com.vividsolutions.jts.operation.relate.EdgeEndBundleStar Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jts Show documentation

The JTS Topology Suite is an API for modelling and manipulating 2-dimensional linear geometry. It provides numerous geometric predicates and functions. JTS conforms to the Simple Features Specification for SQL published by the Open GIS Consortium.

There is a newer version: 1.13

Show newest version




/*
 * 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.operation.relate;

import java.io.PrintStream;
import java.util.*;
import com.vividsolutions.jts.geom.*;
import com.vividsolutions.jts.util.*;
import com.vividsolutions.jts.geomgraph.*;
import com.vividsolutions.jts.util.Assert;

/**
 * An ordered list of {@link EdgeEndBundle}s around a {@link RelateNode}.
 * They are maintained in CCW order (starting with the positive x-axis) around the node
 * for efficient lookup and topology building.
 *
 * @version 1.7
 */
public class EdgeEndBundleStar
  extends EdgeEndStar
{
  /**
   * Creates a new empty EdgeEndBundleStar
   */
  public EdgeEndBundleStar() {
  }

  /**
   * Insert a EdgeEnd in order in the list.
   * If there is an existing EdgeStubBundle which is parallel, the EdgeEnd is
   * added to the bundle.  Otherwise, a new EdgeEndBundle is created
   * to contain the EdgeEnd.
   * 

   */
  public void insert(EdgeEnd e)
  {
    EdgeEndBundle eb = (EdgeEndBundle) edgeMap.get(e);
    if (eb == null) {
      eb = new EdgeEndBundle(e);
      insertEdgeEnd(e, eb);
    }
    else {
      eb.insert(e);
    }
  }

  /**
   * Update the IM with the contribution for the EdgeStubs around the node.
   */
  void updateIM(IntersectionMatrix im)
  {
    for (Iterator it = iterator(); it.hasNext(); ) {
      EdgeEndBundle esb = (EdgeEndBundle) it.next();
      esb.updateIM(im);
    }
  }

}