1 |
|
|
2 |
|
|
3 |
|
|
4 |
|
|
5 |
|
|
6 |
|
|
7 |
|
|
8 |
|
|
9 |
|
|
10 |
|
|
11 |
|
|
12 |
|
|
13 |
|
|
14 |
|
|
15 |
|
package org.apache.tapestry.contrib.table.model.sql; |
16 |
|
|
17 |
|
import java.sql.ResultSet; |
18 |
|
import java.sql.SQLException; |
19 |
|
import java.util.Iterator; |
20 |
|
|
21 |
|
import org.apache.commons.logging.Log; |
22 |
|
import org.apache.commons.logging.LogFactory; |
23 |
|
|
24 |
|
|
25 |
|
|
26 |
|
|
27 |
|
public class ResultSetIterator implements Iterator |
28 |
|
{ |
29 |
|
|
30 |
0 |
private static final Log LOG = LogFactory.getLog(ResultSetIterator.class); |
31 |
|
|
32 |
|
private ResultSet m_objResultSet; |
33 |
|
private boolean m_bFetched; |
34 |
|
private boolean m_bAvailable; |
35 |
|
|
36 |
|
public ResultSetIterator(ResultSet objResultSet) |
37 |
0 |
{ |
38 |
0 |
m_objResultSet = objResultSet; |
39 |
0 |
m_bFetched = false; |
40 |
0 |
} |
41 |
|
|
42 |
|
|
43 |
|
|
44 |
|
|
45 |
|
public synchronized boolean hasNext() |
46 |
|
{ |
47 |
0 |
if (getResultSet() == null) return false; |
48 |
|
|
49 |
0 |
if (!m_bFetched) |
50 |
|
{ |
51 |
0 |
m_bFetched = true; |
52 |
|
|
53 |
|
try |
54 |
|
{ |
55 |
0 |
m_bAvailable = !getResultSet().isLast(); |
56 |
|
} |
57 |
0 |
catch (SQLException e) |
58 |
|
{ |
59 |
0 |
LOG.warn("SQLException while testing for end of the ResultSet", |
60 |
|
e); |
61 |
0 |
m_bAvailable = false; |
62 |
0 |
} |
63 |
|
|
64 |
0 |
if (!m_bAvailable) notifyEnd(); |
65 |
|
} |
66 |
|
|
67 |
0 |
return m_bAvailable; |
68 |
|
} |
69 |
|
|
70 |
|
|
71 |
|
|
72 |
|
|
73 |
|
public synchronized Object next() |
74 |
|
{ |
75 |
0 |
ResultSet objResultSet = getResultSet(); |
76 |
|
|
77 |
|
try |
78 |
|
{ |
79 |
0 |
if (!objResultSet.next()) return null; |
80 |
|
} |
81 |
0 |
catch (SQLException e) |
82 |
|
{ |
83 |
0 |
LOG.warn("SQLException while iterating over the ResultSet", e); |
84 |
0 |
return null; |
85 |
0 |
} |
86 |
|
|
87 |
0 |
m_bFetched = false; |
88 |
0 |
return objResultSet; |
89 |
|
} |
90 |
|
|
91 |
|
|
92 |
|
|
93 |
|
|
94 |
|
public void remove() |
95 |
|
{ |
96 |
|
try |
97 |
|
{ |
98 |
0 |
getResultSet().deleteRow(); |
99 |
|
} |
100 |
0 |
catch (SQLException e) |
101 |
|
{ |
102 |
0 |
LOG.error("Cannot delete record", e); |
103 |
0 |
} |
104 |
0 |
} |
105 |
|
|
106 |
|
|
107 |
|
|
108 |
|
|
109 |
|
|
110 |
|
|
111 |
|
public ResultSet getResultSet() |
112 |
|
{ |
113 |
0 |
return m_objResultSet; |
114 |
|
} |
115 |
|
|
116 |
|
protected void notifyEnd() |
117 |
|
{ |
118 |
0 |
} |
119 |
|
|
120 |
|
} |