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    1   package org.apache.bcel.generic;
    2
    3   /* ====================================================================
    4    * The Apache Software License, Version 1.1
    5    *
    6    * Copyright (c) 2001 The Apache Software Foundation.  All rights
    7    * reserved.
    8    *
    9    * Redistribution and use in source and binary forms, with or without
    10   * modification, are permitted provided that the following conditions
    11   * are met:
    12   *
    13   * 1. Redistributions of source code must retain the above copyright
    14   *    notice, this list of conditions and the following disclaimer.
    15   *
    16   * 2. Redistributions in binary form must reproduce the above copyright
    17   *    notice, this list of conditions and the following disclaimer in
    18   *    the documentation and/or other materials provided with the
    19   *    distribution.
    20   *
    21   * 3. The end-user documentation included with the redistribution,
    22   *    if any, must include the following acknowledgment:
    23   *       "This product includes software developed by the
    24   *        Apache Software Foundation (http://www.apache.org/)."
    25   *    Alternately, this acknowledgment may appear in the software itself,
    26   *    if and wherever such third-party acknowledgments normally appear.
    27   *
    28   * 4. The names "Apache" and "Apache Software Foundation" and
    29   *    "Apache BCEL" must not be used to endorse or promote products
    30   *    derived from this software without prior written permission. For
    31   *    written permission, please contact apache@apache.org.
    32   *
    33   * 5. Products derived from this software may not be called "Apache",
    34   *    "Apache BCEL", nor may "Apache" appear in their name, without
    35   *    prior written permission of the Apache Software Foundation.
    36   *
    37   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
    38   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
    39   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
    40   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
    41   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    42   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    43   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
    44   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
    45   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
    46   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
    47   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    48   * SUCH DAMAGE.
    49   * ====================================================================
    50   *
    51   * This software consists of voluntary contributions made by many
    52   * individuals on behalf of the Apache Software Foundation.  For more
    53   * information on the Apache Software Foundation, please see
    54   * <http://www.apache.org/>;.
    55   */
    56
    57  import org.apache.bcel.Constants;
    58  import org.apache.bcel.ExceptionConstants;
    59
    60  /***
    61   * GETSTATIC - Fetch static field from class
    62   * <PRE>Stack: ..., -> ..., value</PRE>
    63   * OR
    64   * <PRE>Stack: ..., -> ..., value.word1, value.word2</PRE>
    65   *
    66   * @version $Id: GETSTATIC.java,v 1.1.1.1 2001/10/29 20:00:13 jvanzyl Exp $
    67   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
    68   */
    69  public class GETSTATIC extends FieldInstruction implements PushInstruction, ExceptionThrower {
    70    /***
    71     * Empty constructor needed for the Class.newInstance() statement in
    72     * Instruction.readInstruction(). Not to be used otherwise.
    73     */
    74    GETSTATIC() {}
    75
    76    public GETSTATIC(int index) {
    77      super(Constants.GETSTATIC, index);
    78    }
    79
    80    public int produceStack(ConstantPoolGen cpg) { return getFieldSize(cpg); }
    81
    82    public Class[] getExceptions() {
    83      Class[] cs = new Class[1 + ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length];
    84
    85      System.arraycopy(ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION, 0,
    86  		     cs, 0, ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length);
    87      cs[ExceptionConstants.EXCS_FIELD_AND_METHOD_RESOLUTION.length] =
    88        ExceptionConstants.INCOMPATIBLE_CLASS_CHANGE_ERROR;
    89
    90      return cs;
    91    }
    92
    93
    94    /***
    95     * Call corresponding visitor method(s). The order is:
    96     * Call visitor methods of implemented interfaces first, then
    97     * call methods according to the class hierarchy in descending order,
    98     * i.e., the most specific visitXXX() call comes last.
    99     *
    100    * @param v Visitor object
    101    */
    102   public void accept(Visitor v) {
    103     v.visitStackProducer(this);
    104     v.visitPushInstruction(this);
    105     v.visitExceptionThrower(this);
    106     v.visitTypedInstruction(this);
    107     v.visitLoadClass(this);
    108     v.visitCPInstruction(this);
    109     v.visitFieldOrMethod(this);
    110     v.visitFieldInstruction(this);
    111     v.visitGETSTATIC(this);
    112   }
    113 }

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