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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  import java.io.*;
    57  import org.apache.bcel.util.ByteSequence;
    58
    59  /***
    60   * NEWARRAY -  Create new array of basic type (int, short, ...)
    61   * <PRE>Stack: ..., count -> ..., arrayref</PRE>
    62   * type must be one of T_INT, T_SHORT, ...
    63   *
    64   * @version $Id: NEWARRAY.java,v 1.2 2002/08/07 18:01:32 mdahm Exp $
    65   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
    66   */
    67  public class NEWARRAY extends Instruction
    68    implements AllocationInstruction, ExceptionThrower, StackProducer {
    69    private byte type;
    70
    71    /***
    72     * Empty constructor needed for the Class.newInstance() statement in
    73     * Instruction.readInstruction(). Not to be used otherwise.
    74     */
    75    NEWARRAY() {}
    76
    77    public NEWARRAY(byte type) {
    78      super(org.apache.bcel.Constants.NEWARRAY, (short)2);
    79      this.type = type;
    80    }
    81
    82    public NEWARRAY(BasicType type) {
    83        this(type.getType());
    84    }
    85
    86    /***
    87     * Dump instruction as byte code to stream out.
    88     * @param out Output stream
    89     */
    90    public void dump(DataOutputStream out) throws IOException {
    91      out.writeByte(opcode);
    92      out.writeByte(type);
    93    }
    94
    95    /***
    96     * @return numeric code for basic element type
    97     */
    98    public final byte getTypecode() { return type; }
    99
    100   /***
    101    * @return type of constructed array
    102    */
    103   public final Type getType() {
    104     return new ArrayType(BasicType.getType(type), 1);
    105   }
    106
    107   /***
    108    * @return mnemonic for instruction
    109    */
    110   public String toString(boolean verbose) {
    111     return super.toString(verbose) + " " + org.apache.bcel.Constants.TYPE_NAMES[type];
    112   }
    113   /***
    114    * Read needed data (e.g. index) from file.
    115    */
    116   protected void initFromFile(ByteSequence bytes, boolean wide) throws IOException
    117   {
    118     type   = bytes.readByte();
    119     length = 2;
    120   }
    121
    122   public Class[] getExceptions() {
    123     return new Class[] { org.apache.bcel.ExceptionConstants.NEGATIVE_ARRAY_SIZE_EXCEPTION };
    124   }
    125
    126   /***
    127    * Call corresponding visitor method(s). The order is:
    128    * Call visitor methods of implemented interfaces first, then
    129    * call methods according to the class hierarchy in descending order,
    130    * i.e., the most specific visitXXX() call comes last.
    131    *
    132    * @param v Visitor object
    133    */
    134   public void accept(Visitor v) {
    135     v.visitAllocationInstruction(this);
    136     v.visitExceptionThrower(this);
    137     v.visitStackProducer(this);
    138     v.visitNEWARRAY(this);
    139   }
    140 }

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