1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.apache.bcel.generic;
18
19 import java.io.DataOutputStream;
20 import java.io.IOException;
21
22 import org.apache.bcel.Const;
23 import org.apache.bcel.ExceptionConst;
24
25 /**
26 * INVOKEVIRTUAL - Invoke instance method; dispatch based on class
27 *
28 * <PRE>
29 * Stack: ..., objectref, [arg1, [arg2 ...]] -> ...
30 * </PRE>
31 *
32 * @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokevirtual"> The
33 * invokevirtual instruction in The Java Virtual Machine Specification</a>
34 */
35 public class INVOKEVIRTUAL extends InvokeInstruction {
36
37 /**
38 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
39 */
40 INVOKEVIRTUAL() {
41 }
42
43 public INVOKEVIRTUAL(final int index) {
44 super(Const.INVOKEVIRTUAL, index);
45 }
46
47 /**
48 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
49 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
50 *
51 * @param v Visitor object
52 */
53 @Override
54 public void accept(final Visitor v) {
55 v.visitExceptionThrower(this);
56 v.visitTypedInstruction(this);
57 v.visitStackConsumer(this);
58 v.visitStackProducer(this);
59 v.visitLoadClass(this);
60 v.visitCPInstruction(this);
61 v.visitFieldOrMethod(this);
62 v.visitInvokeInstruction(this);
63 v.visitINVOKEVIRTUAL(this);
64 }
65
66 /**
67 * Dump instruction as byte code to stream out.
68 *
69 * @param out Output stream
70 */
71 @Override
72 public void dump(final DataOutputStream out) throws IOException {
73 out.writeByte(super.getOpcode());
74 out.writeShort(super.getIndex());
75 }
76
77 @Override
78 public Class<?>[] getExceptions() {
79 return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_FIELD_AND_METHOD_RESOLUTION, ExceptionConst.NULL_POINTER_EXCEPTION,
80 ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR, ExceptionConst.ABSTRACT_METHOD_ERROR, ExceptionConst.UNSATISFIED_LINK_ERROR);
81 }
82 }