jaxbelementskeleton.java

来自「RESIN 3.2 最新源码」· Java 代码 · 共 94 行

/*
 * Copyright (c) 1998-2007 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Emil Ong
 */

package com.caucho.jaxb.skeleton;

import com.caucho.jaxb.JAXBContextImpl;
import com.caucho.jaxb.accessor.Accessor;
import com.caucho.jaxb.accessor.JAXBElementAccessor;
import com.caucho.jaxb.mapping.JAXBElementMapping;
import com.caucho.util.L10N;

import javax.xml.bind.annotation.*;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.namespace.QName;

import java.lang.reflect.Method;
import java.util.logging.Logger;

public class JAXBElementSkeleton<C> extends ClassSkeleton<JAXBElement<C>> {
  private static final Logger log 
    = Logger.getLogger(JAXBElementSkeleton.class.getName());
  private static final L10N L = new L10N(JAXBElementSkeleton.class);
  private static final Object[] SINGLE_NULL_ARG = new Object[] {null};

  private final Class<C> _contents;
  private final Method _createMethod;
  private final Object _factory;
  private final JAXBElementAccessor _accessor;

  public JAXBElementSkeleton(JAXBContextImpl context, Class<C> cl,
                             Method createMethod, Object factory)
    throws JAXBException
  {
    super(context);

    _contents = cl;
    _createMethod = createMethod;
    _factory = factory;

    JAXBElementMapping mapping = new JAXBElementMapping(context);
    mapping.setQName(_elementName);
    mapping.setProperty(context.createProperty(cl));
    _value = mapping;

    _accessor = (JAXBElementAccessor) _value.getAccessor();
    _accessor.setType(cl);
  }

  public JAXBElement<C> newInstance()
    throws JAXBException
  {
    try {
      // passing a null makes invoke think that it is receiving a null instance
      // of an Object[].  need an explicit array with a null.
      return (JAXBElement<C>) _createMethod.invoke(_factory, SINGLE_NULL_ARG);
    }
    catch (Exception e) {
      throw new JAXBException(e);
    }
  }

  public String toString()
  {
    return "JAXBElementSkeleton[" + _contents + "]";
  }
}