# HG changeset patch
# User Sascha L. Teichmann <sascha.teichmann@intevation.de>
# Date 1336411087 0
# Node ID 47d07709ba094ea141df504c6378edcfa7869329
# Parent  87ac5c5325230957663c884d46c6a0f30570927f
Printing: extract layer order and visibility from collections describe.

flys-client/trunk@4353 c6561f87-3c4e-4783-a992-168aeb5c3f6f

diff -r 87ac5c532523 -r 47d07709ba09 flys-client/ChangeLog
--- a/flys-client/ChangeLog	Mon May 07 13:22:43 2012 +0000
+++ b/flys-client/ChangeLog	Mon May 07 17:18:07 2012 +0000
@@ -1,3 +1,10 @@
+2012-05-07	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/client/server/MapPrintServiceImpl.java:
+	  Extract layer order and visibility from the describe document of
+	  the collection. TODO: Generate legend by inserting icon urls to
+	  GETLEGENDGRAPHIC of the layers.
+
 2012-05-07  Raimund Renkert <raimund.renkert@intevation.de>
 
 	First implementation for fixing analysis parameter.
@@ -37,7 +44,7 @@
 2012-05-04	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
 
 	* src/main/java/de/intevation/flys/client/server/MapPrintServiceImpl.java:
-	  Dynamically generate spec from artifact. TODO: Interfere with collecttion.
+	  Dynamically generate spec from artifact. TODO: Interfere with collection.
 
 	* src/main/webapp/WEB-INF/config.yaml: Simplified a bit.
 
diff -r 87ac5c532523 -r 47d07709ba09 flys-client/src/main/java/de/intevation/flys/client/server/MapPrintServiceImpl.java
--- a/flys-client/src/main/java/de/intevation/flys/client/server/MapPrintServiceImpl.java	Mon May 07 13:22:43 2012 +0000
+++ b/flys-client/src/main/java/de/intevation/flys/client/server/MapPrintServiceImpl.java	Mon May 07 17:18:07 2012 +0000
@@ -1,25 +1,5 @@
 package de.intevation.flys.client.server;
 
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.FileOutputStream;
-import java.io.FileInputStream;
-import java.io.BufferedInputStream;
-import java.io.BufferedOutputStream;
-import java.io.OutputStream;
-
-import java.util.List;
-import java.util.Map;
-import java.util.ArrayList;
-import java.util.LinkedHashMap;
-
-import javax.servlet.ServletException;
-
-import javax.servlet.http.HttpServlet;
-import javax.servlet.http.HttpServletRequest;
-import javax.servlet.http.HttpServletResponse;
-
 import de.intevation.artifacts.common.ArtifactNamespaceContext;
 
 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
@@ -32,8 +12,31 @@
 import de.intevation.artifacts.httpclient.http.HttpClient;
 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
 
+import de.intevation.artifacts.httpclient.http.response.DocumentResponseHandler;
+
 import de.intevation.flys.client.shared.model.MapConfig;
 
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.servlet.ServletException;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
 import org.apache.log4j.Logger;
 
 import org.mapfish.print.MapPrinter;
@@ -53,43 +56,107 @@
     private static final Logger log =
         Logger.getLogger(MapPrintServiceImpl.class);
 
-    protected static String generateSpec(
-        Document document,
-        double minX, double minY,
-        double maxX, double maxY
-    ) {
-        System.err.println(XMLUtils.toString(document));
-        MapConfig mapConfig = MapHelper.parseConfig(document);
+    protected static class Layer implements Comparable<Layer> {
 
-        Map<String, Object> spec = new LinkedHashMap<String, Object>();
-        spec.put("layout", "A4 portrait");
-        spec.put("title", "FLYS Druck");
-        spec.put("srs", "EPSG:" + mapConfig.getSrid());
-        spec.put("dpi", Integer.valueOf(254));
-        spec.put("units", "degrees");
-        spec.put("outputFormat", "pdf");
+        protected int    pos;
+        protected String url;
+        protected String layers;
+        protected String description;
 
-        List<Object> layers = new ArrayList<Object>();
-
-        String ns = ArtifactNamespaceContext.NAMESPACE_URI;
+        public Layer() {
+        }
 
-        NodeList facets = document.getElementsByTagNameNS(ns, "facet");
+        public boolean setup(Element element) {
 
