/* * The JTS Topology Suite is a collection of Java classes that * implement the fundamental operations required to validate a given * geo-spatial data set to a known topological specification. * * Copyright (C) 2001 Vivid Solutions * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * For more information, contact: * * Vivid Solutions * Suite #1A * 2328 Government Street * Victoria BC V8T 5G5 * Canada * * (250)385-6040 * www.vividsolutions.com */ package com.vividsolutions.jts.planargraph; import java.util.Collection; import java.util.Iterator; import java.util.Map; import java.util.TreeMap; import com.vividsolutions.jts.geom.Coordinate; /** * A map of {@link Node}s, indexed by the coordinate of the node. * * @version 1.7 */ public class NodeMap { private Map nodeMap = new TreeMap(); /** * Constructs a NodeMap without any Nodes. */ public NodeMap() { } /** * Adds a node to the map, replacing any that is already at that location. * @return the added node */ public Node add(Node n) { nodeMap.put(n.getCoordinate(), n); return n; } /** * Removes the Node at the given location, and returns it (or null if no Node was there). */ public Node remove(Coordinate pt) { return (Node) nodeMap.remove(pt); } /** * Returns the Node at the given location, or null if no Node was there. */ public Node find(Coordinate coord) { return (Node) nodeMap.get(coord); } /** * Returns an Iterator over the Nodes in this NodeMap, sorted in ascending order * by angle with the positive x-axis. */ public Iterator iterator() { return nodeMap.values().iterator(); } /** * Returns the Nodes in this NodeMap, sorted in ascending order * by angle with the positive x-axis. */ public Collection values() { return nodeMap.values(); } }