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Java example source code file (VMObjectFactory.java)

This example Java source code file (VMObjectFactory.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

address, class, constructionexception, constructor, exception, object, reflection, runtimeexception, vmobjectfactory

The VMObjectFactory.java Java example source code

/*
 * Copyright (c) 2000, 2012, 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.
 *
 * 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
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package sun.jvm.hotspot.runtime;

import java.lang.reflect.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.types.*;

/** <P> This class implements a factory mechanism for the objects
    created to wrap Addresses. It requires that the class passed in
    implement a constructor taking with the following signature: </P>

    <P>
    <CODE> public <Type>(sun.jvm.hotspot.Address)
    </CODE>
    </P>

    <P> It is used to write shorter code when wrapping Addresses since
    null checks are no longer necessary. In addition, it is a central
    location where a canonicalizing map could be implemented if one
    were desired (though the current system is designed to not require
    one.) </P>
*/

public class VMObjectFactory {
  public static Object newObject(Class clazz, Address addr)
    throws ConstructionException {
    try {
      if (addr == null) {
        return null;
      }

      Constructor c = clazz.getConstructor(new Class[] {
        Address.class
      });
      return c.newInstance(new Object[] { addr });
    }
    catch (java.lang.reflect.InvocationTargetException ite) {
        if (ite.getTargetException() instanceof RuntimeException) {
            throw (RuntimeException)ite.getTargetException();
        }
        throw new ConstructionException(ite);
    }
    catch (Exception e) {
      throw new ConstructionException(e);
    }
  }
}

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