filteringfeaturereader.html

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<A NAME="featureReader"><!-- --></A><H3>
featureReader</H3>
<PRE>
protected final <A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A> <B>featureReader</B></PRE>
<DL>
<DL>
</DL>
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<A NAME="filter"><!-- --></A><H3>
filter</H3>
<PRE>
protected final <A HREF="../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A> <B>filter</B></PRE>
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<DL>
</DL>
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<A NAME="next"><!-- --></A><H3>
next</H3>
<PRE>
protected <A HREF="../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A> <B>next</B></PRE>
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<A NAME="FilteringFeatureReader(org.geotools.data.FeatureReader, org.geotools.filter.Filter)"><!-- --></A><H3>
FilteringFeatureReader</H3>
<PRE>
public <B>FilteringFeatureReader</B>(<A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A>&nbsp;featureReader,
                              <A HREF="../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter)</PRE>
<DL>
<DD>Creates a new instance of AbstractFeatureReader
 
 <p>
 Please don't call this method with Filter.NONE or Filter.ALL (consider
 not filtering and EmptyFeatureReader instead)
 </p>
<P>
<DT><B>Parameters:</B><DD><CODE>featureReader</CODE> - FeatureReader being filtered<DD><CODE>filter</CODE> - Filter used to limit the results of featureReader</DL>

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<A NAME="next()"><!-- --></A><H3>
next</H3>
<PRE>
public <A HREF="../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A> <B>next</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>,
                    <A HREF="../../../org/geotools/feature/IllegalAttributeException.html" title="class in org.geotools.feature">IllegalAttributeException</A>,
                    <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/NoSuchElementException.html" title="class or interface in java.util">NoSuchElementException</A></PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A></CODE></B></DD>
<DD>Reads the next Feature in the FeatureReader.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureReader.html#next()">next</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The next feature in the reader.
<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/NoSuchElementException.html" title="class or interface in java.util">NoSuchElementException</A></CODE> - If there are no more Features in the
         Reader.
<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 an error occurs reading the Feature.
<DD><CODE><A HREF="../../../org/geotools/feature/IllegalAttributeException.html" title="class in org.geotools.feature">IllegalAttributeException</A></CODE> - If the attributes read do not comply
         with the FeatureType.</DL>
</DD>
</DL>
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<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</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/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A></CODE></B></DD>
<DD>Release the underlying resources associated with this stream.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureReader.html#close()">close</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</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> - DOCUMENT ME!</DL>
</DD>
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<A NAME="getFeatureType()"><!-- --></A><H3>
getFeatureType</H3>
<PRE>
public <A HREF="../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature">FeatureType</A> <B>getFeatureType</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A></CODE></B></DD>
<DD>Return the FeatureType this reader has been configured to create.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureReader.html#getFeatureType()">getFeatureType</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the FeatureType of the Features this FeatureReader will create.</DL>
</DD>
</DL>
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<A NAME="hasNext()"><!-- --></A><H3>
hasNext</H3>
<PRE>
public boolean <B>hasNext</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>Query for additional content.
 
 <p>
 This class will peek ahead to see if there is additional content.
 </p>
 
 <p>
 Chris has pointed out that we could make use of AttributeReader based filtering:<br>
 <i>"Also doing things in the Attribute Reader would allow us to do the
 smart filtering, only looking at the attributes needed for comparison,
 whereas doing filtering here means we have to create an entire feature
 each time."</i>
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureReader.html#hasNext()">hasNext</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if we have additional content
<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 the reader we are filtering encounters a problem
<DD><CODE><A HREF="../../../org/geotools/data/DataSourceException.html" title="class in org.geotools.data">DataSourceException</A></CODE> - See IOException</DL>
</DD>
</DL>
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