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1   /*
2    * Copyright  2000-2004 The Apache Software Foundation
3    *
4    *  Licensed under the Apache License, Version 2.0 (the "License"); 
5    *  you may not use this file except in compliance with the License.
6    *  You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   *  Unless required by applicable law or agreed to in writing, software
11   *  distributed under the License is distributed on an "AS IS" BASIS,
12   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   *  See the License for the specific language governing permissions and
14   *  limitations under the License. 
15   *
16   */
17  package org.apache.bcel.generic;
18  
19  import org.apache.bcel.ExceptionConstants;
20  
21  /*** 
22   * ANEWARRAY -  Create new array of references
23   * <PRE>Stack: ..., count -&gt; ..., arrayref</PRE>
24   *
25   * @version $Id: ANEWARRAY.java 386056 2006-03-15 11:31:56Z tcurdt $
26   * @author  <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
27   */
28  public class ANEWARRAY extends CPInstruction implements LoadClass, AllocationInstruction,
29          ExceptionThrower, StackConsumer, StackProducer {
30  
31      /***
32       * Empty constructor needed for the Class.newInstance() statement in
33       * Instruction.readInstruction(). Not to be used otherwise.
34       */
35      ANEWARRAY() {
36      }
37  
38  
39      public ANEWARRAY(int index) {
40          super(org.apache.bcel.Constants.ANEWARRAY, index);
41      }
42  
43  
44      public Class[] getExceptions() {
45          Class[] cs = new Class[1 + ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length];
46          System.arraycopy(ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION, 0, cs, 0,
47                  ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length);
48          cs[ExceptionConstants.EXCS_CLASS_AND_INTERFACE_RESOLUTION.length] = ExceptionConstants.NEGATIVE_ARRAY_SIZE_EXCEPTION;
49          return cs;
50      }
51  
52  
53      /***
54       * Call corresponding visitor method(s). The order is:
55       * Call visitor methods of implemented interfaces first, then
56       * call methods according to the class hierarchy in descending order,
57       * i.e., the most specific visitXXX() call comes last.
58       *
59       * @param v Visitor object
60       */
61      public void accept( Visitor v ) {
62          v.visitLoadClass(this);
63          v.visitAllocationInstruction(this);
64          v.visitExceptionThrower(this);
65          v.visitStackProducer(this);
66          v.visitTypedInstruction(this);
67          v.visitCPInstruction(this);
68          v.visitANEWARRAY(this);
69      }
70  
71  
72      public ObjectType getLoadClassType( 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  }