org.geotools.data.sort

Class SortedFeatureIterator

Object

SortedFeatureIterator

All Implemented Interfaces:

Closeable, AutoCloseable, SimpleFeatureIterator, FeatureIterator<SimpleFeature>

public class SortedFeatureIterator
extends Object
implements SimpleFeatureIterator

Constructor Summary

Constructors

Constructor and Description
SortedFeatureIterator(SimpleFeatureIterator iterator, SimpleFeatureType schema, SortBy[] sortBy, int maxFeatures) Builds a new sorting feature iterator

Method Summary

Modifier and Type	Method and 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.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

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 sorted

schema - The iterator schema

sortBy - The sorting directives

maxFeatures - The maximum number of features to keep in memory, or a negative number to use the system default

Throws:

IOException

Method Detail

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 be Serializable, all sorting attributes need to be Comparable

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 interface FeatureIterator<SimpleFeature>

Returns:

true if more Features exist, false otherwise.

next

public SimpleFeature next()
                   throws NoSuchElementException

Description copied from interface: FeatureIterator

Get the next Feature in this iteration.

Specified by:

next in interface FeatureIterator<SimpleFeature>

Returns:

The next Feature

Throws:

NoSuchElementException - If no more Features exist.

close

public void close()

Description copied from interface: FeatureIterator

Closes this iterator and releases any system resources associated with it.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface FeatureIterator<SimpleFeature>