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 /**
20 * Denotes an unparameterized instruction to load a value from a local variable, e.g. ILOAD.
21 */
22 public abstract class LoadInstruction extends LocalVariableInstruction implements PushInstruction {
23
24 /**
25 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise. tag and length are defined in
26 * readInstruction and initFromFile, respectively.
27 */
28 LoadInstruction(final short canonTag, final short cTag) {
29 super(canonTag, cTag);
30 }
31
32 /**
33 * @param opcode Instruction opcode
34 * @param cTag Instruction number for compact version, ALOAD_0, e.g.
35 * @param n local variable index (unsigned short)
36 */
37 protected LoadInstruction(final short opcode, final short cTag, final int n) {
38 super(opcode, cTag, n);
39 }
40
41 /**
42 * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
43 * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
44 *
45 * @param v Visitor object
46 */
47 @Override
48 public void accept(final Visitor v) {
49 v.visitStackProducer(this);
50 v.visitPushInstruction(this);
51 v.visitTypedInstruction(this);
52 v.visitLocalVariableInstruction(this);
53 v.visitLoadInstruction(this);
54 }
55 }