source: branches/ralph/src/main/java/de/ugoe/cs/autoquest/tasktrees/alignment/matrix/PairwiseAlignmentGenerator.java @ 1617

package de.ugoe.cs.autoquest.tasktrees.alignment.matrix;

import java.util.ArrayList;
import java.util.Iterator;

import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.AlignmentAlgorithm;
import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.AlignmentAlgorithmFactory;
import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.NumberSequence;

public class PairwiseAlignmentGenerator {

        public static PairwiseAlignmentStorage generate(
                        ArrayList<NumberSequence> numberseqs,
                        ObjectDistanceSubstitionMatrix submat) {
                PairwiseAlignmentStorage alignments = new PairwiseAlignmentStorage(
                                numberseqs.size(), numberseqs.size());

                for (int i = 0; i < numberseqs.size(); i++) {
                        NumberSequence ns1 = numberseqs.get(i);
                        for (int j = 0; j < numberseqs.size(); j++) {
                                NumberSequence ns2 = numberseqs.get(j);

                                if (i != j) {
                                        int smithWatermanThreshold = 10;
                                        AlignmentAlgorithm aa = AlignmentAlgorithmFactory.create();
                                        aa.align(ns1.getSequence(), ns2.getSequence(), submat,
                                                        smithWatermanThreshold);
                                        alignments.set(i, j, aa);

                                        AlignmentAlgorithm sameSequence1 = AlignmentAlgorithmFactory
                                                        .create();
                                        sameSequence1.align(ns1.getSequence(), ns1.getSequence(),
                                                        submat, smithWatermanThreshold);
                                        AlignmentAlgorithm sameSequence2 = AlignmentAlgorithmFactory
                                                        .create();
                                        sameSequence2.align(ns2.getSequence(), ns2.getSequence(),
                                                        submat, smithWatermanThreshold);
                                        AlignmentAlgorithm randomSequence = AlignmentAlgorithmFactory
                                                        .create();
                                        randomSequence.align(ns1.shuffle().getSequence(), ns2
                                                        .shuffle().getSequence(), submat,
                                                        smithWatermanThreshold);

                                        // Score of the aligmnment
                                        double score = alignments.get(i, j).getAlignmentScore();

                                        
                                        // Scores of the sequence being aligned to itself (maximum
                                        // score)
                                        double sSelf1 = sameSequence1.getAlignmentScore();
                                        double sSelf2 = sameSequence2.getAlignmentScore();
                                        // Score of sequences shuffled before aligned
                                        double sRand = randomSequence.getAlignmentScore();

                                        double sMax = (sSelf1 + sSelf2) / 2;
                                        double sEff = (score - sRand) / (sMax - sRand);
                                        if (sEff < 0) {
                                                sEff = 0;
                                        }
                                        double distance = -Math.log(sEff);

                                        if (!Double.isInfinite(distance) && !Double.isNaN(distance)) {
                                                if (distance < alignments.getDistance(i, j)) {
                                                        alignments.setDistance(i, j, distance);
                                                }
                                        }
                                }
                        }
                }
                return alignments;
        }
}