1 /*
   2  * reserved comment block
   3  * DO NOT REMOVE OR ALTER!
   4  */
   5 /*
   6  * Licensed to the Apache Software Foundation (ASF) under one or more
   7  * contributor license agreements.  See the NOTICE file distributed with
   8  * this work for additional information regarding copyright ownership.
   9  * The ASF licenses this file to You under the Apache License, Version 2.0
  10  * (the "License"); you may not use this file except in compliance with
  11  * the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  * Unless required by applicable law or agreed to in writing, software
  16  * distributed under the License is distributed on an "AS IS" BASIS,
  17  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  18  * See the License for the specific language governing permissions and
  19  * limitations under the License.
  20  */
  21 
  22 package com.sun.org.apache.bcel.internal.generic;
  23 
  24 /**
  25  * ACONST_NULL - Push null reference
  26  * <PRE>Stack: ... -&gt; ..., null</PRE>
  27  *
  28  */
  29 public class ACONST_NULL extends Instruction implements PushInstruction, TypedInstruction {
  30 
  31     /**
  32      * Push null reference
  33      */
  34     public ACONST_NULL() {
  35         super(com.sun.org.apache.bcel.internal.Const.ACONST_NULL, (short) 1);
  36     }
  37 
  38 
  39     /** @return Type.NULL
  40      */
  41     @Override
  42     public Type getType( final ConstantPoolGen cp ) {
  43         return Type.NULL;
  44     }
  45 
  46 
  47     /**
  48      * Call corresponding visitor method(s). The order is:
  49      * Call visitor methods of implemented interfaces first, then
  50      * call methods according to the class hierarchy in descending order,
  51      * i.e., the most specific visitXXX() call comes last.
  52      *
  53      * @param v Visitor object
  54      */
  55     @Override
  56     public void accept( final Visitor v ) {
  57         v.visitStackProducer(this);
  58         v.visitPushInstruction(this);
  59         v.visitTypedInstruction(this);
  60         v.visitACONST_NULL(this);
  61     }
  62 }