wfsdatastore.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

  FeatureType schema = getSchema( typeName );
  FeatureReader reader = new DefaultFeatureReader( getAttributeReaders(), schema );

  if (filter != Filter.NONE) {
      reader = new FilteringFeatureReader(reader, filter);
  }

  if (transaction != Transaction.AUTO_COMMIT) {
      Map diff = state(transaction).diff(typeName);
      reader = new DiffFeatureReader(reader, diff);
  }

  if (!featureType.equals(reader.getFeatureType())) {
      reader = new ReTypeFeatureReader(reader, featureType);
  }
 return reader
 </code></pre>
 <p>
 Locking support does not need to be provided for FeatureReaders.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureReader(org.geotools.data.Query, org.geotools.data.Transaction)">getFeatureReader</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html#getFeatureReader(org.geotools.data.Query, org.geotools.data.Transaction)">getFeatureReader</A></CODE> in class <CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html" title="class in org.geotools.data">AbstractDataStore</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE><DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureReader(org.geotools.data.Query, org.geotools.data.Transaction)"><CODE>DataStore.getFeatureReader(org.geotools.data.Query, org.geotools.data.Transaction)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getBounds(org.geotools.data.Query)"><!-- --></A><H3>
getBounds</H3>
<PRE>
protected <A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/Envelope.html" title="class or interface in com.vividsolutions.jts.geom">Envelope</A> <B>getBounds</B>(<A HREF="../../../../org/geotools/data/Query.html" title="interface in org.geotools.data">Query</A>&nbsp;query)
                      throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html" title="class in org.geotools.data">AbstractDataStore</A></CODE></B></DD>
<DD>Computes the bounds of the features for the specified feature type that
 satisfy the query provided that there is a fast way to get that result.
 <p>
 Will return null if there is not fast way to compute the bounds. Since
 it's based on some kind of header/cached information, it's not guaranteed
 to be real bound of the features
 </p>
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html#getBounds(org.geotools.data.Query)">getBounds</A></CODE> in class <CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html" title="class in org.geotools.data">AbstractDataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>query</CODE> - 
<DT><B>Returns:</B><DD>the bounds, or null if too expensive
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="splitFilters(org.geotools.data.Query, org.geotools.data.Transaction)"><!-- --></A><H3>
splitFilters</H3>
<PRE>
protected <A HREF="../../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>[] <B>splitFilters</B>(<A HREF="../../../../org/geotools/data/Query.html" title="interface in org.geotools.data">Query</A>&nbsp;q,
                                <A HREF="../../../../org/geotools/data/Transaction.html" title="interface in org.geotools.data">Transaction</A>&nbsp;t)
                         throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getUnsupportedFilter(java.lang.String, org.geotools.filter.Filter)"><!-- --></A><H3>
getUnsupportedFilter</H3>
<PRE>
protected <A HREF="../../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A> <B>getUnsupportedFilter</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;typeName,
                                      <A HREF="../../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html" title="class in org.geotools.data">AbstractDataStore</A></CODE></B></DD>
<DD>GR: if a subclass supports filtering, it should override this method
 to return the unsupported part of the passed filter, so a
 FilteringFeatureReader will be constructed upon it. Otherwise it will
 just return the same filter.
 <p>
 If the complete filter is supported, the subclass must return <code>Filter.NONE</code>
 </p>
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html#getUnsupportedFilter(java.lang.String, org.geotools.filter.Filter)">getUnsupportedFilter</A></CODE> in class <CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html" title="class in org.geotools.data">AbstractDataStore</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/AbstractDataStore.html#getUnsupportedFilter(java.lang.String, org.geotools.filter.Filter)"><CODE>AbstractDataStore.getUnsupportedFilter(java.lang.String,
      org.geotools.filter.Filter)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getFeatureSource(java.lang.String)"><!-- --></A><H3>
getFeatureSource</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureSource.html" title="interface in org.geotools.data">FeatureSource</A> <B>getFeatureSource</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;typeName)
                               throws <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html" title="class in org.geotools.data">AbstractDataStore</A></CODE></B></DD>
<DD>Default implementation based on getFeatureReader and getFeatureWriter.

 <p>
 We should be able to optimize this to only get the RowSet once
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureSource(java.lang.String)">getFeatureSource</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/DataStore.html" title="interface in org.geotools.data">DataStore</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html#getFeatureSource(java.lang.String)">getFeatureSource</A></CODE> in class <CODE><A HREF="../../../../org/geotools/data/AbstractDataStore.html" title="class in org.geotools.data">AbstractDataStore</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/io/IOException.html" title="class or interface in java.io">IOException</A></CODE><DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/DataStore.html#getFeatureSource(java.lang.String)"><CODE>DataStore.getFeatureSource(java.lang.String)</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="processFilter(org.geotools.filter.Filter)"><!-- --></A><H3>
processFilter</H3>
<PRE>
public <A HREF="../../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A> <B>processFilter</B>(<A HREF="../../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter)</PRE>
<DL>
<DD>Runs <A HREF="../../../../org/geotools/data/wfs/FidFilterVisitor.html" title="class in org.geotools.data.wfs"><CODE>FidFilterVisitor</CODE></A> on the filter and returns the result as long as transaction is not AUTO_COMMIT or null.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>filter</CODE> - filter to process.
<DT><B>Returns:</B><DD>Runs <A HREF="../../../../org/geotools/data/wfs/FidFilterVisitor.html" title="class in org.geotools.data.wfs"><CODE>FidFilterVisitor</CODE></A> on the filter and returns the result as long as transaction is not AUTO_COMMIT or null.</DL>
</DD>
</DL>
<HR>

<A NAME="addFidMapping(java.lang.String, java.lang.String)"><!-- --></A><H3>
addFidMapping</H3>
<PRE>
public void <B>addFidMapping</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;original,
                          <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A>&nbsp;finalFid)</PRE>
<DL>
<DD>Adds a new fid mapping to the fid map.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>original</CODE> - the before fid<DD><CODE>finalFid</CODE> - the final fid;</DL>
</DD>
</DL>
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