source: josm/src/org/openstreetmap/josm/data/osm/Node.java@ 17

package org.openstreetmap.josm.data.osm;

import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;

import org.openstreetmap.josm.data.GeoPoint;
import org.openstreetmap.josm.data.osm.visitor.Visitor;


/**
 * One node data, consisting of one world coordinate waypoint.
 *
 * @author imi
 */
public class Node extends OsmPrimitive {
        
        /**
         * The coordinates of this node.
         */
        public GeoPoint coor;

        /**
         * The list of line segments, this node is part of.
         */
        transient Collection<LineSegment> parentSegment = new LinkedList<LineSegment>();

        /**
         * Returns a read-only list of all segments this node is in.
         * @return A list of all segments. Readonly.
         */
        public Collection<LineSegment> getParentSegments() {
                return Collections.unmodifiableCollection(parentSegment);
        }

        /**
         * Merge the node given at parameter with this node.
         * All parents of the parameter-node become parents of this node.
         * 
         * The argument node is not changed.
         * 
         * @param node Merge the node to this.
         */
        public void mergeFrom(Node node) {
                parentSegment.addAll(node.parentSegment);
                if (keys == null)
                        keys = node.keys;
                else if (node.keys != null)
                        keys.putAll(node.keys);
        }
        
        /**
         * Return a list only this added.
         */
        @Override
        public Collection<Node> getAllNodes() {
                LinkedList<Node> nodes = new LinkedList<Node>();
                nodes.add(this);
                return nodes;
        }

        @Override
        public void visit(Visitor visitor) {
                visitor.visit(this);
        }
}