private int[][][] getFullHashes(Sequence seq, int subKmerSize) {
int cutoff =
(int)
((long) Integer.MIN_VALUE
+ ((long) Integer.MAX_VALUE - (long) Integer.MIN_VALUE) / (long) REDUCTION);
// compute just direct hash of sequence
int[] hashes = Utils.computeSequenceHashes(seq.getString(), subKmerSize);
int count = 0;
for (int val : hashes) if (val <= cutoff) count++;
SortableIntPair[] completeHashAsPair = new SortableIntPair[count];
count = 0;
for (int iter = 0; iter < hashes.length; iter++)
if (hashes[iter] <= cutoff) {
completeHashAsPair[count] = new SortableIntPair(hashes[iter], iter);
count++;
}
// sort the results, sort is in place so no need to look at second
Arrays.sort(completeHashAsPair);
return storeAsArray(completeHashAsPair);
}
public OverlapInfo getFullScore(OrderKmerHashes s, double maxShiftPercent) {
int[][][] allKmerHashes = this.orderedHashes;
// get the kmers of the second sequence
int[][][] sAllKmerHashes = s.orderedHashes;
// get sizes
int size1 = this.size();
int size2 = s.size();
int kmerSize1 = this.seqLength;
int kmerSize2 = s.seqLength;
// init the ok regions
int valid1Lower = 0;
int valid1Upper = kmerSize1;
int valid2Lower = 0;
int valid2Upper = kmerSize2;
int medianShift = 0;
int overlapSize = Math.min(kmerSize1, kmerSize2);
int absMaxShiftInOverlap = Math.max(kmerSize1, kmerSize2);
int count = 0;
int[] posShift = new int[Math.min(size1, size2) / 8 + 1];
int[] pos1Index = new int[posShift.length];
int[] pos2Index = new int[posShift.length];
// check the repeat flag
int numScoringRepeats = 2;
if (maxShiftPercent <= 0) {
numScoringRepeats = 1;
maxShiftPercent = Math.abs(maxShiftPercent);
}
// refine multiple times to get better interval estimate
for (int repeat = 0; repeat < numScoringRepeats; repeat++) {
// init counters
count = 0;
int ii1 = 0;
int ii2 = 0;
int i1 = 0;
int i2 = 0;
// init the loop storage
int hash1 = 0;
int hash2 = 0;
int pos1;
int pos2;
// perform merge operation to get the shift and the kmer count
while (true) {
if (i1 >= allKmerHashes[ii1].length) {
ii1++;
i1 = 0;
// break if reached end
if (ii1 >= allKmerHashes.length) break;
}
if (i2 >= sAllKmerHashes[ii2].length) {
ii2++;
i2 = 0;
// break if reached end
if (ii2 >= sAllKmerHashes.length) break;
}
// get the values in the array
hash1 = allKmerHashes[ii1][i1][0];
pos1 = allKmerHashes[ii1][i1][1];
hash2 = sAllKmerHashes[ii2][i2][0];
pos2 = sAllKmerHashes[ii2][i2][1];
if (hash1 < hash2 || pos1 < valid1Lower || pos1 >= valid1Upper) i1++;
else if (hash2 < hash1 || pos2 < valid2Lower || pos2 >= valid2Upper) i2++;
else {
// check if current shift makes sense positionally
int currShift = pos2 - pos1;
if (Math.abs(currShift - medianShift) > absMaxShiftInOverlap) {
// do not record this shift and increase counter
i2++;
continue;
}
// adjust array size if needed
if (posShift.length <= count) {
posShift = Arrays.copyOf(posShift, posShift.length * 2);
pos1Index = Arrays.copyOf(pos1Index, pos1Index.length * 2);
pos2Index = Arrays.copyOf(pos2Index, pos2Index.length * 2);
}
// compute the shift
posShift[count] = currShift;
pos1Index[count] = pos1;
pos2Index[count] = pos2;
// if first round, store only first hit
if (repeat == 0) i1++;
i2++;
count++;
}
}
if (count <= 0) return new OverlapInfo(0.0, 0, 0, 0, 0, 0);
// pick out only the matches that are best
if (repeat > 0) {
int reducedCount = -1;
// copy over only the best values
for (int iter = 0; iter < count; iter++) {
if (reducedCount >= 0 && pos1Index[reducedCount] == pos1Index[iter]) {
// if better, record it
if (Math.abs(posShift[reducedCount] - medianShift)
