1 /*******************************************************************************
2 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
3 * Copyright (C) $(date) The Jalview Authors
5 * This file is part of Jalview.
7 * Jalview is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation, either version 3
10 * of the License, or (at your option) any later version.
12 * Jalview is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR
15 * PURPOSE. See the GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Jalview. If not, see <http://www.gnu.org/licenses/>.
19 * The Jalview Authors are detailed in the 'AUTHORS' file.
20 *******************************************************************************/
22 // This software is now distributed according to
23 // the Lesser Gnu Public License. Please see
24 // http://www.gnu.org/copyleft/lesser.txt for
26 // -- Happy Computing!
28 package com.stevesoft.pat;
30 import java.util.Hashtable;
32 /** Implements "(?= )" and "(?! )" */
33 class lookAhead extends Or
42 public Pattern getNext()
47 public int nextMatch(int pos, Pthings pt)
49 Pattern p = super.getNext();
52 return p.matchInternal(pos, pt);
60 public int matchInternal(int pos, Pthings pt)
62 if (super.matchInternal(pos, pt) >= 0)
70 return nextMatch(pos, pt);
77 return nextMatch(pos, pt);
98 public patInt minChars()
100 return new patInt(0);
103 public patInt maxChars()
105 return new patInt(0);
108 Pattern clone1(Hashtable h)
110 lookAhead la = new lookAhead(reverse);
113 for (int i = 0; i < v.size(); i++)
115 la.v.addElement(((Pattern) v.elementAt(i)).clone(h));