ANEWARRAY xref

View Javadoc

    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  }