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Java > Open Source Codes > com > sun > org > apache > bcel > internal > generic > NEWARRAY


1 package com.sun.org.apache.bcel.internal.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 com.sun.org.apache.bcel.internal.util.ByteSequence;
58
59 /**
60  * NEWARRAY - Create new array of basic type (int, short, ...)
61  * <PRE>Stack: ..., count -&gt; ..., arrayref</PRE>
62  * type must be one of T_INT, T_SHORT, ...
63  *
64  * @version $Id: NEWARRAY.java,v 1.1.1.1 2001/10/29 20:00:25 jvanzyl 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(com.sun.org.apache.bcel.internal.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 JavaDoc toString(boolean verbose) {
111     return super.toString(verbose) + " " + com.sun.org.apache.bcel.internal.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 JavaDoc[] getExceptions() {
123     return new Class JavaDoc[] { com.sun.org.apache.bcel.internal.ExceptionConstants.NEGATIVE_ARRAY_SIZE_EXCEPTION };
124   }
125
126
127   /**
128    * Call corresponding visitor method(s). The order is:
129    * Call visitor methods of implemented interfaces first, then
130    * call methods according to the class hierarchy in descending order,
131    * i.e., the most specific visitXXX() call comes last.
132    *
133    * @param v Visitor object
134    */
135   public void accept(Visitor v) {
136     v.visitAllocationInstruction(this);
137     v.visitExceptionThrower(this);
138     v.visitStackProducer(this);
139     v.visitNEWARRAY(this);
140   }
141 }
142
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