1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.bcel.internal.generic; 22 23 /** 24 * LDC2_W - Push long or double from constant pool 25 * 26 * <PRE>Stack: ... -> ..., item.word1, item.word2</PRE> 27 * 28 * @version $Id: LDC2_W.java 1749603 2016-06-21 20:50:19Z ggregory $ 29 */ 30 public class LDC2_W extends CPInstruction implements PushInstruction { 31 32 /** 33 * Empty constructor needed for the Class.newInstance() statement in 34 * Instruction.readInstruction(). Not to be used otherwise. 35 */ 36 LDC2_W() { 37 } 38 39 40 public LDC2_W(final int index) { 41 super(com.sun.org.apache.bcel.internal.Const.LDC2_W, index); 42 } 43 44 45 @Override 46 public Type getType( final ConstantPoolGen cpg ) { 47 switch (cpg.getConstantPool().getConstant(super.getIndex()).getTag()) { 48 case com.sun.org.apache.bcel.internal.Const.CONSTANT_Long: 49 return Type.LONG; 50 case com.sun.org.apache.bcel.internal.Const.CONSTANT_Double: 51 return Type.DOUBLE; 52 default: // Never reached 53 throw new RuntimeException("Unknown constant type " + super.getOpcode()); 54 } 55 } 56 57 58 public Number getValue( final ConstantPoolGen cpg ) { 59 final com.sun.org.apache.bcel.internal.classfile.Constant c = cpg.getConstantPool().getConstant(super.getIndex()); 60 switch (c.getTag()) { 61 case com.sun.org.apache.bcel.internal.Const.CONSTANT_Long: 62 return Long.valueOf(((com.sun.org.apache.bcel.internal.classfile.ConstantLong) c).getBytes()); 63 case com.sun.org.apache.bcel.internal.Const.CONSTANT_Double: 64 return new Double(((com.sun.org.apache.bcel.internal.classfile.ConstantDouble) c).getBytes()); 65 default: // Never reached 66 throw new RuntimeException("Unknown or invalid constant type at " + super.getIndex()); 67 } 68 } 69 70 71 /** 72 * Call corresponding visitor method(s). The order is: 73 * Call visitor methods of implemented interfaces first, then 74 * call methods according to the class hierarchy in descending order, 75 * i.e., the most specific visitXXX() call comes last. 76 * 77 * @param v Visitor object 78 */ 79 @Override 80 public void accept( final Visitor v ) { 81 v.visitStackProducer(this); 82 v.visitPushInstruction(this); 83 v.visitTypedInstruction(this); 84 v.visitCPInstruction(this); 85 v.visitLDC2_W(this); 86 } 87 }