    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one
    003 * or more contributor license agreements.  See the NOTICE file
    004 * distributed with this work for additional information
    005 * regarding copyright ownership.  The ASF licenses this file
    006 * to you under the Apache License, Version 2.0 (the
    007 * "License"); you may not use this file except in compliance
    008 * with the License.  You may obtain a copy of the License at
    009 *
    010 *   https://www.apache.org/licenses/LICENSE-2.0
    011 *
    012 * Unless required by applicable law or agreed to in writing,
    013 * software distributed under the License is distributed on an
    014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    015 * KIND, either express or implied.  See the License for the
    016 * specific language governing permissions and limitations
    017 * under the License.
    018 */
    019package org.apache.bcel.generic;
    020
    021/**
    022 * Denotes an unparameterized instruction to load a value from a local variable, for example ILOAD.
    023 */
    024public abstract class LoadInstruction extends LocalVariableInstruction implements PushInstruction {
    025
    026    /**
    027     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise. tag and length are defined in
    028     * readInstruction and initFromFile, respectively.
    029     */
    030    LoadInstruction(final short canonTag, final short cTag) {
    031        super(canonTag, cTag);
    032    }
    033
    034    /**
    035     * Constructs a LoadInstruction.
    036     *
    037     * @param opcode Instruction opcode.
    038     * @param cTag Instruction number for compact version, ALOAD_0, for example.
    039     * @param n local variable index (unsigned short).
    040     */
    041    protected LoadInstruction(final short opcode, final short cTag, final int n) {
    042        super(opcode, cTag, n);
    043    }
    044
    045    /**
    046     * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
    047     * methods according to the class hierarchy in descending order, that is, the most specific visitXXX() call comes last.
    048     *
    049     * @param v Visitor object.
    050     */
    051    @Override
    052    public void accept(final Visitor v) {
    053        v.visitStackProducer(this);
    054        v.visitPushInstruction(this);
    055        v.visitTypedInstruction(this);
    056        v.visitLocalVariableInstruction(this);
    057        v.visitLoadInstruction(this);
    058    }
    059}