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BamMultiReader_p.cpp
872 lines (707 loc) · 30 KB
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BamMultiReader_p.cpp
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// ***************************************************************************
// BamMultiReader_p.cpp (c) 2010 Derek Barnett, Erik Garrison
// Marth Lab, Department of Biology, Boston College
// ---------------------------------------------------------------------------
// Last modified: 24 July 2013 (DB)
// ---------------------------------------------------------------------------
// Functionality for simultaneously reading multiple BAM files
// *************************************************************************
#include "api/BamAlignment.h"
#include "api/BamMultiReader.h"
#include "api/SamConstants.h"
#include "api/algorithms/Sort.h"
#include "api/internal/bam/BamMultiReader_p.h"
using namespace BamTools;
using namespace BamTools::Internal;
#include <algorithm>
#include <fstream>
#include <iostream>
#include <iterator>
#include <sstream>
using namespace std;
// ctor
BamMultiReaderPrivate::BamMultiReaderPrivate(void)
: m_alignmentCache(0)
, m_hasUserMergeOrder(false)
, m_mergeOrder(BamMultiReader::RoundRobinMerge)
{ }
// dtor
BamMultiReaderPrivate::~BamMultiReaderPrivate(void) {
Close();
}
// close all BAM files
bool BamMultiReaderPrivate::Close(void) {
m_errorString.clear();
if ( CloseFiles(Filenames()) )
return true;
else {
const string currentError = m_errorString;
const string message = string("error encountered while closing all files: \n\t") + currentError;
SetErrorString("BamMultiReader::Close", message);
return false;
}
}
// close requested BAM file
bool BamMultiReaderPrivate::CloseFile(const string& filename) {
m_errorString.clear();
vector<string> filenames(1, filename);
if ( CloseFiles(filenames) )
return true;
else {
const string currentError = m_errorString;
const string message = string("error while closing file: ") + filename + "\n" + currentError;
SetErrorString("BamMultiReader::CloseFile", message);
return false;
}
}
// close requested BAM files
bool BamMultiReaderPrivate::CloseFiles(const vector<string>& filenames) {
bool errorsEncountered = false;
m_errorString.clear();
// iterate over filenames
vector<string>::const_iterator filesIter = filenames.begin();
vector<string>::const_iterator filesEnd = filenames.end();
for ( ; filesIter != filesEnd; ++filesIter ) {
const string& filename = (*filesIter);
if ( filename.empty() ) continue;
// iterate over readers
vector<MergeItem>::iterator readerIter = m_readers.begin();
vector<MergeItem>::iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// if reader matches requested filename
if ( reader->GetFilename() == filename ) {
// remove reader's entry from alignment cache
m_alignmentCache->Remove(reader);
// clean up reader & its alignment
if ( !reader->Close() ) {
m_errorString.append(1, '\t');
m_errorString.append(reader->GetErrorString());
m_errorString.append(1, '\n');
errorsEncountered = true;
}
delete reader;
reader = 0;
// delete reader's alignment entry
BamAlignment* alignment = item.Alignment;
delete alignment;
alignment = 0;
// remove reader from reader list
m_readers.erase(readerIter);
// on match, just go on to next filename
// (no need to keep looking and item iterator is invalid now anyway)
break;
}
}
}
// make sure we clean up properly if all readers were closed
if ( m_readers.empty() ) {
// clean up merger
if ( m_alignmentCache ) {
m_alignmentCache->Clear();
delete m_alignmentCache;
m_alignmentCache = 0;
}
// reset merge flags
m_hasUserMergeOrder = false;
m_mergeOrder = BamMultiReader::RoundRobinMerge;
}
// return whether all readers closed OK
return !errorsEncountered;
}
// creates index files for BAM files that don't have them
bool BamMultiReaderPrivate::CreateIndexes(const BamIndex::IndexType& type) {
bool errorsEncountered = false;
m_errorString.clear();
// iterate over readers
