package-summary.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

 
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<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DataUtilities.Traversal.html" title="class in org.geotools.data">DataUtilities.Traversal</A></B></TD>
<TD>DOCUMENT ME!</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultFeatureLock.html" title="class in org.geotools.data">DefaultFeatureLock</A></B></TD>
<TD>Used to lock features when used with LockingDataSource.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultFeatureLockFactory.html" title="class in org.geotools.data">DefaultFeatureLockFactory</A></B></TD>
<TD>Default implementation of the FeatureLockFactory.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultFeatureReader.html" title="class in org.geotools.data">DefaultFeatureReader</A></B></TD>
<TD>Basic support for reading Features from an AttributeReader.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultFeatureResults.html" title="class in org.geotools.data">DefaultFeatureResults</A></B></TD>
<TD>Generic "results" of a query, class.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultFIDReader.html" title="class in org.geotools.data">DefaultFIDReader</A></B></TD>
<TD>A Default FIDReader.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultQuery.html" title="class in org.geotools.data">DefaultQuery</A></B></TD>
<TD>The query object is used by the <A HREF="../../../org/geotools/data/FeatureSource.html#getFeatures()"><CODE>FeatureSource.getFeatures()</CODE></A> method of
 the DataSource interface, to encapsulate a request.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultRepository.html" title="class in org.geotools.data">DefaultRepository</A></B></TD>
<TD>Quick hack of a DataRepository allows me to bridge the existing DataStore
 API with these experiments for a Opperations api.
 
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DefaultTransaction.html" title="class in org.geotools.data">DefaultTransaction</A></B></TD>
<TD>Quick implementation of Transaction api.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/Diff.html" title="class in org.geotools.data">Diff</A></B></TD>
<TD>&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DiffFeatureReader.html" title="class in org.geotools.data">DiffFeatureReader</A></B></TD>
<TD>A FeatureReader that considers differences.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DiffFeatureWriter.html" title="class in org.geotools.data">DiffFeatureWriter</A></B></TD>
<TD>A FeatureWriter that captures modifications against a FeatureReader.
 
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/EmptyFeatureReader.html" title="class in org.geotools.data">EmptyFeatureReader</A></B></TD>
<TD>Represents an Empty, Typed, FeatureReader.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/EmptyFeatureWriter.html" title="class in org.geotools.data">EmptyFeatureWriter</A></B></TD>
<TD>Represents an Empty, Typed, FeatureWriter.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FeatureEvent.html" title="class in org.geotools.data">FeatureEvent</A></B></TD>
<TD>A simple event object to represent all events triggered by DataStore
 instances (typically change events).

 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FeatureListenerManager.html" title="class in org.geotools.data">FeatureListenerManager</A></B></TD>
<TD>This class is used by DataStore implementations to provide FeatureListener
 support for the FeatureSources they create.
 
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FeatureLockFactory.html" title="class in org.geotools.data">FeatureLockFactory</A></B></TD>
<TD>This specifies the interface to create FeatureLocks.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FeatureLocking.Response.html" title="class in org.geotools.data">FeatureLocking.Response</A></B></TD>
<TD>Idea for a response from a high-level lock( Query ) function.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FeatureSourceRepository.html" title="class in org.geotools.data">FeatureSourceRepository</A></B></TD>
<TD>Another Quick hack of a DataRepository as a bridge to the Opperations api.
 
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FIDFeatureReader.html" title="class in org.geotools.data">FIDFeatureReader</A></B></TD>
<TD>Experimental FeatureReader that always takes the first column of the
 attributeReader as the FeatureID.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FileDataStoreFinder.html" title="class in org.geotools.data">FileDataStoreFinder</A></B></TD>
<TD>
 Most of this code was copied from DataStoreFinder.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FilteringFeatureReader.html" title="class in org.geotools.data">FilteringFeatureReader</A></B></TD>
<TD>Basic support for a FeatureReader that does filtering.  </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FilteringFeatureWriter.html" title="class in org.geotools.data">FilteringFeatureWriter</A></B></TD>
<TD>Filtering is performed on this hasNext() method.
 
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/InProcessLockingManager.html" title="class in org.geotools.data">InProcessLockingManager</A></B></TD>
<TD>Provides In-Process FeatureLocking support for DataStore implementations.
 
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/JoiningAttributeReader.html" title="class in org.geotools.data">JoiningAttributeReader</A></B></TD>
<TD>Attribute Reader that joins.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/JoiningAttributeWriter.html" title="class in org.geotools.data">JoiningAttributeWriter</A></B></TD>
<TD>Provides ...</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/MaxFeatureReader.html" title="class in org.geotools.data">MaxFeatureReader</A></B></TD>
<TD>Basic support for a FeatureReader that limits itself to the number of
 features passed in.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/PrjFileReader.html" title="class in org.geotools.data">PrjFileReader</A></B></TD>
<TD>&nbsp;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/ReTypeFeatureReader.html" title="class in org.geotools.data">ReTypeFeatureReader</A></B></TD>
<TD>Supports on the fly retyping of FeatureReader contents.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/TransactionStateDiff.html" title="class in org.geotools.data">TransactionStateDiff</A></B></TD>
<TD>A Transaction.State that keeps a difference table for use with
 AbstractDataStore.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/WorldFileReader.html" title="class in org.geotools.data">WorldFileReader</A></B></TD>
<TD>This class is responsible for parsing a world file in order to build an
 affine transform using the parameters provided in the file itself.
 
 </TD>
</TR>
</TABLE>
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<P>

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<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Exception Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/DataSourceException.html" title="class in org.geotools.data">DataSourceException</A></B></TD>
<TD>Thrown when there is an error in a datasource.
 </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/FeatureLockException.html" title="class in org.geotools.data">FeatureLockException</A></B></TD>
<TD>Indicates a lock contention, and attempt was made to modify or aquire with
 out Authroization.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD WIDTH="15%"><B><A HREF="../../../org/geotools/data/SchemaNotFoundException.html" title="class in org.geotools.data">SchemaNotFoundException</A></B></TD>
<TD>Indicates a FeatureType could not be found.</TD>
</TR>
</TABLE>
&nbsp;

<P>
<A NAME="package_description"><!-- --></A><H2>
Package org.geotools.data Description
</H2>

<P>
Defines the DataStoreAPI via which all data is imported or exported.
<p>
  All DataStores (e.g. PostGIS, Shapefile(tm), GML...) must provide
implementations of the DataStore interface and the DataStoreFactorySpi
interface.  These interfaces allow new types of datastore to be plugged into
applications which use geotools without the need to modify any code.
<p>
Example:</p>
<pre>
<code>
FeatureStore postgis = new PostGisDataStore( ... );
Query all = Query.ALL;
FeatureType roadType = postgis.getFeatureType( "roads" );

// reader 1 streams over all roads
FeatureReader reader1 = postgis.getFeatureReader( roadsType, all, Transaction.AUTO_COMMIT );

// allRoads = featureResults is a prepaired query of all roads
FeatureSource roads = postgis.getFeatureSource( "roads" );
FeatureResults allRoads = roads.getFeatures( all );

// reader 2 & 3 streams over all roads in the same manner as reader 1
FeatureReader reader2 = allRoads.reader();
FeatureReader reader3 = allRoads.reader();

// bounds1 returns the bounding box of roads, may be null depending on expense
Envelope bounds1 = roads.getBounds( all );

// bounds2 returns the bounding box of roads, may actually calculate by going over the entire dataset
Envelope bounds 2 = allRoads.getBounds(); 
<code>
</pre>
<P>

<P>
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