| /* gnu.classpath.tools.gjdoc.expr.BinaryShiftExpression |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| package gnu.classpath.tools.gjdoc.expr; |
| |
| abstract class BinaryShiftExpression |
| extends BinaryExpression |
| { |
| protected BinaryShiftExpression(Expression left, Expression right) |
| { |
| super(left, right); |
| } |
| |
| public ConstantExpression evaluate(Context context) |
| throws IllegalExpressionException |
| { |
| ConstantExpression leftValue = left.evaluate(context); |
| ConstantExpression rightValue = right.evaluate(context); |
| |
| if (Type.LONG == leftValue.getType()) { |
| return new ConstantLong(compute(leftValue.asNumber().longValue(), |
| rightValue.asNumber().intValue())); |
| } |
| else { |
| return new ConstantInteger(compute(leftValue.asNumber().intValue(), |
| rightValue.asNumber().intValue())); |
| } |
| } |
| |
| protected abstract long compute(long leftValue, int rightValue); |
| protected abstract int compute(int leftValue, int rightValue); |
| } |