vector<MergeItem>::iterator itemIter = m_readers.begin();
vector<MergeItem>::iterator itemEnd = m_readers.end();
for ( ; itemIter != itemEnd; ++itemIter ) {
MergeItem& item = (*itemIter);
BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// if reader doesn't have an index, create one
if ( !reader->HasIndex() ) {
if ( !reader->CreateIndex(type) ) {
m_errorString.append(1, '\t');
m_errorString.append(reader->GetErrorString());
m_errorString.append(1, '\n');
errorsEncountered = true;
}
}
}
// check for errors encountered before returning success/fail
if ( errorsEncountered ) {
const string currentError = m_errorString;
const string message = string("error while creating index files: ") + "\n" + currentError;
SetErrorString("BamMultiReader::CreateIndexes", message);
return false;
} else
return true;
}
IMultiMerger* BamMultiReaderPrivate::CreateAlignmentCache(void) {
// if no merge order set explicitly, use SAM header to lookup proper order
if ( !m_hasUserMergeOrder ) {
// fetch SamHeader from BAM files
SamHeader header = GetHeader();
// if BAM files are sorted by position
if ( header.SortOrder == Constants::SAM_HD_SORTORDER_COORDINATE )
m_mergeOrder = BamMultiReader::MergeByCoordinate;
// if BAM files are sorted by read name
else if ( header.SortOrder == Constants::SAM_HD_SORTORDER_QUERYNAME )
m_mergeOrder = BamMultiReader::MergeByName;
// otherwise, sorting is either "unknown" or marked as "unsorted"
else
m_mergeOrder = BamMultiReader::RoundRobinMerge;
}
// use current merge order to create proper 'multi-merger'
switch ( m_mergeOrder ) {
// merge BAM files by position
case BamMultiReader::MergeByCoordinate :
return new MultiMerger<Algorithms::Sort::ByPosition>();
// merge BAM files by read name
case BamMultiReader::MergeByName :
return new MultiMerger<Algorithms::Sort::ByName>();
// sorting is "unknown", "unsorted" or "ignored"... so use unsorted merger
case BamMultiReader::RoundRobinMerge :
return new MultiMerger<Algorithms::Sort::Unsorted>();
// unknown merge order, can't create merger
default:
return 0;
}
}
const vector<string> BamMultiReaderPrivate::Filenames(void) const {
// init filename container
vector<string> filenames;
filenames.reserve( m_readers.size() );
// iterate over readers
vector<MergeItem>::const_iterator itemIter = m_readers.begin();
vector<MergeItem>::const_iterator itemEnd = m_readers.end();
for ( ; itemIter != itemEnd; ++itemIter ) {
const MergeItem& item = (*itemIter);
const BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// store filename if not empty
const string& filename = reader->GetFilename();
if ( !filename.empty() )
filenames.push_back(filename);
}
// return result
return filenames;
}
string BamMultiReaderPrivate::GetErrorString(void) const {
return m_errorString;
}
SamHeader BamMultiReaderPrivate::GetHeader(void) const {
const string& text = GetHeaderText();
return SamHeader(text);
}
// makes a virtual, unified header for all the bam files in the multireader
string BamMultiReaderPrivate::GetHeaderText(void) const {
// N.B. - right now, simply copies all header data from first BAM,
// and then appends RG's from other BAM files
// TODO: make this more intelligent wrt other header lines/fields
// if no readers open
const size_t numReaders = m_readers.size();
if ( numReaders == 0 ) return string();
// retrieve first reader's header
const MergeItem& firstItem = m_readers.front();
const BamReader* reader = firstItem.Reader;
if ( reader == 0 ) return string();
SamHeader mergedHeader = reader->GetHeader();
// iterate over any remaining readers (skipping the first)
for ( size_t i = 1; i < numReaders; ++i ) {
const MergeItem& item = m_readers.at(i);
const BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// retrieve current reader's header
const SamHeader currentHeader = reader->GetHeader();
// append current reader's RG entries to merged header
// N.B. - SamReadGroupDictionary handles duplicate-checking
mergedHeader.ReadGroups.Add(currentHeader.ReadGroups);
// TODO: merge anything else??
