--- a/gnv/ChangeLog	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/ChangeLog	Wed Mar 17 13:31:38 2010 +0000
@@ -1,3 +1,45 @@
+2010-03-17  Ingo Weinzierl <ingo.weinzierl@intevation.de>
+
+	  Issue208 First steps for exporting artifacts.
+
+	* src/main/java/de/intevation/gnv/artifactdatabase/client/DefaultArtifactDatabaseClient.java,
+	  src/main/java/de/intevation/gnv/artifactdatabase/client/ArtifactDatabaseClient.java:
+	  New method to export an artifact.
+
+	* pom.xml: Added Apache common-fileupload 1.2.1 lib.
+
+	* src/main/java/de/intevation/gnv/action/CommunicationKeys.java: Further
+	  error message key added which is displayed beneath project load/store
+	  buttons if an error occured while these operations.
+
+	* src/main/resources/applicationMessages.properties,
+	  src/main/resources/applicationMessages_en.properties: Added error messages
+	  for errors which occure while loading/storing projects.
+
+	* src/main/webapp/styles/default.css: Added a new style class to adjust
+	  error messages which may occur while loading/storing projects.
+	
+	* src/main/java/de/intevation/gnv/action/StoreAction.java: New controller 
+	  which triggers an artifact export. After pushing the corresponding button,
+	  the artifact is returned as xml document and a file dialog is displayed.
+
+	* src/main/java/de/intevation/gnv/action/LoadAction.java: New controller to
+	  import artifacts which have former been exported. XML documents are
+	  successfully read from fileupload.
+	  TODO: Use these documents to create artifacts. No artifacts are loaded
+	  yet!
+
+	* src/main/java/de/intevation/gnv/util/XMLUtils.java: Added a method to
+	  write documents to a stream.
+
+	* src/main/webapp/WEB-INF/config/struts-config.xml: Added LoadAction and
+	  StoreAction. The controller are available under /gnv/load and /gnv/store.
+
+	* src/main/webapp/WEB-INF/jsp/header.jsp: Removed placeholder string for 
+	  storing/loading the current project state and added buttons to start
+	  an export of the current project's state (the current artifact) or reload 
+	  an artifact from a xml document.
+
 2010-03-16  Ingo Weinzierl <ingo.weinzierl@intevation.de>
 
 	* src/main/webapp/WEB-INF/config/templates/describe-ui.xsl: Changed the

--- a/gnv/pom.xml	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/pom.xml	Wed Mar 17 13:31:38 2010 +0000
@@ -18,6 +18,11 @@
     </repository>
   </repositories>
   <dependencies>
+  <dependency>
+      <groupId>commons-fileupload</groupId>
+      <artifactId>commons-fileupload</artifactId>
+      <version>1.2.1</version>
+    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>

--- a/gnv/src/main/java/de/intevation/gnv/action/CommunicationKeys.java	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/action/CommunicationKeys.java	Wed Mar 17 13:31:38 2010 +0000
@@ -13,4 +13,5 @@
     public final static String REQUEST_EXCEPTION_INPUT_ID   = "request_exception_input_id";
     public final static String REQUEST_EXCEPTION_MESSAGE    = "request_exception_message";
     public final static String REQUEST_EXCEPTION_VALUE      = "request_exception_value";
+    public final static String REQUEST_EXCEPTION_PROJECT    = "request_exception_project";
 }

