jdk/src/share/classes/sun/reflect/NativeConstructorAccessorImpl.java
author duke
Sat, 01 Dec 2007 00:00:00 +0000
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/*
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 * Copyright 2001 Sun Microsystems, Inc.  All Rights Reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Sun designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Sun in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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 * CA 95054 USA or visit www.sun.com if you need additional information or
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 * have any questions.
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 */
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package sun.reflect;
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import java.lang.reflect.*;
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/** Used only for the first few invocations of a Constructor;
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    afterward, switches to bytecode-based implementation */
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class NativeConstructorAccessorImpl extends ConstructorAccessorImpl {
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    private Constructor c;
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    private DelegatingConstructorAccessorImpl parent;
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    private int numInvocations;
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    NativeConstructorAccessorImpl(Constructor c) {
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        this.c = c;
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    }
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    public Object newInstance(Object[] args)
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        throws InstantiationException,
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               IllegalArgumentException,
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               InvocationTargetException
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    {
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        if (++numInvocations > ReflectionFactory.inflationThreshold()) {
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            ConstructorAccessorImpl acc = (ConstructorAccessorImpl)
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                new MethodAccessorGenerator().
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                    generateConstructor(c.getDeclaringClass(),
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                                        c.getParameterTypes(),
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                                        c.getExceptionTypes(),
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                                        c.getModifiers());
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            parent.setDelegate(acc);
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        }
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        return newInstance0(c, args);
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    }
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    void setParent(DelegatingConstructorAccessorImpl parent) {
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        this.parent = parent;
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    }
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    private static native Object newInstance0(Constructor c, Object[] args)
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        throws InstantiationException,
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               IllegalArgumentException,
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               InvocationTargetException;
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}