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
021import org.apache.bcel.ExceptionConst;
022
023/**
024 * MONITORENTER - Enter monitor for object
025 *
026 * <PRE>
027 * Stack: ..., objectref -&gt; ...
028 * </PRE>
029 */
030public class MONITORENTER extends Instruction implements ExceptionThrower, StackConsumer {
031
032    public MONITORENTER() {
033        super(org.apache.bcel.Const.MONITORENTER, (short) 1);
034    }
035
036    /**
037     * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
038     * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
039     *
040     * @param v Visitor object
041     */
042    @Override
043    public void accept(final Visitor v) {
044        v.visitExceptionThrower(this);
045        v.visitStackConsumer(this);
046        v.visitMONITORENTER(this);
047    }
048
049    @Override
050    public Class<?>[] getExceptions() {
051        return new Class[] {ExceptionConst.NULL_POINTER_EXCEPTION};
052    }
053}