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: ... -> ..., null</PRE> 27 * 28 * @version $Id$ 29 */ 30 public class ACONST_NULL extends Instruction implements PushInstruction, TypedInstruction { 31 32 /** 33 * Push null reference 34 */ 35 public ACONST_NULL() { 36 super(com.sun.org.apache.bcel.internal.Const.ACONST_NULL, (short) 1); 37 } 38 39 40 /** @return Type.NULL 41 */ 42 @Override 43 public Type getType( final ConstantPoolGen cp ) { 44 return Type.NULL; 45 } 46 47 48 /** 49 * Call corresponding visitor method(s). The order is: 50 * Call visitor methods of implemented interfaces first, then 51 * call methods according to the class hierarchy in descending order, 52 * i.e., the most specific visitXXX() call comes last. 53 * 54 * @param v Visitor object 55 */ 56 @Override 57 public void accept( final Visitor v ) { 58 v.visitStackProducer(this); 59 v.visitPushInstruction(this); 60 v.visitTypedInstruction(this); 61 v.visitACONST_NULL(this); 62 } 63 }