PackedCoordinateSequenceFactory.java

/*
 * Copyright (c) 2016 Vivid Solutions.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * and Eclipse Distribution License v. 1.0 which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 *
 * http://www.eclipse.org/org/documents/edl-v10.php.
 */
package org.locationtech.jts.geom.impl;

import org.locationtech.jts.geom.Coordinate;
import org.locationtech.jts.geom.CoordinateSequence;
import org.locationtech.jts.geom.CoordinateSequenceFactory;

/**
 * Builds packed array coordinate sequences. The array data type can be either
 * double or float, and defaults to float.
 */
public class PackedCoordinateSequenceFactory implements
    CoordinateSequenceFactory
{
  public static final int DOUBLE = 0;
  public static final int FLOAT = 1;

  public static final PackedCoordinateSequenceFactory DOUBLE_FACTORY =
      new PackedCoordinateSequenceFactory(DOUBLE);
  public static final PackedCoordinateSequenceFactory FLOAT_FACTORY =
      new PackedCoordinateSequenceFactory(FLOAT);

  private int type = DOUBLE;
  private int dimension = 3;

  /**
   * Creates a new PackedCoordinateSequenceFactory
   * of type DOUBLE.
   */
  public PackedCoordinateSequenceFactory()
  {
    this(DOUBLE);
  }

  /**
   * Creates a new PackedCoordinateSequenceFactory
   * of the given type.
   * Acceptable type values are
   * {@linkplain PackedCoordinateSequenceFactory#Float}or
   * {@linkplain PackedCoordinateSequenceFactory#Double}
   */
  public PackedCoordinateSequenceFactory(int type)
  {
    this(type, 3);
  }
  /**
   * Creates a new PackedCoordinateSequenceFactory
   * of the given type.
   * Acceptable type values are
   * {@linkplain PackedCoordinateSequenceFactory#FLOAT}or
   * {@linkplain PackedCoordinateSequenceFactory#DOUBLE}
   */
  public PackedCoordinateSequenceFactory(int type, int dimension)
  {
    setType(type);
    setDimension(dimension);
  }

  /**
   * Returns the type of packed coordinate sequences this factory builds, either
   * {@linkplain PackedCoordinateSequenceFactory#Float} or
   * {@linkplain PackedCoordinateSequenceFactory#Double}
   */
  public int getType() {
    return type;
  }

  /**
   * Sets the type of packed coordinate sequences this factory builds,
   * acceptable values are {@linkplain PackedCoordinateSequenceFactory#Float}or
   * {@linkplain PackedCoordinateSequenceFactory#Double}
   */
  public void setType(int type) {
    if (type != DOUBLE && type != FLOAT)
      throw new IllegalArgumentException("Unknown type " + type);
    this.type = type;
  }


  public int getDimension() { return dimension; }

  public void setDimension(int dimension) { this.dimension = dimension; }

  /**
   * @see org.locationtech.jts.geom.CoordinateSequenceFactory#create(org.locationtech.jts.geom.Coordinate[])
   */
  public CoordinateSequence create(Coordinate[] coordinates) {
    if (type == DOUBLE) {
      return new PackedCoordinateSequence.Double(coordinates, dimension);
    } else {
      return new PackedCoordinateSequence.Float(coordinates, dimension);
    }
  }

  /**
   * @see org.locationtech.jts.geom.CoordinateSequenceFactory#create(org.locationtech.jts.geom.CoordinateSequence)
   */
  public CoordinateSequence create(CoordinateSequence coordSeq) {
    if (type == DOUBLE) {
      return new PackedCoordinateSequence.Double(coordSeq.toCoordinateArray(), dimension);
    } else {
      return new PackedCoordinateSequence.Float(coordSeq.toCoordinateArray(), dimension);
    }
  }

  /**
   * @see org.locationtech.jts.geom.CoordinateSequenceFactory#create(double[],
   *      int)
   */
  public CoordinateSequence create(double[] packedCoordinates, int dimension) {
    if (type == DOUBLE) {
      return new PackedCoordinateSequence.Double(packedCoordinates, dimension);
    } else {
      return new PackedCoordinateSequence.Float(packedCoordinates, dimension);
    }
  }

  /**
   * @see org.locationtech.jts.geom.CoordinateSequenceFactory#create(float[],
   *      int)
   */
  public CoordinateSequence create(float[] packedCoordinates, int dimension) {
    if (type == DOUBLE) {
      return new PackedCoordinateSequence.Double(packedCoordinates, dimension);
    } else {
      return new PackedCoordinateSequence.Float(packedCoordinates, dimension);
    }
  }

  /**
   * @see org.locationtech.jts.geom.CoordinateSequenceFactory#create(int, int)
   */
  public CoordinateSequence create(int size, int dimension) {
    if (type == DOUBLE) {
      return new PackedCoordinateSequence.Double(size, dimension);
    } else {
      return new PackedCoordinateSequence.Float(size, dimension);
    }
  }
}