#region Disclaimer / License
// Copyright (C) 2011, Jackie Ng
// http://trac.osgeo.org/mapguide/wiki/maestro, jumpinjackie@gmail.com
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
#endregion
using System;
using System.Collections.Generic;
using System.Text;
using OSGeo.MapGuide.MaestroAPI.Schema;
using System.IO;
using OSGeo.MapGuide.ObjectModels.Common;
using OSGeo.MapGuide.ObjectModels;
using System.Globalization;
namespace OSGeo.MapGuide.MaestroAPI.SchemaOverrides
{
/// <summary>
/// Represents a directory of raster images in a GDAL configuration document
/// </summary>
public class GdalRasterLocationItem : IFdoSerializable
{
private Dictionary<string, GdalRasterItem> _items = new Dictionary<string, GdalRasterItem>();
/// <summary>
/// Gets or sets the directory
/// </summary>
public string Location { get; set; }
/// <summary>
/// Adds the specified raster image reference
/// </summary>
/// <param name="item"></param>
public void AddItem(GdalRasterItem item)
{
if (!_items.ContainsKey(item.FileName))
_items.Add(item.FileName, item);
else
_items[item.FileName] = item;
}
/// <summary>
/// Calculates the combined extents of all the raster images in this specified location
/// </summary>
/// <returns>null if there are no raster images. Otherwise returns the combined extent</returns>
public IEnvelope CalculateExtents()
{
IEnvelope env = null;
foreach (var item in _items.Values)
{
if (env == null)
env = ObjectFactory.CreateEnvelope(item.MinX, item.MinY, item.MaxX, item.MaxY);
else
env.ExpandToInclude(ObjectFactory.CreateEnvelope(item.MinX, item.MinY, item.MaxX, item.MaxY));
}
return env;
}
/// <summary>
/// Removes the specified raster image reference
/// </summary>
/// <param name="item"></param>
public void RemoveItem(GdalRasterItem item)
{
_items.Remove(item.FileName);
}
/// <summary>
/// Gets all the raster image references in this location
/// </summary>
public GdalRasterItem[] Items { get { return new List<GdalRasterItem>(_items.Values).ToArray(); } }
/// <summary>
/// Writes the current element's content
/// </summary>
/// <param name="doc"></param>
/// <param name="currentNode"></param>
public void WriteXml(System.Xml.XmlDocument doc, System.Xml.XmlNode currentNode)
{
var loc = doc.CreateElement("Location");
var locName = doc.CreateAttribute("name");
locName.Value = this.Location;
loc.Attributes.Append(locName);
foreach (var item in _items.Values)
{
item.WriteXml(doc, loc);
}
currentNode.AppendChild(loc);
}
/// <summary>
/// Set the current element's content from the current XML node
/// </summary>
/// <param name="node"></param>
/// <param name="mgr"></param>
public void ReadXml(System.Xml.XmlNode node, System.Xml.XmlNamespaceManager mgr)
{
if (node.Name != "Location")
throw new Exception("Bad document. Expected element: Location");
var loc = node.Attributes["name"];
this.Location = loc.Value;
foreach (System.Xml.XmlNode item in node.ChildNodes)
{
var raster = new GdalRasterItem();
raster.ReadXml(item, mgr);
AddItem(raster);
}
}
/// <summary>
/// Removes the specified raster image
/// </summary>
/// <param name="fileName"></param>
public void RemoveItem(string fileName)
{
_items.Remove(fileName);
}
}
/// <summary>
/// Represents a raster image location and its extents.
/// </summary>
public class GdalRasterItem : IFdoSerializable
{
/// <summary>
/// Gets or sets the raster image file name
/// </summary>
public string FileName { get; set; }
/// <summary>
/// Gets or sets the minimum X value of this raster extent
/// </summary>
public double MinX { get; set; }
/// <summary>
/// Gets or sets the minimum Y value of this raster extent
/// </summary>
public double MinY { get; set; }
/// <summary>
/// Gets or sets the maximum X value of this raster extent
/// </summary>
public double MaxX { get; set; }
/// <summary>
/// Gets or sets the maximum Y value of this raster extent
/// </summary>
public double MaxY { get; set; }
/// <summary>
/// Writes the current element's content
/// </summary>
/// <param name="doc"></param>
/// <param name="currentNode"></param>
public void WriteXml(System.Xml.XmlDocument doc, System.Xml.XmlNode currentNode)
{
var feat = doc.CreateElement("Feature");
var featName = doc.CreateAttribute("name");
featName.Value = Path.GetFileNameWithoutExtension(this.FileName);
feat.Attributes.Append(featName);
{
var band = doc.CreateElement("Band");
var bandName = doc.CreateAttribute("name");
bandName.Value = "RGB";
var bandNo = doc.CreateAttribute("number");
bandNo.Value = "1";
band.Attributes.Append(bandName);
band.Attributes.Append(bandNo);
{
var img = doc.CreateElement("Image");
var imgFrame = doc.CreateAttribute("frame");
imgFrame.Value = "1";
var imgName = doc.CreateAttribute("name");
imgName.Value = this.FileName;
img.Attributes.Append(imgFrame);
img.Attributes.Append(imgName);
{
var bounds = doc.CreateElement("Bounds");
bounds.InnerXml = string.Format(CultureInfo.InvariantCulture, "<MinX>{0}</MinX><MinY>{1}</MinY><MaxX>{2}</MaxX><MaxY>{3}</MaxY>", this.MinX, this.MinY, this.MaxX, this.MaxY);
img.AppendChild(bounds);
}
band.AppendChild(img);
}
feat.AppendChild(band);
}
currentNode.AppendChild(feat);
}
/// <summary>
/// Set the current element's content from the current XML node
/// </summary>
/// <param name="node"></param>
/// <param name="mgr"></param>
public void ReadXml(System.Xml.XmlNode node, System.Xml.XmlNamespaceManager mgr)
{
if (node.Name != "Feature")
throw new Exception("Bad document. Expected element: Feature");
var band = node.FirstChild;
var image = band.FirstChild;
var bounds = image.FirstChild;
if (band.Name != "Band")
throw new Exception("Bad document. Expected element: Band");
if (image.Name != "Image")
throw new Exception("Bad document. Expected element: Image");
if (bounds.Name != "Bounds")
throw new Exception("Bad document. Expected element: Bounds");
var fileName = image.Attributes["name"];
this.FileName = fileName.Value;
var minx = bounds.ChildNodes[0];
var miny = bounds.ChildNodes[1];
var maxx = bounds.ChildNodes[2];
var maxy = bounds.ChildNodes[3];
if (minx.Name != "MinX")
throw new Exception("Bad document. Expected element: MinX");
if (miny.Name != "MinY")
throw new Exception("Bad document. Expected element: MinY");
if (maxx.Name != "MaxX")
throw new Exception("Bad document. Expected element: MaxX");
if (maxy.Name != "MaxY")
throw new Exception("Bad document. Expected element: MaxY");
this.MinX = Convert.ToDouble(minx.InnerText);
this.MinY = Convert.ToDouble(miny.InnerText);
this.MaxX = Convert.ToDouble(maxx.InnerText);
this.MaxY = Convert.ToDouble(maxy.InnerText);
}
}
}