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<td class="back"><a id="top"></a><a href="s4.7.d.html" rel="prev">&lt;&lt;&nbsp;&sect;4.7.(d)&nbsp;replace</a></td>
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<div class="breadcrumb"><a class="nav" href="s4.html" rel="section">&sect;4&nbsp;Callin Binding</a>&nbsp;&gt;&nbsp;<a class="nav" href="s4.7.html" rel="section">&sect;4.7&nbsp;Callin binding with static methods</a></div>
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<h4 class="subsect">&sect;4.7.(e)&nbsp;<span class="title">No overriding</span><a class="img" href="s4.7.e.html" title="PermaLink to (e)&nbsp;No overriding"><img style="vertical-align:text-top;margin-left:5px;" src="../images/permalink.png"
alt="" /></a></h4>
<p>Since static methods are not dynamically bound, <i>overriding</i> does not
apply in the normal semantics. Regarding callin bindings this has the
following consequences (assuming a role <code>RMid</code> played by
<code>BMid</code> plus its super-class <code>BSuper</code> and its sub-class
<code>BSub</code>.
</p>
<ol>
<li>If a static base method <code>BMid.m</code> is bound by a callin binding
this has no effect on any method <code>m</code> in <code>BSub</code>.
</li>
<li>If a callin binding mentions a method <code>m</code> which is not present
in <code>BMid</code> but resolves to a static method in <code>BSuper</code>
the binding only affects invocations as <code>BMid.m()</code> but not
<code>BSuper.m()</code>. If the latter call should be affected, too,
the callin binding must appear in a role class bound to <code>BSuper</code>,
not <code>BMid</code>.
</li>
<li>In order to bind two static base methods with equal signatures, one being
defined in a sub-class of the other one, two roles have to be defined
where one role refines the <code>playedBy</code> clause of the other role
(say: <code>public class RSub extends RMid playedBy BSub</code>).
Now each role may bind to the static base method accessible in its direct
base-class.
</li>
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<div class="breadcrumb"><a class="nav" href="s4.html" rel="section">&sect;4&nbsp;Callin Binding</a>&nbsp;&gt;&nbsp;<a class="nav" href="s4.7.html" rel="section">&sect;4.7&nbsp;Callin binding with static methods</a></div>
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OT/J version 1.3 &mdash; last modified: 2010-06-08
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