+ * register sequence groups on the alignment for **output**
+ *
+ * @param al
+ */
+ public void addSeqGroups(AlignmentI al)
+ {
+ this.seqGroups = al.getGroups();
+
+ }
+
+ /**
+ * Add any additional information extracted from the file to the alignment
+ * properties.
+ *
+ * @note implicitly called by addAnnotations()
+ * @param al
+ */
+ public void addProperties(AlignmentI al)
+ {
+ if (properties != null && properties.size() > 0)
+ {
+ Enumeration keys = properties.keys();
+ Enumeration vals = properties.elements();
+ while (keys.hasMoreElements())
+ {
+ al.setProperty(keys.nextElement(), vals.nextElement());
+ }
+ }
+ }
+
+ /**
+ * Store a non-null key-value pair in a hashtable used to set alignment
+ * properties note: null keys will raise an error, null values will result in
+ * the key/value pair being silently ignored.
+ *
+ * @param key
+ * - non-null key object
+ * @param value
+ * - non-null value
+ */
+ protected void setAlignmentProperty(Object key, Object value)
+ {
+ if (key == null)
+ {
+ throw new Error(MessageManager.getString("error.implementation_error_cannot_have_null_alignment"));
+ }
+ if (value == null)
+ {
+ return; // null properties are ignored.
+ }
+ if (properties == null)
+ {
+ properties = new Hashtable();
+ }
+ properties.put(key, value);
+ }
+
+ protected Object getAlignmentProperty(Object key)
+ {
+ if (properties != null && key != null)
+ {
+ return properties.get(key);
+ }
+ return null;
+ }
+
+ /**