/* FieldOnlyFilter.java -- filter on field
   Copyright (C) 2005 Free Software Foundation

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
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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
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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
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terms of your choice, provided that you also meet, for each linked
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
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package gnu.classpath.jdwp.event.filters;

import gnu.classpath.jdwp.event.Event;
import gnu.classpath.jdwp.exception.InvalidClassException;
import gnu.classpath.jdwp.exception.InvalidFieldException;
import gnu.classpath.jdwp.id.ReferenceTypeId;

/**
 * Restricts reported events to those that occur for a given field.
 * 
 * This modifier can be used with field access and field modification event
 * kinds only.
 *
 * @author Keith Seitz  (keiths@redhat.com)
 */
public class FieldOnlyFilter
  implements IEventFilter
{
  private ReferenceTypeId _refId;
  private ReferenceTypeId _fieldId;

  /**
   * Constructs a new <code>FieldOnlyFilter</code>.
   *
   * @param  refId  class for field
   * @param  fid    field
   * @throws InvalidClassException if class is invalid
   * @throws InvalidFieldException if field is invalid
   */
  public FieldOnlyFilter (ReferenceTypeId refId, /*Field*/ReferenceTypeId fid)
    throws InvalidClassException, InvalidFieldException
  {
    if (refId == null || refId.getReference().get () == null)
      throw new InvalidClassException (refId.getId ());

    if (fid == null)
      throw new InvalidFieldException (fid.getId ());

    _refId = refId;
    _fieldId = fid;
  }

  /**
   * Returns the class in which the field is declared 
   *
   * @return the class's id
   */
  public ReferenceTypeId getType ()
  {
    return _refId;
  }

  /**
   * Returns the field for which to restrict events
   *
   * @return the field's id
   */
  public ReferenceTypeId getField ()
  {
    return _fieldId;
  }

  /**
   * Does the given event match the filter?
   *
   * @param event  the <code>Event</code> to scrutinize
   */
  public boolean matches (Event event)
  {
    // FIXME
    throw new RuntimeException ("FieldOnlyFilter.matches not implemented");
  }
}