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      1 /*
      2  * Licensed to the Apache Software Foundation (ASF) under one or more
      3  * contributor license agreements.  See the NOTICE file distributed with
      4  * this work for additional information regarding copyright ownership.
      5  * The ASF licenses this file to You under the Apache License, Version 2.0
      6  * (the "License"); you may not use this file except in compliance with
      7  * the License.  You may obtain a copy of the License at
      8  *
      9  *      http://www.apache.org/licenses/LICENSE-2.0
     10  *
     11  *  Unless required by applicable law or agreed to in writing, software
     12  *  distributed under the License is distributed on an "AS IS" BASIS,
     13  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     14  *  See the License for the specific language governing permissions and
     15  *  limitations under the License.
     16  *
     17  */
     18 package org.apache.bcel.generic;
     19 
     20 import org.apache.bcel.ExceptionConst;
     21 
     22 /**
     23  * ANEWARRAY -  Create new array of references
     24  * <PRE>Stack: ..., count -&gt; ..., arrayref</PRE>
     25  *
     26  * @version $Id$
     27  */
     28 public class ANEWARRAY extends CPInstruction implements LoadClass, AllocationInstruction,
     29         ExceptionThrower, StackConsumer, StackProducer {
     30 
     31     /**
     32      * Empty constructor needed for Instruction.readInstruction.
     33      * Not to be used otherwise.
     34      */
     35     ANEWARRAY() {
     36     }
     37 
     38 
     39     public ANEWARRAY(final int index) {
     40         super(org.apache.bcel.Const.ANEWARRAY, index);
     41     }
     42 
     43 
     44     @Override
     45     public Class<?>[] getExceptions() {
     46         return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_CLASS_AND_INTERFACE_RESOLUTION,
     47             ExceptionConst.NEGATIVE_ARRAY_SIZE_EXCEPTION);
     48     }
     49 
     50 
     51     /**
     52      * Call corresponding visitor method(s). The order is:
     53      * Call visitor methods of implemented interfaces first, then
     54      * call methods according to the class hierarchy in descending order,
     55      * i.e., the most specific visitXXX() call comes last.
     56      *
     57      * @param v Visitor object
     58      */
     59     @Override
     60     public void accept( final Visitor v ) {
     61         v.visitLoadClass(this);
     62         v.visitAllocationInstruction(this);
     63         v.visitExceptionThrower(this);
     64         v.visitStackProducer(this);
     65         v.visitTypedInstruction(this);
     66         v.visitCPInstruction(this);
     67         v.visitANEWARRAY(this);
     68     }
     69 
     70 
     71     @Override
     72     public ObjectType getLoadClassType( final ConstantPoolGen cpg ) {
     73         Type t = getType(cpg);
     74         if (t instanceof ArrayType) {
     75             t = ((ArrayType) t).getBasicType();
     76         }
     77         return (t instanceof ObjectType) ? (ObjectType) t : null;
     78     }
     79 }
     80