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