}
// return stringified header
return mergedHeader.ToString();
}
BamMultiReader::MergeOrder BamMultiReaderPrivate::GetMergeOrder(void) const {
return m_mergeOrder;
}
// get next alignment among all files
bool BamMultiReaderPrivate::GetNextAlignment(BamAlignment& al) {
return PopNextCachedAlignment(al, true);
}
// get next alignment among all files without parsing character data from alignments
bool BamMultiReaderPrivate::GetNextAlignmentCore(BamAlignment& al) {
return PopNextCachedAlignment(al, false);
}
// ---------------------------------------------------------------------------------------
//
// NB: The following GetReferenceX() functions assume that we have identical
// references for all BAM files. We enforce this by invoking the
// ValidateReaders() method to verify that our reference data is the same
// across all files on Open - so we will not encounter a situation in which
// there is a mismatch and we are still live.
//
// ---------------------------------------------------------------------------------------
// returns the number of reference sequences
int BamMultiReaderPrivate::GetReferenceCount(void) const {
// handle empty multireader
if ( m_readers.empty() ) return 0;
// return reference count from first reader
const MergeItem& item = m_readers.front();
const BamReader* reader = item.Reader;
if ( reader == 0 ) return 0;
else
return reader->GetReferenceCount();
}
// returns vector of reference objects
const RefVector BamMultiReaderPrivate::GetReferenceData(void) const {
// handle empty multireader
if ( m_readers.empty() ) return RefVector();
// return reference data from first BamReader
const MergeItem& item = m_readers.front();
const BamReader* reader = item.Reader;
if ( reader == 0 ) return RefVector();
else
return reader->GetReferenceData();
}
// returns refID from reference name
int BamMultiReaderPrivate::GetReferenceID(const string& refName) const {
// handle empty multireader
if ( m_readers.empty() ) return -1;
// return reference ID from first BamReader
const MergeItem& item = m_readers.front();
const BamReader* reader = item.Reader;
if ( reader == 0 ) return -1;
else
return reader->GetReferenceID(refName);
}
// ---------------------------------------------------------------------------------------
// returns true if all readers have index data available
// this is useful to indicate whether Jump() or SetRegion() are possible
bool BamMultiReaderPrivate::HasIndexes(void) const {
// handle empty multireader
if ( m_readers.empty() )
return false;
bool result = true;
// iterate over readers
vector<MergeItem>::const_iterator readerIter = m_readers.begin();
vector<MergeItem>::const_iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
const MergeItem& item = (*readerIter);
const BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// see if current reader has index data
result &= reader->HasIndex();
}
return result;
}
// returns true if multireader has open readers
bool BamMultiReaderPrivate::HasOpenReaders(void) {
// iterate over readers
vector<MergeItem>::const_iterator readerIter = m_readers.begin();
vector<MergeItem>::const_iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
const MergeItem& item = (*readerIter);
const BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// return true whenever an open reader is found
if ( reader->IsOpen() ) return true;
}
// no readers open
return false;
}
// performs random-access jump using (refID, position) as a left-bound
bool BamMultiReaderPrivate::Jump(int refID, int position) {
// NB: While it may make sense to track readers in which we can
// successfully Jump, in practice a failure of Jump means "no
// alignments here." It makes sense to simply accept the failure,
// UpdateAlignments(), and continue.
