src/share/classes/sun/reflect/NativeConstructorAccessorImpl.java

/*
 * Copyright (c) 2001, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.reflect;

import java.lang.reflect.*;

/** Used only for the first few invocations of a Constructor;
    afterward, switches to bytecode-based implementation */

class NativeConstructorAccessorImpl extends ConstructorAccessorImpl {
    private Constructor c;
    private DelegatingConstructorAccessorImpl parent;
    private int numInvocations;

    NativeConstructorAccessorImpl(Constructor c) {
        this.c = c;
    }

    public Object newInstance(Object[] args)
        throws InstantiationException,
               IllegalArgumentException,
               InvocationTargetException
    {
        if (++numInvocations > ReflectionFactory.inflationThreshold()) {
            ConstructorAccessorImpl acc = (ConstructorAccessorImpl)
                new MethodAccessorGenerator().
                    generateConstructor(c.getDeclaringClass(),
                                        c.getParameterTypes(),
                                        c.getExceptionTypes(),
                                        c.getModifiers());
            parent.setDelegate(acc);
        }

        return newInstance0(c, args);
    }

    void setParent(DelegatingConstructorAccessorImpl parent) {
        this.parent = parent;
    }

    private static native Object newInstance0(Constructor c, Object[] args)
        throws InstantiationException,
               IllegalArgumentException,
               InvocationTargetException;
}