Class DiffContentFeatureWriter
- All Implemented Interfaces:
Closeable
,AutoCloseable
,FeatureWriter<SimpleFeatureType,
SimpleFeature>
- Direct Known Subclasses:
WFSFeatureWriter
You will eventually need to write out the differences, later.
The API has been implemented in terms of FeatureReader<SimpleFeatureType, SimpleFeature> to make explicit that no Features are written out by this Class.
- Author:
- Jody Garnett (Refractions Research)
- See Also:
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DiffContentState
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected Diff
protected FeatureReader<SimpleFeatureType,
SimpleFeature> -
Constructor Summary
ConstructorsConstructorDescriptionDiffContentFeatureWriter
(ContentFeatureStore store, Diff diff, FeatureReader<SimpleFeatureType, SimpleFeature> reader) DiffFeatureWriter construction.DiffContentFeatureWriter
(ContentFeatureStore store, Diff diff, FeatureReader<SimpleFeatureType, SimpleFeature> reader, SimpleFeatureBuilder builder) DiffFeatureWriter construction. -
Method Summary
Modifier and TypeMethodDescriptionvoid
close()
Clean up resources associated with this writer.Supplys FeatureTypeFrom readerboolean
hasNext()
Query for more content.next()
Next Feature from reader or new content.void
remove()
Removes current Feature, must be called before hasNext.void
write()
Writes out the current feature.
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Field Details
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reader
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diff
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Constructor Details
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DiffContentFeatureWriter
public DiffContentFeatureWriter(ContentFeatureStore store, Diff diff, FeatureReader<SimpleFeatureType, SimpleFeature> reader) DiffFeatureWriter construction. -
DiffContentFeatureWriter
public DiffContentFeatureWriter(ContentFeatureStore store, Diff diff, FeatureReader<SimpleFeatureType, SimpleFeature> reader, SimpleFeatureBuilder builder) DiffFeatureWriter construction.
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Method Details
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getFeatureType
Supplys FeatureTypeFrom reader- Specified by:
getFeatureType
in interfaceFeatureWriter<SimpleFeatureType,
SimpleFeature> - Returns:
- FeatureType this writer has been configured to create.
- See Also:
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next
Next Feature from reader or new content.- Specified by:
next
in interfaceFeatureWriter<SimpleFeatureType,
SimpleFeature> - Returns:
- Feature from Query, or newly appended Feature
- Throws:
IOException
- if the writer has been closed or an I/O error occurs reading the nextFeature
.- See Also:
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remove
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:
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write
Writes out the current feature.- Specified by:
write
in interfaceFeatureWriter<SimpleFeatureType,
SimpleFeature> - Throws:
IOException
- See Also:
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hasNext
Query for more content.- Specified by:
hasNext
in interfaceFeatureWriter<SimpleFeatureType,
SimpleFeature> - Returns:
true
if an additionalFeature
is available,false
if not.- Throws:
IOException
- if an I/O error occurs.- See Also:
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close
Clean up resources associated with this writer.Diff is not clear()ed as it is assumed that it belongs to a Transaction.State object and may yet be written out.
- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Specified by:
close
in interfaceFeatureWriter<SimpleFeatureType,
SimpleFeature> - Throws:
IOException
- if there there are problems releasing underlying resources, or possibly if close has been called (up to the implementation).- See Also:
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