+
+ /**
+ * Constructs a new RNA model from the given one, without gaps. Also
+ * calculates and saves a 'shift list'
+ *
+ * @param rna
+ * @param name
+ * @return
+ */
+ public RNA trimRNA(RNA rna, String name)
+ {
+ ShiftList offset = new ShiftList();
+
+ RNA rnaTrim = new RNA(name);
+ try
+ {
+ String structDBN = rna.getStructDBN(true);
+ rnaTrim.setRNA(rna.getSeq(), replaceOddGaps(structDBN));
+ } catch (ExceptionUnmatchedClosingParentheses e2)
+ {
+ e2.printStackTrace();
+ } catch (ExceptionFileFormatOrSyntax e3)
+ {
+ e3.printStackTrace();
+ }
+
+ String seq = rnaTrim.getSeq();
+ StringBuilder struc = new StringBuilder(256);
+ struc.append(rnaTrim.getStructDBN(true));
+ int ofstart = -1;
+ int sleng = seq.length();
+
+ for (int i = 0; i < sleng; i++)
+ {
+ if (Comparison.isGap(seq.charAt(i)))
+ {
+ if (ofstart == -1)
+ {
+ ofstart = i;
+ }
+ /*
+ * mark base or base & pair in the structure with *
+ */
+ if (!rnaTrim.findPair(i).isEmpty())
+ {
+ int m = rnaTrim.findPair(i).get(1);
+ int l = rnaTrim.findPair(i).get(0);
+
+ struc.replace(m, m + 1, "*");
+ struc.replace(l, l + 1, "*");
+ }
+ else
+ {
+ struc.replace(i, i + 1, "*");
+ }
+ }
+ else
+ {
+ if (ofstart > -1)
+ {
+ offset.addShift(offset.shift(ofstart), ofstart - i);
+ ofstart = -1;
+ }
+ }
+ }
+ // final gap
+ if (ofstart > -1)
+ {
+ offset.addShift(offset.shift(ofstart), ofstart - sleng);
+ ofstart = -1;
+ }
+
+ /*
+ * remove the marked gaps from the structure
+ */
+ String newStruc = struc.toString().replace("*", "");
+
+ /*
+ * remove gaps from the sequence
+ */
+ String newSeq = AlignSeq.extractGaps(Comparison.GapChars, seq);
+
+ try
+ {
+ rnaTrim.setRNA(newSeq, newStruc);
+ registerOffset(rnaTrim, offset);
+ } catch (ExceptionUnmatchedClosingParentheses e)
+ {
+ e.printStackTrace();
+ } catch (ExceptionFileFormatOrSyntax e)
+ {
+ e.printStackTrace();
+ }
+ return rnaTrim;
+ }
+
+ /**
+ * Save the sequence to structure mapping, and also its inverse.
+ *
+ * @param rnaTrim
+ * @param offset
+ */