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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  /***
    58   * ICONST - Push value between -1, ..., 5, other values cause an exception
    59   *
    60   * <PRE>Stack: ... -> ..., </PRE>
    61   *
    62   * @version $Id: ICONST.java,v 1.3 2002/08/07 18:01:32 mdahm Exp $
    63   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
    64   */
    65  public class ICONST extends Instruction
    66    implements ConstantPushInstruction, TypedInstruction {
    67    private int value;
    68
    69    /***
    70     * Empty constructor needed for the Class.newInstance() statement in
    71     * Instruction.readInstruction(). Not to be used otherwise.
    72     */
    73    ICONST() {}
    74
    75    public ICONST(int i) {
    76      super(org.apache.bcel.Constants.ICONST_0, (short)1);
    77
    78      if((i >= -1) && (i <= 5))
    79        opcode = (short)(org.apache.bcel.Constants.ICONST_0 + i); // Even works for i == -1
    80      else
    81        throw new ClassGenException("ICONST can be used only for value between -1 and 5: " +
    82  				  i);
    83      value = i;
    84    }
    85
    86    public Number getValue() { return new Integer(value); }
    87
    88    /*** @return Type.INT
    89     */
    90    public Type getType(ConstantPoolGen cp) {
    91      return Type.INT;
    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.visitPushInstruction(this);
    104     v.visitStackProducer(this);
    105     v.visitTypedInstruction(this);
    106     v.visitConstantPushInstruction(this);
    107     v.visitICONST(this);
    108   }
    109 }

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