# HG changeset patch
# User Ingo Weinzierl <ingo.weinzierl@intevation.de>
# Date 1314092592 0
# Node ID 910b03de6857c078c62dd110bea26bb2ee30c6a7
# Parent  bd56dc762e7faa45176b0a53677eb40334fd55eb
Added a service to get some basic spatial information used for map creation.

flys-client/trunk@2529 c6561f87-3c4e-4783-a992-168aeb5c3f6f

diff -r bd56dc762e7f -r 910b03de6857 flys-client/ChangeLog
--- a/flys-client/ChangeLog	Mon Aug 22 14:38:35 2011 +0000
+++ b/flys-client/ChangeLog	Tue Aug 23 09:43:12 2011 +0000
@@ -1,3 +1,21 @@
+2011-08-23  Ingo Weinzierl <ingo@intevation.de>
+
+	* src/main/java/de/intevation/flys/client/shared/model/MapInfo.java: New.
+	  Instances of this class are used to store basic information which are
+	  necessary to create maps.
+
+	* src/main/java/de/intevation/flys/client/shared/model/BBox.java: New. An
+	  internal representation of a bounding box which consists of four
+	  coordinates.
+
+	* src/main/java/de/intevation/flys/client/client/services/MapInfoServiceAsync.java,
+	  src/main/java/de/intevation/flys/client/client/services/MapInfoService.java,
+	  src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java:
+	  The interface definitions and the implementation of a service that
+	  queries basic map information from artifact server.
+
+	* src/main/webapp/WEB-INF/web.xml: Registered the new MapInfo service.
+
 2011-08-22	Sascha L. Teichmann	<sascha.teichmann@intevation.de> 
 
 	* src/main/java/de/intevation/flys/client/server/MetaDataServiceImpl.java,
diff -r bd56dc762e7f -r 910b03de6857 flys-client/src/main/java/de/intevation/flys/client/client/services/MapInfoService.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/services/MapInfoService.java	Tue Aug 23 09:43:12 2011 +0000
@@ -0,0 +1,19 @@
+package de.intevation.flys.client.client.services;
+
+import com.google.gwt.user.client.rpc.RemoteService;
+import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
+
+import de.intevation.flys.client.shared.exceptions.ServerException;
+import de.intevation.flys.client.shared.model.MapInfo;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+@RemoteServiceRelativePath("map-info")
+public interface MapInfoService extends RemoteService {
+
+    MapInfo getMapInfo(String url, String locale, String river)
+    throws ServerException;
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
diff -r bd56dc762e7f -r 910b03de6857 flys-client/src/main/java/de/intevation/flys/client/client/services/MapInfoServiceAsync.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/client/services/MapInfoServiceAsync.java	Tue Aug 23 09:43:12 2011 +0000
@@ -0,0 +1,19 @@
+package de.intevation.flys.client.client.services;
+
+import com.google.gwt.user.client.rpc.AsyncCallback;
+
+import de.intevation.flys.client.shared.model.MapInfo;
+
+
+/**
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public interface MapInfoServiceAsync {
+
+    public void getMapInfo(
+        String url,
+        String locale,
+        String river,
+        AsyncCallback<MapInfo> callback);
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
diff -r bd56dc762e7f -r 910b03de6857 flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/server/MapInfoServiceImpl.java	Tue Aug 23 09:43:12 2011 +0000
@@ -0,0 +1,124 @@
+package de.intevation.flys.client.server;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import com.google.gwt.user.server.rpc.RemoteServiceServlet;
+
+import de.intevation.artifacts.common.utils.XMLUtils;
+import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
+
+import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
+import de.intevation.artifacts.httpclient.http.HttpClient;
+import de.intevation.artifacts.httpclient.http.HttpClientImpl;
+
+import de.intevation.flys.client.shared.exceptions.ServerException;
+import de.intevation.flys.client.shared.model.BBox;
+import de.intevation.flys.client.shared.model.MapInfo;
+
+import de.intevation.flys.client.client.services.MapInfoService;
+
+
+/**
+ * This service fetches a document that contains meta information for a specific
+ * chart.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class MapInfoServiceImpl
+extends      RemoteServiceServlet
+implements   MapInfoService
+{
+    public static final String XPATH_RIVER =
+        "/mapinfo/river/@name";
+
+    public static final String XPATH_SRID =
+        "/mapinfo/river/srid/@value";
+
+    public static final String XPATH_BBOX  =
+        "/mapinfo/river/bbox/@value";
+
+    public static final String XPATH_RIVER_WMS =
+        "/mapinfo/river/river-wms/@url";
+
+    public static final String XPATH_WMS_URL =
+        "/mapinfo/river/background-wms/@url";
+
+    public static final String XPATH_WMS_LAYERS =
+        "/mapinfo/river/background-wms/@layers";
+
+    public static final String ERROR_NO_MAPINFO_FOUND =
+        "mapinfo_service_no_result";
+
+
+    public MapInfo getMapInfo(String url, String locale, String river)
+    throws ServerException
+    {
+        System.out.println("MapInfoServiceImpl.getMapInfo");
+
+        Document request = getRequestDocument(river);;
+
+        HttpClient client = new HttpClientImpl(url, locale);
+
+        try {
+            System.out.println("MapInfoServiceImpl.callService");
+            Document result = client.callService(url, "mapinfo", request);
+
+            if (result == null) {
+                System.err.println("MapInfo service returned no result.");
+                throw new ServerException(ERROR_NO_MAPINFO_FOUND);
+            }
+
+            return getMapInfo(result);
+        }
+        catch (ConnectionException ce) {
+            System.err.println(ce.getLocalizedMessage());
+        }
+
+        throw new ServerException(ERROR_NO_MAPINFO_FOUND);
+    }
+
+
+    public static Document getRequestDocument(String rivername) {
+        System.out.println("MapInfoServiceImpl.getRequestDocument");
+
+        Document  request = XMLUtils.newDocument();
+        ElementCreator cr = new ElementCreator(request, null, null);
+
+        Element root  = cr.create("mapinfo");
+        Element river = cr.create("river");
+
+        river.setTextContent(rivername);
+
+        request.appendChild(root);
+        root.appendChild(river);
+
+        return request;
+    }
+
+
+    public static MapInfo getMapInfo(Document result) {
+        System.out.println("MapInfoServiceImpl.getMapInfo");
+
+        String river   = XMLUtils.xpathString(result, XPATH_RIVER, null);
+        String sridStr = XMLUtils.xpathString(result, XPATH_SRID, null);
+        String bboxS   = XMLUtils.xpathString(result, XPATH_BBOX,  null);
+        BBox   bbox    = BBox.getBBoxFromString(bboxS);
+
+        String riverWMS  = XMLUtils.xpathString(result, XPATH_RIVER_WMS, null);
+        String wmsURL    = XMLUtils.xpathString(result, XPATH_WMS_URL, null);
+        String wmsLayers = XMLUtils.xpathString(result, XPATH_WMS_LAYERS, null);
+
+        int srid = 4326;
+
+        try {
+            srid = Integer.parseInt(sridStr);
+        }
+        catch (NumberFormatException nfe) {
+            // do nothing
+        }
+
+        return new MapInfo(river, srid, bbox, riverWMS, wmsURL, wmsLayers);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
diff -r bd56dc762e7f -r 910b03de6857 flys-client/src/main/java/de/intevation/flys/client/shared/model/BBox.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/shared/model/BBox.java	Tue Aug 23 09:43:12 2011 +0000
@@ -0,0 +1,74 @@
+package de.intevation.flys.client.shared.model;
+
+import java.io.Serializable;
+
+
+public class BBox implements Serializable {
+
+    public double lowerX;
+    public double upperX;
+    public double lowerY;
+    public double upperY;
+
+
+    public BBox() {
+    }
+
+
+    public BBox(double lowerX, double lowerY, double upperX, double upperY) {
+        this.lowerX = lowerX;
+        this.lowerY = lowerY;
+        this.upperX = upperX;
+        this.upperY = upperY;
+    }
+
+
+    public double getLowerX() {
+        return lowerX;
+    }
+
+
+    public double getLowerY() {
+        return lowerY;
+    }
+
+
+    public double getUpperX() {
+        return upperX;
+    }
+
+
+    public double getUpperY() {
+        return upperY;
+    }
+
+
+    public String toString() {
+        return
+            "(" + lowerX + "," + lowerY + ")" +
+            "(" + upperX + "," + upperY + ")";
+    }
+
+
+    public static BBox getBBoxFromString(String bbox) {
+        String[] coords = bbox != null ? bbox.split(" ") : null;
+
+        if (coords == null || coords.length < 4) {
+            return null;
+        }
+
+        try {
+            return new BBox(
+                Double.parseDouble(coords[0]),
+                Double.parseDouble(coords[1]),
+                Double.parseDouble(coords[2]),
+                Double.parseDouble(coords[3]));
+        }
+        catch (NumberFormatException nfe) {
+            // do nothing here
+        }
+
+        return null;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
diff -r bd56dc762e7f -r 910b03de6857 flys-client/src/main/java/de/intevation/flys/client/shared/model/MapInfo.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/shared/model/MapInfo.java	Tue Aug 23 09:43:12 2011 +0000
@@ -0,0 +1,71 @@
+package de.intevation.flys.client.shared.model;
+
+import java.io.Serializable;
+
+
+public class MapInfo implements Serializable {
+
+    protected String river;
+    protected int    srid;
+    protected BBox   bbox;
+    protected String wmsUrl;
+    protected String backgroundWmsUrl;
+    protected String backgroundWmsLayers;
+
+
+    public MapInfo() {
+    }
+
+
+    public MapInfo(
+        String river,
+        int    srid,
+        BBox   bbox,
+        String wmsUrl,
+        String backgroundWmsUrl,
+        String backgroundWmsLayers)
+    {
+        this.river               = river;
+        this.srid                = srid;
+        this.bbox                = bbox;
+        this.wmsUrl              = wmsUrl;
+        this.backgroundWmsUrl    = backgroundWmsUrl;
+        this.backgroundWmsLayers = backgroundWmsLayers;
+    }
+
+
+    public String getRiver() {
+        return river;
+    }
+
+
+    public int getSrid() {
+        return srid;
+    }
+
+
+    public String getProjection() {
+        return "EPSG:" + srid;
+    }
+
+
+    public BBox getBBox() {
+        return bbox;
+    }
+
+
+    public String getWmsUrl() {
+        return wmsUrl;
+    }
+
+
+    public String getBackgroundWmsUrl() {
+        return backgroundWmsUrl;
+    }
+
+
+    public String getBackgroundWmsLayers() {
+        return backgroundWmsLayers;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
diff -r bd56dc762e7f -r 910b03de6857 flys-client/src/main/webapp/WEB-INF/web.xml
--- a/flys-client/src/main/webapp/WEB-INF/web.xml	Mon Aug 22 14:38:35 2011 +0000
+++ b/flys-client/src/main/webapp/WEB-INF/web.xml	Tue Aug 23 09:43:12 2011 +0000
@@ -237,6 +237,16 @@
     <url-pattern>/flys/delete-collection</url-pattern>
   </servlet-mapping>
 
+  <servlet>
+    <servlet-name>MapInfoService</servlet-name>
+    <servlet-class>de.intevation.flys.client.server.MapInfoServiceImpl</servlet-class>
+  </servlet>
+
+  <servlet-mapping>
+    <servlet-name>MapInfoService</servlet-name>
+    <url-pattern>/flys/map-info</url-pattern>
+  </servlet-mapping>
+
   <!-- Default page to serve -->
   <welcome-file-list>
     <welcome-file>FLYS.html</welcome-file>