difffeaturewriter.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="diff"><!-- --></A><H3>
diff</H3>
<PRE>
protected <A HREF="../../../org/geotools/data/Diff.html" title="class in org.geotools.data">Diff</A> <B>diff</B></PRE>
<DL>
<DL>
</DL>
</DL>

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<A NAME="DiffFeatureWriter(org.geotools.data.FeatureReader, org.geotools.data.Diff)"><!-- --></A><H3>
DiffFeatureWriter</H3>
<PRE>
public <B>DiffFeatureWriter</B>(<A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A>&nbsp;reader,
                         <A HREF="../../../org/geotools/data/Diff.html" title="class in org.geotools.data">Diff</A>&nbsp;diff)</PRE>
<DL>
<DD>DiffFeatureWriter construction.
<P>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - <DD><CODE>diff</CODE> - </DL>
<HR>

<A NAME="DiffFeatureWriter(org.geotools.data.FeatureReader, org.geotools.data.Diff, org.geotools.filter.Filter)"><!-- --></A><H3>
DiffFeatureWriter</H3>
<PRE>
public <B>DiffFeatureWriter</B>(<A HREF="../../../org/geotools/data/FeatureReader.html" title="interface in org.geotools.data">FeatureReader</A>&nbsp;reader,
                         <A HREF="../../../org/geotools/data/Diff.html" title="class in org.geotools.data">Diff</A>&nbsp;diff,
                         <A HREF="../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A>&nbsp;filter)</PRE>
<DL>
<DD>DiffFeatureWriter construction.
<P>
<DT><B>Parameters:</B><DD><CODE>reader</CODE> - <DD><CODE>diff</CODE> - <DD><CODE>filter</CODE> - </DL>

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<B>Method Detail</B></FONT></TD>
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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>Supplys FeatureTypeFrom reader
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureWriter.html#getFeatureType()">getFeatureType</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>FeatureType this writer has been configured to create.<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/data/FeatureWriter.html#getFeatureType()"><CODE>FeatureWriter.getFeatureType()</CODE></A></DL>
</DD>
</DL>
<HR>

<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></PRE>
<DL>
<DD>Next Feature from reader or new content.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureWriter.html#next()">next</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>Feature from Query, or newly appended Feature
<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/FeatureWriter.html#next()"><CODE>FeatureWriter.next()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="remove()"><!-- --></A><H3>
remove</H3>
<PRE>
public void <B>remove</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/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</A></CODE></B></DD>
<DD>Removes current Feature, must be called before hasNext.

 <p>
 FeatureWriters will need to allow all FeatureSources of the same
 typeName to issue a FeatureEvent event of type
 <code>FeatureEvent.FEATURES_REMOVED</code> when this method is called.
 </p>

 <p>
 If this FeatureWriter is opperating against a Transaction
 FEATURES_REMOVED events should only be sent to FeatureSources operating
 on the same Transaction. When Transaction commit() is called other
 FeatureSources will be informed of the modifications.
 </p>

 <p>
 When the current Feature has been provided as new content, this method
 "cancels" the add opperation (and notification needed).
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureWriter.html#remove()">remove</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</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!<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/data/FeatureWriter.html#remove()"><CODE>FeatureWriter.remove()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="write()"><!-- --></A><H3>
write</H3>
<PRE>
public void <B>write</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>Writes out the current feature.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureWriter.html#write()">write</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</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/FeatureWriter.html#write()"><CODE>FeatureWriter.write()</CODE></A></DL>
</DD>
</DL>
<HR>

<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 more content.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureWriter.html#hasNext()">hasNext</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD><code>true</code> if an additional <code>Feature</code> is
         available.
<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/FeatureWriter.html#hasNext()"><CODE>FeatureWriter.hasNext()</CODE></A></DL>
</DD>
</DL>
<HR>

<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>Clean up resources associated with this writer.
 
 <p>
 Diff is not clear()ed as it is assumed that it belongs to a
 Transaction.State object and may yet be written out.
 </p>
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/data/FeatureWriter.html#close()">close</A></CODE> in interface <CODE><A HREF="../../../org/geotools/data/FeatureWriter.html" title="interface in org.geotools.data">FeatureWriter</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> - if there there are problems releasing underlying resources, or
 possibly if close has been called (up to the implementation).<DT><B>See Also:</B><DD><A HREF="../../../org/geotools/data/FeatureWriter.html#close()"><CODE>FeatureWriter.close()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="fireNotification(int, com.vividsolutions.jts.geom.Envelope)"><!-- --></A><H3>
fireNotification</H3>
<PRE>
protected abstract void <B>fireNotification</B>(int&nbsp;eventType,
                                         <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;bounds)</PRE>
<DL>
<DD>Subclass must provide the notification.
 
 <p>
 Notification requirements for modifications against a Transaction should
 only be issued to FeatureSource instances that opperate against the
 same typeName and Transaction.
 </p>
 
 <p>
 Other FeatureSource instances with the same typeName will be notified
 when the Transaction is committed.
 </p>
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>eventType</CODE> - One of FeatureType.FEATURES_ADDED, FeatureType.CHANGED,
        FeatureType.FEATURES_REMOVED<DD><CODE>bounds</CODE> - </DL>
</DD>
</DL>
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