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/action/LoadAction.java	Wed Mar 17 13:31:38 2010 +0000
@@ -0,0 +1,77 @@
+package de.intevation.gnv.action;
+
+import de.intevation.gnv.propertiesreader.PropertiesReaderFactory;
+import de.intevation.gnv.propertiesreader.PropertiesReader;
+import de.intevation.gnv.util.XMLUtils;
+
+import java.io.InputStream;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.fileupload.FileItemIterator;
+import org.apache.commons.fileupload.FileItemStream;
+import org.apache.commons.fileupload.servlet.ServletFileUpload;
+
+import org.apache.log4j.Logger;
+
+import org.apache.struts.action.ActionForm;
+import org.apache.struts.action.ActionForward;
+import org.apache.struts.action.ActionMapping;        
+
+import org.w3c.dom.Document;
+
+/**
+ * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
+ */
+public class LoadAction extends ArtifactDatabaseActionBase {
+
+    public static final String RESOURCE_UPLOAD_FAILURE = "upload.failure";
+
+    private static Logger logger = Logger.getLogger(LoadAction.class);
+
+    public LoadAction() {
+        super();
+    }
+
+    public ActionForward execute(
+        ActionMapping       mapping,
+        ActionForm          form,
+        HttpServletRequest  request,
+        HttpServletResponse response)
+    throws Exception
+    {
+        logger.info("Import artifact.");
+
+        ServletFileUpload upload  = new ServletFileUpload();
+        Document artifactDocument = null;
+
+        FileItemIterator iter = upload.getItemIterator(request);
+        while (iter.hasNext()) {
+            FileItemStream item = (FileItemStream) iter.next();
+            String name         = item.getFieldName();
+
+            if (name.equals("document")) {
+                InputStream stream = item.openStream();
+                artifactDocument   = XMLUtils.readDocument(stream);
+            }
+        }
+
+        // no document found or not valid
+        if (artifactDocument == null) {
+            logger.error("Upload failure: No document found or invalid.");
+
+            request.setAttribute(
+                CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
+                RESOURCE_UPLOAD_FAILURE);
+
+            return super.getExceptionForward(mapping);
+        }
+
+        // TODO Do something with our nice xml document
+        // Use DescribeUI Action to set required attributes which are parsed in
+        // jsp files.
+        return super.execute(mapping, form, request, response);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/action/StoreAction.java	Wed Mar 17 13:31:38 2010 +0000
@@ -0,0 +1,87 @@
+package de.intevation.gnv.action;
+
+import de.intevation.gnv.action.sessionmodel.SessionModel;
+import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
+
+import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClient;
+import de.intevation.gnv.artifactdatabase.client.ArtifactDatabaseClientFactory;
+
+import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
+
+import java.io.OutputStream;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.log4j.Logger;
+
+import org.apache.struts.action.ActionForm;
+import org.apache.struts.action.ActionForward;
+import org.apache.struts.action.ActionMapping;
+
+/**
+ * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
+ */
+public class StoreAction extends ArtifactDatabaseActionBase {
+
+    public static final String RESOURCE_DOWNLOAD_FAILURE = "no.artifact.chosen";
+
+    private static Logger logger = Logger.getLogger(StoreAction.class);
+
+    public StoreAction() {
+        super();
+    }
+
+    public ActionForward execute(
+        ActionMapping       mapping,
+        ActionForm          form,
+        HttpServletRequest  request,
+        HttpServletResponse response)
+    throws Exception
+    {
+        SessionModelFactory sf = SessionModelFactory.getInstance();
+        SessionModel        sm = sf.getSessionModel(request);
+
+        ArtifactDatabaseClientFactory adcf =
+            ArtifactDatabaseClientFactory.getInstance();
+        ArtifactDatabaseClient adc =
+            adcf.getArtifactDatabaseClient(getLocale(request));
+        ArtifactObject artifact = sm.getCurrentArtifact();
+
+        // no artifact set at the moment (which means, the user didn't select a
+        // fis yet.
+        if (artifact == null) {
+            logger.warn("No artifact/fis selected yet.");
+
+            request.setAttribute(
+                CommunicationKeys.REQUEST_EXCEPTION_PROJECT,
+                RESOURCE_DOWNLOAD_FAILURE);
+
+            return super.execute(mapping, form, request, response);
+        }
+
+        logger.info("Export artifact " + artifact.getId());
+        setHeaders(response, artifact.getId());
+
+        OutputStream out = response.getOutputStream();
+        adc.doExport(
+            sm.getSelectedArtifactFactory(),
+            artifact,
+            out);
+
+        out.flush();
+        out.close();
+
+        return null;
+    }
+
+    protected void setHeaders(HttpServletResponse response, String uuid) {
+        String filename = "GNVArtefakt_" + uuid + ".xml";
+
+        response.setHeader("Content-Type", "application/xml");
+        response.setHeader(
+            "Content-Disposition",
+            "attachment;filename=" + filename);
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :

