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<li class="toctree-l1"><a class="reference external" href="http://unidata.github.io/awips2/appendix/appendix-grid-parameters/">AWIPS Grid Parameters</a></li>
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<h1>Source code for awips.dataaccess</h1><div class="highlight"><pre>
<span></span><span class="c1">#</span>
<span class="c1"># __init__.py for awips.dataaccess package</span>
<span class="c1">#</span>
<span class="c1">#</span>
<span class="c1"># SOFTWARE HISTORY</span>
<span class="c1">#</span>
<span class="c1"># Date Ticket# Engineer Description</span>
<span class="c1"># ------------ ---------- ----------- --------------------------</span>
<span class="c1"># 12/10/12 njensen Initial Creation.</span>
<span class="c1"># Feb 14, 2013 1614 bsteffen refactor data access framework</span>
<span class="c1"># to use single request.</span>
<span class="c1"># Apr 09, 2013 1871 njensen Add doc strings</span>
<span class="c1"># Jun 03, 2013 2023 dgilling Add getAttributes to IData, add</span>
<span class="c1"># getLatLonGrids() to IGridData.</span>
<span class="c1"># Aug 01, 2016 2416 tgurney Add INotificationSubscriber</span>
<span class="c1"># and INotificationFilter</span>
<span class="c1">#</span>
<span class="c1">#</span>
<span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span>
<span class="s1">&#39;IData&#39;</span><span class="p">,</span>
<span class="s1">&#39;IDataRequest&#39;</span><span class="p">,</span>
<span class="s1">&#39;IGeometryData&#39;</span><span class="p">,</span>
<span class="s1">&#39;IGridData&#39;</span><span class="p">,</span>
<span class="s1">&#39;IGeometryData&#39;</span><span class="p">,</span>
<span class="s1">&#39;INotificationFilter&#39;</span><span class="p">,</span>
<span class="s1">&#39;INotificationSubscriber&#39;</span>
<span class="p">]</span>
<span class="kn">import</span> <span class="nn">abc</span>
<span class="kn">from</span> <span class="nn">six</span> <span class="kn">import</span> <span class="n">with_metaclass</span>
<div class="viewcode-block" id="IDataRequest"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest">[docs]</a><span class="k">class</span> <span class="nc">IDataRequest</span><span class="p">(</span><span class="n">with_metaclass</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABCMeta</span><span class="p">,</span> <span class="nb">object</span><span class="p">)):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> An IDataRequest to be submitted to the DataAccessLayer to retrieve data.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<div class="viewcode-block" id="IDataRequest.setDatatype"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.setDatatype">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">setDatatype</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">datatype</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Sets the datatype of the request.</span>
<span class="sd"> Args:</span>
<span class="sd"> datatype: A string of the datatype, such as &quot;grid&quot;, &quot;radar&quot;, &quot;gfe&quot;, &quot;obs&quot;</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.addIdentifier"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.addIdentifier">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">addIdentifier</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">,</span> <span class="n">value</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Adds an identifier to the request. Identifiers are specific to the</span>
<span class="sd"> datatype being requested.</span>
<span class="sd"> Args:</span>
<span class="sd"> key: the string key of the identifier</span>
<span class="sd"> value: the value of the identifier</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.setParameters"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.setParameters">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">setParameters</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">params</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Sets the parameters of data to request.</span>
<span class="sd"> Args:</span>
<span class="sd"> params: a list of strings of parameters to request</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.setLevels"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.setLevels">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">setLevels</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">levels</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Sets the levels of data to request. Not all datatypes support levels.</span>
<span class="sd"> Args:</span>
<span class="sd"> levels: a list of strings of level abbreviations to request</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.setEnvelope"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.setEnvelope">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">setEnvelope</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">env</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Sets the envelope of the request. If supported by the datatype factory,</span>
<span class="sd"> the data returned for the request will be constrained to only the data</span>
<span class="sd"> within the envelope.</span>
<span class="sd"> Args:</span>
<span class="sd"> env: a shapely geometry</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.setLocationNames"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.setLocationNames">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">setLocationNames</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">locationNames</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Sets the location names of the request.</span>
<span class="sd"> Args:</span>
<span class="sd"> locationNames: a list of strings of location names to request</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.getDatatype"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.getDatatype">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getDatatype</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the datatype of the request</span>
<span class="sd"> Returns:</span>
<span class="sd"> the datatype set on the request</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.getIdentifiers"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.getIdentifiers">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getIdentifiers</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the identifiers on the request</span>
<span class="sd"> Returns:</span>
<span class="sd"> a dictionary of the identifiers</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.getLevels"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.getLevels">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getLevels</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the levels on the request</span>
<span class="sd"> Returns:</span>
<span class="sd"> a list of strings of the levels</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.getLocationNames"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.getLocationNames">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getLocationNames</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the location names on the request</span>
<span class="sd"> Returns:</span>
<span class="sd"> a list of strings of the location names</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div>
<div class="viewcode-block" id="IDataRequest.getEnvelope"><a class="viewcode-back" href="../../api/IDataRequest.html#awips.dataaccess.IDataRequest.getEnvelope">[docs]</a> <span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getEnvelope</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the envelope on the request</span>
<span class="sd"> Returns:</span>
<span class="sd"> a rectangular shapely geometry</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span></div></div>
<span class="k">class</span> <span class="nc">IData</span><span class="p">(</span><span class="n">with_metaclass</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABCMeta</span><span class="p">,</span> <span class="nb">object</span><span class="p">)):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> An IData representing data returned from the DataAccessLayer.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getAttribute</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">key</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets an attribute of the data.</span>
<span class="sd"> Args:</span>
<span class="sd"> key: the key of the attribute</span>
<span class="sd"> Returns:</span>
<span class="sd"> the value of the attribute</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getAttributes</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the valid attributes for the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> a list of strings of the attribute names</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getDataTime</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the data time of the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> the data time of the data, or None if no time is associated</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getLevel</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the level of the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> the level of the data, or None if no level is associated</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getLocationName</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">param</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the location name of the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> the location name of the data, or None if no location name is</span>
<span class="sd"> associated</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="k">class</span> <span class="nc">IGridData</span><span class="p">(</span><span class="n">IData</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> An IData representing grid data that is returned by the DataAccessLayer.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getParameter</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the parameter of the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> the parameter of the data</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getUnit</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the unit of the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> the string abbreviation of the unit, or None if no unit is associated</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getRawData</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the grid data as a numpy array.</span>
<span class="sd"> Returns:</span>
<span class="sd"> a numpy array of the data</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getLatLonCoords</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the lat/lon coordinates of the grid data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> a tuple where the first element is a numpy array of lons, and the</span>
<span class="sd"> second element is a numpy array of lats</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="k">class</span> <span class="nc">IGeometryData</span><span class="p">(</span><span class="n">IData</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> An IData representing geometry data that is returned by the DataAccessLayer.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getGeometry</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the geometry of the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> a shapely geometry</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getParameters</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Gets the parameters of the data.</span>
<span class="sd"> Returns:</span>
<span class="sd"> a list of strings of the parameter names</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getString</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">param</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the string value of the specified param.</span>
<span class="sd"> Args:</span>
<span class="sd"> param: the string name of the param</span>
<span class="sd"> Returns:</span>
<span class="sd"> the string value of the param</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getNumber</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">param</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the number value of the specified param.</span>
<span class="sd"> Args:</span>
<span class="sd"> param: the string name of the param</span>
<span class="sd"> Returns:</span>
<span class="sd"> the number value of the param</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getUnit</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">param</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the unit of the specified param.</span>
<span class="sd"> Args:</span>
<span class="sd"> param: the string name of the param</span>
<span class="sd"> Returns:</span>
<span class="sd"> the string abbreviation of the unit of the param</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">getType</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">param</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Gets the type of the param.</span>
<span class="sd"> Args:</span>
<span class="sd"> param: the string name of the param</span>
<span class="sd"> Returns:</span>
<span class="sd"> a string of the type of the parameter, such as</span>
<span class="sd"> &quot;STRING&quot;, &quot;INT&quot;, &quot;LONG&quot;, &quot;FLOAT&quot;, or &quot;DOUBLE&quot;</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">return</span>
<span class="k">class</span> <span class="nc">INotificationSubscriber</span><span class="p">(</span><span class="n">with_metaclass</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABCMeta</span><span class="p">,</span> <span class="nb">object</span><span class="p">)):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> An INotificationSubscriber representing a notification filter returned from</span>
<span class="sd"> the DataNotificationLayer.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">subscribe</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">callback</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Subscribes to the requested data. Method will not return until close is</span>
<span class="sd"> called in a separate thread.</span>
<span class="sd"> Args:</span>
<span class="sd"> callback: the method to call with the IGridData/IGeometryData</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="k">pass</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">close</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="sd">&quot;&quot;&quot;Closes the notification subscriber&quot;&quot;&quot;</span>
<span class="k">pass</span>
<span class="k">class</span> <span class="nc">INotificationFilter</span><span class="p">(</span><span class="n">with_metaclass</span><span class="p">(</span><span class="n">abc</span><span class="o">.</span><span class="n">ABCMeta</span><span class="p">,</span> <span class="nb">object</span><span class="p">)):</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="sd"> Represents data required to filter a set of URIs and</span>
<span class="sd"> return a corresponding list of IDataRequest to retrieve data for.</span>
<span class="sd"> &quot;&quot;&quot;</span>
<span class="nd">@abc</span><span class="o">.</span><span class="n">abstractmethod</span>
<span class="k">def</span> <span class="nf">accept</span><span class="p">(</span><span class="n">dataUri</span><span class="p">):</span>
<span class="k">pass</span>
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