blastdb.cpp

   1 /*
   2  *  blastdb.cpp
   3  *
   4  *
   5  *  Created by Pat Schloss on 12/22/08.
   6  *  Copyright 2008 Patrick D. Schloss. All rights reserved.
   7  *
   8  */
   9
  10
  11 #include "database.hpp"
  12 #include "sequence.hpp"
  13 #include "blastdb.hpp"
  14
  15 /**************************************************************************************************/
  16
  17 BlastDB::BlastDB(float gO, float gE, float m, float mM) : Database(),
  18 gapOpen(gO), gapExtend(gE), match(m), misMatch(mM) {
  19
  20         count = 0;
  21
  22         int randNumber = rand();
  23         dbFileName = toString(randNumber) + ".template.unaligned.fasta";
  24         queryFileName = toString(randNumber) + ".candidate.unaligned.fasta";
  25         blastFileName = toString(randNumber) + ".blast";
  26
  27 }
  28 /**************************************************************************************************/
  29
  30 BlastDB::BlastDB() : Database() {
  31         try {
  32                 count = 0;
  33
  34                 int randNumber = rand();
  35                 dbFileName = toString(randNumber) + ".template.unaligned.fasta";
  36                 queryFileName = toString(randNumber) + ".candidate.unaligned.fasta";
  37                 blastFileName = toString(randNumber) + ".blast";
  38         }
  39         catch(exception& e) {
  40                 m->errorOut(e, "BlastDB", "BlastDB");
  41                 exit(1);
  42         }
  43 }
  44
  45 /**************************************************************************************************/
  46
  47 BlastDB::~BlastDB(){
  48         try{
  49                 remove(queryFileName.c_str());                          //      let's clean stuff up and remove the temp files
  50                 remove(dbFileName.c_str());                                     //      let's clean stuff up and remove the temp files
  51                 remove((dbFileName+".nsq").c_str());                                    //      let's clean stuff up and remove the temp files
  52                 remove((dbFileName+".nsi").c_str());                                    //      let's clean stuff up and remove the temp files
  53                 remove((dbFileName+".nsd").c_str());                                    //      let's clean stuff up and remove the temp files
  54                 remove((dbFileName+".nin").c_str());                                    //      let's clean stuff up and remove the temp files
  55                 remove((dbFileName+".nhr").c_str());                                    //      let's clean stuff up and remove the temp files
  56                 remove(blastFileName.c_str());                          //      let's clean stuff up and remove the temp files
  57         }
  58         catch(exception& e) {
  59                 m->errorOut(e, "BlastDB", "~BlastDB");
  60                 exit(1);
  61         }
  62 }
  63 /**************************************************************************************************/
  64 //assumes you have added all the template sequences using the addSequence function and run generateDB.
  65 vector<int> BlastDB::findClosestSequences(Sequence* seq, int n) {
  66         try{
  67                 vector<int> topMatches;
  68
  69                 ofstream queryFile;
  70                 m->openOutputFile((queryFileName+seq->getName()), queryFile);
  71                 queryFile << '>' << seq->getName() << endl;
  72                 queryFile << seq->getUnaligned() << endl;
  73                 queryFile.close();
  74
  75
  76                 //      the goal here is to quickly survey the database to find the closest match.  To do this we are using the default
  77                 //      wordsize used in megablast.  I'm sure we're sacrificing accuracy for speed, but anyother way would take way too
  78                 //      long.  With this setting, it seems comparable in speed to the suffix tree approach.
  79
  80                 string blastCommand = path + "blast/bin/blastall -p blastn -d " + dbFileName + " -m 8 -W 28 -v " + toString(n) + " -b " + toString(n);;
  81                 blastCommand += (" -i " + (queryFileName+seq->getName()) + " -o " + blastFileName+seq->getName());
  82                 system(blastCommand.c_str());
  83
  84                 ifstream m8FileHandle;
  85                 m->openInputFile(blastFileName+seq->getName(), m8FileHandle, "no error");
  86
  87                 string dummy;
  88                 int templateAccession;
  89                 m->gobble(m8FileHandle);
  90
  91                 while(!m8FileHandle.eof()){
  92                         m8FileHandle >> dummy >> templateAccession >> searchScore;
  93
  94                         //get rest of junk in line
  95                         while (!m8FileHandle.eof())     {       char c = m8FileHandle.get(); if (c == 10 || c == 13){   break;  }       }
  96
  97                         m->gobble(m8FileHandle);
  98                         topMatches.push_back(templateAccession);
  99                 }
 100                 m8FileHandle.close();
 101                 remove((queryFileName+seq->getName()).c_str());
 102                 remove((blastFileName+seq->getName()).c_str());
 103
 104                 return topMatches;
 105         }
 106         catch(exception& e) {
 107                 m->errorOut(e, "BlastDB", "findClosestSequences");
 108                 exit(1);
 109         }
 110
 111 }
 112 /**************************************************************************************************/
 113 //assumes you have added all the template sequences using the addSequence function and run generateDB.
