
iResultCount++;
// Update sequence list
for(TInt i = 0; i < aPatternSequence.Count(); i++)
{
TInt index = FindSequence(aPatternSequence[i]);
if ( index == KErrNotFound )
{
// sequence not found, add it to array
TPsPatternDetails* temp = new ( ELeave ) TPsPatternDetails;
TInt len = aPatternSequence[i]->Length();
temp->matchPattern = HBufC::NewL(len);
temp->matchPattern->Des().Copy(*(aPatternSequence[i]));
// First occurence should be -1 for alphabetical sort
// and pool index will be 0 as only one pool will be created
temp->firstOccurence = -1;
temp->poolIndex = 0;
iMatchPatternDetails.Append(temp);
}
}
}
else
{
// PatternBased sort
TInt index = AddToPoolL(psData, aPatternSequence);
// Increment the total count
iResultCount++;
}
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::AddToPoolL
//
// ----------------------------------------------------------------------------
TInt CPcsAlgorithm1FilterHelper::AddToPoolL(CPsData* psData,
RPointerArray<TDesC>& aPatternSequence)
{
// Sort the pattern sequence
TLinearOrder<TDesC> rule( CPcsAlgorithm1Utils::MyCompareC );
aPatternSequence.Sort(rule);
// Sort rule
TLinearOrder<CPsData> psDataRule( CPcsAlgorithm1Utils::CompareDataBySortOrderL );
// Search Rule
TIdentityRelation<CPsData> identitySearchRule(CPsData::CompareById);
TInt poolItemCount = -1;
TInt matchpatterpoolIndexToAppend = -1;
for(TInt cnt=0; cnt <aPatternSequence.Count(); cnt++ )
{
// Create the pattern for aPatternSequence[cnt] in iMatchPatternDetails
// and return the index
TInt indexInMatchPatternDetails = CreateMatchPatternDetailsAndPoolsL(aPatternSequence[cnt]);
//Add the data to the pool the first pattern pool.
// The data should be added only once
if(cnt == 0)
{
TInt poolIndex = iMatchPatternDetails[indexInMatchPatternDetails]->poolIndex;
matchpatterpoolIndexToAppend = indexInMatchPatternDetails;
iMatchPatternPools[poolIndex]->InsertInOrderAllowRepeats(psData, psDataRule);
TInt findposition = iMatchPatternPools[poolIndex]->Find(psData,identitySearchRule) ;
if ( findposition != KErrNotFound )
{
poolItemCount = findposition;
}
else
{
poolItemCount = -1;
}
}
else if(cnt > 0)
{
// Check if aPatternSequence[cnt] is listed in subpatterns of aPatternSequence[0]
// If not, then create a sub pattern and apped it to iMatchPatternDetails for aPatternSequence[0]
TInt subSeq = FindSubSequence(aPatternSequence[cnt],matchpatterpoolIndexToAppend);
if(subSeq == KErrNotFound )
{
//Create the subpattern and append it.
TPsSubPattern* tempSubPattern = new ( ELeave ) TPsSubPattern;
tempSubPattern->matchPattern = HBufC::NewL(aPatternSequence[cnt]->Length());
tempSubPattern->matchPattern->Des().Copy(*(aPatternSequence[cnt]));
tempSubPattern->firstOccurenceInThisPattern = poolItemCount;
iMatchPatternDetails[matchpatterpoolIndexToAppend]->subPatternArray.AppendL(tempSubPattern);
}
}
}
return 0;
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::CreateMatchPatternDetailsAndPoolsL
// Creates the Matchpattern aSeq in iMatchPatternDetails.
// Returns the index of the sequence in iMatchPatternDetails
// ----------------------------------------------------------------------------
TInt CPcsAlgorithm1FilterHelper::CreateMatchPatternDetailsAndPoolsL(TDesC* aSeq)
{
TInt indexInMatchPatternDetails = FindSequence(aSeq);
if ( indexInMatchPatternDetails == KErrNotFound )
{
// sequence not found, add it to array
TPsPatternDetails* tempPatternDetailsInstance = new ( ELeave ) TPsPatternDetails;
//TInt len = aPatternSequence[cnt]->Length();
tempPatternDetailsInstance->matchPattern = HBufC::NewL(aSeq->Length());
tempPatternDetailsInstance->matchPattern->Des().Copy(*(aSeq));
tempPatternDetailsInstance->firstOccurence = -1; //RAVIKIRAN
// Pools doesn't exist for this sequence..
