Package org.geotools.data.sort
Class SortedFeatureIterator
- Object
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- SortedFeatureIterator
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- All Implemented Interfaces:
Closeable
,AutoCloseable
,SimpleFeatureIterator
,FeatureIterator<SimpleFeature>
public class SortedFeatureIterator extends Object implements SimpleFeatureIterator
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Constructor Summary
Constructors Constructor Description SortedFeatureIterator(SimpleFeatureIterator iterator, SimpleFeatureType schema, SortBy[] sortBy, int maxFeatures)
Builds a new sorting feature iterator
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static boolean
canSort(SimpleFeatureType schema, SortBy... sortBy)
Checks if the schema and the sortBy are suitable for merge/sort.void
close()
Closes this iterator and releases any system resources associated with it.boolean
hasNext()
Does another Feature exist in this Iteration.SimpleFeature
next()
Get the next Feature in this iteration.
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Constructor Detail
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SortedFeatureIterator
public SortedFeatureIterator(SimpleFeatureIterator iterator, SimpleFeatureType schema, SortBy[] sortBy, int maxFeatures) throws IOException
Builds a new sorting feature iterator- Parameters:
iterator
- The iterator to be sortedschema
- The iterator schemasortBy
- The sorting directivesmaxFeatures
- The maximum number of features to keep in memory, or a negative number to use the system default- Throws:
IOException
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Method Detail
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canSort
public static final boolean canSort(SimpleFeatureType schema, SortBy... sortBy)
Checks if the schema and the sortBy are suitable for merge/sort. All attributes need to beSerializable
, all sorting attributes need to beComparable
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hasNext
public boolean hasNext()
Description copied from interface:FeatureIterator
Does another Feature exist in this Iteration.Iterator defin: Returns true if the iteration has more elements. (In other words, returns true if next would return an element rather than throwing an exception.)
- Specified by:
hasNext
in interfaceFeatureIterator<SimpleFeature>
- Returns:
- true if more Features exist, false otherwise.
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next
public SimpleFeature next() throws NoSuchElementException
Description copied from interface:FeatureIterator
Get the next Feature in this iteration.- Specified by:
next
in interfaceFeatureIterator<SimpleFeature>
- Returns:
- The next Feature
- Throws:
NoSuchElementException
- If no more Features exist.
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close
public void close()
Description copied from interface:FeatureIterator
Closes this iterator and releases any system resources associated with it.- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Specified by:
close
in interfaceFeatureIterator<SimpleFeature>
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