1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.bcel.generic;
20
21 import java.io.DataOutputStream;
22 import java.io.IOException;
23
24 import org.apache.bcel.Const;
25 import org.apache.bcel.ExceptionConst;
26
27 /**
28 * INVOKESPECIAL - Invoke instance method; special handling for superclass, private and instance initialization method
29 * invocations
30 *
31 * <pre>
32 * Stack: ..., objectref, [arg1, [arg2 ...]] -> ...
33 * </pre>
34 *
35 * @see <a href="https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-6.html#jvms-6.5.invokespecial"> The
36 * invokespecial instruction in The Java Virtual Machine Specification</a>
37 */
38 public class INVOKESPECIAL extends InvokeInstruction {
39
40 /**
41 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
42 */
43 INVOKESPECIAL() {
44 }
45
46 /**
47 * Constructs an INVOKESPECIAL instruction.
48 *
49 * @param index index into constant pool.
50 */
51 public INVOKESPECIAL(final int index) {
52 super(Const.INVOKESPECIAL, index);
53 }
54
55 /**
56 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
57 * methods according to the class hierarchy in descending order, that is, the most specific visitXXX() call comes last.
58 *
59 * @param v Visitor object.
60 */
61 @Override
62 public void accept(final Visitor v) {
63 v.visitExceptionThrower(this);
64 v.visitTypedInstruction(this);
65 v.visitStackConsumer(this);
66 v.visitStackProducer(this);
67 v.visitLoadClass(this);
68 v.visitCPInstruction(this);
69 v.visitFieldOrMethod(this);
70 v.visitInvokeInstruction(this);
71 v.visitINVOKESPECIAL(this);
72 }
73
74 /**
75 * Dumps instruction as byte code to stream out.
76 *
77 * @param out Output stream.
78 */
79 @Override
80 public void dump(final DataOutputStream out) throws IOException {
81 out.writeByte(super.getOpcode());
82 out.writeShort(super.getIndex());
83 }
84
85 @Override
86 public Class<?>[] getExceptions() {
87 return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_FIELD_AND_METHOD_RESOLUTION, ExceptionConst.NULL_POINTER_EXCEPTION,
88 ExceptionConst.INCOMPATIBLE_CLASS_CHANGE_ERROR, ExceptionConst.ABSTRACT_METHOD_ERROR, ExceptionConst.UNSATISFIED_LINK_ERROR);
89 }
90 }