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CollectRrbsMetrics.java
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CollectRrbsMetrics.java
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/*
* 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 picard.analysis;
import htsjdk.samtools.*;
import htsjdk.samtools.metrics.MetricsFile;
import htsjdk.samtools.reference.ReferenceSequence;
import htsjdk.samtools.reference.ReferenceSequenceFileWalker;
import htsjdk.samtools.util.CloserUtil;
import htsjdk.samtools.util.CollectionUtil;
import htsjdk.samtools.util.IOUtil;
import htsjdk.samtools.util.Log;
import htsjdk.samtools.util.ProgressLogger;
import org.broadinstitute.barclay.argparser.Argument;
import org.broadinstitute.barclay.argparser.CommandLineProgramProperties;
import org.broadinstitute.barclay.help.DocumentedFeature;
import picard.PicardException;
import picard.cmdline.CommandLineProgram;
import picard.cmdline.StandardOptionDefinitions;
import picard.cmdline.argumentcollections.ReferenceArgumentCollection;
import picard.cmdline.programgroups.DiagnosticsAndQCProgramGroup;
import picard.util.RExecutor;
import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Calculates and reports QC metrics for RRBS data based on the methylation status at individual C/G bases as well
* as CpG sites across all reads in the input BAM/SAM file.
*
* @author jgentry@broadinstitute.org
*/
@CommandLineProgramProperties(
summary = CollectRrbsMetrics.USAGE_SUMMARY + CollectRrbsMetrics.USAGE_DETAILS,
oneLineSummary = CollectRrbsMetrics.USAGE_SUMMARY,
programGroup = DiagnosticsAndQCProgramGroup.class
)
@DocumentedFeature
public class CollectRrbsMetrics extends CommandLineProgram {
static final String USAGE_SUMMARY = "<b>Collects metrics from reduced representation bisulfite sequencing (Rrbs) data.</b> ";
static final String USAGE_DETAILS = "<p>This tool uses reduced representation bisulfite sequencing (Rrbs) data to determine cytosine " +
"methylation status across all reads of a genomic DNA sequence. For a primer on bisulfite sequencing and cytosine methylation, " +
"please see the corresponding <a href='https://www.broadinstitute.org/gatk/guide/article?id=6330'>GATK Dictionary entry</a>. </p>" +
"<p>Briefly, bisulfite reduction converts un-methylated cytosine (C) to uracil (U) bases. Methylated sites are not converted " +
"because they are resistant to bisulfite reduction. Subsequent to PCR amplification of the reaction products, bisulfite " +
"reduction manifests as [C -> T (+ strand) or G -> A (- strand)] base conversions. Thus, conversion rates" +
" can be calculated from the reads as follows: [CR = converted/(converted + unconverted)]. Since methylated cytosines are " +
"protected against Rrbs-mediated conversion, the methylation rate (MR) is as follows:" +
"[MR = unconverted/(converted + unconverted) = (1 - CR)].</p>" +
"<p>The CpG CollectRrbsMetrics tool outputs three files including summary and detail metrics tables as well as a PDF file containing " +
"four graphs. These graphs are derived from the summary table and include a comparison of conversion rates for both CpG and non-CpG sites, " +
"the distribution of total numbers of CpG sites as a function of the CpG conversion rates, the distribution of CpG sites by the level of " +
