001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 *  Unless required by applicable law or agreed to in writing, software
012 *  distributed under the License is distributed on an "AS IS" BASIS,
013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 *  See the License for the specific language governing permissions and
015 *  limitations under the License.
016 */
017package org.apache.bcel.generic;
018
019import org.apache.bcel.ExceptionConst;
020
021/**
022 * MONITORENTER - Enter monitor for object
023 *
024 * <PRE>
025 * Stack: ..., objectref -&gt; ...
026 * </PRE>
027 */
028public class MONITORENTER extends Instruction implements ExceptionThrower, StackConsumer {
029
030    public MONITORENTER() {
031        super(org.apache.bcel.Const.MONITORENTER, (short) 1);
032    }
033
034    /**
035     * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
036     * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
037     *
038     * @param v Visitor object
039     */
040    @Override
041    public void accept(final Visitor v) {
042        v.visitExceptionThrower(this);
043        v.visitStackConsumer(this);
044        v.visitMONITORENTER(this);
045    }
046
047    @Override
048    public Class<?>[] getExceptions() {
049        return new Class[] {ExceptionConst.NULL_POINTER_EXCEPTION};
050    }
051}