<span style="color:#961a65">public</span> <T <span style="color:#961a65">extends</span> FactoryManaged> T get(Class<T> klass) throws Error ?<br><br clear="all">Garami Gábor<br>E-mail: <a href="mailto:gabor.garami@hron.me" target="_blank">gabor.garami@hron.me</a><br>
Tel: +36 20 235 9621<br>MSN: <a href="mailto:hrgy@vipmail.hu" target="_blank">hrgy@vipmail.hu</a><br>Skype: hron84<br><br>
<br><br><div class="gmail_quote">2012/6/8 Peter Verhas <span dir="ltr"><<a href="mailto:peter@verhas.com" target="_blank">peter@verhas.com</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word"><div class="im"><div><br></div><br><div><div>>On 2012.06.08., at 12:01, Vig, Balázs wrote:</div></div>>Nem értem, miért zárod ki az interfészeket és absztrakt osztályokat. Nekem még nem sikerült ilyenekkel eljárást hívnom --> minden metódus implementálva lesz, mire hozzád eljut.<div>
<br></div></div><div>Pont fordítva: Csak interface-t szeretnék megengedni.<div><br></div><div>Rá akarom szorítani azt aki használja a factory-t, hogy ne konkrét osztály instance-ot kérjen, hanem interface megvalósítást. Hogy az milyen osztályból lesz létrehozva, az a factory dolga.</div>
<div><br></div><div>Most ez az interface a javaslatok alapján:</div><div><br></div><div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(150,26,101)">
public<span style="color:#000000"> </span>interface<span style="color:#000000"> Factory {</span></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px">
<br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
<span style="color:#961a65">public</span> <T <span style="color:#961a65">extends</span> FactoryManaged> <span style="color:#961a65">void</span> create(Class<T> interf4ce,</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
Class<? <span style="color:#961a65">extends</span> T> cl4ss);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px">
<br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">public</span> <T <span style="color:#961a65">extends</span> FactoryManaged> T get(Class<T> klass);</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
<span style="color:#961a65">public</span> <span style="color:#961a65">void</span> clean();</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div></div><div><br></div><div><br></div><div>(a clean csak kipucolja a factory-t, generics szempontból érdektelen).</div><div><br></div><div>Van egy abstract osztály, ami implementálja ezt az interfészt:</div><div><br>
</div><div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"><span style="color:#961a65">public</span> <span style="color:#961a65">abstract</span> <span style="color:#961a65">class</span> AbstractFactory <span style="color:#961a65">implements</span> Factory {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(119,119,119)">
<span style="color:#000000"> </span>@Override</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">public</span> <T <span style="color:#961a65">extends</span> FactoryManaged> <span style="color:#961a65">void</span> create(Class<T> interf4ce,</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> Class<? <span style="color:#961a65">extends</span> T> klass) {</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
assertInterface(interf4ce);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> assertImplements(interf4ce, klass);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
assertPattern(klass);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">try</span> {</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
Constructor<? <span style="color:#961a65">extends</span> T> constructor = klass.getDeclaredConstructor();</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
constructor.setAccessible(<span style="color:#961a65">true</span>);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> T object = (T) constructor.newInstance();</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> set(interf4ce, object);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
} <span style="color:#961a65">catch</span> (Exception e) {</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">throw</span> <span style="color:#961a65">new</span> BasicInterpreterInternalError(<span style="color:#3b3df5">"Can not instantiate "</span> + klass);</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> }</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px">
// runtime ellenőrzések kiszedve</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">protected</span> <span style="color:#961a65">void</span> assertPattern(Class<? <span style="color:#961a65">extends</span> FactoryManaged> klass) {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">...</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
<span style="color:#961a65">protected</span> <span style="color:#961a65">void</span> assertImplements(Class<? <span style="color:#961a65">extends</span> FactoryManaged> interf4ce,</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
...</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> }</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px">
<br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">protected</span> <span style="color:#961a65">void</span> assertInterface(Class<? <span style="color:#961a65">extends</span> FactoryManaged> klass) {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">...</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
<span style="color:#961a65">abstract</span> <T <span style="color:#961a65">extends</span> FactoryManaged> <span style="color:#961a65">void</span> set(Class<T> interf4ce,</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
T object);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div></div><div><br></div><div>és van egy thread local konkrét osztály:</div><div><br></div><div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
