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| <td class="back"><a id="top"></a><a href="s3.1.a.html" rel="prev"><< §3.1.(a) Prerequisite: Class binding</a></td> |
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| <td class="next"><a href="s3.1.c.html" rel="next">§3.1.(c) Kinds of method designators >></a></td> |
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| <div class="breadcrumb"><a class="nav" href="s3.html" rel="section">§3 Callout Binding</a> > <a class="nav" href="s3.1.html" rel="section">§3.1 Callout method binding</a></div> |
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| <h4 class="subsect">§3.1.(b) <span class="title">Definition</span><a class="img" href="s3.1.b.html" title="PermaLink to (b) Definition"><img style="vertical-align:text-top;margin-left:5px;" src="../images/permalink.png" |
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| <p>A callout binding maps an abstract role method ("expected method") |
| to a concrete base method ("provided method"). |
| It may appear within the role class at any place where feature |
| declarations are allowed. It is denoted by |
| |
| </p> |
| <div class="listing plain"><pre><i>expected_method_designator</i> <b>-></b> <i>provided_method_designator;</i></pre></div> |
| <p>The effect is that any call to the role method will be forwarded to the |
| associated base object using the provided base method. |
| |
| </p> |
| <h5 class="listing">Example code (Callout):</h5> |
| <div class="listing example frame"> |
| <table class="listing"> |
| <tr class="line odd"> |
| <td class="ln">1</td> |
| <td><pre><b>team</b> <b>class</b> Company {</pre></td> |
| </tr> |
| <tr class="line even"> |
| <td class="ln">2</td> |
| <td><pre> <b>public</b> <b>class</b> Employee <b>playedBy</b> Person {</pre></td> |
| </tr> |
| <tr class="line odd"> |
| <td class="ln">3</td> |
| <td><pre> <b>abstract</b> String getIdentification();</pre></td> |
| </tr> |
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| <td class="ln">4</td> |
| <td><pre> <span class="comment">// callout binding see below...</span></pre></td> |
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| <td class="ln">5</td> |
| <td><pre> }</pre></td> |
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| <td class="ln">6</td> |
| <td><pre>}</pre></td> |
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| <div class="breadcrumb"><a class="nav" href="s3.html" rel="section">§3 Callout Binding</a> > <a class="nav" href="s3.1.html" rel="section">§3.1 Callout method binding</a></div> |
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| width="88" /></a><address>© Stephan Herrmann, Christine Hundt, Marco Mosconi</address> |
| OT/J version 1.3 — last modified: 2010-05-18 |
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