// iterate over readers
vector<MergeItem>::iterator readerIter = m_readers.begin();
vector<MergeItem>::iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// jump in each BamReader to position of interest
reader->Jump(refID, position);
}
// returns status of cache update
return UpdateAlignmentCache();
}
// locate (& load) index files for BAM readers that don't already have one loaded
bool BamMultiReaderPrivate::LocateIndexes(const BamIndex::IndexType& preferredType) {
bool errorsEncountered = false;
m_errorString.clear();
// iterate over readers
vector<MergeItem>::iterator readerIter = m_readers.begin();
vector<MergeItem>::iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// if reader has no index, try to locate one
if ( !reader->HasIndex() ) {
if ( !reader->LocateIndex(preferredType) ) {
m_errorString.append(1, '\t');
m_errorString.append(reader->GetErrorString());
m_errorString.append(1, '\n');
errorsEncountered = true;
}
}
}
// check for errors encountered before returning success/fail
if ( errorsEncountered ) {
const string currentError = m_errorString;
const string message = string("error while locating index files: ") + "\n" + currentError;
SetErrorString("BamMultiReader::LocatingIndexes", message);
return false;
} else
return true;
}
// opens BAM files
bool BamMultiReaderPrivate::Open(const vector<string>& filenames) {
m_errorString.clear();
// put all current readers back at beginning (refreshes alignment cache)
if ( !Rewind() ) {
const string currentError = m_errorString;
const string message = string("unable to rewind existing readers: \n\t") + currentError;
SetErrorString("BamMultiReader::Open", message);
return false;
}
// iterate over filenames
bool errorsEncountered = false;
vector<string>::const_iterator filenameIter = filenames.begin();
vector<string>::const_iterator filenameEnd = filenames.end();
for ( ; filenameIter != filenameEnd; ++filenameIter ) {
const string& filename = (*filenameIter);
if ( filename.empty() ) continue;
// attempt to open BamReader
BamReader* reader = new BamReader;
const bool readerOpened = reader->Open(filename);
// if opened OK, store it
if ( readerOpened )
m_readers.push_back( MergeItem(reader, new BamAlignment) );
// otherwise store error & clean up invalid reader
else {
m_errorString.append(1, '\t');
m_errorString += string("unable to open file: ") + filename;
m_errorString.append(1, '\n');
errorsEncountered = true;
delete reader;
reader = 0;
}
}
// check for errors while opening
if ( errorsEncountered ) {
const string currentError = m_errorString;
const string message = string("unable to open all files: \t\n") + currentError;
SetErrorString("BamMultiReader::Open", message);
return false;
}
// check for BAM file consistency
if ( !ValidateReaders() ) {
const string currentError = m_errorString;
const string message = string("unable to open inconsistent files: \t\n") + currentError;
SetErrorString("BamMultiReader::Open", message);
return false;
}
// update alignment cache
return UpdateAlignmentCache();
}
bool BamMultiReaderPrivate::OpenFile(const std::string& filename) {
vector<string> filenames(1, filename);
if ( Open(filenames) )
return true;
else {
const string currentError = m_errorString;
const string message = string("could not open file: ") + filename + "\n\t" + currentError;
SetErrorString("BamMultiReader::OpenFile", message);
return false;
}
}
bool BamMultiReaderPrivate::OpenIndexes(const vector<string>& indexFilenames) {
// TODO: This needs to be cleaner - should not assume same order.
// And either way, shouldn't start at first reader. Should start at
// first reader without an index?
// make sure same number of index filenames as readers
if ( m_readers.size() != indexFilenames.size() ) {
const string message("size of index file list does not match current BAM file count");
SetErrorString("BamMultiReader::OpenIndexes", message);
return false;
}
bool errorsEncountered = false;
m_errorString.clear();
// iterate over BamReaders
vector<string>::const_iterator indexFilenameIter = indexFilenames.begin();
vector<string>::const_iterator indexFilenameEnd = indexFilenames.end();
vector<MergeItem>::iterator readerIter = m_readers.begin();
vector<MergeItem>::iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
// open index filename on reader
if ( reader ) {
const string& indexFilename = (*indexFilenameIter);
if ( !reader->OpenIndex(indexFilename) ) {
m_errorString.append(1, '\t');
m_errorString += reader->GetErrorString();
m_errorString.append(1, '\n');
errorsEncountered = true;
}
}
// increment filename iterator, skip if no more index files to open
if ( ++indexFilenameIter == indexFilenameEnd )
break;
}
// return success/fail
if ( errorsEncountered ) {
const string currentError = m_errorString;
const string message = string("could not open all index files: \n\t") + currentError;
SetErrorString("BamMultiReader::OpenIndexes", message);
return false;
} else
return true;
}
bool BamMultiReaderPrivate::PopNextCachedAlignment(BamAlignment& al, const bool needCharData) {
