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 /** This class implements the word boundary pattern element: \b. */
33 class Boundary extends Pattern
35 public String toString()
37 return "\\b" + nextString();
40 boolean isAChar(char c)
42 if (c >= 'a' && c <= 'z')
46 if (c >= 'A' && c <= 'Z')
50 if (c >= '0' && c <= '9')
61 boolean matchLeft(int pos, Pthings pt)
67 if (isAChar(pt.src.charAt(pos)) && isAChar(pt.src.charAt(pos - 1)))
74 boolean matchRight(int pos, Pthings pt)
80 if (pos + 1 >= pt.src.length())
84 if (isAChar(pt.src.charAt(pos)) && isAChar(pt.src.charAt(pos + 1)))
91 public int matchInternal(int pos, Pthings pt)
93 if (matchRight(pos - 1, pt) || matchLeft(pos, pt))
95 return nextMatch(pos, pt);
100 public patInt maxChars()
102 return new patInt(0);
105 public Pattern clone1(Hashtable h)
107 return new Boundary();