166 lines
18 KiB
HTML
Vendored
166 lines
18 KiB
HTML
Vendored
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<a href="pypat-module.html">Package pypat</a> ::
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<a href="pypat.structural-module.html">Package structural</a> ::
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Module flyweight
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<h1 class="epydoc">Source Code for <a href="pypat.structural.flyweight-module.html">Module pypat.structural.flyweight</a></h1>
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<pre class="py-src">
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<a name="FlyweightMeta"></a><div id="FlyweightMeta-def"><a name="L1"></a><tt class="py-lineno"> 1</tt> <a class="py-toggle" href="#" id="FlyweightMeta-toggle" onclick="return toggle('FlyweightMeta');">-</a><tt class="py-line"><tt class="py-keyword">class</tt> <a class="py-def-name" href="pypat.structural.flyweight.FlyweightMeta-class.html">FlyweightMeta</a><tt class="py-op">(</tt><tt class="py-base-class">type</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
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</div><div id="FlyweightMeta-collapsed" style="display:none;" pad="++" indent="++++"></div><div id="FlyweightMeta-expanded"><a name="L2"></a><tt class="py-lineno"> 2</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt>
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<a name="L3"></a><tt class="py-lineno"> 3</tt> <tt class="py-line"><tt class="py-docstring"> Flyweight meta class as part of the Flyweight design pattern.</tt> </tt>
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<a name="L4"></a><tt class="py-lineno"> 4</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt>
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<a name="L5"></a><tt class="py-lineno"> 5</tt> <tt class="py-line"><tt class="py-docstring"> - External Usage Documentation: U{https://github.com/tylerlaberge/PyPatterns/wiki/Structural-Pattern-Usage}</tt> </tt>
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<a name="L6"></a><tt class="py-lineno"> 6</tt> <tt class="py-line"><tt class="py-docstring"> - External Flyweight Pattern documentation: U{https://en.wikipedia.org/wiki/Flyweight_pattern}</tt> </tt>
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<a name="L7"></a><tt class="py-lineno"> 7</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt>
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<a name="FlyweightMeta.__new__"></a><div id="FlyweightMeta.__new__-def"><a name="L8"></a><tt class="py-lineno"> 8</tt> <a class="py-toggle" href="#" id="FlyweightMeta.__new__-toggle" onclick="return toggle('FlyweightMeta.__new__');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pypat.structural.flyweight.FlyweightMeta-class.html#__new__">__new__</a><tt class="py-op">(</tt><tt class="py-param">mcs</tt><tt class="py-op">,</tt> <tt class="py-param">name</tt><tt class="py-op">,</tt> <tt class="py-param">bases</tt><tt class="py-op">,</tt> <tt class="py-param">attrs</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
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</div><div id="FlyweightMeta.__new__-collapsed" style="display:none;" pad="++" indent="++++++++"></div><div id="FlyweightMeta.__new__-expanded"><a name="L9"></a><tt class="py-lineno"> 9</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt>
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<a name="L10"></a><tt class="py-lineno">10</tt> <tt class="py-line"><tt class="py-docstring"> Override class construction to add 'pool' attribute to classes dict.</tt> </tt>
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<a name="L11"></a><tt class="py-lineno">11</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt>
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<a name="L12"></a><tt class="py-lineno">12</tt> <tt class="py-line"><tt class="py-docstring"> @param name: The name of the class.</tt> </tt>
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<a name="L13"></a><tt class="py-lineno">13</tt> <tt class="py-line"><tt class="py-docstring"> @param bases: Base classes of the class.</tt> </tt>
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<a name="L14"></a><tt class="py-lineno">14</tt> <tt class="py-line"><tt class="py-docstring"> @param attrs: Attributes of the class.</tt> </tt>
