1
|
<!--
|
2
|
* utilities-classes.html
|
3
|
*
|
4
|
* Authors: Michael Daigle
|
5
|
* Copyright: 2009 Regents of the University of California and the
|
6
|
* National Center for Ecological Analysis and Synthesis
|
7
|
* For Details: http://www.nceas.ucsb.edu/
|
8
|
* Created: 2009 January 19
|
9
|
* Version:
|
10
|
* File Info: '$ '
|
11
|
*
|
12
|
*
|
13
|
-->
|
14
|
<html>
|
15
|
<head>
|
16
|
<title>Metacat Utilities Classes</title>
|
17
|
<!-- unfortunately, we have to look for the common css file in the
|
18
|
user docs directory. This is because the user docs deploy to
|
19
|
the top level of the metacat docs on the knb web server -->
|
20
|
<link rel="stylesheet" type="text/css" href="../user/common.css">
|
21
|
<link rel="stylesheet" type="text/css" href="./default.css">
|
22
|
</head>
|
23
|
|
24
|
<body>
|
25
|
<table class="tabledefault" width="100%">
|
26
|
<tr>
|
27
|
<td rowspan="2"><img src="./images/KNBLogo.gif"></td>
|
28
|
<td colspan="7"><div class="title">KNB Software Development Guide: Metacat Utilities Classes</div></td>
|
29
|
</tr>
|
30
|
<tr>
|
31
|
<td><a href="/" class="toollink"> KNB Home </a></td>
|
32
|
<td><a href="/data.html" class="toollink"> Data </a></td>
|
33
|
<td><a href="/people.html" class="toollink"> People </a></td>
|
34
|
<td><a href="/informatics" class="toollink"> Informatics </a></td>
|
35
|
<td><a href="/biodiversity" class="toollink"> Biocomplexity </a></td>
|
36
|
<td><a href="/education" class="toollink"> Education </a></td>
|
37
|
<td><a href="/software" class="toollink"> Software </a></td>
|
38
|
</tr>
|
39
|
</table>
|
40
|
<br>
|
41
|
|
42
|
<table width="100%">
|
43
|
<tr>
|
44
|
<td class="tablehead" colspan="2"><p class="label">Metacat Utilities Classes</p></td>
|
45
|
<td class="tablehead" colspan="2" align="right">
|
46
|
<a href="service-base.html">Back</a> | <a href="./index.html">Home</a> |
|
47
|
<!-- a href="add next file here when one exists" -->Next<!-- /a -->
|
48
|
</td>
|
49
|
</tr>
|
50
|
</table>
|
51
|
|
52
|
<div class="header1">Table of Contents</div>
|
53
|
<div class="toc">
|
54
|
<div class="toc1"><a href="#Overview">Overview</a></div>
|
55
|
</div>
|
56
|
|
57
|
<a name="Overview"></a><div class="header1">UtiltiesOverview</div>
|
58
|
<p>Metacat contains its own utilities classes (as opposed to the utilities classes
|
59
|
available in the generic utilities module). These utilities classes provide services
|
60
|
that are specific to Metacat. Some of the properties that typify a utility are:</p>
|
61
|
|
62
|
<ul>
|
63
|
<li>Static methods - all methods are called statically.</li>
|
64
|
<li>No state - there are no state variables in a utility.</li>
|
65
|
<li>Return UtilException on error - this should be the only checked exception
|
66
|
that gets thrown</li>
|
67
|
</ul>
|
68
|
|
69
|
<p/> If state becomes an issue, you may want to use a service class to provide
|
70
|
the functionality you need. See the
|
71
|
<a href="./service-base.html">Metacat Service Based Architecture page</a> for more
|
72
|
information on services.</p>
|
73
|
|
74
|
<br>
|
75
|
<a href="service-base.html">Back</a> | <a href="./index.html">Home</a> |
|
76
|
<!-- a href="add next file here when one exists" -->Next<!-- /a -->
|
77
|
</ul>
|
78
|
|
79
|
</body>
|
80
|
</html>
|