// skip if no alignments available
if ( m_alignmentCache == 0 || m_alignmentCache->IsEmpty() )
return false;
// pop next merge item entry from cache
MergeItem item = m_alignmentCache->TakeFirst();
BamReader* reader = item.Reader;
BamAlignment* alignment = item.Alignment;
if ( reader == 0 || alignment == 0 )
return false;
// set char data if requested
if ( needCharData ) {
alignment->BuildCharData();
alignment->Filename = reader->GetFilename();
}
// store cached alignment into destination parameter (by copy)
al = *alignment;
// load next alignment from reader & store in cache
SaveNextAlignment(reader, alignment);
return true;
}
// returns BAM file pointers to beginning of alignment data & resets alignment cache
bool BamMultiReaderPrivate::Rewind(void) {
// skip if no readers open
if ( m_readers.empty() )
return true;
// attempt to rewind files
if ( !RewindReaders() ) {
const string currentError = m_errorString;
const string message = string("could not rewind readers: \n\t") + currentError;
SetErrorString("BamMultiReader::Rewind", message);
return false;
}
// return status of cache update
return UpdateAlignmentCache();
}
// returns BAM file pointers to beginning of alignment data
bool BamMultiReaderPrivate::RewindReaders(void) {
m_errorString.clear();
bool errorsEncountered = false;
// iterate over readers
vector<MergeItem>::iterator readerIter = m_readers.begin();
vector<MergeItem>::iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// attempt rewind on BamReader
if ( !reader->Rewind() ) {
m_errorString.append(1, '\t');
m_errorString.append( reader->GetErrorString() );
m_errorString.append(1, '\n');
errorsEncountered = true;
}
}
return !errorsEncountered;
}
void BamMultiReaderPrivate::SaveNextAlignment(BamReader* reader, BamAlignment* alignment) {
// if can read alignment from reader, store in cache
//
// N.B. - lazy building of alignment's char data - populated only:
// automatically by alignment cache to maintain its sorting OR
// on demand from client call to future call to GetNextAlignment()
if ( reader->GetNextAlignmentCore(*alignment) )
m_alignmentCache->Add( MergeItem(reader, alignment) );
}
bool BamMultiReaderPrivate::SetExplicitMergeOrder(BamMultiReader::MergeOrder order) {
// set new merge flags
m_hasUserMergeOrder = true;
m_mergeOrder = order;
// remove any existing merger (storing any existing data sitting in the cache)
vector<MergeItem> currentCacheData;
if ( m_alignmentCache ) {
while ( !m_alignmentCache->IsEmpty() )
currentCacheData.push_back( m_alignmentCache->TakeFirst() );
delete m_alignmentCache;
m_alignmentCache = 0;
}
// create new cache using the new merge flags
m_alignmentCache = CreateAlignmentCache();
if ( m_alignmentCache == 0 ) {
SetErrorString("BamMultiReader::SetExplicitMergeOrder", "requested order is unrecognized");
return false;
}
// push current data onto new cache
vector<MergeItem>::const_iterator readerIter = currentCacheData.begin();
vector<MergeItem>::const_iterator readerEnd = currentCacheData.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
const MergeItem& item = (*readerIter);
m_alignmentCache->Add(item);
}
// return success
return true;
}
void BamMultiReaderPrivate::SetErrorString(const string& where, const string& what) const {
static const string SEPARATOR = ": ";
m_errorString = where + SEPARATOR + what;
}
bool BamMultiReaderPrivate::SetRegion(const BamRegion& region) {
// NB: While it may make sense to track readers in which we can
// successfully SetRegion, In practice a failure of SetRegion means "no
// alignments here." It makes sense to simply accept the failure,
// UpdateAlignments(), and continue.
// iterate over alignments
vector<MergeItem>::iterator readerIter = m_readers.begin();
vector<MergeItem>::iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// set region of interest
reader->SetRegion(region);
}
// return status of cache update
return UpdateAlignmentCache();
}
// updates our alignment cache
bool BamMultiReaderPrivate::UpdateAlignmentCache(void) {
// create alignment cache if not created yet
if ( m_alignmentCache == 0 ) {
m_alignmentCache = CreateAlignmentCache();
if ( m_alignmentCache == 0 ) {
SetErrorString("BamMultiReader::UpdateAlignmentCache", "unable to create new alignment cache");
return false;
}
}
// clear any prior cache data
m_alignmentCache->Clear();
// iterate over readers
vector<MergeItem>::iterator readerIter = m_readers.begin();
vector<MergeItem>::iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
BamAlignment* alignment = item.Alignment;
if ( reader == 0 || alignment == 0 ) continue;
// save next alignment from each reader in cache
SaveNextAlignment(reader, alignment);
}
// if we get here, ok
return true;
}
// ValidateReaders checks that all the readers point to BAM files representing
// alignments against the same set of reference sequences, and that the
// sequences are identically ordered. If these checks fail the operation of
// the multireader is undefined, so we force program exit.