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<a name="L15"></a><tt class="py-lineno">15</tt> <tt class="py-line"><tt class="py-docstring"> @return: A new Class.</tt> </tt>
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<a name="L16"></a><tt class="py-lineno">16</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt>
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<a name="L17"></a><tt class="py-lineno">17</tt> <tt class="py-line"> <tt class="py-name">attrs</tt><tt class="py-op">[</tt><tt class="py-string">'pool'</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">dict</tt><tt class="py-op">(</tt><tt class="py-op">)</tt> </tt>
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<a name="L18"></a><tt class="py-lineno">18</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">super</tt><tt class="py-op">(</tt><tt id="link-0" class="py-name" targets="Class pypat.structural.flyweight.FlyweightMeta=pypat.structural.flyweight.FlyweightMeta-class.html"><a title="pypat.structural.flyweight.FlyweightMeta" class="py-name" href="#" onclick="return doclink('link-0', 'FlyweightMeta', 'link-0');">FlyweightMeta</a></tt><tt class="py-op">,</tt> <tt class="py-name">mcs</tt><tt class="py-op">)</tt><tt class="py-op">.</tt><tt id="link-1" class="py-name" targets="Static Method pypat.structural.flyweight.FlyweightMeta.__new__()=pypat.structural.flyweight.FlyweightMeta-class.html#__new__"><a title="pypat.structural.flyweight.FlyweightMeta.__new__" class="py-name" href="#" onclick="return doclink('link-1', '__new__', 'link-1');">__new__</a></tt><tt class="py-op">(</tt><tt class="py-name">mcs</tt><tt class="py-op">,</tt> <tt class="py-name">name</tt><tt class="py-op">,</tt> <tt class="py-name">bases</tt><tt class="py-op">,</tt> <tt class="py-name">attrs</tt><tt class="py-op">)</tt> </tt>
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</div><a name="L19"></a><tt class="py-lineno">19</tt> <tt class="py-line"> </tt>
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<a name="L20"></a><tt class="py-lineno">20</tt> <tt class="py-line"> <tt class="py-decorator">@</tt><tt class="py-decorator">staticmethod</tt> </tt>
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<a name="FlyweightMeta._serialize"></a><div id="FlyweightMeta._serialize-def"><a name="L21"></a><tt class="py-lineno">21</tt> <a class="py-toggle" href="#" id="FlyweightMeta._serialize-toggle" onclick="return toggle('FlyweightMeta._serialize');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pypat.structural.flyweight.FlyweightMeta-class.html#_serialize">_serialize</a><tt class="py-op">(</tt><tt class="py-param">cls</tt><tt class="py-op">,</tt> <tt class="py-op">*</tt><tt class="py-param">args</tt><tt class="py-op">,</tt> <tt class="py-op">**</tt><tt class="py-param">kwargs</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
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</div><div id="FlyweightMeta._serialize-collapsed" style="display:none;" pad="++" indent="++++++++"></div><div id="FlyweightMeta._serialize-expanded"><a name="L22"></a><tt class="py-lineno">22</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt>
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<a name="L23"></a><tt class="py-lineno">23</tt> <tt class="py-line"><tt class="py-docstring"> Serialize arguments to a string representation.</tt> </tt>
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<a name="L24"></a><tt class="py-lineno">24</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt>
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<a name="L25"></a><tt class="py-lineno">25</tt> <tt class="py-line"> <tt class="py-name">serialized_args</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">arg</tt><tt class="py-op">)</tt> <tt class="py-keyword">for</tt> <tt class="py-name">arg</tt> <tt class="py-keyword">in</tt> <tt class="py-name">args</tt><tt class="py-op">]</tt> </tt>
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<a name="L26"></a><tt class="py-lineno">26</tt> <tt class="py-line"> <tt class="py-name">serialized_kwargs</tt> <tt class="py-op">=</tt> <tt class="py-op">[</tt><tt class="py-name">str</tt><tt class="py-op">(</tt><tt class="py-name">kwargs</tt><tt class="py-op">)</tt><tt class="py-op">,</tt> <tt class="py-name">cls</tt><tt class="py-op">.</tt><tt class="py-name">__name__</tt><tt class="py-op">]</tt> </tt>
