Added getDescription() in VCFFilterHeaderLine

src/main/java/htsjdk/variant/vcf/VCFFilterHeaderLine.java

@@ -33,22 +33,24 @@
  * A class representing a key=value entry for FILTER fields in the VCF header
  */
 public class VCFFilterHeaderLine extends VCFSimpleHeaderLine  {
+    
+    private static final long serialVersionUID = 1L;
 
     /**
      * create a VCF filter header line
      *
      * @param name         the name for this header line
      * @param description  the description for this header line
      */
-    public VCFFilterHeaderLine(String name, String description) {
+    public VCFFilterHeaderLine(final String name, final String description) {
         super("FILTER", name, description);
     }
 
     /**
      * Convenience constructor for FILTER whose description is the name
      * @param name
      */
-    public VCFFilterHeaderLine(String name) {
+    public VCFFilterHeaderLine(final String name) {
         super("FILTER", name, name);
     }
 
@@ -58,12 +60,20 @@ public VCFFilterHeaderLine(String name) {
      * @param line      the header line
      * @param version   the vcf header version
      */
-    public VCFFilterHeaderLine(String line, VCFHeaderVersion version) {
+    public VCFFilterHeaderLine(final String line, final VCFHeaderVersion version) {
         super(line, version, "FILTER", Arrays.asList("ID", "Description"));
     }
 
     @Override
     public boolean shouldBeAddedToDictionary() {
         return true;
     }
-}
+    
+    /**
+     * get the "Description" field
+     * @return the "Description" field
+     */
+    public String getDescription() {
+        return getGenericFieldValue("Description");
+    }
+}

src/test/java/htsjdk/variant/vcf/VCFHeaderUnitTest.java

@@ -196,7 +196,9 @@ public void testVCFHeaderAddFormatLine() {
     @Test
     public void testVCFHeaderAddFilterLine() {
         final VCFHeader header = getHiSeqVCFHeader();
-        final VCFFilterHeaderLine filterLine = new VCFFilterHeaderLine("TestFilterLine");
+        final String filterDesc = "TestFilterLine Description";
+        final VCFFilterHeaderLine filterLine = new VCFFilterHeaderLine("TestFilterLine",filterDesc);
+        Assert.assertEquals(filterDesc,filterLine.getDescription());
         header.addMetaDataLine(filterLine);
 
         Assert.assertTrue(header.getFilterLines().contains(filterLine), "TestFilterLine not found in filter header lines");