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1
4 package com.openedit.util;
5
6 import java.io.File  ;
7 import java.io.FileInputStream ;
8 import java.io.FileOutputStream ;
9 import java.io.IOException ;
10 import java.util.Properties ;
11
12 import com.openedit.OpenEditRuntimeException;
13
14 public class IntCounter
15 {
16 File fieldCounterFile;
17
18 public synchronized int incrementCount()
19 {
20 try
21 {
22 int i = getCustomerIdCounter();
23 i++;
24 saveCount(i);
25 return i;
26 } catch (IOException ex)
27 {
28 throw new OpenEditRuntimeException(ex);
29 }
30 }
31
32
35 protected void saveCount(int inCount) throws IOException
36 {
37 FileOutputStream out = new FileOutputStream (getCounterFile());
38 try
39 {
40 Properties fieldCustomerIdCounter = new Properties ();
41 fieldCustomerIdCounter.setProperty("currentCount",String.valueOf(inCount));
42 fieldCustomerIdCounter.store(out,"");
43 }
44 finally
45 {
46 out.close();
47 }
48 }
49
50 protected synchronized int getCustomerIdCounter() throws IOException , IllegalStateException
51 {
52 Properties fieldCustomerIdCounter = new Properties ();
53 if ( !getCounterFile().exists() )
54 {
55 saveCount(100);
56 }
57
58 FileInputStream in = new FileInputStream ( getCounterFile() );
59 try
60 {
61 fieldCustomerIdCounter.load( in );
62 }
63 finally
64 {
65 in.close();
66 }
67
68 String count = fieldCustomerIdCounter.getProperty( "currentCount" );
69 if ( count == null )
70 {
71 throw new IllegalStateException ( "Could not find valid ID counter " + getCounterFile() );
72 }
73
74 int i = Integer.parseInt( count );
75 return i;
76 }
77
78 public File getCounterFile()
79 {
80 return fieldCounterFile;
81 }
82
83 public void setCounterFile(File inCounterFile)
84 {
85 fieldCounterFile = inCounterFile;
86 }
87
88
89
90 }
91 |
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