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comparison src/com/go/trove/classfile/ConstantInfo.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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1 /* ====================================================================
2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
3 * ====================================================================
4 * The Tea Software License, Version 1.1
5 *
6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. The end-user documentation included with the redistribution,
21 * if any, must include the following acknowledgment:
22 * "This product includes software developed by the
23 * Walt Disney Internet Group (http://opensource.go.com/)."
24 * Alternately, this acknowledgment may appear in the software itself,
25 * if and wherever such third-party acknowledgments normally appear.
26 *
27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
28 * not be used to endorse or promote products derived from this
29 * software without prior written permission. For written
30 * permission, please contact opensource@dig.com.
31 *
32 * 5. Products derived from this software may not be called "Tea",
33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
35 * written permission of the Walt Disney Internet Group.
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 WALT DISNEY INTERNET GROUP OR ITS
41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * For more information about Tea, please see http://opensource.go.com/.
51 */
52
53 package com.go.trove.classfile;
54
55 import java.io.*;
56
57 /******************************************************************************
58 * This class corresponds to the cp_info structure as defined in
59 * section 4.4 of <i>The Java Virtual Machine Specification</i>.
60 * Subclasses should override the default hashCode and equals methods so
61 * that the ConstantPool will only contain one instance of this constant.
62 *
63 * @author Brian S O'Neill
64 * @version
65 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 9/07/00 <!-- $-->
66 */
67 public abstract class ConstantInfo {
68 final static int TAG_UTF8 = 1;
69 final static int TAG_INTEGER = 3;
70 final static int TAG_FLOAT = 4;
71 final static int TAG_LONG = 5;
72 final static int TAG_DOUBLE = 6;
73 final static int TAG_CLASS = 7;
74 final static int TAG_STRING = 8;
75 final static int TAG_FIELD = 9;
76 final static int TAG_METHOD = 10;
77 final static int TAG_INTERFACE_METHOD = 11;
78 final static int TAG_NAME_AND_TYPE = 12;
79
80 // mIndex is manipulated by ConstantPool
81 int mIndex = -1;
82 private int mTag;
83
84 protected ConstantInfo(int tag) {
85 mTag = tag;
86 }
87
88 /**
89 * The index of this constant in the constant pool. Is -1 if the
90 * index has not yet been resolved. Constant pool indexes are resolved
91 * when the constant pool is written out.
92 */
93 public int getIndex() {
94 return mIndex;
95 }
96
97 boolean hasPriority() {
98 return false;
99 }
100
101 int getEntryCount() {
102 return 1;
103 }
104
105 public void writeTo(DataOutput dout) throws IOException {
106 dout.writeByte(mTag);
107 }
108 }