/*
 * Copyright (c) 2007-2013 The Broad Institute, Inc.
 * SOFTWARE COPYRIGHT NOTICE
 * This software and its documentation are the copyright of the Broad Institute, Inc. All rights are reserved.
 *
 * This software is supplied without any warranty or guaranteed support whatsoever. The Broad Institute is not responsible for its use, misuse, or functionality.
 *
 * This software is licensed under the terms of the GNU Lesser General Public License (LGPL),
 * Version 2.1 which is available at http://www.opensource.org/licenses/lgpl-2.1.php.
 */

package org.broad.igv.sam.reader;

import picard.sam.BuildBamIndex;
import htsjdk.samtools.SAMFileReader;
import org.broad.igv.ui.util.IndexCreatorDialog;

import javax.swing.*;
import java.io.File;

/**
 * Created by IntelliJ IDEA.
 * @author jrobinso
 * @since: Dec 6, 2009
 */
public class SamIndexer extends AlignmentIndexer {

    final static int FLAG_COL = 1;
    final static int READ_UNMAPPED_FLAG = 0x4;

    public SamIndexer(File samFile, JProgressBar progressBar, IndexCreatorDialog.SamIndexWorker worker) {
        super(samFile, progressBar, worker);
    }

    int getAlignmentStart(String[] fields) throws NumberFormatException {
        // Get alignmetn start and verify file is sorted.
        int alignmentStart = Integer.parseInt(fields[3].trim()) - 1;
        return alignmentStart;
    }

    int getAlignmentLength(String[] fields) throws NumberFormatException {
        String cigarString = fields[5];
        return SamUtils.getPaddedReferenceLength(cigarString);
    }

    String getChromosome(String[] fields) {
        return fields[2];
    }

    @Override
    boolean isMapped(String[] fields) {
        int flags = Integer.parseInt(fields[FLAG_COL]);
        return (flags & READ_UNMAPPED_FLAG) == 0;
    }

}