> Math.abs(posShift[iter] - medianShift)) {
pos1Index[reducedCount] = pos1Index[iter];
pos2Index[reducedCount] = pos2Index[iter];
posShift[reducedCount] = posShift[iter];
}
} else {
// add the new data
reducedCount++;
pos1Index[reducedCount] = pos1Index[iter];
pos2Index[reducedCount] = pos2Index[iter];
posShift[reducedCount] = posShift[iter];
}
}
count = reducedCount + 1;
}
if (count <= 0) medianShift = 0;
else medianShift = Utils.quickSelect(Arrays.copyOf(posShift, count), count / 2, count);
// get the actual overlap size
int leftPosition = Math.max(0, -medianShift);
int rightPosition = Math.min(kmerSize1, kmerSize2 - medianShift);
overlapSize = Math.max(this.seqLength - kmerSize1, rightPosition - leftPosition);
// compute the max possible allowed shift in kmers
absMaxShiftInOverlap =
Math.min(Math.max(kmerSize1, kmerSize2), (int) ((double) overlapSize * maxShiftPercent));
// get the updated borders
valid1Lower = Math.max(0, -medianShift - absMaxShiftInOverlap);
valid1Upper = Math.min(kmerSize1, kmerSize2 - medianShift + absMaxShiftInOverlap);
valid2Lower = Math.max(0, medianShift - absMaxShiftInOverlap);
valid2Upper = Math.min(kmerSize2, kmerSize1 + medianShift + absMaxShiftInOverlap);
/*
System.err.println(overlapSize);
System.err.println("Size1= "+size1+" Lower:"+
valid1Lower+" Upper:"+valid1Upper+" Shift="+shift);
System.err.println("Size2= "+size2+" Lower:"+
valid2Lower+" Upper:"+valid2Upper);
*/
}
// storage for edge computation
int leftEdge1 = Integer.MAX_VALUE;
int leftEdge2 = Integer.MAX_VALUE;
int rightEdge1 = Integer.MIN_VALUE;
int rightEdge2 = Integer.MIN_VALUE;
// count only the shifts in the correct place
int validCount = 0;
for (int iter = 0; iter < count; iter++) {
int pos1 = pos1Index[iter];
int pos2 = pos2Index[iter];
// take only valid values
if (Math.abs(posShift[iter] - medianShift) > absMaxShiftInOverlap) continue;
// get the edges
if (pos1 < leftEdge1) leftEdge1 = pos1;
if (pos2 < leftEdge2) leftEdge2 = pos2;
if (pos1 > rightEdge1) rightEdge1 = pos1;
if (pos2 > rightEdge2) rightEdge2 = pos2;
validCount++;
}
if (validCount <= 1) return new OverlapInfo(0.0, 0, 0, 0, 0, 0);
// compute the score
double score = (double) validCount / (double) (overlapSize);
// get edge info uniformly minimum variance unbiased (UMVU) estimators
// a = (n*a-b)/(n-1)
// b = (n*b-a)/(n-1)
int a1 =
Math.max(
0, (int) Math.round((validCount * leftEdge1 - rightEdge1) / (double) (validCount - 1)));
int a2 =
Math.max(
0, (int) Math.round((validCount * leftEdge2 - rightEdge2) / (double) (validCount - 1)));
int b1 =
Math.min(
this.seqLength,
(int) Math.round((validCount * rightEdge1 - leftEdge1) / (double) (validCount - 1)));
int b2 =
Math.min(
s.seqLength,
(int) Math.round((validCount * rightEdge2 - leftEdge2) / (double) (validCount - 1)));
// int ahang = a1-a2;
// int bhang = (this.size()-b1>s.size()-b2) ? b1-this.size() : s.size() - b2;
// if (score>0.06)
// {
// int[] test = Arrays.copyOf(posShift, count);
// int[] test2 = Arrays.copyOf(pos1Index, count);
// System.err.println("Start = "+Math.max(0, -medianShift)+", Overlap="+overlapSize+"
// Maxshift="+absMaxShiftInOverlap+": ["+Arrays.toString(test)+";
// "+Arrays.toString(test2)+"];");
// System.err.println("Overlap="+overlapSize+",
// Shift/overlap="+(double)(test[test.length-10]-test[10])/(double)overlapSize);
// }
// the hangs are adjusted by the rate of slide*distance traveled relative to median,
// -medianShift-(a1-a2)
// return new OverlapInfo(score, ahang, bhang);
return new OverlapInfo(score * (double) REDUCTION, validCount, a1, a2, b1, b2);
}
