1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
<!DOCTYPE html>
<html><head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="../logi/reset.css" />
<link rel="stylesheet" type="text/css" href="features.css" />
<link rel="shortcut icon" href="../favicon.ico" type="image/x-icon" />
<meta name="description" content="Spice up your java" />
<title>@Getter and @Setter</title>
</head><body><div id="pepper">
<div class="minimumHeight"></div>
<div class="meat">
<div class="header"><a href="../index.html">Project Lombok</a></div>
<h1>@Getter and @Setter</h1>
<div class="byline">Never write <code>public int getFoo() {return foo;}</code> again.</div>
<div class="overview">
<h3>Overview</h3>
<p>
You can annotate any field with <code>@Getter</code> and/or <code>@Setter</code>, to let lombok generate the default getter/setter automatically.<br />
A default getter simply returns the field, and is named <code>getFoo</code> if the field is called <code>foo</code> (or <code>isFoo</code> if the field's type is <code>boolean</code>). A default setter is named <code>setFoo</code> if the field is called <code>foo</code>, returns <code>void</code>, and takes 1 parameter of the same type as the field. It simply sets the field to this value.
</p><p>
The generated getter/setter method will be <code>public</code> unless you explicitly specify an <code>AccessLevel</code>, as shown in the example below. Legal access levels are <code>PUBLIC</code>, <code>PROTECTED</code>, <code>PACKAGE</code>, and <code>PRIVATE</code>.
</p><p>
You can also put a <code>@Getter</code> and/or <code>@Setter</code> annotation on a class. In that case, it's as if you annotate all the non-static fields in that class with the annotation.
</p><p>
You can always manually disable getter/setter generation for any field by using the special <code>AccessLevel.NONE</code> access level. This lets you override the behaviour of a <code>@Getter</code>, <code>@Setter</code> or <code>@Data</code> annotation on a class.
</p><p>
To put annotations on the generated method, you can use <code>onMethod=@__({@AnnotationsHere})</code>; to put annotations on the only parameter of a generated setter method, you can use <code>onParam=@__({@AnnotationsHere})</code>. Be careful though! This is an experimental feature. For more details see the documentation on the <a href="experimental/onX.html">onX</a> feature.
</p><p>
<em>NEW in lombok v1.12.0:</em> javadoc on the field will now be copied to generated getters and setters. Normally, all text is copied, and <code>@return</code> is <em>moved</em> to the getter, whilst <code>@param</code> lines are <em>moved</em> to the setter. Moved means: Deleted from the field's javadoc. It is also possible to define unique text for each getter/setter. To do that, you create a 'section' named <code>GETTER</code> and/or <code>SETTER</code>. A section is a line in your javadoc containing 2 or more dashes, then the text 'GETTER' or 'SETTER', followed by 2 or more dashes, and nothing else on the line. If you use sections, <code>@return</code> and <code>@param</code> stripping for that section is no longer done (move the <code>@return</code> or <code>@param</code> line into the section).
</p>
</div>
<div class="snippets">
<div class="pre">
<h3>With Lombok</h3>
<div class="snippet">@HTML_PRE@</div>
</div>
<div class="sep"></div>
<div class="post">
<h3>Vanilla Java</h3>
<div class="snippet">@HTML_POST@</div>
</div>
</div>
<div style="clear: left;"></div>
<div class="overview confKeys">
<h3>Supported configuration keys:</h3>
<dl>
<dt><code>lombok.accessors.chain</code> = [<code>true</code> | <code>false</code>] (default: false)</dt>
<dd>If set to <code>true</code>, generated setters will return <code>this</code> (instead of <code>void</code>). An explicitly configured <code>chain</code> parameter of an <a href="experimental/Accessors.html"><code>@Accessors</code></a> annotation takes precedence over this setting.</dd>
<dt><code>lombok.accessors.fluent</code> = [<code>true</code> | <code>false</code>] (default: false)</dt>
<dd>If set to <code>true</code>, generated getters and setters will not be prefixed with the bean-standard '<code>get</code>, <code>is</code> or <code>set</code>; instead, the methods will use the same name as the field (minus prefixes). An explicitly configured <code>chain</code> parameter of an <a href="experimental/Accessors.html"><code>@Accessors</code></a> annotation takes precedence over this setting.</dd>
<dt><code>lombok.accessors.prefix</code> += <em>a field prefix</em> (default: empty list)</dt>
