Java tutorial
/** * This program 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. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * @author Arne Kepp, The Open Planning Project, Copyright 2008 */ package org.geowebcache.service.kml; import java.io.IOException; import java.util.Hashtable; import java.util.List; import javax.servlet.http.HttpServletResponse; import org.geowebcache.GeoWebCacheException; import org.geowebcache.conveyor.ConveyorTile; import org.geowebcache.grid.BoundingBox; import org.geowebcache.grid.GridSetBroker; import org.geowebcache.grid.GridSubset; import org.geowebcache.grid.GridSubsetFactory; import org.geowebcache.grid.SRS; import org.geowebcache.io.ByteArrayResource; import org.geowebcache.layer.AbstractTileLayer; import org.geowebcache.layer.BadTileException; import org.geowebcache.layer.TileLayer; import org.geowebcache.mime.MimeType; import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; /** * * Creates a grid of tiles and puts the grid index on each of them * */ public class KMLDebugGridLayer extends AbstractTileLayer { public static final String LAYERNAME = "debugGrid"; public static final int IS_KMZ = 100; // private static Log log = // LogFactory.getLog(org.geowebcache.service.kml.KMLDebugGridLayer.class); // This is completely isolated anyway private static GridSetBroker gridSetBroker = new GridSetBroker(false, false); private static KMLDebugGridLayer instance; private KMLDebugGridLayer() { super.subSets = new Hashtable<String, GridSubset>(); subSets.put(gridSetBroker.WORLD_EPSG4326.getName(), GridSubsetFactory.createGridSubSet(gridSetBroker.WORLD_EPSG4326, BoundingBox.WORLD4326, 0, 3)); } synchronized static public KMLDebugGridLayer getInstance() { if (instance == null) { instance = new KMLDebugGridLayer(); } return instance; } public void acquireLayerLock() { } public ConveyorTile doNonMetatilingRequest(ConveyorTile tile) throws GeoWebCacheException { return null; } public BoundingBox getBounds(SRS srs) { return new BoundingBox(-180.0, -90.0, 180.0, 90.0); } public MimeType getDefaultMimeType() { return null; } public int[] getMetaTilingFactors() { return null; } public List<MimeType> getMimeTypes() { return null; } public String getName() { return "Debug grid"; } public SRS[] getProjections() { SRS[] srsList = { SRS.getEPSG4326() }; return srsList; } public double[] getResolutions(int srsIdx) { return null; } public ConveyorTile getTile(ConveyorTile tile) throws GeoWebCacheException, IOException { long[] gridLoc = tile.getTileIndex(); BoundingBox bbox = tile.getGridSubset().boundsFromIndex(gridLoc); String data = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + "<kml xmlns=\"http://earth.google.com/kml/2.1\">\n" + "<Document>\n" // +"<!-- Name>DocumentName</Name --->" + "<Placemark id=\"PlaceMarkId\">\n" // +"<styleUrl>#square</styleUrl>\n" + "<name>" + gridLoc[0] + "," + gridLoc[1] + "," + gridLoc[2] + "</name>" + "<Style id=\"square\">\n" + "<PolyStyle><color>7fffffff</color><colorMode>random</colorMode>\n" + "</PolyStyle>\n" + "<IconStyle><Icon><href>http://icons.opengeo.org/dynamic/circle/aaffaa_aaffaa_2.png</href></Icon></IconStyle>\n" + "<LabelStyle id=\"name\"><color>ffffffff</color><colorMode>normal</colorMode><scale>1.0</scale></LabelStyle>\n" + "</Style>\n" + "<MultiGeometry>\n" + "<Point><coordinates>" + ((bbox.getMinX() + bbox.getMaxX()) / 2) + "," + ((bbox.getMinY() + bbox.getMaxY()) / 2) + ",0</coordinates></Point>\n" + "<Polygon><outerBoundaryIs><LinearRing>\n" + "<coordinates decimal=\".