Source for gnu.java.util.regex.UncheckedRE

   1: /* gnu/regexp/UncheckedRE.java
   2:    Copyright (C) 2001, 2004 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.java.util.regex;
  39: 
  40: /**
  41:  * UncheckedRE is a subclass of RE that allows programmers an easier means
  42:  * of programmatically precompiling regular expressions.  It is constructed
  43:  * and used in exactly the same manner as an instance of the RE class; the
  44:  * only difference is that its constructors do not throw REException.
  45:  * Instead, if a syntax error is encountered during construction, a
  46:  * RuntimeException will be thrown.
  47:  * <P>
  48:  * Note that this makes UncheckedRE dangerous if constructed with
  49:  * dynamic data.  Do not use UncheckedRE unless you are completely sure
  50:  * that all input being passed to it contains valid, well-formed 
  51:  * regular expressions for the syntax specified.
  52:  *
  53:  * @author <A HREF="mailto:wes@cacas.org">Wes Biggs</A>
  54:  * @see gnu.java.util.regex.RE 
  55:  * @since gnu.regexp 1.1.4
  56:  */
  57: 
  58: public final class UncheckedRE extends RE {
  59:   /**
  60:    * Constructs a regular expression pattern buffer without any compilation
  61:    * flags set, and using the default syntax (RESyntax.RE_SYNTAX_PERL5).
  62:    *
  63:    * @param pattern A regular expression pattern, in the form of a String,
  64:    *   StringBuffer or char[].  Other input types will be converted to
  65:    *   strings using the toString() method.
  66:    * @exception RuntimeException The input pattern could not be parsed.
  67:    * @exception NullPointerException The pattern was null.
  68:    */
  69:   public UncheckedRE(Object pattern) {
  70:       this(pattern,0,RESyntax.RE_SYNTAX_PERL5);
  71:   }
  72: 
  73:   /**
  74:    * Constructs a regular expression pattern buffer using the specified
  75:    * compilation flags and the default syntax (RESyntax.RE_SYNTAX_PERL5).
  76:    *
  77:    * @param pattern A regular expression pattern, in the form of a String,
  78:    *   StringBuffer, or char[].  Other input types will be converted to
  79:    *   strings using the toString() method.
  80:    * @param cflags The logical OR of any combination of the compilation flags in the RE class.
  81:    * @exception RuntimeException The input pattern could not be parsed.
  82:    * @exception NullPointerException The pattern was null.
  83:    */
  84:   public UncheckedRE(Object pattern, int cflags) {
  85:       this(pattern,cflags,RESyntax.RE_SYNTAX_PERL5);
  86:   }
  87: 
  88:   /**
  89:    * Constructs a regular expression pattern buffer using the specified
  90:    * compilation flags and regular expression syntax.
  91:    *
  92:    * @param pattern A regular expression pattern, in the form of a String,
  93:    *   StringBuffer, or char[].  Other input types will be converted to
  94:    *   strings using the toString() method.
  95:    * @param cflags The logical OR of any combination of the compilation flags in the RE class.
  96:    * @param syntax The type of regular expression syntax to use.
  97:    * @exception RuntimeException The input pattern could not be parsed.
  98:    * @exception NullPointerException The pattern was null.
  99:    */
 100:   public UncheckedRE(Object pattern, int cflags, RESyntax syntax) {
 101:       try {
 102:       initialize(pattern,cflags,syntax,0,0);
 103:       } catch (REException e) { 
 104:       throw new RuntimeException(e.getMessage());
 105:       }
 106:   }
 107: }
 108: