01: /*
02: * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved.
03: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04: *
05: * This code is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU General Public License version 2 only, as
07: * published by the Free Software Foundation. Sun designates this
08: * particular file as subject to the "Classpath" exception as provided
09: * by Sun in the LICENSE file that accompanied this code.
10: *
11: * This code is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14: * version 2 for more details (a copy is included in the LICENSE file that
15: * accompanied this code).
16: *
17: * You should have received a copy of the GNU General Public License version
18: * 2 along with this work; if not, write to the Free Software Foundation,
19: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20: *
21: * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22: * CA 95054 USA or visit www.sun.com if you need additional information or
23: * have any questions.
24: */
25:
26: package sun.reflect;
27:
28: import java.lang.reflect.*;
29:
30: /** Used only for the first few invocations of a Method; afterward,
31: switches to bytecode-based implementation */
32:
33: class NativeMethodAccessorImpl extends MethodAccessorImpl {
34: private Method method;
35: private DelegatingMethodAccessorImpl parent;
36: private int numInvocations;
37:
38: NativeMethodAccessorImpl(Method method) {
39: this .method = method;
40: }
41:
42: public Object invoke(Object obj, Object[] args)
43: throws IllegalArgumentException, InvocationTargetException {
44: if (++numInvocations > ReflectionFactory.inflationThreshold()) {
45: MethodAccessorImpl acc = (MethodAccessorImpl) new MethodAccessorGenerator()
46: .generateMethod(method.getDeclaringClass(), method
47: .getName(), method.getParameterTypes(),
48: method.getReturnType(), method
49: .getExceptionTypes(), method
50: .getModifiers());
51: parent.setDelegate(acc);
52: }
53:
54: return invoke0(method, obj, args);
55: }
56:
57: void setParent(DelegatingMethodAccessorImpl parent) {
58: this .parent = parent;
59: }
60:
61: private static native Object invoke0(Method m, Object obj,
62: Object[] args);
63: }
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