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Java > Open Source Codes > org > apache > poi > hssf > record > ProtectionRev4Record


1
2 /* ====================================================================
3    Copyright 2002-2004 Apache Software Foundation
4
5    Licensed under the Apache License, Version 2.0 (the "License");
6    you may not use this file except in compliance with the License.
7    You may obtain a copy of the License at
8
9        http://www.apache.org/licenses/LICENSE-2.0
10
11    Unless required by applicable law or agreed to in writing, software
12    distributed under the License is distributed on an "AS IS" BASIS,
13    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14    See the License for the specific language governing permissions and
15    limitations under the License.
16 ==================================================================== */
17         
18
19 package org.apache.poi.hssf.record;
20
21 import org.apache.poi.util.LittleEndian;
22
23 /**
24  * Title: Protection Revision 4 Record<P>
25  * Description: describes whether this is a protected shared/tracked workbook<P>
26  * ( HSSF does not support encryption because we don't feel like going to jail ) <P>
27  * REFERENCE: PG 373 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<P>
28  * @author Andrew C. Oliver (acoliver at apache dot org)
29  * @version 2.0-pre
30  */
31
32 public class ProtectionRev4Record
33     extends Record
34 {
35     public final static short sid = 0x1af;
36     private short field_1_protect;
37
38     public ProtectionRev4Record()
39     {
40     }
41
42     /**
43      * Constructs a ProtectionRev4 record and sets its fields appropriately.
44      *
45      * @param id id must be 0x1af or an exception will be throw upon validation
46      * @param size the size of the data area of the record
47      * @param data data of the record (should not contain sid/len)
48      */
49
50     public ProtectionRev4Record(short id, short size, byte [] data)
51     {
52         super(id, size, data);
53     }
54
55     /**
56      * Constructs a ProtectionRev4 record and sets its fields appropriately.
57      *
58      * @param id id must be 0x1af or an exception will be throw upon validation
59      * @param size the size of the data area of the record
60      * @param data data of the record (should not contain sid/len)
61      * @param offset of the data
62      */
63
64     public ProtectionRev4Record(short id, short size, byte [] data,
65                                 int offset)
66     {
67         super(id, size, data, offset);
68     }
69
70     protected void validateSid(short id)
71     {
72         if (id != sid)
73         {
74             throw new RecordFormatException("NOT A PROTECTION REV 4 RECORD");
75         }
76     }
77
78     protected void fillFields(byte [] data, short size, int offset)
79     {
80         field_1_protect = LittleEndian.getShort(data, 0 + offset);
81     }
82
83     /**
84      * set whether the this is protected shared/tracked workbook or not
85      * @param protect whether to protect the workbook or not
86      */
87
88     public void setProtect(boolean protect)
89     {
90         if (protect)
91         {
92             field_1_protect = 1;
93         }
94         else
95         {
96             field_1_protect = 0;
97         }
98     }
99
100     /**
101      * get whether the this is protected shared/tracked workbook or not
102      * @return whether to protect the workbook or not
103      */
104
105     public boolean getProtect()
106     {
107         return (field_1_protect == 1);
108     }
109
110     public String JavaDoc toString()
111     {
112         StringBuffer JavaDoc buffer = new StringBuffer JavaDoc();
113
114         buffer.append("[PROT4REV]\n");
115         buffer.append(" .protect = ").append(getProtect())
116             .append("\n");
117         buffer.append("[/PROT4REV]\n");
118         return buffer.toString();
119     }
120
121     public int serialize(int offset, byte [] data)
122     {
123         LittleEndian.putShort(data, 0 + offset, sid);
124         LittleEndian.putShort(data, 2 + offset,
125                               (( short ) 0x02)); // 2 bytes (6 total)
126 LittleEndian.putShort(data, 4 + offset, field_1_protect);
127         return getRecordSize();
128     }
129
130     public int getRecordSize()
131     {
132         return 6;
133     }
134
135     public short getSid()
136     {
137         return this.sid;
138     }
139 }
140
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