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 *
017 */
018package org.apache.bcel.generic;
019
020import org.apache.bcel.ExceptionConst;
021
022/**
023 * ANEWARRAY -  Create new array of references
024 * <PRE>Stack: ..., count -&gt; ..., arrayref</PRE>
025 *
026 * @version $Id: ANEWARRAY.java 1812166 2017-10-13 23:48:11Z ggregory $
027 */
028public class ANEWARRAY extends CPInstruction implements LoadClass, AllocationInstruction,
029        ExceptionThrower, StackConsumer, StackProducer {
030
031    /**
032     * Empty constructor needed for Instruction.readInstruction.
033     * Not to be used otherwise.
034     */
035    ANEWARRAY() {
036    }
037
038
039    public ANEWARRAY(final int index) {
040        super(org.apache.bcel.Const.ANEWARRAY, index);
041    }
042
043
044    @Override
045    public Class<?>[] getExceptions() {
046        return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_CLASS_AND_INTERFACE_RESOLUTION,
047            ExceptionConst.NEGATIVE_ARRAY_SIZE_EXCEPTION);
048    }
049
050
051    /**
052     * Call corresponding visitor method(s). The order is:
053     * Call visitor methods of implemented interfaces first, then
054     * call methods according to the class hierarchy in descending order,
055     * i.e., the most specific visitXXX() call comes last.
056     *
057     * @param v Visitor object
058     */
059    @Override
060    public void accept( final Visitor v ) {
061        v.visitLoadClass(this);
062        v.visitAllocationInstruction(this);
063        v.visitExceptionThrower(this);
064        v.visitStackProducer(this);
065        v.visitTypedInstruction(this);
066        v.visitCPInstruction(this);
067        v.visitANEWARRAY(this);
068    }
069
070
071    @Override
072    public ObjectType getLoadClassType( final ConstantPoolGen cpg ) {
073        Type t = getType(cpg);
074        if (t instanceof ArrayType) {
075            t = ((ArrayType) t).getBasicType();
076        }
077        return (t instanceof ObjectType) ? (ObjectType) t : null;
078    }
079}