<dd>This is a list property; entries can be added with the <code>+=</code> operator. Inherited prefixes from parent config files can be removed with the <code>-=</code> operator. Lombok will strip any matching field prefix from the name of a field in order to determine the name of the getter/setter to generate. For example, if <code>m</code> is one of the prefixes listed in this setting, then a field named <code>mFoobar</code> will result in a getter named <code>getFoobar()</code>, not <code>getMFoobar()</code>. An explicitly configured <code>prefix</code> parameter of an <a href="experimental/Accessors.html"><code>@Accessors</code></a> annotation takes precedence over this setting.</dd>
<dt><code>lombok.getter.noIsPrefix</code> = [<code>true</code> | <code>false</code>] (default: false)</dt>
<dd>If set to <code>true</code>, getters generated for <code>boolean</code> fields will use the <code>get</code> prefix instead of the default<code>is</code> prefix, and any generated code that calls getters, such as <code>@ToString</code>, will also use <code>get</code> instead of <code>is</code>
<dt><code>lombok.setter.flagUsage</code> = [<code>warning</code> | <code>error</code>] (default: not set)</dt>
<dd>Lombok will flag any usage of <code>@Setter</code> as a warning or error if configured.</dd>
<dt><code>lombok.getter.flagUsage</code> = [<code>warning</code> | <code>error</code>] (default: not set)</dt>
<dd>Lombok will flag any usage of <code>@Getter</code> as a warning or error if configured.</dd>
</dl>
</div>
<div class="overview">
<h3>Small print</h3><div class="smallprint">
<p>
For generating the method names, the first character of the field, if it is a lowercase character, is title-cased, otherwise, it is left unmodified. Then, get/set/is is prefixed.
</p><p>
No method is generated if any method already exists with the same name (case insensitive) and same parameter count. For example, <code>getFoo()</code> will not be generated if there's already a method <code>getFoo(String... x)</code> even though it is technically possible to make the method. This caveat exists to prevent confusion. If the generation of a method is skipped for this reason, a warning is emitted instead. Varargs count as 0 to N parameters. You can mark any method with <code>@lombok.experimental.Tolerate</code> to hide them from lombok.
</p><p>
For <code>boolean</code> fields that start with <code>is</code> immediately followed by a title-case letter, nothing is prefixed to generate the getter name.
</p><p>
Any variation on <code>boolean</code> will <em>not</em> result in using the <code>is</code> prefix instead of the <code>get</code> prefix; for example,
returning <code>java.lang.Boolean</code> results in a <code>get</code> prefix, not an <code>is</code> prefix.
</p><p>
Any annotations named <code>@NonNull</code> (case insensitive) on the field are interpreted as: This field must not ever hold
<em>null</em>. Therefore, these annotations result in an explicit null check in the generated setter. Also, these
annotations (as well as any annotation named <code>@Nullable</code> or <code>@CheckForNull</code>) are copied to setter parameter and getter method.
</p><p>
You can annotate a class with a <code>@Getter</code> or <code>@Setter</code> annotation. Doing so is equivalent to annotating all non-static fields
in that class with that annotation. <code>@Getter</code>/<code>@Setter</code> annotations on fields take precedence over the ones on classes.
</p><p>
Using the <code>AccessLevel.NONE</code> access level simply generates nothing. It's useful only in combination with
<a href="Data.html"><code>@Data</code></a> or a class-wide <code>@Getter</code> or <code>@Setter</code>.
</p><p>
<code>@Getter</code> can also be used on enums. <code>@Setter</code> can't, not for a technical reason, but
for a pragmatic one: Setters on enums are an extremely bad idea.
</p>
</div>
</div>
<div class="footer">
<a href="index.html">Back to features</a> | <a href="Cleanup.html">Previous feature (@Cleanup)</a> | <a href="ToString.html">Next feature (@ToString)</a><br />
<a href="../credits.html" class="creditsLink">credits</a> | <span class="copyright">Copyright © 2009-2015 The Project Lombok Authors, licensed under the <a href="http://www.opensource.org/licenses/mit-license.php">MIT license</a>.</span>
</div>
<div style="clear: both;"></div>
</div>
</div>
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
try {
var pageTracker = _gat._getTracker("UA-9884254-1");
pageTracker._trackPageview();
} catch(err) {}
</script>
</body></html>
|
