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ObjectPropertyFeatureWriter
public class PropertyFeatureWriter
Constructor Summary | |
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PropertyFeatureWriter(PropertyDataStore dataStore,
String typeName)
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Method Summary | |
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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()
Wrties the current Feature, must be called before hasNext. |
Methods inherited from class Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public PropertyFeatureWriter(PropertyDataStore dataStore, String typeName) throws IOException
IOException
Method Detail |
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public SimpleFeatureType getFeatureType()
FeatureWriter
getFeatureType
in interface FeatureWriter<SimpleFeatureType,SimpleFeature>
public boolean hasNext() throws IOException
FeatureWriter
Please 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 opperations will allow calls to next,
even when haveNext() returns false
.
hasNext
in interface FeatureWriter<SimpleFeatureType,SimpleFeature>
true
if an additional Feature
is
available.
IOException
- DOCUMENT ME!public SimpleFeature next() throws IOException
FeatureWriter
This 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
- DOCUMENT ME!public void write() throws IOException
FeatureWriter
FeautreWriters 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>
IOException
public void remove() throws IOException
FeatureWriter
FeatureWriters 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 close() throws IOException
FeatureWriter
close
in interface FeatureWriter<SimpleFeatureType,SimpleFeature>
IOException
- if there there are problems releasing underlying resources, or
possibly if close has been called (up to the implementation).
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