<span style="color:#961a65">public</span> <span style="color:#961a65">class</span> ThreadLocalFactory <span style="color:#961a65">extends</span> AbstractFactory {</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px">
<br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">private</span> <span style="color:#961a65">static</span> Map<Class<? <span style="color:#961a65">extends</span> FactoryManaged>, FactoryManaged> newMap() {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">return</span> <span style="color:#961a65">new</span> HashMap<Class<? <span style="color:#961a65">extends</span> FactoryManaged>, FactoryManaged>();</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> }</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px">
<br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">private</span> <span style="color:#961a65">static</span> ThreadLocal<Map<Class<? <span style="color:#961a65">extends</span> FactoryManaged>, FactoryManaged>> <span style="color:#032fc3">analyzerMap</span> = <span style="color:#961a65">new</span> ThreadLocal<Map<Class<? <span style="color:#961a65">extends</span> FactoryManaged>, FactoryManaged>>() {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(119,119,119)">
<span style="color:#000000"> </span>@Override</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">protected</span> Map<Class<? <span style="color:#961a65">extends</span> FactoryManaged>, FactoryManaged> initialValue() {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">return</span> newMap();</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
};</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(119,119,119)">
<span style="color:#000000"> </span>@Override</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">public</span> <span style="color:#961a65">void</span> clean() {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#032fc3">analyzerMap</span>.set(newMap());</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
<span style="color:#4d78c5">/**</span></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(77,120,197)"> * This method is used by the {@see AbstractFactory} to store created</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(77,120,197)"> * objects.</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(77,120,197)">
*/</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <T <span style="color:#961a65">extends</span> FactoryManaged> <span style="color:#961a65">void</span> set(Class<T> klass, T analyzer) {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#032fc3">analyzerMap</span>.get().put(klass, analyzer);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(119,119,119)">
<span style="color:#000000"> </span>@SuppressWarnings<span style="color:#000000">(</span><span style="color:#3b3df5">"unchecked"</span><span style="color:#000000">)</span></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(119,119,119)">
<span style="color:#000000"> </span>@Override</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> <span style="color:#961a65">public</span> <T <span style="color:#961a65">extends</span> FactoryManaged> T get(Class<T> klass) {</div>
<div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco"> assertInterface(klass);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;color:rgb(72,144,117)">
<span style="color:#000000"> </span>// <span style="color:#8fb0c8">TODO</span> how to alter it to avoid this unchecked cast</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
<span style="color:#961a65">return</span> (T) <span style="color:#032fc3">analyzerMap</span>.get().get(klass);</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco;min-height:15px"><br></div><div style="margin-top:0px;margin-right:0px;margin-bottom:0px;margin-left:0px;font:normal normal normal 11px/normal Monaco">
}</div></div><div><br></div><div>Most már csak az a kérdés, hogy hogyan lenne korrekt, hogy a <span style="color:rgb(119,119,119);font-family:Monaco;font-size:11px">@SuppressWarnings</span><span style="color:rgb(119,119,119);font-family:Monaco;font-size:11px"><span style="color:rgb(0,0,0)">(</span></span><span style="color:rgb(119,119,119);font-family:Monaco;font-size:11px"><span style="color:rgb(59,61,245)">"unchecked"</span></span><span style="color:rgb(119,119,119);font-family:Monaco;font-size:11px"><span style="color:rgb(0,0,0)">) </span></span>ne legyen szükséges. Amiket kezel azoknak van interface-ük, és minden ilyen interface extends FactoryManaged. Ami egyébként teljesen üres. Valamint minden osztálynak pontosan egy private vagy protected vagy default láthatóságú, de semmiképpen sem publikus default konstruktora van, és ezt most runtime ellenőrzi, és ha nem stimmel, akkor egy saját X extends Error()-t dob. Köszönöm a többi javaslatot is, amik nem voltak relevánsak a konkrét esetben, mert hasznosak voltak.</div>
<div class="im"><div><br><div>
<div style="word-wrap:break-word;font-family:Helvetica"><div style="word-wrap:break-word"><div><span style="color:rgb(136,136,136)">--</span><span style="color:rgb(136,136,136)"><br></span><span style="color:rgb(136,136,136)">Verhás Péter</span><span style="color:rgb(136,136,136)"><br>
</span><span style="color:rgb(136,136,136)"></span><span style="color:rgb(136,136,136)"><a href="mailto:peter@verhas.com" target="_blank">peter@verhas.com</a></span><span style="color:rgb(136,136,136)"><br></span><span style="color:rgb(136,136,136)"><a href="tel:%2B36%2830%299306805" value="+36309306805" target="_blank">+36(30)9306805</a></span><span style="color:rgb(136,136,136)"><br>
</span><span style="color:rgb(136,136,136)">skype: verhas</span></div></div><br></div><br></div><br><br></div></div></div></div><br>_______________________________________________<br>
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