Class EmptyFeatureWriter
- Object
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- EmptyFeatureWriter
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- All Implemented Interfaces:
Closeable
,AutoCloseable
,FeatureWriter<SimpleFeatureType,SimpleFeature>
public class EmptyFeatureWriter extends Object implements FeatureWriter<SimpleFeatureType,SimpleFeature>
Represents an Empty, Typed, FeatureWriter.- Author:
- Jody Garnett, Refractions Research
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Constructor Summary
Constructors Constructor Description EmptyFeatureWriter(SimpleFeatureType featureType)
An Empty FeatureWriter of the providedfeatureType
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
close()
Cleans up after Empty FeatureWriter.SimpleFeatureType
getFeatureType()
FeatureType this reader has been configured to create.boolean
hasNext()
There is no next Feature.SimpleFeature
next()
Throws NoSuchElementException as this is an Empty FeatureWriter.void
remove()
Removes current Feature, must be called before hasNext.void
write()
Writes the current Feature, must be called before hasNext.
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Constructor Detail
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EmptyFeatureWriter
public EmptyFeatureWriter(SimpleFeatureType featureType)
An Empty FeatureWriter of the providedfeatureType
.
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Method Detail
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getFeatureType
public SimpleFeatureType getFeatureType()
Description copied from interface:FeatureWriter
FeatureType this reader has been configured to create.- Specified by:
getFeatureType
in interfaceFeatureWriter<SimpleFeatureType,SimpleFeature>
- Returns:
- FeatureType this writer has been configured to create.
- See Also:
FeatureWriter.getFeatureType()
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next
public SimpleFeature next() throws NoSuchElementException
Throws NoSuchElementException as this is an Empty FeatureWriter.- Specified by:
next
in interfaceFeatureWriter<SimpleFeatureType,SimpleFeature>
- Returns:
- Does not return
- Throws:
NoSuchElementException
- See Also:
FeatureWriter.next()
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remove
public void remove() throws IOException
Description copied from interface:FeatureWriter
Removes current Feature, must be called before hasNext.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).
- Specified by:
remove
in interfaceFeatureWriter<SimpleFeatureType,SimpleFeature>
- Throws:
IOException
- See Also:
FeatureWriter.remove()
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write
public void write() throws IOException
Description copied from interface:FeatureWriter
Writes the current Feature, must be called before hasNext.FeautreWriters will need to allow FeatureSources of the same typeName to issue a FeatureEvent:
- FeatureEvent.FEATURES_ADDED: when next() has been called with hasNext() equal to
false
. - FeatureEvent.FEATURES_MODIFIED: when next has been called with hasNext() equal to
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().
- Specified by:
write
in interfaceFeatureWriter<SimpleFeatureType,SimpleFeature>
- Throws:
IOException
- See Also:
FeatureWriter.remove()
- FeatureEvent.FEATURES_ADDED: when next() has been called with hasNext() equal to
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hasNext
public boolean hasNext()
There is no next Feature.- Specified by:
hasNext
in interfaceFeatureWriter<SimpleFeatureType,SimpleFeature>
- Returns:
false
- See Also:
FeatureWriter.hasNext()
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close
public void close()
Cleans up after Empty FeatureWriter.- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Specified by:
close
in interfaceFeatureWriter<SimpleFeatureType,SimpleFeature>
- See Also:
FeatureWriter.close()
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