/*
* Copyright (C) 2009 Camptocamp
*
* This file is part of MapFish Server
*
* MapFish Server 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 3 of the License, or
* (at your option) any later version.
*
* MapFish Server 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 MapFish Server. If not, see <http://www.gnu.org/licenses/>.
*/
package org.mapfish.print.map.readers;
import org.mapfish.print.RenderingContext;
import org.mapfish.print.Transformer;
import org.mapfish.print.map.renderers.TileRenderer;
import org.mapfish.print.utils.PJsonArray;
import org.mapfish.print.utils.PJsonObject;
import org.mapfish.print.utils.DistanceUnit;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.List;
import java.util.Map;
/**
* Support for the protocol talking direclty to a web-accessible ka-Map cache
* generated by the precache2.php script.
*/
public class KaMapCacheMapReader extends TileableMapReader {
private final String map;
private final String group;
private final String units;
private final int metaTileWidth;
private final int metaTileHeight;
private KaMapCacheMapReader(String map, String group, String units, int metaTileWidth, int metaTileHeight, RenderingContext context, PJsonObject params) {
super(context, params);
this.map = map;
this.group = group;
this.units = units;
this.metaTileWidth = metaTileWidth;
this.metaTileHeight = metaTileHeight;
PJsonArray maxExtent = params.getJSONArray("maxExtent");
PJsonArray tileSize = params.getJSONArray("tileSize");
tileCacheLayerInfo = new TileCacheLayerInfo(params.getJSONArray("resolutions"), tileSize.getInt(0), tileSize.getInt(1), maxExtent.getFloat(0), maxExtent.getFloat(1), maxExtent.getFloat(2), maxExtent.getFloat(3), params.getString("extension"));
}
protected TileRenderer.Format getFormat() {
return TileRenderer.Format.BITMAP;
}
protected void addCommonQueryParams(Map<String, List<String>> result, Transformer transformer, String srs, boolean first) {
//not much query params for this protocol...
}
protected URI getTileUri(URI commonUri, Transformer transformer, float minGeoX, float minGeoY, float maxGeoX, float maxGeoY, long w, long h) throws URISyntaxException, UnsupportedEncodingException {
float targetResolution = (maxGeoX - minGeoX) / w;
TileCacheLayerInfo.ResolutionInfo resolution = tileCacheLayerInfo.getNearestResolution(targetResolution);
int tileX = Math.round((minGeoX - tileCacheLayerInfo.getMinX()) / (resolution.value * w));
int tileY = Math.round((minGeoY - tileCacheLayerInfo.getMinY()) / (resolution.value * h));
// scale, calculated from units used
final DistanceUnit unitEnum = DistanceUnit.fromString(units);
if (unitEnum == null) {
throw new RuntimeException("Unknown unit: '" + units + "'");
}
final int scale = context.getConfig().getBestScale(Math.max(
(maxGeoX - minGeoX) / (DistanceUnit.PT.convertTo(w, unitEnum)),
(maxGeoY- minGeoY) / (DistanceUnit.PT.convertTo(h, unitEnum))));
// top & left
double pX = Math.round(minGeoX / resolution.value);
double pY = Math.round(maxGeoY / resolution.value) * -1;
pX = (double)Math.floor(pX / w) * new Double(w);
pY = (double)Math.floor(pY / h) * new Double(h);
int pX4Path = (int)pX;
int pY4Path = (int)pY;
// metaX and metaY
long metaX = (long)Math.floor(pX / w / metaTileWidth) * w * metaTileWidth;
long metaY = (long)Math.floor(pY / h / metaTileHeight) * h * metaTileHeight;
// path builing
StringBuilder path = new StringBuilder();
if (!commonUri.getPath().endsWith("/")) {
path.append('/');
}
path.append(map);
path.append('/').append(scale);
path.append('/').append(group).append("");
path.append("/def");
path.append("/t").append(metaY);
path.append("/l").append(metaX);
path.append("/t").append(pY4Path).append('l').append(pX4Path).append('.').append(tileCacheLayerInfo.getExtension());
return new URI(commonUri.getScheme(), commonUri.getUserInfo(), commonUri.getHost(), commonUri.getPort(), commonUri.getPath() + path.toString(), commonUri.getQuery(), commonUri.getFragment());
}
protected static void create(List<MapReader> target, RenderingContext context, PJsonObject params) {
String map = params.getString("map");
String group = params.getString("group");
int metaTileWidth = params.getInt("metaTileWidth");
int metaTileHeight = params.getInt("metaTileHeight");
String units = context.getGlobalParams().getString("units");
target.add(new KaMapCacheMapReader(map, group, units, metaTileWidth, metaTileHeight, context, params));
}
public boolean testMerge(MapReader other) {
return false;
}
public boolean canMerge(MapReader other) {
return false;
}
public String toString() {
return map;
}
}