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 import java.io.DataOutputStream; 25 import java.io.IOException; 26 27 import com.sun.org.apache.bcel.internal.Const; 28 import com.sun.org.apache.bcel.internal.ExceptionConst; 29 import com.sun.org.apache.bcel.internal.classfile.ConstantInvokeDynamic; 30 import com.sun.org.apache.bcel.internal.classfile.ConstantNameAndType; 31 import com.sun.org.apache.bcel.internal.classfile.ConstantPool; 32 import com.sun.org.apache.bcel.internal.util.ByteSequence; 33 34 /** 35 * Class for INVOKEDYNAMIC. Not an instance of InvokeInstruction, since that class 36 * expects to be able to get the class of the method. Ignores the bootstrap 37 * mechanism entirely. 38 * 39 * @version $Id: InvokeInstruction.java 1152072 2011-07-29 01:54:05Z dbrosius $ 40 * @see 41 * <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokedynamic"> 42 * The invokedynamic instruction in The Java Virtual Machine Specification</a> 43 * @since 6.0 44 */ 45 public class INVOKEDYNAMIC extends InvokeInstruction { 46 47 /** 48 * Empty constructor needed for the Class.newInstance() statement in 49 * Instruction.readInstruction(). Not to be used otherwise. 50 */ 51 INVOKEDYNAMIC() { 52 } 53 54 55 public INVOKEDYNAMIC(final int index) { 56 super(Const.INVOKEDYNAMIC, index); 57 } 58 59 60 /** 61 * Dump instruction as byte code to stream out. 62 * @param out Output stream 63 */ 64 @Override 65 public void dump( final DataOutputStream out ) throws IOException { 66 out.writeByte(super.getOpcode()); 67 out.writeShort(super.getIndex()); 68 out.writeByte(0); 69 out.writeByte(0); 70 } 71 72 73 /** 74 * Read needed data (i.e., index) from file. 75 */ 76 @Override 77 protected void initFromFile( final ByteSequence bytes, final boolean wide ) throws IOException { 78 super.initFromFile(bytes, wide); 79 super.setLength(5); 80 bytes.readByte(); // Skip 0 byte 81 bytes.readByte(); // Skip 0 byte 82 } 83 84 85 /** 86 * @return mnemonic for instruction with symbolic references resolved 87 */ 88 @Override 89 public String toString( final ConstantPool cp ) { 90 return super.toString(cp); 91 } 92 93 94 @Override 95 public Class<?>[] getExceptions() { 96 return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_INTERFACE_METHOD_RESOLUTION, 97 ExceptionConst.UNSATISFIED_LINK_ERROR, 98 ExceptionConst.ABSTRACT_METHOD_ERROR, 99 ExceptionConst.ILLEGAL_ACCESS_ERROR, 100 ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR); 101 } 102 103 104 /** 105 * Call corresponding visitor method(s). The order is: 106 * Call visitor methods of implemented interfaces first, then 107 * call methods according to the class hierarchy in descending order, 108 * i.e., the most specific visitXXX() call comes last. 109 * 110 * @param v Visitor object 111 */ 112 @Override 113 public void accept( final Visitor v ) { 114 v.visitExceptionThrower(this); 115 v.visitTypedInstruction(this); 116 v.visitStackConsumer(this); 117 v.visitStackProducer(this); 118 v.visitLoadClass(this); 119 v.visitCPInstruction(this); 120 v.visitFieldOrMethod(this); 121 v.visitInvokeInstruction(this); 122 v.visitINVOKEDYNAMIC(this); 123 } 124 125 /** 126 * Override the parent method because our classname is held elsewhere. 127 */ 128 @Override 129 public String getClassName( final ConstantPoolGen cpg ) { 130 final ConstantPool cp = cpg.getConstantPool(); 131 final ConstantInvokeDynamic cid = (ConstantInvokeDynamic) cp.getConstant(super.getIndex(), Const.CONSTANT_InvokeDynamic); 132 return ((ConstantNameAndType) cp.getConstant(cid.getNameAndTypeIndex())).getName(cp); 133 } 134 }