--- a/gnv/src/main/java/de/intevation/gnv/artifactdatabase/client/ArtifactDatabaseClient.java	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/artifactdatabase/client/ArtifactDatabaseClient.java	Wed Mar 17 13:31:38 2010 +0000
@@ -108,6 +108,13 @@
         Collection<InputParameter> inputParameter)
     throws ArtifactDatabaseClientException;
 
+
+    public void doExport(
+        ArtifactObject artifactFactory,
+        ArtifactObject currentArtifact,
+        OutputStream   out)
+    throws ArtifactDatabaseClientException;
+
     /**
      * @param factory
      * @param artifact

--- a/gnv/src/main/java/de/intevation/gnv/artifactdatabase/client/DefaultArtifactDatabaseClient.java	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/artifactdatabase/client/DefaultArtifactDatabaseClient.java	Wed Mar 17 13:31:38 2010 +0000
@@ -1,6 +1,3 @@
-/**
- *
- */
 package de.intevation.gnv.artifactdatabase.client;
 
 import java.io.IOException;
@@ -55,8 +52,8 @@
 import de.intevation.gnv.util.XMLUtils;
 
 /**
- * @author Tim Englich <tim.englich@intevation.de>
- * 
+ * @author Tim Englich (tim.englich@intevation.de)
+ * @author Ingo Weinzierl (ingo.weinzierl@intevation.de)
  */
 public class DefaultArtifactDatabaseClient implements ArtifactDatabaseClient {
     /**
@@ -724,6 +721,32 @@
         }
     }
 
+
+    public void doExport(
+        ArtifactObject artifactFactory,
+        ArtifactObject currentArtifact,
+        OutputStream   out)
+    throws ArtifactDatabaseClientException
+    {
+        try {
+            //String url = getArtifactUrl(artifactFactory, currentArtifact);
+            String url = ((ArtifactFactory) artifactFactory).getDataBaseUrl();
+            url       += "/export/" + currentArtifact.getId();
+            log.debug("+++++++++++++++++++++++++++++++++++++++++++++++++++++++");
+            log.debug("REQUEST: " + url);
+            Document response = doGetRequest(url);
+
+            XMLUtils.toStream(response, out);
+        }
+        catch (Exception e) {
+            log.debug("THIS IS MY ERROR.");
+            log.error(e, e);
+            throw new ArtifactDatabaseClientException(e);
+        }
+
+    }
+
+
     private Document createOutRequestBody(
         ArtifactObject             currentArtifact,
         String                     target,

--- a/gnv/src/main/java/de/intevation/gnv/util/XMLUtils.java	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/java/de/intevation/gnv/util/XMLUtils.java	Wed Mar 17 13:31:38 2010 +0000
@@ -2,6 +2,7 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.StringBufferInputStream;
 import java.io.StringWriter;
 
@@ -219,5 +220,27 @@
         transformer.transform(source, result);
         return sw.getBuffer().toString();
     }
+
+   public static boolean toStream(Document document, OutputStream out) {
+        try {
+            Transformer transformer =
+                TransformerFactory.newInstance().newTransformer();
+            DOMSource    source = new DOMSource(document);
+            StreamResult result = new StreamResult(out);
+            transformer.transform(source, result);
+            return true;
+        }
+        catch (TransformerConfigurationException tce) {
+            logger.error(tce.getLocalizedMessage(), tce);
+        }
+        catch (TransformerFactoryConfigurationError tfce) {
+            logger.error(tfce.getLocalizedMessage(), tfce);
+        }
+        catch (TransformerException te) {
+            logger.error(te.getLocalizedMessage(), te);
+        }
+
+        return false;
+    } 
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:

--- a/gnv/src/main/resources/applicationMessages.properties	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/resources/applicationMessages.properties	Wed Mar 17 13:31:38 2010 +0000
@@ -102,3 +102,5 @@
 input.is.not.valid.for.this.state=Der von Ihnen eingegebene Wert ist ung\u00fcltig. Bitte versuchen Sie es erneut.
 input.not.a.integer= ist keine g\u00fcltige Ganzzahl. Bitte versuchen Sie es erneut.
 input.not.a.double= ist keine g\u00fcltige Flie\u00dfkommazahl. Bitte versuchen Sie es erneut.
+upload.failure=Beim Hochladen der Datei ist ein Fehler aufgetreten.
+no.artifact.chosen=Es ist noch kein FIS gew\u00e4hlt.

