featureevent.html

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<A NAME="FEATURES_ADDED"><!-- --></A><H3>
FEATURES_ADDED</H3>
<PRE>
public static final int <B>FEATURES_ADDED</B></PRE>
<DL>
<DD>Event type constant denoting the adding of a feature.

 <p>
 This EventType is used when FeatureWriter.write() is called when
 <code>FeatureWriter.hasNext()</code> has previously returned
 <code>false</code>. This action represents a newly create Feature being
 passed to the DataStore.
 </p>

 <p>
 The FeatureWriter making the modification will need to check that
 <code>typeName</code> it is modifing matches the
 <code>FeatureSource.getSchema().getTypeName()</code> before sending
 notification to any listeners on the FeatureSource.
 </p>

 <p>
 If the FeatureWriter is opperating against a Transaction it will need
 ensure that to check the FeatureSource.getTransaction() for a match
 before sending notification to any listeners on the FeatureSource.
 </p>

 <p>
 FeatureEvent.getBounds() should reflect the the Bounding Box of the
 newly created Features.
 </p>
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#org.geotools.data.FeatureEvent.FEATURES_ADDED">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="FEATURES_CHANGED"><!-- --></A><H3>
FEATURES_CHANGED</H3>
<PRE>
public static final int <B>FEATURES_CHANGED</B></PRE>
<DL>
<DD>Event type constant denoting that features in the collection has been
 modified.

 <p>
 This EventType is used when a FeatureWriter.write() is called when
 <code>FeatureWriter.hasNext()</code> returns <code>true</code> and the
 current Feature has been changed. This EventType is also used when a
 Transaction <code>commit()</code> or <code>rolledback</code> is called.
 </p>

 <p>
 The FeatureWriter making the modification will need to check that
 <code>typeName</code> it is modifing matches the
 <code>FeatureSource.getSchema().getTypeName()</code> before sending
 notification to any listeners on the FeatureSource.
 </p>

 <p>
 If the FeatureWriter is opperating against a Transaction it will need
 ensure that to check the FeatureSource.getTransaction() for a match
 before sending notification to any listeners on the FeatureSource. All
 FeatureSources of the same typename will need to be informed of a
 <code>commit</code>, except ones in the same Transaction,  and only
 FeatureSources in the same Transaction will need to be informed of a
 rollback.
 </p>

 <p>
 FeatureEvent.getBounds() should reflect the the BoundingBox of the
 FeatureWriter modified Features. This may not be possible during a
 <code>commit()</code> or <code>rollback()</code> opperation.
 </p>
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#org.geotools.data.FeatureEvent.FEATURES_CHANGED">Constant Field Values</A></DL>
</DL>
<HR>

<A NAME="FEATURES_REMOVED"><!-- --></A><H3>
FEATURES_REMOVED</H3>
<PRE>
public static final int <B>FEATURES_REMOVED</B></PRE>
<DL>
<DD>Event type constant denoting the removal of a feature.

 <p>
 This EventType is used when FeatureWriter.remove() is called. This
 action represents a Feature being removed from the DataStore.
 </p>

 <p>
 The FeatureWriter making the modification will need to check that
 <code>typeName</code> it is modifing matches the
 <code>FeatureSource.getSchema().getTypeName()</code> before sending
 notification to any listeners on the FeatureSource.
 </p>

 <p>
 If the FeatureWriter is opperating against a Transaction it will need
 ensure that to check the FeatureSource.getTransaction() for a match
 before sending notification to any listeners on the FeatureSource.
 </p>

 <p>
 FeatureEvent.getBounds() should reflect the the Bounding Box of the
 removed Features.
 </p>
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#org.geotools.data.FeatureEvent.FEATURES_REMOVED">Constant Field Values</A></DL>
</DL>

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<A NAME="FeatureEvent(org.geotools.data.FeatureSource, int, com.vividsolutions.jts.geom.Envelope)"><!-- --></A><H3>
FeatureEvent</H3>
<PRE>
public <B>FeatureEvent</B>(<A HREF="../../../org/geotools/data/FeatureSource.html" title="interface in org.geotools.data">FeatureSource</A>&nbsp;featureSource,
                    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>Constructs a new FeatureEvent.
<P>
<DT><B>Parameters:</B><DD><CODE>featureSource</CODE> - The DataStore that fired the event<DD><CODE>eventType</CODE> - One of FEATURE_CHANGED, FEATURE_REMOVED or
        FEATURE_ADDED<DD><CODE>bounds</CODE> - The area modified by this change</DL>

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<A NAME="getFeatureSource()"><!-- --></A><H3>
getFeatureSource</H3>
<PRE>
public <A HREF="../../../org/geotools/data/FeatureSource.html" title="interface in org.geotools.data">FeatureSource</A> <B>getFeatureSource</B>()</PRE>
<DL>
<DD>Provides access to the FeatureSource which fired the event.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The FeatureSource which was the event's source.</DL>
</DD>
</DL>
<HR>

<A NAME="getEventType()"><!-- --></A><H3>
getEventType</H3>
<PRE>
public int <B>getEventType</B>()</PRE>
<DL>
<DD>Provides information on the type of change that has occured. Possible
 types are: add, remove, change
<P>
<DD><DL>

<DT><B>Returns:</B><DD>an int which must be one of FEATURES_ADDED, FEATURES_REMOVED,
         FEATURES_CHANGED</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>Provides access to the area modified (if known).
<P>
<DD><DL>

<DT><B>Returns:</B><DD>A bounding box of the modifications or <code>null</code> if
         unknown.</DL>
</DD>
</DL>
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