01: /*
02: * FindBugs - Find Bugs in Java programs
03: * Copyright (C) 2003-2007 University of Maryland
04: *
05: * This library is free software; you can redistribute it and/or
06: * modify it under the terms of the GNU Lesser General Public
07: * License as published by the Free Software Foundation; either
08: * version 2.1 of the License, or (at your option) any later version.
09: *
10: * This library is distributed in the hope that it will be useful,
11: * but WITHOUT ANY WARRANTY; without even the implied warranty of
12: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13: * Lesser General Public License for more details.
14: *
15: * You should have received a copy of the GNU Lesser General Public
16: * License along with this library; if not, write to the Free Software
17: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18: */
19:
20: package edu.umd.cs.findbugs.ba;
21:
22: import org.apache.bcel.generic.InstructionHandle;
23: import org.apache.bcel.generic.MethodGen;
24:
25: /**
26: * Map BCEL InstructionHandles to some kind of value type.
27: *
28: * @author David Hovemeyer
29: */
30: public class InstructionHandleMap<ValueType> {
31: private Object[] map;
32:
33: public InstructionHandleMap(MethodGen methodGen) {
34: map = new Object[methodGen.getMethod().getCode().getLength()];
35: }
36:
37: public ValueType get(InstructionHandle handle) {
38: return (ValueType) map[handle.getPosition()];
39: }
40:
41: public ValueType put(InstructionHandle handle, ValueType value) {
42: ValueType old = get(handle);
43: map[handle.getPosition()] = value;
44: return old;
45: }
46: }
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