-        for (int i = 0, N = facets.getLength(); i < N; ++i) {
-            Element element = (Element)facets.item(i);
-            if (!element.getParentNode().getLocalName().equals("layers")) {
-                continue;
+            Element parent = (Element)element.getParentNode();
+            String parentName = parent.getAttribute("name");
+            if (!(parentName.equals("map") 
+            ||    parentName.equals("floodmap"))) {
+                return false;
             }
+
+            String ns = ArtifactNamespaceContext.NAMESPACE_URI;
+
+            String visible = element.getAttributeNS(ns, "visible");
+            String active  = element.getAttributeNS(ns, "active");
+
+            if (visible.equals("0") || active.equals("0")) {
+                return false;
+            }
+
+            url         = element.getAttributeNS(ns, "url");
+            layers      = element.getAttributeNS(ns, "layers");
+            description = element.getAttributeNS(ns, "description");
+
+            try {
+                pos = Integer.parseInt(element.getAttributeNS(ns, "pos"));
+            }
+            catch (NumberFormatException nfe) {
+                return false;
+            }
+
+            return true;
+        }
+
+        public Map<String, Object> toMap() {
             Map<String, Object> layer = new LinkedHashMap<String, Object>();
 
             layer.put("type", "WMS");
             List<Object> subLayers = new ArrayList<Object>(1);
-            subLayers.add(element.getAttributeNS(ns, "layers"));
+            subLayers.add(layers);
             layer.put("layers", subLayers);
-            layer.put("baseURL", element.getAttributeNS(ns, "url"));
-            layer.put("format", "image/png");
+            layer.put("baseURL", url);
+            layer.put("format", "image/png"); // TODO: Make configurable.
 
-            layers.add(layer);
+            return layer;
+        }
+
+        @Override
+        public int compareTo(Layer other) {
+            int d = pos - other.pos;
+            if (d < 0) return -1;
+            return d > 0 ? +1 : 0;
+        }
+    } // class Layer
+
+    protected static String generateSpec(
+        Document descDocument,
+        Document outDocument,
+        double minX, double minY,
+        double maxX, double maxY
+    ) {
+        MapConfig mapConfig = MapHelper.parseConfig(outDocument);
+
+        Map<String, Object> spec = new LinkedHashMap<String, Object>();
+        spec.put("layout",       "A4 portrait");
+        spec.put("title",        "FLYS Druck");
+        spec.put("srs",          "EPSG:" + mapConfig.getSrid());
+        spec.put("dpi",          Integer.valueOf(254));
+        spec.put("units",        "degrees");
+        spec.put("outputFormat", "pdf");
+
+
+        List<Layer> ls = new ArrayList<Layer>();
+        Layer l = new Layer();
+
+        String ns = ArtifactNamespaceContext.NAMESPACE_URI;
+        NodeList facets = descDocument.getElementsByTagNameNS(ns, "facet");
+
+        for (int i = 0, N = facets.getLength(); i < N; ++i) {
+            Element element = (Element)facets.item(i);
+            if (l.setup(element)) {
+                ls.add(l);
+                l = new Layer();
+            }
+        }
+
+        // Establish Z order.
+        Collections.sort(ls);
+
+        List<Object> layers = new ArrayList<Object>(ls.size());
+
+        for (Layer layer: ls) {
+            layers.add(layer.toMap());
         }
 
         spec.put("layers", layers);
@@ -161,19 +228,31 @@
 
         String url = getURL();
 
-        Document request = ClientProtocolUtils.newOutCollectionDocument(
-            uuid, mapType, mapType);
+        Document requestOut =
+            ClientProtocolUtils.newOutCollectionDocument(
+                uuid, mapType, mapType);
+        Document requestDesc =
+            ClientProtocolUtils.newDescribeCollectionDocument(uuid);
 
-        Document result;
+        Document outDocument;
+        Document descDocument;
+
         try {
             HttpClient client = new HttpClientImpl(url);
-            InputStream    is = client.collectionOut(request, uuid, mapType);
+
+            InputStream is = client.collectionOut(
+                requestOut, uuid, mapType);
+
             try {
-                result = XMLUtils.parseDocument(is);
+                outDocument = XMLUtils.parseDocument(is);
             }
             finally {
                 is.close();
+                is = null;
             }
+
+            descDocument = (Document)client.doCollectionAction(
+                requestDesc, uuid, new DocumentResponseHandler());
         }
         catch (ConnectionException ce) {
             log.error(ce);
@@ -181,7 +260,8 @@
         }
 
         String spec = generateSpec(
-            result,
+            descDocument,
+            outDocument,
             minX, minY,
             maxX, maxY);