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/* gnu.java.beans.decoder.ObjectHandler

   Copyright (C) 2004 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath 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, or (at your option)

any later version.

GNU Classpath 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 for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package gnu.java.beans.decoder;

/** ObjectContext is a {@link Context} implementation that wraps a simple Object instance.

 * The instance can be provided when the Context is created (due to an 'idref'

 * attribute) or later (eg. <int> tag)

 *

 * <p>The ObjectContext does not accept any parameter object and ignores notifications

 * about sub-contexts being statements.</p>

 *

 * @author Robert Schuster

 */

final class ObjectContext extends AbstractObjectContext

{

  ObjectContext(Object newObject)

  {

    setObject(newObject);

  }

  ObjectContext(String id, Object newObject)

  {

    setId(id);

    setObject(newObject);

  }

  ObjectContext()

  {

  }

  /* (non-Javadoc)

   * @see gnu.java.beans.decoder.Context#addObject(java.lang.Object)

   */

  public void addParameterObject(Object o) throws AssemblyException

  {

    throw new AssemblyException(new IllegalArgumentException("Adding objects to an ObjectContext is not allowed."));

  }

  /* (non-Javadoc)

   * @see gnu.java.beans.decoder.Context#reportStatement()

   */

  public void notifyStatement(Context outerContext) throws AssemblyException

  {

    // can ignore that

  }

  /* (non-Javadoc)

   * @see gnu.java.beans.decoder.Context#endContext(gnu.java.beans.decoder.Context)

   */

  public Object endContext(Context outerContext) throws AssemblyException

  {

    // just returns the object which is encapsuled (may be null)

    return getResult();

  }

  /* (non-Javadoc)

   * @see gnu.java.beans.decoder.Context#subContextFailed()

   */

  public boolean subContextFailed()

  {

    // this context will not fail when a subcontext fails because the result is

    // already available when the context is created.

    return false;

  }

}