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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.Constants;
    20  import org.apache.bcel.ExceptionConstants;
    21
    22  /***
    23   * INVOKEVIRTUAL - Invoke instance method; dispatch based on class
    24   *
    25   * <PRE>Stack: ..., objectref, [arg1, [arg2 ...]] -&gt; ...</PRE>
    26   *
    27   * @version $Id: INVOKEVIRTUAL.java 386056 2006-03-15 11:31:56Z tcurdt $
    28   * @author  <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
    29   */
    30  public class INVOKEVIRTUAL extends InvokeInstruction {
    31
    32      /***
    33       * Empty constructor needed for the Class.newInstance() statement in
    34       * Instruction.readInstruction(). Not to be used otherwise.
    35       */
    36      INVOKEVIRTUAL() {
    37      }
    38
    39
    40      public INVOKEVIRTUAL(int index) {
    41          super(Constants.INVOKEVIRTUAL, index);
    42      }
    43
    44
    45      public Class[] getExceptions() {
    46          Class[] cs = new Class[4 + ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length];
    47          System.arraycopy(ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION, 0, cs, 0,
    48                  ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length);
    49          cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length + 3] = ExceptionConstants.UNSATISFIED_LINK_ERROR;
    50          cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length + 2] = ExceptionConstants.ABSTRACT_METHOD_ERROR;
    51          cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length + 1] = ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
    52          cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length] = ExceptionConstants.NULL_POINTER_EXCEPTION;
    53          return cs;
    54      }
    55
    56
    57      /***
    58       * Call corresponding visitor method(s). The order is:
    59       * Call visitor methods of implemented interfaces first, then
    60       * call methods according to the class hierarchy in descending order,
    61       * i.e., the most specific visitXXX() call comes last.
    62       *
    63       * @param v Visitor object
    64       */
    65      public void accept( Visitor v ) {
    66          v.visitExceptionThrower(this);
    67          v.visitTypedInstruction(this);
    68          v.visitStackConsumer(this);
    69          v.visitStackProducer(this);
    70          v.visitLoadClass(this);
    71          v.visitCPInstruction(this);
    72          v.visitFieldOrMethod(this);
    73          v.visitInvokeInstruction(this);
    74          v.visitINVOKEVIRTUAL(this);
    75      }
    76  }