1 /*
   2  * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.scenario.effect;
  27 
  28 /**
  29  *
  30  */
  31 public class FilterContext {
  32 
  33     private Object referent;
  34     
  35     protected FilterContext(Object referent) {
  36         if (referent == null) {
  37             throw new IllegalArgumentException("Referent must be non-null");
  38         }
  39         this.referent = referent;
  40     }
  41     
  42     public final Object getReferent() {
  43         return referent;
  44     }
  45 
  46     @Override
  47     public int hashCode() {
  48         return referent.hashCode();
  49     }
  50 
  51     @Override
  52     public boolean equals(Object o) {
  53         if (!(o instanceof FilterContext)) {
  54             return false;
  55         }
  56         FilterContext that = (FilterContext)o;
  57         return referent.equals(that.referent);
  58     }
  59 }