/*
* The MIT License
*
* Copyright (c) 2013 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.tribble.util;
import htsjdk.samtools.SAMSequenceDictionary;
import htsjdk.samtools.SAMSequenceRecord;
import htsjdk.samtools.util.BlockCompressedInputStream;
import htsjdk.tribble.TribbleException;
import htsjdk.tribble.readers.TabixReader;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
/**
* classes that have anything to do with tabix
*/
public class TabixUtils {
public static final String STANDARD_INDEX_EXTENSION = ".tbi";
public static class TPair64 implements Comparable<TPair64> {
public long u, v;
public TPair64(final long _u, final long _v) {
u = _u;
v = _v;
}
public TPair64(final TPair64 p) {
u = p.u;
v = p.v;
}
public int compareTo(final TPair64 p) {
return u == p.u ? 0 : ((u < p.u) ^ (u < 0) ^ (p.u < 0)) ? -1 : 1; // unsigned 64-bit comparison
}
}
public static class TIndex {
public HashMap<Integer, TPair64[]> b; // binning index
public long[] l; // linear index
}
public static class TIntv {
public int tid, beg, end;
}
public static boolean less64(final long u, final long v) { // unsigned 64-bit comparison
return (u < v) ^ (u < 0) ^ (v < 0);
}
/**
* Generates the SAMSequenceDictionary from the given tabix index file
*
* @param tabixIndex the tabix index file
* @return non-null sequence dictionary
*/
public static SAMSequenceDictionary getSequenceDictionary(final File tabixIndex) {
if (tabixIndex == null) throw new IllegalArgumentException();
try {
final BlockCompressedInputStream is = new BlockCompressedInputStream(tabixIndex);
// read preliminary bytes
byte[] buf = new byte[32];
is.read(buf, 0, 32);
// read sequence dictionary
int i, j, len = TabixReader.readInt(is);
buf = new byte[len];
is.read(buf);
final List<SAMSequenceRecord> sequences = new ArrayList<SAMSequenceRecord>();
for (i = j = 0; i < buf.length; ++i) {
if (buf[i] == 0) {
byte[] b = new byte[i - j];
System.arraycopy(buf, j, b, 0, b.length);
sequences.add(new SAMSequenceRecord(new String(b)));
j = i + 1;
}
}
is.close();
return new SAMSequenceDictionary(sequences);
} catch (Exception e) {
throw new TribbleException("Unable to read tabix index: " + e.getMessage());
}
}
}