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 */ 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 }