RPointerArray<CPsData> *tempPsDataArray = new (ELeave) RPointerArray<CPsData> ();
tempPatternDetailsInstance->poolIndex = iMatchPatternPools.Count();
iMatchPatternDetails.Append(tempPatternDetailsInstance);
iMatchPatternPools.Append(tempPsDataArray);
return (iMatchPatternDetails.Count() - 1);
}
else
{
// Pool already exists for this sequence, get the correct index and add the result
return indexInMatchPatternDetails;
}
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::GetResults
//
// ----------------------------------------------------------------------------
void CPcsAlgorithm1FilterHelper::GetResults(RPointerArray<CPsData>& aSearchResults)
{
// No results, simply return
if(iResultCount == -1)
return;
// Sort sequences
TLinearOrder<TPsPatternDetails> rule( ComparePsPattern );
iMatchPatternDetails.Sort(rule);
if(iSortType == EAlphabetical)
{
// Return the results stored in single array
for(TInt i = 0; i < iMatchPatternPools[0]->Count(); i++)
aSearchResults.Append((*(iMatchPatternPools[0]))[i]);
// Clear the match pattern pool for the next data store
iMatchPatternPools[0]->Reset();
}
else
{
TInt firstOccurenceTracker = 0;
for(TInt i = 0; i < iMatchPatternDetails.Count(); i++)
{
// Get the mapping pool index for this sequence
TInt index = iMatchPatternDetails[i]->poolIndex;
TInt j = 0;
for(; j < iMatchPatternPools[index]->Count(); j++)
{
aSearchResults.Append((*(iMatchPatternPools[index]))[j]);
}
// Check the sub patterns
for(TInt k =0 ; k < iMatchPatternDetails[i]->subPatternArray.Count(); k++)
{
HBufC* temporseq = iMatchPatternDetails[i]->subPatternArray[k]->matchPattern;
TRAP_IGNORE( UpdateForSubSequencesL( *temporseq,
firstOccurenceTracker +
iMatchPatternDetails[i]->subPatternArray[k]->firstOccurenceInThisPattern ) );
}
if(iMatchPatternDetails[i]->firstOccurence == -1)
iMatchPatternDetails[i]->firstOccurence = firstOccurenceTracker;
firstOccurenceTracker = firstOccurenceTracker + j;
}
}
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::GetPatternsL
//
// ----------------------------------------------------------------------------
void CPcsAlgorithm1FilterHelper::GetPatternsL(RPointerArray<CPsPattern>& aPatternSet)
{
// Sort sequences
TLinearOrder<TPsPatternDetails> rule( ComparePsPattern );
iMatchPatternDetails.Sort(rule);
for(TInt i = 0; i < iMatchPatternDetails.Count(); i++)
{
CPsPattern *tempPattern = CPsPattern::NewL();
// Copy the sequence
tempPattern->SetPatternL(*(iMatchPatternDetails[i]->matchPattern));
tempPattern->SetFirstIndex(iMatchPatternDetails[i]->firstOccurence);
aPatternSet.Append(tempPattern);
}
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::FindSequence
// Searches for for aSeq in iMatchPatternDetails and returns index
// where input sequence is found. Returns -1 if not found
// ----------------------------------------------------------------------------
TInt CPcsAlgorithm1FilterHelper::FindSequence(TDesC* aSeq)
{
TBuf<KPsQueryMaxLen> seqBuf;
seqBuf.Append(*aSeq);
TInt j = 0;
for( ; j < iMatchPatternDetails.Count(); j++)
{
TBuf<KPsQueryMaxLen> matchPatternBuf;
matchPatternBuf.Copy((iMatchPatternDetails[j]->matchPattern->Des()));
if ( CPcsAlgorithm1Utils::MyCompareC(seqBuf, matchPatternBuf) == 0 )
break;
}
if( j == iMatchPatternDetails.Count())
return KErrNotFound;
else
return j;
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::FindSubSequence
// Searches for for seq in subpatterns of iMatchPatternDetails[aPatternIndex]
// and returns index where input sequence is found.
// Returns -1 if not found
// ----------------------------------------------------------------------------
TInt CPcsAlgorithm1FilterHelper::FindSubSequence(TDesC* aSeq,TInt aPatternIndex)
{
TBuf<KPsQueryMaxLen> seqBuf;
seqBuf.Append(*aSeq);
TInt j = 0;
for( ; j < iMatchPatternDetails[aPatternIndex]->subPatternArray.Count(); j++)
{
TBuf<KPsQueryMaxLen> matchPatternBuf;
matchPatternBuf.Copy((iMatchPatternDetails[aPatternIndex]->subPatternArray[j]->matchPattern->Des()));
if ( CPcsAlgorithm1Utils::MyCompareC(seqBuf, matchPatternBuf) == 0 )
break;
}
if( j == iMatchPatternDetails[aPatternIndex]->subPatternArray.Count())
return KErrNotFound;
else
return j;
}
// ----------------------------------------------------------------------------
// CPcsAlgorithm1FilterHelper::UpdateForSubSequencesL
// Searches for all the subsequences of aSeq and updates the aFirstOccrVal in
// iMatchPatternDetails.
//
// For ex: if aSeq = "ABC" and aFirstOccrVal= 2,
// then, firstOccurence of all substring sequences ("A", "AB", "ABC")
// in iMatchPatternDetails will be set to 2
// ----------------------------------------------------------------------------
void CPcsAlgorithm1FilterHelper::UpdateForSubSequencesL(TDesC& aSeq,TInt aFirstOccrVal)
{
HBufC* tempSequence = HBufC::NewL(aSeq.Length() + 1);
for ( TInt i =0; i<aSeq.Length(); i++ )
{
// Get the next substring in tempSequence
tempSequence->Des().Append(aSeq[i]);
// Find if this sequence exist in iMatchPatternDetails
TInt patternIndex = FindSequence(tempSequence);
//If the sequence exits and firstOccurence == -1, then set it to aFirstOccrVal
if((patternIndex != KErrNotFound) && (iMatchPatternDetails[patternIndex]->firstOccurence == -1))
{
iMatchPatternDetails[patternIndex]->firstOccurence = aFirstOccrVal;
}
}
delete tempSequence;
tempSequence = NULL;
return;
}
// END OF FILE