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/* gnu.java.beans.decoder.ArrayContext

   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;

import java.lang.reflect.Array;

/** A Context implementation for a fixed size array. The array

 * elements have to be set using IndexContext instances.

 *

 * @author Robert Schuster

 */

class ArrayContext extends AbstractContext

{

  private Object array;

  ArrayContext(String id, Class klass, int length)

  {

    setId(id);

    array = Array.newInstance(klass, length);

  }

  /* (non-Javadoc)

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

   */

  public void addParameterObject(Object o) throws AssemblyException

  {

    throw new AssemblyException(new IllegalStateException("Adding objects without an index to a fixed array is not possible."));

  }

  /* (non-Javadoc)

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

   */

  public void notifyStatement(Context outerContext)

  {

    // method call intentionally ignored because there is not any useful effect 

  }

  /* (non-Javadoc)

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

   */

  public Object endContext(Context outerContext) throws AssemblyException

  {

    return array;

  }

  /* (non-Javadoc)

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

   */

  public boolean subContextFailed()

  {

    // returns false to indicate that assembling the array does not fail only because

    // a subelement failed.

    return false;

  }

  public void set(int index, Object o) throws AssemblyException

  {

    try

      {

        Array.set(array, index, o);

      }

    catch (ArrayIndexOutOfBoundsException aioobe)

      {

        throw new AssemblyException(aioobe);

      }

  }

  public Object get(int index) throws AssemblyException

  {

    try

      {

        return Array.get(array, index);

      }

    catch (ArrayIndexOutOfBoundsException aioobe)

      {

        throw new AssemblyException(aioobe);

      }

  }

  /* (non-Javadoc)

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

   */

  public Object getResult()

  {

    return array;

  }

}