indexedfeatureresults.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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<A NAME="getSchema()"><!-- --></A><H3>
getSchema</H3>
<PRE>
public <A HREF="../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A> <B>getSchema</B>()
                      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 interface: <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></B></DD>
<DD>Returns the FeatureType of the contents of this collection.

 <p>
 Please note that for a collection with a mixed contents the FeatureType
 may be degenerate (ie very generic). For many applications (like
 shapefiles or tables) the FeatureType can safely be used to describe
 all the Features in the result set.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/FeatureResults.html#getSchema()">getSchema</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>A FeatureType that describes the contents of this collection.
<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> - if their is a problem getting the FeatureType.<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/FeatureResults.html#getSchema()"><CODE>FeatureResults.getSchema()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="reader(com.vividsolutions.jts.geom.Envelope)"><!-- --></A><H3>
reader</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A> <B>reader</B>(<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>&nbsp;envelope)
                     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>
</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/FeatureResults.html#reader()"><CODE>FeatureResults.reader()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getBounds()"><!-- --></A><H3>
getBounds</H3>
<PRE>
public <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>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></B></DD>
<DD>Returns the bounding box of this FeatureResults.

 <p>
 This opperation may be expensive. Consider
 <code>FeatureSource.getBounds( Query )</code> as an alternative.
 </p>
 This method is logically the same as:
 <pre>
 <code>
 <b>public</b> Envelope getBounds() <b>throws</b> IOException {
     Envelope newBBox = <b>new</b> Envelope();
     Envelope internal;
     Feature feature;

     <b>for</b> (FeatureReader r = reader(); r.hasNext();) {
         feature = r.next();
         internal = feature.getDefaultGeometry().getEnvelopeInternal();
         newBBox.expandToInclude(internal);
     }
     <b>return</b> newBBox;
 }
 </code>
 </pre>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/FeatureResults.html#getBounds()">getBounds</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Bounding box of this FeatureResults, or an empty Envelope<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/FeatureResults.html#getBounds()"><CODE>FeatureResults.getBounds()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getCount()"><!-- --></A><H3>
getCount</H3>
<PRE>
public int <B>getCount</B>()
             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 interface: <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></B></DD>
<DD>Returns the number of Features in this FeatureResults.

 <p>
 This opperation may be expensive. Consider <code>FeatureSource.getCount(
 Query )</code> as an alternative.
 </p>
 This method is logically the same as:
 <pre>
 <code>
 <b>public</b> int getCount() <b>throws</b> IOException {
     <b>int</b> count = 0;
     <b>for</b> (FeatureReader r = reader(); r.hasNext(); count++) {
         r.next();
     }
     <b>return</b> count;
 }
 </code>
 </pre>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/FeatureResults.html#getCount()">getCount</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The number of Features in this FeatureResults.
<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> - If there are problems getting the count<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/FeatureResults.html#getCount()"><CODE>FeatureResults.getCount()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="collection()"><!-- --></A><H3>
collection</H3>
<PRE>
public <A HREF="../../../../org/geotools/feature/FeatureCollection.html" title="interface in org.geotools.feature">FeatureCollection</A> <B>collection</B>()
                             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 interface: <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></B></DD>
<DD>Convert this set of results to a FeatureCollection.

 <p>
 This method is logically the same as:
 <pre><code>
 <b>public</b> FeatureCollection collection() <b>throws</b> IOException {
     FeatureCollection collection = FeatureCollections.newCollection()
     <b>for</b> (FeatureReader r = reader(); r.hasNext();) {
         collection.add( r.next() );
     }
     <b>return</b> collection;
 }
 </code></pre>
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/FeatureResults.html#collection()">collection</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>DOCUMENT ME!
<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> - If any problems occur aquiring Features<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/FeatureResults.html#collection()"><CODE>FeatureResults.collection()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="reader()"><!-- --></A><H3>
reader</H3>
<PRE>
public <A HREF="../../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A> <B>reader</B>()
                     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 interface: <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></B></DD>
<DD>Provides access to the Features, please note that FeatureReader is a
 blocking api.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/data/FeatureResults.html#reader()">reader</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/data/FeatureResults.html" title="interface in org.geotools.data">FeatureResults</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>A FeatureReader streaming over the FeatureResults
<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> - DOCUMENT ME!<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/data/FeatureResults.html#reader()"><CODE>FeatureResults.reader()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="setQueryBounds(com.vividsolutions.jts.geom.Envelope)"><!-- --></A><H3>
setQueryBounds</H3>
<PRE>
public void <B>setQueryBounds</B>(<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>&nbsp;queryBounds)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>queryBounds</CODE> - an Envelope defining the boundary of the query</DL>
</DD>
</DL>
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