jdk/src/java.base/share/classes/sun/reflect/NativeConstructorAccessorImpl.java
changeset 37377 bd3b98a11a14
parent 37376 5daa5fbad3ce
parent 37374 ee1b8619eddb
child 37380 55c2549714af
equal deleted inserted replaced
37376:5daa5fbad3ce 37377:bd3b98a11a14
     1 /*
       
     2  * Copyright (c) 2001, 2013, 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 import sun.reflect.misc.ReflectUtil;
       
    30 
       
    31 /** Used only for the first few invocations of a Constructor;
       
    32     afterward, switches to bytecode-based implementation */
       
    33 
       
    34 class NativeConstructorAccessorImpl extends ConstructorAccessorImpl {
       
    35     private final Constructor<?> c;
       
    36     private DelegatingConstructorAccessorImpl parent;
       
    37     private int numInvocations;
       
    38 
       
    39     NativeConstructorAccessorImpl(Constructor<?> c) {
       
    40         this.c = c;
       
    41     }
       
    42 
       
    43     public Object newInstance(Object[] args)
       
    44         throws InstantiationException,
       
    45                IllegalArgumentException,
       
    46                InvocationTargetException
       
    47     {
       
    48         // We can't inflate a constructor belonging to a vm-anonymous class
       
    49         // because that kind of class can't be referred to by name, hence can't
       
    50         // be found from the generated bytecode.
       
    51         if (++numInvocations > ReflectionFactory.inflationThreshold()
       
    52                 && !ReflectUtil.isVMAnonymousClass(c.getDeclaringClass())) {
       
    53             ConstructorAccessorImpl acc = (ConstructorAccessorImpl)
       
    54                 new MethodAccessorGenerator().
       
    55                     generateConstructor(c.getDeclaringClass(),
       
    56                                         c.getParameterTypes(),
       
    57                                         c.getExceptionTypes(),
       
    58                                         c.getModifiers());
       
    59             parent.setDelegate(acc);
       
    60         }
       
    61 
       
    62         return newInstance0(c, args);
       
    63     }
       
    64 
       
    65     void setParent(DelegatingConstructorAccessorImpl parent) {
       
    66         this.parent = parent;
       
    67     }
       
    68 
       
    69     private static native Object newInstance0(Constructor<?> c, Object[] args)
       
    70         throws InstantiationException,
       
    71                IllegalArgumentException,
       
    72                InvocationTargetException;
       
    73 }