1    
2    /* ====================================================================
3     * The Apache Software License, Version 1.1
4     *
5     * Copyright (c) 2002 The Apache Software Foundation.  All rights
6     * reserved.
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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
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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    *        Apache Software Foundation (http://www.apache.org/)."
24    *    Alternately, this acknowledgment may appear in the software itself,
25    *    if and wherever such third-party acknowledgments normally appear.
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27    * 4. The names "Apache" and "Apache Software Foundation" and
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32    * 5. Products derived from this software may not be called "Apache",
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50    * This software consists of voluntary contributions made by many
51    * individuals on behalf of the Apache Software Foundation.  For more
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54    */
55   
56   package org.apache.poi.hssf.record;
57   
58   import org.apache.poi.util.LittleEndian;
59   
60   /**
61    * Title: Interface Header Record<P>
62    * Description: Defines the beginning of Interface records (MMS)<P>
63    * REFERENCE:  PG 324 Microsoft Excel 97 Developer's Kit (ISBN: 1-57231-498-2)<P>
64    * @author Andrew C. Oliver (acoliver at apache dot org)
65    * @version 2.0-pre
66    */
67   
68   public class InterfaceHdrRecord
69       extends Record
70   {
71       public final static short sid = 0xe1;
72       private short             field_1_codepage;   // = 0;
73   
74       /**
75        * suggested (and probably correct) default
76        */
77   
78       public final static short CODEPAGE = ( short ) 0x4b0;
79   
80       public InterfaceHdrRecord()
81       {
82       }
83   
84       /**
85        * Constructs an Codepage record and sets its fields appropriately.
86        *
87        * @param id     id must be 0xe1 or an exception will be throw upon validation
88        * @param size  the size of the data area of the record
89        * @param data  data of the record (should not contain sid/len)
90        */
91   
92       public InterfaceHdrRecord(short id, short size, byte [] data)
93       {
94           super(id, size, data);
95       }
96   
97       /**
98        * Constructs an Codepage record and sets its fields appropriately.
99        *
100       * @param id     id must be 0xe1 or an exception will be throw upon validation
101       * @param size  the size of the data area of the record
102       * @param data  data of the record (should not contain sid/len)
103       * @param offset of the record's data
104       */
105  
106      public InterfaceHdrRecord(short id, short size, byte [] data, int offset)
107      {
108          super(id, size, data, offset);
109      }
110  
111      protected void validateSid(short id)
112      {
113          if (id != sid)
114          {
115              throw new RecordFormatException("NOT A INTERFACEHDR RECORD");
116          }
117      }
118  
119      protected void fillFields(byte [] data, short size, int offset)
120      {
121          field_1_codepage = LittleEndian.getShort(data, 0 + offset);
122      }
123  
124      /**
125       * set the codepage for the file
126       *
127       * @param cp - the codepage
128       * @see #CODEPAGE
129       */
130  
131      public void setCodepage(short cp)
132      {
133          field_1_codepage = cp;
134      }
135  
136      /**
137       * get the codepage for the file
138       *
139       * @return the codepage
140       * @see #CODEPAGE
141       */
142  
143      public short getCodepage()
144      {
145          return field_1_codepage;
146      }
147  
148      public String toString()
149      {
150          StringBuffer buffer = new StringBuffer();
151  
152          buffer.append("[INTERFACEHDR]\n");
153          buffer.append("    .codepage        = ")
154              .append(Integer.toHexString(getCodepage())).append("\n");
155          buffer.append("[/INTERFACEHDR]\n");
156          return buffer.toString();
157      }
158  
159      public int serialize(int offset, byte [] data)
160      {
161          LittleEndian.putShort(data, 0 + offset, sid);
162          LittleEndian.putShort(data, 2 + offset,
163                                (( short ) 0x02));   // 2 bytes (6 total)
164          LittleEndian.putShort(data, 4 + offset, getCodepage());
165          return getRecordSize();
166      }
167  
168      public int getRecordSize()
169      {
170          return 6;
171      }
172  
173      public short getSid()
174      {
175          return this.sid;
176      }
177  }
178