libjava/classpath/tools/gnu/classpath/tools/gjdoc/expr/ConstantNull.java

   1 /* gnu.classpath.tools.gjdoc.expr.ConstantNull
   2    Copyright (C) 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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA. */
  20
  21 package gnu.classpath.tools.gjdoc.expr;
  22
  23 class ConstantNull
  24    extends ConstantExpression
  25 {
  26    public ConstantNull()
  27    {
  28    }
  29
  30    public Type getType()
  31    {
  32       return Type.NULL;
  33    }
  34
  35    public Number asNumber()
  36    {
  37       return null;
  38    }
  39
  40    public boolean isNumber()
  41    {
  42       return false;
  43    }
  44
  45    public Object asObject()
  46    {
  47       return null;
  48    }
  49 }