Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/GFIServiceImpl.java @ 3822:1083bf2041aa
Tagged 'flys-client' as 2.9.1
flys-client/trunk@5496 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Mon, 17 Sep 2012 13:47:43 +0000 |
parents | 30c7f8f9f1b7 |
children | af2aa716152f |
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package de.intevation.flys.client.server; import java.io.InputStream; import java.io.IOException; import java.net.URL; import java.net.URLConnection; import java.util.ArrayList; import java.util.List; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import org.apache.log4j.Logger; import com.google.gwt.user.server.rpc.RemoteServiceServlet; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.flys.client.shared.exceptions.ServerException; import de.intevation.flys.client.shared.model.AttributedTheme; import de.intevation.flys.client.shared.model.FeatureInfo; import de.intevation.flys.client.shared.model.Theme; import de.intevation.flys.client.client.services.GFIService; /** * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class GFIServiceImpl extends RemoteServiceServlet implements GFIService { public static final String ERR_NO_VALID_GFI_URL = "error_no_valid_gfi_url"; public static final String ERR_GFI_REQUEST_FAILED = "error_gfi_req_failed"; public static final String ERR_PARSING_RESPONSE_FAILED = "error_gfi_parsing_failed"; private static final Logger logger = Logger.getLogger(GFIServiceImpl.class); /** * @param themes * @param format * @param bbox * @param height * @param width * @param x * @param y * * @return */ public List<FeatureInfo> query( List<Theme> themes, String format, String bbox, String projection, int height, int width, int x, int y ) throws ServerException { logger.info("GFIServiceImpl.query"); String path = createGetFeautureInfoURL( themes, format, bbox, projection, height, width, x, y); logger.debug("URL=" + path); try { URL url = new URL(path); URLConnection conn = url.openConnection(); conn.connect(); InputStream is = conn.getInputStream(); return parseResponse(is); } catch (IOException ioe) { logger.warn(ioe, ioe); } throw new ServerException(ERR_GFI_REQUEST_FAILED); } /** * @param map * @param themes * @param format * @param x * @param y * * @return */ protected String createGetFeautureInfoURL( List<Theme> themes, String infoFormat, String bbox, String projection, int height, int width, int x, int y ) throws ServerException { String url = getUrl(themes); if (url == null || url.length() == 0) { throw new ServerException(ERR_NO_VALID_GFI_URL); } String layers = createLayersString(themes); StringBuilder sb = new StringBuilder(); sb.append(url); if (url.indexOf("?") < 0) { sb.append("?SERVICE=WMS"); } else { sb.append("&SERVICE=WMS"); } sb.append("&VERSION=1.1.1"); sb.append("&REQUEST=GetFeatureInfo"); sb.append("&LAYERS=" + layers); sb.append("&QUERY_LAYERS=" + layers); sb.append("&BBOX=" + bbox); sb.append("&HEIGHT=" + height); sb.append("&WIDTH=" + width); sb.append("&FORMAT=image/png"); sb.append("&INFO_FORMAT=" + infoFormat); sb.append("&SRS=" + projection); sb.append("&X=" + String.valueOf(x)); sb.append("&Y=" + String.valueOf(y)); return sb.toString(); } protected String getUrl(List<Theme> themes) { for (Theme t: themes) { AttributedTheme attr = (AttributedTheme) t; if (attr.getAttrAsBoolean("queryable")) { return attr.getAttr("url"); } } return null; } protected String createLayersString(List<Theme> themes) { StringBuilder sb = new StringBuilder(); boolean first = true; for (Theme theme: themes) { AttributedTheme layer = (AttributedTheme) theme; if (layer.getAttrAsBoolean("queryable")) { if (!first) { sb.append(","); } sb.append(layer.getAttr("layers")); first = false; } } return sb.toString(); } protected List<FeatureInfo> parseResponse(InputStream is) { logger.debug("GFIServiceImpl.parseResponse"); Document response = XMLUtils.parseDocument(is); List<FeatureInfo> features = new ArrayList<FeatureInfo>(); parseFeatureInfos(response, features); return features; } protected void parseFeatureInfos(Node node, List<FeatureInfo> features) { logger.debug("GFIServiceImpl.parseFeatureInfos"); String name = node.getNodeName(); if (name.endsWith("_layer")) { features.add(parseFeature(node)); return; } NodeList children = node.getChildNodes(); if (children != null && children.getLength() > 0) { for (int i = 0, n = children.getLength(); i < n; i++) { parseFeatureInfos(children.item(i), features); } } } protected FeatureInfo parseFeature(Node node) { logger.debug("GFIServiceImpl.parseFeature"); String layername = node.getNodeName(); FeatureInfo f = new FeatureInfo(layername); NodeList children = node.getChildNodes(); int numChildren = children != null ? children.getLength() : 0; logger.debug("Feature '" + layername + "' has " + numChildren + " nodes."); for (int i = 0; i < numChildren; i++) { Node tmp = children.item(i); String nodeName = tmp.getNodeName(); logger.debug(" node name: '" + nodeName + "'"); if (nodeName.equals("gml:name")) { logger.debug("NAME node has child: " + tmp.getFirstChild().getNodeValue()); f.setLayername(tmp.getFirstChild().getNodeValue()); } else if (nodeName.endsWith("_feature")) { parseFeatureAttributes(tmp, f); } } return f; } protected void parseFeatureAttributes(Node node, FeatureInfo f) { logger.debug("GFIServiceImpl.parseFeatureAttributes"); NodeList children = node.getChildNodes(); int numChildren = children != null ? children.getLength() : 0; logger.debug("Has " + numChildren + " attributes."); for (int i = 0; i < numChildren; i++) { Node tmp = children.item(i); String name = tmp.getNodeName(); logger.debug(" tmp attribute name: '" + name + "'"); if (name.equals("gml:boundedBy")) { // TODO } else { Node child = tmp.getFirstChild(); if (child != null) { f.addAttr(name, child.getNodeValue()); } } } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :