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<h1>Introduction</h1>

<p>JPOX-Spatial allows the use of <a href="http://www.jpox.org/">JPOX</a> as persistence layer for geospatial applications in an environment that supports the OGC SFA specification. It defines type mappings to let JPOX know how to persist a number of different Java geometry types (JTS, PostGIS-JDBC geometry types, Oracle's JGeometry). Thus a Java developer can mix spatial and non-spatial datatypes in his POJOs and can rely on JPOX to persist and query those types.</p>

<p>The mission for the JPOX Extension is to:</p>
<ul class="alternate">
	<li>Use of OGC Filter to produce a query against JPOX</li>
	<li>Expression evaulation against a POJO using JXPath</li>
	<li>Glue code for JPOX-Spatial Domains Models to be viewed as a simple POJODataStore</li>
	<li>Additional utility code to assist intergration between POJO domain model and GeoTools as required</li>
</ul>

<p>How you can help?</p>
<ul class="alternate">
	<li>provide a test data set (and public database) with an interesting &quot;complex&quot; domain model</li>
</ul>

<p>The following needs to be sorted out:</p>
<ul class="alternate">
	<li><a class="confluence-link" href="#Filter Support" data-anchor="Filter Support" data-linked-resource-default-alias="Filter Support" data-base-url="http://docs.codehaus.org">#Filter Support</a></li>
	<li><a class="confluence-link" href="#Data Access" data-anchor="Data Access" data-linked-resource-default-alias="Data Access" data-base-url="http://docs.codehaus.org">#Data Access</a></li>
	<li><a class="confluence-link" href="#Rendering" data-anchor="Rendering" data-linked-resource-default-alias="Rendering" data-base-url="http://docs.codehaus.org">#Rendering</a></li>
</ul>

<p>The following documentation is available (or at least intended):</p>
<img class="editor-inline-macro" src="/plugins/servlet/confluence/placeholder/macro?definition=e2NoaWxkcmVuOmV4Y2VycHQ9dHJ1ZX0&amp;locale=en_GB&amp;version=2" data-macro-name="children" data-macro-parameters="excerpt=true">

<h2>Filter Support</h2>

<p>Since most everything in the spatial world (pun intended) with OGC Filter - this is the first step. It will enable our Data Access and Rendering intergration.</p>

<h2>Pojo Property Accessor</h2>

<p>We need to make use of the <a class="confluence-link" href="/display/GEOTOOLS/Expression+Improvements" data-linked-resource-id="66120" data-linked-resource-type="page" data-linked-resource-default-alias="Expression Improvements" data-base-url="http://docs.codehaus.org">Expression Improvements</a> PropertyAccessor API to teach the filter system about working with Plain-Old-Java-Objects.</p>

<p>This can be done in two parts:</p>
<ul class="alternate">
	<li>simple reflection to access Bean properties (or reflection straight to Java fields?)</li>
	<li>full xpath support with JXPath (easy since beans + collections already supported)</li>
</ul>

<p>This will allow the post processing filters to work.</p>

<h2>Filter to JPOX Query Transformation</h2>

<p>This work has been done for BBox query; we will need to go through the list.</p>

<h1>Data Access</h1>

<p>See the separate wiki page for this: <a class="confluence-link" href="/display/GEOTOOLS/Dry+Run+at+DataAccess+Story" data-linked-resource-id="68027" data-linked-resource-type="page" data-linked-resource-default-alias="Dry Run at DataAccess Story" data-base-url="http://docs.codehaus.org">Dry Run at DataAccess Story</a></p>

<h1>Rendering</h1>

<p>Given the above two the following is needed for rendering intergration:</p>
<ul class="alternate">
	<li>Teach PropertyAccessor the concept of &quot;default geometry&quot;
	<ul>
		<li>Add getDefaultGeometry() to PropertyAccessor interface.</li>
	</ul>
	</li>
	<li>Teach StreamingRenderer how to work with Content class rather then FeatureSource.
	<ul>
		<li>ok</li>
	</ul>
	</li>
	<li>Implement DataAccess and Source for JPOX
	<ul>
		<li>ok</li>
	</ul>
	</li>
</ul>