/*
* The MIT License
*
* Copyright (c) 2009 The Broad Institute
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package htsjdk.samtools;
import htsjdk.samtools.util.SequenceUtil;
import htsjdk.samtools.util.StringUtil;
/**
* @author alecw@broadinstitute.org
*/
public class SAMRecordUtil {
/** List of String tags that must be reversed if present when a SAMRecord is reverseComplemented */
private static final short[] STRING_TAGS_TO_REVERSE = {
SAMTagUtil.getSingleton().U2,
SAMTagUtil.getSingleton().OQ
};
/**
* Reverse-complement all known sequence and base quality attributes of the SAMRecord.
*/
public static void reverseComplement(final SAMRecord rec) {
final byte[] readBases = rec.getReadBases();
SequenceUtil.reverseComplement(readBases);
rec.setReadBases(readBases);
final byte qualities[] = rec.getBaseQualities();
reverseArray(qualities);
rec.setBaseQualities(qualities);
final byte[] sqTagValue = (byte[])rec.getAttribute(SAMTagUtil.getSingleton().SQ);
if (sqTagValue != null) {
SQTagUtil.reverseComplementSqArray(sqTagValue);
rec.setAttribute(SAMTagUtil.getSingleton().SQ, sqTagValue);
}
final String e2TagValue = (String)rec.getAttribute(SAMTagUtil.getSingleton().E2);
if (e2TagValue != null) {
final byte[] secondaryBases = StringUtil.stringToBytes(e2TagValue);
SequenceUtil.reverseComplement(secondaryBases);
rec.setAttribute(SAMTagUtil.getSingleton().E2, StringUtil.bytesToString(secondaryBases));
}
for (final short stringTag : STRING_TAGS_TO_REVERSE) {
final String value = (String)rec.getAttribute(stringTag);
if (value != null) {
rec.setAttribute(stringTag, StringUtil.reverseString(value));
}
}
}
/**
* Reverse the given array in place.
*/
public static void reverseArray(final byte[] array) {
final int lastIndex = array.length - 1;
int i, j;
for (i=0, j=lastIndex; i<j; ++i, --j) {
final byte tmp = array[i];
array[i] = array[j];
array[j] = tmp;
}
}
}