GenotypeQualityFilter.java

/*
 * The MIT License
 *
 * Copyright (c) 2014 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.vcf.filter;

import htsjdk.variant.variantcontext.Genotype;
import htsjdk.variant.variantcontext.VariantContext;

/**
 * Genotype filter that filters out genotypes below a given quality threshold.
 *
 * @author tfennell
 */
public class GenotypeQualityFilter implements GenotypeFilter {
    private final int minGq;

    public GenotypeQualityFilter(final int minGq) {
        this.minGq = minGq;
    }

    @Override
    public String filter(final VariantContext ctx, final Genotype gt) {
        if (gt.getGQ() < minGq) return "LowGQ";
        else return null;
    }
}