"read coverage (depth), and the numbers of reads discarded resulting from either exceeding the mismatch rate or size (too short). " +
"The detailed metrics table includes the coordinates of all of the CpG sites for the experiment as well as the conversion rates " +
"observed for each site.</p>" +
"<h4>Usage example:</h4>" +
"<pre>" +
"java -jar picard.jar CollectRrbsMetrics \\<br />" +
" R=reference_sequence.fasta \\<br />" +
" I=input.bam \\<br />" +
" M=basename_for_metrics_files" +
"</pre>" +
"<p>Please see the CollectRrbsMetrics " +
"<a href='https://broadinstitute.github.io/picard/picard-metric-definitions.html#RrbsCpgDetailMetrics'>definitions</a>" +
" for a complete description of both the detail and summary metrics produced by this tool.</p>" +
"<hr />";
// Path to R file for plotting purposes
private static final String R_SCRIPT = "picard/analysis/rrbsQc.R";
@Argument(doc = "The BAM or SAM file containing aligned reads. Must be coordinate sorted", shortName = StandardOptionDefinitions.INPUT_SHORT_NAME)
public File INPUT;
@Argument(doc = "Base name for output files", shortName = StandardOptionDefinitions.METRICS_FILE_SHORT_NAME)
public String METRICS_FILE_PREFIX;
@Argument(doc = "Minimum read length")
public int MINIMUM_READ_LENGTH = 5;
@Argument(doc = "Threshold for base quality of a C base before it is considered")
public int C_QUALITY_THRESHOLD = 20;
@Argument(doc = "Threshold for quality of a base next to a C before the C base is considered")
public int NEXT_BASE_QUALITY_THRESHOLD = 10;
@Argument(doc = "Maximum percentage of mismatches in a read for it to be considered, with a range of 0-1")
public double MAX_MISMATCH_RATE = 0.1;
@Argument(doc = "Set of sequence names to consider, if not specified all sequences will be used", optional = true)
public Set<String> SEQUENCE_NAMES = new HashSet<String>();
@Argument(shortName = StandardOptionDefinitions.ASSUME_SORTED_SHORT_NAME,
doc = "If true, assume that the input file is coordinate sorted even if the header says otherwise.")
public boolean ASSUME_SORTED = false;
@Argument(shortName = "LEVEL", doc = "The level(s) at which to accumulate metrics. ")
public Set<MetricAccumulationLevel> METRIC_ACCUMULATION_LEVEL = CollectionUtil.makeSet(MetricAccumulationLevel.ALL_READS);
public static final String DETAIL_FILE_EXTENSION = "rrbs_detail_metrics";
public static final String SUMMARY_FILE_EXTENSION = "rrbs_summary_metrics";
public static final String PDF_FILE_EXTENSION = "rrbs_qc.pdf";
private static final Log log = Log.getInstance(CollectRrbsMetrics.class);
// return a custom argument collection since this tool uses a (required) argument name
// of "REFERENCE", not "REFERENCE_SEQUENCE"
@Override
protected ReferenceArgumentCollection makeReferenceArgumentCollection() {
return new CollectRrbsMetricsReferenceArgumentCollection();
}
public static class CollectRrbsMetricsReferenceArgumentCollection implements ReferenceArgumentCollection {
@Argument(doc = "The reference sequence fasta file", shortName = StandardOptionDefinitions.REFERENCE_SHORT_NAME)
public File REFERENCE;
@Override
public File getReferenceFile() {
return REFERENCE;
};
}
@Override
protected int doWork() {
if (!METRICS_FILE_PREFIX.endsWith(".")) {
METRICS_FILE_PREFIX = METRICS_FILE_PREFIX + ".";
}
final File SUMMARY_OUT = new File(METRICS_FILE_PREFIX + SUMMARY_FILE_EXTENSION);
final File DETAILS_OUT = new File(METRICS_FILE_PREFIX + DETAIL_FILE_EXTENSION);
final File PLOTS_OUT = new File(METRICS_FILE_PREFIX + PDF_FILE_EXTENSION);
assertIoFiles(SUMMARY_OUT, DETAILS_OUT, PLOTS_OUT);
final SamReader samReader = SamReaderFactory.makeDefault().open(INPUT);
if (!ASSUME_SORTED && samReader.getFileHeader().getSortOrder() != SAMFileHeader.SortOrder.coordinate) {
throw new PicardException("The input file " + INPUT.getAbsolutePath() + " does not appear to be coordinate sorted");
}
final ReferenceSequenceFileWalker refWalker = new ReferenceSequenceFileWalker(REFERENCE_SEQUENCE);
final ProgressLogger progressLogger = new ProgressLogger(log);
final RrbsMetricsCollector metricsCollector = new RrbsMetricsCollector(METRIC_ACCUMULATION_LEVEL, samReader.getFileHeader().getReadGroups(),
C_QUALITY_THRESHOLD, NEXT_BASE_QUALITY_THRESHOLD, MINIMUM_READ_LENGTH, MAX_MISMATCH_RATE);
for (final SAMRecord samRecord : samReader) {
progressLogger.record(samRecord);
if (!samRecord.getReadUnmappedFlag() && !isSequenceFiltered(samRecord.getReferenceName())) {
final ReferenceSequence referenceSequence = refWalker.get(samRecord.getReferenceIndex());
metricsCollector.acceptRecord(samRecord, referenceSequence);
}
}
metricsCollector.finish();
final MetricsFile<RrbsMetrics, Comparable<?>> rrbsMetrics = getMetricsFile();
metricsCollector.addAllLevelsToFile(rrbsMetrics);
// Using RrbsMetrics as a way to get both of the metrics objects through the MultiLevelCollector. Once
// we get it out split it apart to the two separate MetricsFiles and write them to file
final MetricsFile<RrbsSummaryMetrics, ?> summaryFile = getMetricsFile();
final MetricsFile<RrbsCpgDetailMetrics, ?> detailsFile = getMetricsFile();
for (final RrbsMetrics rrbsMetric : rrbsMetrics.getMetrics()) {
summaryFile.addMetric(rrbsMetric.getSummaryMetrics());
for (final RrbsCpgDetailMetrics detailMetric : rrbsMetric.getDetailMetrics()) {
detailsFile.addMetric(detailMetric);
}
}
summaryFile.write(SUMMARY_OUT);
detailsFile.write(DETAILS_OUT);
RExecutor.executeFromClasspath(R_SCRIPT, DETAILS_OUT.getAbsolutePath(), SUMMARY_OUT.getAbsolutePath(), PLOTS_OUT.getAbsolutePath().replaceAll("%", "%%"));
CloserUtil.close(samReader);
return 0;
}
private boolean isSequenceFiltered(final String sequenceName) {
return (SEQUENCE_NAMES != null) && (!SEQUENCE_NAMES.isEmpty()) && (!SEQUENCE_NAMES.contains(sequenceName));
}
private void assertIoFiles(final File summaryFile, final File detailsFile, final File plotsFile) {
IOUtil.assertFileIsReadable(INPUT);
IOUtil.assertFileIsReadable(REFERENCE_SEQUENCE);
IOUtil.assertFileIsWritable(summaryFile);
IOUtil.assertFileIsWritable(detailsFile);
IOUtil.assertFileIsWritable(plotsFile);
}
@Override
protected String[] customCommandLineValidation() {
final List<String> errorMsgs = new ArrayList<String>();
if (MAX_MISMATCH_RATE < 0 || MAX_MISMATCH_RATE > 1) {
errorMsgs.add("MAX_MISMATCH_RATE must be in the range of 0-1");
}
if (C_QUALITY_THRESHOLD < 0) {
errorMsgs.add("C_QUALITY_THRESHOLD must be >= 0");
}
if (NEXT_BASE_QUALITY_THRESHOLD < 0) {
errorMsgs.add("NEXT_BASE_QUALITY_THRESHOLD must be >= 0");
}
if (MINIMUM_READ_LENGTH <= 0) {
errorMsgs.add("MINIMUM_READ_LENGTH must be > 0");
}
if (!checkRInstallation(R_SCRIPT != null)) {
errorMsgs.add("R is not installed on this machine. It is required for creating the chart.");
}
return errorMsgs.isEmpty() ? null : errorMsgs.toArray(new String[errorMsgs.size()]);
}
}