1 /* 2 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * 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 final 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 { 45 if (++numInvocations > ReflectionFactory.inflationThreshold()) { 46 MethodAccessorImpl acc = (MethodAccessorImpl) 47 new MethodAccessorGenerator(). 48 generateMethod(method.getDeclaringClass(), 49 method.getName(), 50 method.getParameterTypes(), 51 method.getReturnType(), 52 method.getExceptionTypes(), 53 method.getModifiers()); 54 parent.setDelegate(acc); 55 } 56 57 return invoke0(method, obj, args); 58 } 59 60 void setParent(DelegatingMethodAccessorImpl parent) { 61 this.parent = parent; 62 } 63 64 private static native Object invoke0(Method m, Object obj, Object[] args); 65 }