\" cs=\",\" ts=\" \">\n" + bbox.getMinX() + "," + bbox.getMinY() + " " + bbox.getMaxX() + "," + bbox.getMinY() + " " + bbox.getMaxX() + "," + bbox.getMaxY() + " " + bbox.getMinX() + "," + bbox.getMaxY() + "</coordinates>\n" + "</LinearRing></outerBoundaryIs></Polygon>\n" + "</MultiGeometry>\n" + "</Placemark>\n" + "</Document>\n" + "</kml>"; tile.setBlob(new ByteArrayResource(data.getBytes())); tile.setStatus(200); return tile; } public String getStyles() { return null; } public int[][] getZoomInGridLoc(SRS srs, int[] gridLoc) { // log.warn("done - getZoomInGridLoc(srsIdx, gridLoc)"); int[][] retVal = new int[4][3]; int x = gridLoc[0] * 2; int y = gridLoc[1] * 2; int z = gridLoc[2] + 1; // Don't link to tiles past the last zoomLevel if (z > 25) { z = -1; } // Now adjust where appropriate retVal[0][0] = retVal[2][0] = x; retVal[1][0] = retVal[3][0] = x + 1; retVal[0][1] = retVal[1][1] = y; retVal[2][1] = retVal[3][1] = y + 1; retVal[0][2] = retVal[1][2] = retVal[2][2] = retVal[3][2] = z; return retVal; } public int getZoomStart() { return 0; } public int getZoomStop() { return 25; } public boolean initializeInternal(GridSetBroker gridSetBroker) { return true; } public void releaseLayerLock() { } public void setExpirationHeader(HttpServletResponse response, int zoomLevel) { } public String supportsBbox(SRS srs, BoundingBox bounds) throws GeoWebCacheException { return null; } public boolean supportsFormat(String formatStr) throws GeoWebCacheException { return false; } public boolean supportsSRS(SRS srs) throws GeoWebCacheException { return false; } public void setApplicationContext(ApplicationContext arg0) throws BeansException { } // // public Object createKey(Tile tile) { // Vector<Integer> lst = new Vector<Integer>(); // if(tile.getMimeType() == XMLMime.kmz) { // lst.add(KMLDebugGridLayer.IS_KMZ); // } else { // lst.add(0); // } // int[] tileIndex = tile.getTileIndex(); // lst.add(tileIndex[0]); // lst.add(tileIndex[1]); // lst.add(tileIndex[2]); // // return (Object) lst; // } public int getType() { return 0; } public void init() { } public BoundingBox getBboxForGridLoc(SRS srs, int[] gridLoc) { double tileWidth = 180.0 / Math.pow(2, gridLoc[2]); BoundingBox bbox = new BoundingBox(-180.0 + tileWidth * gridLoc[0], -90.0 + tileWidth * gridLoc[1], -180.0 + tileWidth * (gridLoc[0] + 1), -90.0 + tileWidth * (gridLoc[1] + 1)); return bbox; } public int[][] getCoveredGridLevels(SRS srs, BoundingBox bounds) { return null; } public int[] getGridLocForBounds(SRS srs, BoundingBox bounds) throws BadTileException { return null; } public int[] getZoomedOutGridLoc(SRS srs) { // log.warn("done - getZoomedOutGridLoc"); int[] zoomedOutGridLoc = new int[3]; zoomedOutGridLoc[0] = -1; zoomedOutGridLoc[1] = -1; zoomedOutGridLoc[2] = -1; return zoomedOutGridLoc; } @Override public Integer getBackendTimeout() { // TODO Auto-generated method stub return null; } @Override public ConveyorTile getNoncachedTile(ConveyorTile tile) throws GeoWebCacheException { // TODO Auto-generated method stub return null; } @Override public Boolean isCacheBypassAllowed() { // TODO Auto-generated method stub return null; } @Override public void seedTile(ConveyorTile tile, boolean tryCache) throws GeoWebCacheException, IOException { // TODO Auto-generated method stub } @Override public void setBackendTimeout(int seconds) { // TODO Auto-generated method stub } @Override public void setCacheBypassAllowed(boolean allowed) { // TODO Auto-generated method stub } @Override public boolean isEnabled() { return true; } @Override public void setEnabled(boolean enabled) { // TODO Auto-generated method stub } }