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- <title>EXPERIMENTAL – @Accessors</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>@Accessors</h1>
- <div class="byline">A more fluent API for getters and setters.</div>
- <div class="since">
- <h3>Since</h3>
- <p>
- @Accessors was introduced as experimental feature in lombok v0.11.0.
- </p>
- </div>
- <div class="experimental">
- <h3>Experimental</h3>
- <p>
- Experimental because:
- <ul>
- <li>We may want to roll these features into a more complete property support concept.</li>
- <li>New feature - community feedback requested.</li>
- </ul>
- Current status: <em>positive</em> - Currently we feel this feature may move out of experimental status with no or minor changes soon.
- </div>
- <div class="overview">
- <h3>Overview</h3>
- <p>
- The <code>@Accessors</code> annotation is used to configure how lombok generates and looks for getters and setters.
- </p><p>
- By default, lombok follows the <em>bean specification</em> for getters and setters: The getter for a field named <code>pepper</code>
- is <code>getPepper</code> for example. However, some might like to break with the <em>bean specification</em> in order to end up with
- nicer looking APIs. <code>@Accessors</code> lets you do this.
- </p><p>
- Some programmers like to use a prefix for their fields, i.e. they write <code>fPepper</code> instead of <code>pepper</code>.
- We <em>strongly</em> discourage doing this, as you can't unit test the validity of your prefixes, and refactor scripts may turn fields
- into local variables or method names. Furthermore, your tools (such as your editor) can take care of rendering the identifier in a
- certain way if you want this information to be instantly visible. Nevertheless, you can list the prefixes that your project uses via
- <code>@Accessors</code> as well.
- </p><p>
- <code>@Accessors</code> therefore has 3 options:<ul>
- <li><code>fluent</code> - A boolean. If <em>true</em>, the getter for <code>pepper</code> is just <code>pepper()</code>, and the
- setter is <code>pepper(T newValue)</code>. Furthermore, unless specified, <code>chain</code> defaults to <em>true</em>.<br />
- Default: <em>false</em>.</li>
- <li><code>chain</code> - A boolean. If <em>true</em>, generated setters return <code>this</code> instead of <code>void</code>.<br />
- Default: <em>false</em>, unless <code>fluent=true</code>, then Default: <em>true</em>.</li>
- <li><code>prefix</code> - A list of strings. If present, fields must be prefixed with any of these prefixes. Each field name is
- compared to each prefix in the list in turn, and if a match is found, the prefix is stripped out to create the base name for
- the field. It is legal to include an empty string in the list, which will always match. For characters which are letters, the
- character following the prefix must not be a lowercase letter, i.e. <code>pepper</code> is not a match even to prefix <code>p</code>,
- but <code>pEpper</code> would be (and would mean the base name of this field is <code>epper</code>).</li>
- </p><p>
- The <code>@Accessors</code> annotation is legal on types and fields; the annotation that applies is the one on the field if present,
- otherwise the one on the class. When a <code>@Accessors</code> annotation on a field is present, any <code>@Accessors</code> annotation
- also present on that field's type is ignored.
- </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>, any class that either doesn't have an <code>@Accessors</code> annotation, or it does, but that annotation does not have an explicit value for the <code>chain</code> parameter, will act as if <code>@Accessors(chain = true)</code> is present.</dd>
- <dt><code>lombok.accessors.fluent</code> = [<code>true</code> | <code>false</code>] (default: false)</dt>
- <dd>If set to <code>true</code>, any class that either doesn't have an <code>@Accessors</code> annotation, or it does, but that annotation does not have an explicit value for the <code>fluent</code> parameter, will act as if <code>@Accessors(fluent = true)</code> is present.</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. Any class that either doesn't have an <code>@Accessors</code> annotation, or it does, but that annotation does not have an explicit value for the <code>prefix</code> parameter, will act as if <code>@Accessors(prefix = {<em>prefixes listed in configuration</em>})</code> is present.</dd>
- <dt><code>lombok.accessors.flagUsage</code> = [<code>warning</code> | <code>error</code>] (default: not set)</dt>
- <dd>Lombok will flag any usage of <code>@Accessors</code> as a warning or error if configured.</dd>
- </dl>
- </div>
- <div class="overview">
- <h3>Small print</h3><div class="smallprint">
- <p>
- The nearest <code>@Accessors</code> annotation is also used for the various methods in lombok that look for getters, such as
- <code>@EqualsAndHashCode</code>.
- </p><p>
- If a prefix list is provided and a field does not start with one of them, that field is skipped entirely by lombok, and
- a warning will be generated.
- </p>
- </div>
- </div>
- <div class="footer">
- <a href="index.html">Back to experimental features</a> | <a href="var.html">Previous feature (var)</a> | <a href="ExtensionMethod.html">Next feature (@ExtensionMethod)</a><br />
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