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<a name="L27"></a><tt class="py-lineno">27</tt> <tt class="py-line"> </tt>
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<a name="L28"></a><tt class="py-lineno">28</tt> <tt class="py-line"> <tt class="py-name">serialized_args</tt><tt class="py-op">.</tt><tt class="py-name">extend</tt><tt class="py-op">(</tt><tt class="py-name">serialized_kwargs</tt><tt class="py-op">)</tt> </tt>
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<a name="L29"></a><tt class="py-lineno">29</tt> <tt class="py-line"> </tt>
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<a name="L30"></a><tt class="py-lineno">30</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-string">''</tt><tt class="py-op">.</tt><tt class="py-name">join</tt><tt class="py-op">(</tt><tt class="py-name">serialized_args</tt><tt class="py-op">)</tt> </tt>
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</div><a name="L31"></a><tt class="py-lineno">31</tt> <tt class="py-line"> </tt>
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<a name="FlyweightMeta.__call__"></a><div id="FlyweightMeta.__call__-def"><a name="L32"></a><tt class="py-lineno">32</tt> <a class="py-toggle" href="#" id="FlyweightMeta.__call__-toggle" onclick="return toggle('FlyweightMeta.__call__');">-</a><tt class="py-line"> <tt class="py-keyword">def</tt> <a class="py-def-name" href="pypat.structural.flyweight.FlyweightMeta-class.html#__call__">__call__</a><tt class="py-op">(</tt><tt class="py-param">cls</tt><tt class="py-op">,</tt> <tt class="py-op">*</tt><tt class="py-param">args</tt><tt class="py-op">,</tt> <tt class="py-op">**</tt><tt class="py-param">kwargs</tt><tt class="py-op">)</tt><tt class="py-op">:</tt> </tt>
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</div><div id="FlyweightMeta.__call__-collapsed" style="display:none;" pad="++" indent="++++++++"></div><div id="FlyweightMeta.__call__-expanded"><a name="L33"></a><tt class="py-lineno">33</tt> <tt class="py-line"> <tt class="py-docstring">"""</tt> </tt>
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<a name="L34"></a><tt class="py-lineno">34</tt> <tt class="py-line"><tt class="py-docstring"> Override call to use objects from a pool if identical parameters are used for object creation.</tt> </tt>
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<a name="L35"></a><tt class="py-lineno">35</tt> <tt class="py-line"><tt class="py-docstring"></tt> </tt>
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<a name="L36"></a><tt class="py-lineno">36</tt> <tt class="py-line"><tt class="py-docstring"> @param args: Arguments for class instantiation.</tt> </tt>
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<a name="L37"></a><tt class="py-lineno">37</tt> <tt class="py-line"><tt class="py-docstring"> @param kwargs: Keyword arguments for class instantiation.</tt> </tt>
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<a name="L38"></a><tt class="py-lineno">38</tt> <tt class="py-line"><tt class="py-docstring"> @return: A new instance of the class.</tt> </tt>
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<a name="L39"></a><tt class="py-lineno">39</tt> <tt class="py-line"><tt class="py-docstring"> """</tt> </tt>
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<a name="L40"></a><tt class="py-lineno">40</tt> <tt class="py-line"> <tt class="py-name">key</tt> <tt class="py-op">=</tt> <tt id="link-2" class="py-name"><a title="pypat.structural.flyweight.FlyweightMeta" class="py-name" href="#" onclick="return doclink('link-2', 'FlyweightMeta', 'link-0');">FlyweightMeta</a></tt><tt class="py-op">.</tt><tt id="link-3" class="py-name" targets="Static Method pypat.structural.flyweight.FlyweightMeta._serialize()=pypat.structural.flyweight.FlyweightMeta-class.html#_serialize"><a title="pypat.structural.flyweight.FlyweightMeta._serialize" class="py-name" href="#" onclick="return doclink('link-3', '_serialize', 'link-3');">_serialize</a></tt><tt class="py-op">(</tt><tt class="py-name">cls</tt><tt class="py-op">,</tt> <tt class="py-op">*</tt><tt class="py-name">args</tt><tt class="py-op">,</tt> <tt class="py-op">**</tt><tt class="py-name">kwargs</tt><tt class="py-op">)</tt> </tt>
