/*
* 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.geom;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
/**
* A list of {@link Coordinate}s, which may be set to prevent repeated
* coordinates from occuring in the list.
*
*
* @version 1.7
*/
public class CoordinateList extends ArrayList {
// With contributions from Markus Schaber [schabios@logi-track.com]
// [Jon Aquino 2004-03-25]
private final static Coordinate[] coordArrayType = new Coordinate[0];
/**
* Constructs a new list without any coordinates
*/
public CoordinateList() {
super();
}
/**
* The basic constructor for a CoordinateArray allows repeated points (i.e
* produces a CoordinateList with exactly the same set of points)
*
* @param coord
* the initial coordinates
*/
public CoordinateList(Coordinate[] coord) {
add(coord, true);
}
/**
* Constructs a new list from an array of Coordinates, allowing caller to
* specify if repeated points are to be removed.
*
* @param coord
* the array of coordinates to load into the list
* @param allowRepeated
* if <code>false</code>, repeated points are removed
*/
public CoordinateList(Coordinate[] coord, boolean allowRepeated) {
add(coord, allowRepeated);
}
public Coordinate getCoordinate(int i) {
return (Coordinate) get(i);
}
/**
* Add an array of coordinates
*
* @param coord
* The coordinates
* @param allowRepeated
* if set to false, repeated coordinates are collapsed
* @param direction
* if false, the array is added in reverse order
* @return true (as by general collection contract)
*/
public boolean add(Coordinate[] coord, boolean allowRepeated,
boolean direction) {
if (direction) {
for (int i = 0; i < coord.length; i++) {
add(coord[i], allowRepeated);
}
} else {
for (int i = coord.length - 1; i >= 0; i--) {
add(coord[i], allowRepeated);
}
}
return true;
}
/**
* Add an array of coordinates
*
* @param coord
* The coordinates
* @param allowRepeated
* if set to false, repeated coordinates are collapsed
* @return true (as by general collection contract)
*/
public boolean add(Coordinate[] coord, boolean allowRepeated) {
add(coord, allowRepeated, true);
return true;
}
/**
* Add a coordinate
*
* @param obj
* The coordinate to add
* @param allowRepeated
* if set to false, repeated coordinates are collapsed
* @return true (as by general collection contract)
*/
public boolean add(Object obj, boolean allowRepeated) {
add((Coordinate) obj, allowRepeated);
return true;
}
/**
* Add a coordinate
*
* @param coord
* The coordinates
* @param allowRepeated
* if set to false, repeated coordinates are collapsed
*/
public void add(Coordinate coord, boolean allowRepeated) {
// don't add duplicate coordinates
if (!allowRepeated) {
if (size() >= 1) {
Coordinate last = (Coordinate) get(size() - 1);
if (last.equals2D(coord))
return;
}
}
super.add(coord);
}
/**
* Add an array of coordinates
*
* @param coll
* The coordinates
* @param allowRepeated
* if set to false, repeated coordinates are collapsed
* @return true (as by general collection contract)
*/
public boolean addAll(Collection coll, boolean allowRepeated) {
boolean isChanged = false;
for (Iterator i = coll.iterator(); i.hasNext();) {
add((Coordinate) i.next(), allowRepeated);
isChanged = true;
}
return isChanged;
}
/**
* Ensure this coordList is a ring, by adding the start point if necessary
*/
public void closeRing() {
if (size() > 0)
add(get(0), false);
}
/**
* Returns the Coordinates in this collection.
*
* @return the coordinates
*/
public Coordinate[] toCoordinateArray() {
return (Coordinate[]) toArray(coordArrayType);
}
/**
* Returns a deep copy of this <tt>CoordinateList</tt> instance.
*
* @return a clone of this <tt>CoordinateList</tt> instance
*/
public Object clone() {
CoordinateList clone = (CoordinateList) super.clone();
for (int i = 0; i < this.size(); i++) {
clone.add(i, ((Coordinate) this.get(i)).clone());
}
return clone;
}
}