bool BamMultiReaderPrivate::ValidateReaders(void) const {
m_errorString.clear();
// skip if 0 or 1 readers opened
if ( m_readers.empty() || (m_readers.size() == 1) )
return true;
// retrieve first reader
const MergeItem& firstItem = m_readers.front();
const BamReader* firstReader = firstItem.Reader;
if ( firstReader == 0 ) return false;
// retrieve first reader's header data
const SamHeader& firstReaderHeader = firstReader->GetHeader();
const string& firstReaderSortOrder = firstReaderHeader.SortOrder;
// retrieve first reader's reference data
const RefVector& firstReaderRefData = firstReader->GetReferenceData();
const int firstReaderRefCount = firstReader->GetReferenceCount();
const int firstReaderRefSize = firstReaderRefData.size();
// iterate over all readers
vector<MergeItem>::const_iterator readerIter = m_readers.begin();
vector<MergeItem>::const_iterator readerEnd = m_readers.end();
for ( ; readerIter != readerEnd; ++readerIter ) {
const MergeItem& item = (*readerIter);
BamReader* reader = item.Reader;
if ( reader == 0 ) continue;
// get current reader's header data
const SamHeader& currentReaderHeader = reader->GetHeader();
const string& currentReaderSortOrder = currentReaderHeader.SortOrder;
// check compatible sort order
if ( currentReaderSortOrder != firstReaderSortOrder ) {
const string message = string("mismatched sort order in ") + reader->GetFilename() +
", expected " + firstReaderSortOrder +
", but found " + currentReaderSortOrder;
SetErrorString("BamMultiReader::ValidateReaders", message);
return false;
}
// get current reader's reference data
const RefVector currentReaderRefData = reader->GetReferenceData();
const int currentReaderRefCount = reader->GetReferenceCount();
const int currentReaderRefSize = currentReaderRefData.size();
// init reference data iterators
RefVector::const_iterator firstRefIter = firstReaderRefData.begin();
RefVector::const_iterator firstRefEnd = firstReaderRefData.end();
RefVector::const_iterator currentRefIter = currentReaderRefData.begin();
// compare reference counts from BamReader ( & container size, in case of BR error)
if ( (currentReaderRefCount != firstReaderRefCount) ||
(firstReaderRefSize != currentReaderRefSize) )
{
stringstream s("");
s << "mismatched reference count in " << reader->GetFilename()
<< ", expected " << firstReaderRefCount
<< ", but found " << currentReaderRefCount;
SetErrorString("BamMultiReader::ValidateReaders", s.str());
return false;
}
// this will be ok; we just checked above that we have identically-sized sets of references
// here we simply check if they are all, in fact, equal in content
while ( firstRefIter != firstRefEnd ) {
const RefData& firstRef = (*firstRefIter);
const RefData& currentRef = (*currentRefIter);
// compare reference name & length
if ( (firstRef.RefName != currentRef.RefName) ||
(firstRef.RefLength != currentRef.RefLength) )
{
stringstream s("");
s << "mismatched references found in" << reader->GetFilename()
<< "expected: " << endl;
// print first reader's reference data
RefVector::const_iterator refIter = firstReaderRefData.begin();
RefVector::const_iterator refEnd = firstReaderRefData.end();
for ( ; refIter != refEnd; ++refIter ) {
const RefData& entry = (*refIter);
stringstream s("");
s << entry.RefName << " " << endl;
}
s << "but found: " << endl;
// print current reader's reference data
refIter = currentReaderRefData.begin();
refEnd = currentReaderRefData.end();
for ( ; refIter != refEnd; ++refIter ) {
const RefData& entry = (*refIter);
s << entry.RefName << " " << entry.RefLength << endl;
}
SetErrorString("BamMultiReader::ValidateReaders", s.str());
return false;
}
// update iterators
++firstRefIter;
++currentRefIter;
}
}
// if we get here, everything checks out
return true;
}