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Java Source Code / Java Documentation » GIS » GeoTools 2.4.1 » org.geotools.feature

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Class Diagram

Java Document (Java Doc)

org.geotools.feature .FeatureIndex

FeatureIndex

public interface FeatureIndex extends CollectionListener(Code)

An Index is built up around a FeatureCollection, using one of the attributes in the FeatureCollection as a comparable reference.

An object in a column can be any object, but must either be a java base-type Object (Integer, String, Character, etc.) or implement Comparable.

An Index built on such a column will sort its array of object references using FeatureComparator. Implement this to perform more complex Index building.
author:
   Ray Gallagher
author:
   Ian Schneider
version:
   $Id: FeatureIndex.java 20651 2006-07-21 07:51:54Z jgarnett $

Method Summary
java.util.Collection	find(Object key) Find all the Features within this index using a key. A java.util.Collection containing the matches.
Feature	findFirst(Object key) Find the first Feature using the given key.
java.util.Iterator	getFeatures() Gets an "in order" Iterator of the Features as indexed.

Method Detail

find
java.util.Collection find(Object key) throws IllegalArgumentException(Code)
	Find all the Features within this index using a key. A java.util.Collection containing the matches. May be empty. throws: IllegalArgumentException - If the key is incompatable with this index. Parameters: key - A key to look up the Features with.

findFirst
Feature findFirst(Object key) throws IllegalArgumentException(Code)
	Find the first Feature using the given key. A Feature, or null if none is found. throws: IllegalArgumentException - If the key is incompatable with this index. Parameters: key - A key to look up the Feature with.

getFeatures
java.util.Iterator getFeatures()(Code)
	Gets an "in order" Iterator of the Features as indexed. An Iterator of the Features within this index.

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