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Java > Open Source Codes > smallsql > database > FileIndex


1 /*
2  * Created on 24.09.2006
3  */

4 package smallsql.database;
5
6 import java.io.*;
7
8
9 /**
10  * @author Volker Berlin
11  */

12 class FileIndex extends Index {
13
14 static public void main(String JavaDoc args[]) throws Exception JavaDoc{
15     File file = File.createTempFile("test", "idx");
16     RandomAccessFile raFile = new RandomAccessFile(file, "rw");
17     FileIndex index = new FileIndex(false, raFile);
18     Expressions expressions = new Expressions();
19     ExpressionValue value = new ExpressionValue();
20     expressions.add(value);
21     value.set( "150", SQLTokenizer.VARCHAR);
22     index.addValues(1, expressions);
23     value.set( "15", SQLTokenizer.VARCHAR);
24     index.addValues(2, expressions);
25     print(index,expressions);
26     index.save();
27 }
28
29 static void print(Index index, Expressions expressions){
30     IndexScrollStatus scroll = index.createScrollStatus(expressions);
31     long l;
32     while((l= scroll.getRowOffset(true)) >=0){
33         System.out.println(l);
34     }
35     System.out.println("============================");
36 }
37
38     
39     private final RandomAccessFile raFile;
40     
41     
42     FileIndex( boolean unique, RandomAccessFile raFile ) {
43         super(new FileIndexNode( unique, (char)-1, raFile));
44         this.raFile = raFile;
45     }
46     
47     
48     void save() throws Exception JavaDoc{
49         ((FileIndexNode)rootPage).save();
50     }
51
52 }
53
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