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<article id="content">
<header>
<h1 class="title">Module <code>Gnumed.pycommon.gmBorg</code></h1>
</header>
<section id="section-intro">
<p>A base class turning child classes into a Singleton.</p>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python"># -*- coding: utf-8 -*-
"""A base class turning child classes into a Singleton."""
__author__ = "Karsten.Hilbert@gmx.net"
__license__ = "GPL v2 or later"
#===================================================
class cBorg:
"""A generic Borg mixin for new-style classes.
- mixin this class with your class' ancestors to borg it
- there may be many _instances_ of this - PER CHILD CLASS - but they all share _state_
"""
_instances:dict = {}
def __new__(cls, *args, **kargs):
# look up subclass instance cache
if cBorg._instances.get(cls) is None:
#cBorg._instances[cls] = object.__new__(cls, *args, **kargs)
cBorg._instances[cls] = object.__new__(cls)
return cBorg._instances[cls]
#===================================================
if __name__ == '__main__':
import sys
if len(sys.argv) < 2:
sys.exit()
if sys.argv[1] != 'test':
sys.exit()
class A(cBorg):
pass
class B(cBorg):
pass
class C(cBorg):
def __init__(self, val='default'):
self.x = val
#===================================================
print("testing new-style classes borg")
a1 = A()
a2 = A()
a1.a = 5 # type: ignore
print(a1.a, "==", a2.a) # type: ignore
a3 = A()
print(a1.a, "==", a2.a, "==", a3.a) # type: ignore
b1 = B()
b1.a = 10 # type: ignore
print(b1.a) # type: ignore
print(a1.a) # type: ignore
b2 = B()
print(b2.a) # type: ignore
c1 = C(val = 'non-default')
print(c1.x)
c2 = C(val = 'non-default 2')
print(c2.x)
c3 = C()
print(c3.x)
#===================================================</code></pre>
</details>
</section>
<section>
</section>
<section>
</section>
<section>
</section>
<section>
<h2 class="section-title" id="header-classes">Classes</h2>
<dl>
<dt id="Gnumed.pycommon.gmBorg.cBorg"><code class="flex name class">
<span>class <span class="ident">cBorg</span></span>
<span>(</span><span>*args, **kargs)</span>
</code></dt>
<dd>
<div class="desc"><p>A generic Borg mixin for new-style classes.</p>
<ul>
<li>
<p>mixin this class with your class' ancestors to borg it</p>
</li>
<li>
<p>there may be many <em>instances</em> of this - PER CHILD CLASS - but they all share <em>state</em></p>
</li>
</ul></div>
<details class="source">
<summary>
<span>Expand source code</span>
</summary>
<pre><code class="python">class cBorg:
"""A generic Borg mixin for new-style classes.
- mixin this class with your class' ancestors to borg it
- there may be many _instances_ of this - PER CHILD CLASS - but they all share _state_
"""
_instances:dict = {}
def __new__(cls, *args, **kargs):
# look up subclass instance cache
if cBorg._instances.get(cls) is None:
#cBorg._instances[cls] = object.__new__(cls, *args, **kargs)
cBorg._instances[cls] = object.__new__(cls)
return cBorg._instances[cls]</code></pre>
</details>
<h3>Subclasses</h3>
<ul class="hlist">
<li><a title="Gnumed.business.gmForms.gmOOoConnector" href="gmForms.html#Gnumed.business.gmForms.gmOOoConnector">gmOOoConnector</a></li>
<li><a title="Gnumed.business.gmPerson.gmCurrentPatient" href="gmPerson.html#Gnumed.business.gmPerson.gmCurrentPatient">gmCurrentPatient</a></li>
<li><a title="Gnumed.business.gmPraxis.gmCurrentPraxisBranch" href="gmPraxis.html#Gnumed.business.gmPraxis.gmCurrentPraxisBranch">gmCurrentPraxisBranch</a></li>
<li><a title="Gnumed.business.gmStaff.gmCurrentProvider" href="gmStaff.html#Gnumed.business.gmStaff.gmCurrentProvider">gmCurrentProvider</a></li>
<li><a title="Gnumed.pycommon.gmBackendListener.gmBackendListener" href="gmBackendListener.html#Gnumed.pycommon.gmBackendListener.gmBackendListener">gmBackendListener</a></li>
<li><a title="Gnumed.pycommon.gmCfgINI.gmCfgData" href="gmCfgINI.html#Gnumed.pycommon.gmCfgINI.gmCfgData">gmCfgData</a></li>
<li><a title="Gnumed.pycommon.gmConnectionPool.gmConnectionPool" href="gmConnectionPool.html#Gnumed.pycommon.gmConnectionPool.gmConnectionPool">gmConnectionPool</a></li>
<li><a title="Gnumed.pycommon.gmTools.gmPaths" href="gmTools.html#Gnumed.pycommon.gmTools.gmPaths">gmPaths</a></li>
</ul>
</dd>
</dl>
</section>
</article>
<nav id="sidebar">
<h1>Index</h1>
<div class="toc">
<ul></ul>
</div>
<ul id="index">
<li><h3>Super-module</h3>
<ul>
<li><code><a title="Gnumed.pycommon" href="http://www.gnumed.de/downloads/docs/api/pycommon/index.html">Gnumed.pycommon</a></code></li>
</ul>
</li>
<li><h3><a href="gmBorg.html#header-classes">Classes</a></h3>
<ul>
<li>
<h4><code><a title="Gnumed.pycommon.gmBorg.cBorg" href="gmBorg.html#Gnumed.pycommon.gmBorg.cBorg">cBorg</a></code></h4>
</li>
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