public class MemoryFeatureWriter extends Object implements FeatureWriter<SimpleFeatureType,SimpleFeature>
| Constructor and Description |
|---|
MemoryFeatureWriter(MemoryState state,
Query query) |
| Modifier and Type | Method and Description |
|---|---|
void |
close()
Release the underlying resources.
|
SimpleFeatureType |
getFeatureType()
FeatureType this reader has been configured to create.
|
boolean |
hasNext()
Query whether this FeatureWriter has another Feature.
|
SimpleFeature |
next()
Reads a Feature from the underlying AttributeReader.
|
void |
remove()
Removes current Feature, must be called before hasNext.
|
void |
write()
Writes the current Feature, must be called before hasNext.
|
public MemoryFeatureWriter(MemoryState state, Query query) throws IOException
IOExceptionpublic SimpleFeatureType getFeatureType()
FeatureWritergetFeatureType in interface FeatureWriter<SimpleFeatureType,SimpleFeature>public SimpleFeature next() throws IOException, NoSuchElementException
FeatureWriterThis method may return a Feature even though hasNext() returns false, this
allows FeatureWriters to provide an ability to append content.
next in interface FeatureWriter<SimpleFeatureType,SimpleFeature>IOException - if the writer has been closed or an I/O error occurs reading the next
Feature.NoSuchElementExceptionpublic void remove()
throws IOException
FeatureWriterFeatureWriters will need to allow all FeatureSources of the same typeName to issue a
FeatureEvent event of type FeatureEvent.FEATURES_REMOVED when this method is
called.
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.
When the current Feature has been provided as new content, this method "cancels" the add opperation (and notification needed).
remove in interface FeatureWriter<SimpleFeatureType,SimpleFeature>IOException - DOCUMENT ME!public void write()
throws IOException
FeatureWriterFeautreWriters will need to allow FeatureSources of the same typeName to issue a FeatureEvent:
false.
true and the resulting Feature has indeed been modified.
If this FeatureWriter is opperating against a Transaction the FEATURES_MODIFIED or FEATURES_ADDED events should only be sent to FeatureSources opperating on the same Transaction. When Transaction commit() is called other FeatureSources will be informed of the modifications.
If you have not called write() when you call hasNext() or next(), no modification will occur().
write in interface FeatureWriter<SimpleFeatureType,SimpleFeature>IOExceptionpublic boolean hasNext()
throws IOException
FeatureWriterPlease note: it is more efficient to construct your FeatureWriter with a Filer (to skip entries you do not want), than to force the creation of entire Features only to skip over them.
FeatureWriters that support append operations will allow calls to next, even when
hasNext() returns false.
hasNext in interface FeatureWriter<SimpleFeatureType,SimpleFeature>true if an additional Feature is available, false
if not.IOException - if an I/O error occurs.public void close()
FeatureWriterclose in interface Closeableclose in interface AutoCloseableclose in interface FeatureWriter<SimpleFeatureType,SimpleFeature>Copyright © 1996–2019 Geotools. All rights reserved.