 114 vector<int> BlastDB::findClosestMegaBlast(Sequence* seq, int n) {
 115         try{
 116                 vector<int> topMatches;
 117
 118                 ofstream queryFile;
 119
 120                 m->openOutputFile((queryFileName+seq->getName()), queryFile);
 121                 queryFile << '>' << seq->getName() << endl;
 122                 queryFile << seq->getUnaligned() << endl;
 123                 queryFile.close();
 124
 125                 //      the goal here is to quickly survey the database to find the closest match.  To do this we are using the default
 126                 //      wordsize used in megablast.  I'm sure we're sacrificing accuracy for speed, but anyother way would take way too
 127                 //      long.  With this setting, it seems comparable in speed to the suffix tree approach.
 128
 129                 string blastCommand = path + "blast/bin/megablast -e 1e-10 -d " + dbFileName + " -m 8 -b " + toString(n) + " -v " + toString(n); //-W 28 -p blastn
 130                 blastCommand += (" -i " + (queryFileName+seq->getName()) + " -o " + blastFileName+seq->getName());
 131                 system(blastCommand.c_str());
 132
 133                 ifstream m8FileHandle;
 134                 m->openInputFile(blastFileName+seq->getName(), m8FileHandle, "no error");
 135
 136                 string dummy;
 137                 int templateAccession;
 138                 m->gobble(m8FileHandle);
 139
 140                 while(!m8FileHandle.eof()){
 141                         m8FileHandle >> dummy >> templateAccession >> searchScore;
 142                         //cout << templateAccession << '\t' << searchScore << endl;
 143
 144                         //get rest of junk in line
 145                         while (!m8FileHandle.eof())     {       char c = m8FileHandle.get(); if (c == 10 || c == 13){   break;  }       }
 146
 147                         m->gobble(m8FileHandle);
 148                         topMatches.push_back(templateAccession);
 149                         megaScores.push_back(searchScore);
 150 //cout << templateAccession << endl;
 151                 }
 152                 m8FileHandle.close();
 153                 remove((queryFileName+seq->getName()).c_str());
 154                 remove((blastFileName+seq->getName()).c_str());
 155 //cout << "\n" ;
 156                 return topMatches;
 157         }
 158         catch(exception& e) {
 159                 m->errorOut(e, "BlastDB", "findClosestMegaBlast");
 160                 exit(1);
 161         }
 162 }
 163 /**************************************************************************************************/
 164 void BlastDB::addSequence(Sequence seq) {
 165         try {
 166
 167                 ofstream unalignedFastaFile;
 168                 m->openOutputFileAppend(dbFileName, unalignedFastaFile);
 169
 170                 //      generating a fasta file with unaligned template
 171                 unalignedFastaFile << '>' << count << endl;                                     //      sequences, which will be input to formatdb
 172                 unalignedFastaFile << seq.getUnaligned() << endl;
 173                 unalignedFastaFile.close();
 174
 175                 count++;
 176         }
 177         catch(exception& e) {
 178                 m->errorOut(e, "BlastDB", "addSequence");
 179                 exit(1);
 180         }
 181 }
 182 /**************************************************************************************************/
 183 void BlastDB::generateDB() {
 184         try {
 185
 186                 //m->mothurOut("Generating the temporary BLAST database...\t"); cout.flush();
 187
 188                 path = m->argv;
 189                 path = path.substr(0, (path.find_last_of('m')));
 190
 191                 string formatdbCommand = path + "blast/bin/formatdb -p F -o T -i " + dbFileName;        //      format the database, -o option gives us the ability
 192                 system(formatdbCommand.c_str());                                                                //      to get the right sequence names, i think. -p F
 193                                                                                                                                         //      option tells formatdb that seqs are DNA, not prot
 194                 //m->mothurOut("DONE."); m->mothurOutEndLine(); m->mothurOutEndLine(); cout.flush();
 195         }
 196         catch(exception& e) {
 197                 m->errorOut(e, "BlastDB", "generateDB");
 198                 exit(1);
 199         }
 200 }
 201 /**************************************************************************************************/
 202
 203 /**************************************************************************************************/
 204