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<a name="L41"></a><tt class="py-lineno">41</tt> <tt class="py-line"> <tt id="link-4" class="py-name" targets="Module pypat.creational.pool=pypat.creational.pool-module.html"><a title="pypat.creational.pool" class="py-name" href="#" onclick="return doclink('link-4', 'pool', 'link-4');">pool</a></tt> <tt class="py-op">=</tt> <tt class="py-name">getattr</tt><tt class="py-op">(</tt><tt class="py-name">cls</tt><tt class="py-op">,</tt> <tt class="py-string">'pool'</tt><tt class="py-op">,</tt> <tt class="py-op">{</tt><tt class="py-op">}</tt><tt class="py-op">)</tt> </tt>
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<a name="L42"></a><tt class="py-lineno">42</tt> <tt class="py-line"> </tt>
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<a name="L43"></a><tt class="py-lineno">43</tt> <tt class="py-line"> <tt class="py-name">instance</tt> <tt class="py-op">=</tt> <tt id="link-5" class="py-name"><a title="pypat.creational.pool" class="py-name" href="#" onclick="return doclink('link-5', 'pool', 'link-4');">pool</a></tt><tt class="py-op">.</tt><tt class="py-name">get</tt><tt class="py-op">(</tt><tt class="py-name">key</tt><tt class="py-op">)</tt> </tt>
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<a name="L44"></a><tt class="py-lineno">44</tt> <tt class="py-line"> <tt class="py-keyword">if</tt> <tt class="py-keyword">not</tt> <tt class="py-name">instance</tt><tt class="py-op">:</tt> </tt>
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<a name="L45"></a><tt class="py-lineno">45</tt> <tt class="py-line"> <tt class="py-name">instance</tt> <tt class="py-op">=</tt> <tt class="py-name">super</tt><tt class="py-op">(</tt><tt id="link-6" class="py-name"><a title="pypat.structural.flyweight.FlyweightMeta" class="py-name" href="#" onclick="return doclink('link-6', 'FlyweightMeta', 'link-0');">FlyweightMeta</a></tt><tt class="py-op">,</tt> <tt class="py-name">cls</tt><tt class="py-op">)</tt><tt class="py-op">.</tt><tt id="link-7" class="py-name" targets="Method pypat.behavioral.null.Null.__call__()=pypat.behavioral.null.Null-class.html#__call__,Method pypat.creational.singleton.Singleton.__call__()=pypat.creational.singleton.Singleton-class.html#__call__,Method pypat.structural.decorator.CallWrapper.__call__()=pypat.structural.decorator.CallWrapper-class.html#__call__,Method pypat.structural.decorator.Decorator.__call__()=pypat.structural.decorator.Decorator-class.html#__call__,Method pypat.structural.decorator.DecoratorComplex.__call__()=pypat.structural.decorator.DecoratorComplex-class.html#__call__,Method pypat.structural.flyweight.FlyweightMeta.__call__()=pypat.structural.flyweight.FlyweightMeta-class.html#__call__"><a title="pypat.behavioral.null.Null.__call__
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pypat.creational.singleton.Singleton.__call__
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pypat.structural.decorator.CallWrapper.__call__
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pypat.structural.decorator.Decorator.__call__
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pypat.structural.decorator.DecoratorComplex.__call__
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pypat.structural.flyweight.FlyweightMeta.__call__" class="py-name" href="#" onclick="return doclink('link-7', '__call__', 'link-7');">__call__</a></tt><tt class="py-op">(</tt><tt class="py-op">*</tt><tt class="py-name">args</tt><tt class="py-op">,</tt> <tt class="py-op">**</tt><tt class="py-name">kwargs</tt><tt class="py-op">)</tt> </tt>
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<a name="L46"></a><tt class="py-lineno">46</tt> <tt class="py-line"> <tt id="link-8" class="py-name"><a title="pypat.creational.pool" class="py-name" href="#" onclick="return doclink('link-8', 'pool', 'link-4');">pool</a></tt><tt class="py-op">[</tt><tt class="py-name">key</tt><tt class="py-op">]</tt> <tt class="py-op">=</tt> <tt class="py-name">instance</tt> </tt>
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<a name="L47"></a><tt class="py-lineno">47</tt> <tt class="py-line"> </tt>
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<a name="L48"></a><tt class="py-lineno">48</tt> <tt class="py-line"> <tt class="py-keyword">return</tt> <tt class="py-name">instance</tt> </tt>
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</div></div><a name="L49"></a><tt class="py-lineno">49</tt> <tt class="py-line"> </tt><script type="text/javascript">
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