/* Copyright (c) 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package com.google.gdata.data.geo.impl;

import com.google.gdata.data.ExtensionDescription;
import com.google.gdata.data.geo.Namespaces;
import com.google.gdata.data.geo.Point;

/**
 * A GML Coordinate which is just a space-separated pair of lat/lon.
 * <gml:pos>45.256 -71.92</gml:pos>
 *
 * 
 */
public class GmlPos extends PointConstruct {

  static final String NAME = "pos";

  /**
   * Constructs an empty gml:pos element.
   */
  public GmlPos() {
    super(Namespaces.GML_NAMESPACE, NAME);
  }

  /**
   * Constructs a gml:pos element with the given latitude and longitude.
   */
  public GmlPos(Double lat, Double lon) {
    super(Namespaces.GML_NAMESPACE, NAME, lat, lon);
  }

  /**
   * Constructs a gml:pos element by copying the lat/long values out of the
   * supplied point.  If the point is null then an empy gml:pos will be created.
   */
  public GmlPos(Point copyFrom) {
    super(Namespaces.GML_NAMESPACE, NAME, copyFrom);
  }

  /**
   * Returns the suggested extension description with configurable
   * repeatability.
   */
  public static ExtensionDescription getDefaultDescription(boolean repeatable) {
    ExtensionDescription desc = new ExtensionDescription();
    desc.setExtensionClass(GmlPos.class);
    desc.setNamespace(Namespaces.GML_NAMESPACE);
    desc.setLocalName(NAME);
    desc.setRepeatable(repeatable);
    return desc;
  }

  /**
   * Returns the suggested extension description and is repeatable.
   */
  public static ExtensionDescription getDefaultDescription() {
    return getDefaultDescription(true);
  }
}