--- a/gnv/src/main/resources/applicationMessages_en.properties	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/resources/applicationMessages_en.properties	Wed Mar 17 13:31:38 2010 +0000
@@ -100,3 +100,5 @@
 input.is.not.valid.for.this.state=You entered an invalid value. Please try again.
 input.not.a.integer= is not a valid integer. Please try again.
 input.not.a.double= is not a valid floating-point number. Please try again.
+upload.failure=An error occured while uploading file.
+no.artifact.chosen=No fis selected yet.

--- a/gnv/src/main/webapp/WEB-INF/config/struts-config.xml	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/webapp/WEB-INF/config/struts-config.xml	Wed Mar 17 13:31:38 2010 +0000
@@ -33,6 +33,28 @@
                 name="success"
                 path="/WEB-INF/jsp/mainlayout.jsp"/>
         </action>
+        <action path="/store"
+                type="de.intevation.gnv.action.StoreAction"
+                scope="request"
+                validate="false">
+           <forward
+                name="success"
+                path="/WEB-INF/jsp/mainlayout.jsp"/>
+           <forward
+                name="failure"
+                path="/WEB-INF/jsp/mainlayout.jsp"/>
+        </action>
+        <action path="/load"
+                type="de.intevation.gnv.action.LoadAction"
+                scope="request"
+                validate="false">
+           <forward
+                name="success"
+                path="/WEB-INF/jsp/mainlayout.jsp"/>
+           <forward
+                name="failure"
+                path="/WEB-INF/jsp/mainlayout.jsp"/>
+        </action>
         <action path="/start" 
                 type="de.intevation.gnv.action.FetchArtifactFactoriesAction"
                 scope="request"
@@ -87,6 +109,12 @@
             <forward
                 name="selectfis"
                 path="/gnv/selectFis.do"/>
+            <forward
+                name="store"
+                path="/gnv/store.do"/>
+            <forward
+                name="load"
+                path="/gnv/load.do"/>
         </action>
         <action path="/out" 
                 type="de.intevation.gnv.action.DoOutputAction"

--- a/gnv/src/main/webapp/WEB-INF/jsp/header.jsp	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/webapp/WEB-INF/jsp/header.jsp	Wed Mar 17 13:31:38 2010 +0000
@@ -9,7 +9,8 @@
     exceptionMessage = (exceptionMessage != null && exceptionMessage.toString().endsWith(".") ? exceptionMessage.toString().substring(0,exceptionMessage.toString().length()-1) : exceptionMessage);
     
     boolean showmapviewercallBody = request.getAttribute("MAPVIEWERCALL") != null;
-    
+
+    String exceptionProject = (String) request.getAttribute(CommunicationKeys.REQUEST_EXCEPTION_PROJECT);
 %>
 <%@page import="de.intevation.gnv.action.CommunicationKeys"%><html:xhtml />
 <!-- Kopfleiste-->
@@ -24,15 +25,26 @@
         </a>
     </h1>
     
-    <div id="project">
-        <label style="font-weight:bold;">
-                 <bean:message key="gnviewer.project.load"/>
-            | 
-                 <bean:message    key="gnviewer.project.save" />
-         </label>
-        <div id="project_load">
+    <div id="project"> 
+        <table>
+            <tr>
+                <td>
+                    <form id="storeProject" action="<%=response.encodeURL("store.do")%>" method="post">
+                        <input type="submit" name="storeProject" value="<bean:message key="gnviewer.project.save"/>"/>
+                    </form>
+                </td>
+                <td>
+                    <form id="loadProject" action="<%=response.encodeURL("load.do")%>" method="post" enctype="multipart/form-data">
+                        <input type="submit" name="loadProject"  value="<bean:message key="gnviewer.project.load"/>"/>
+                        <input type="file"   name="document"     accept="application/xml"/>
+                    </form>
+                </td>
+            </tr>
+        </table>
+        <%if (exceptionProject != null) {%>
+            <div class="projectException"><bean:message key="<%=exceptionProject%>"/></div>
+        <%}%>
             
-        </div>
         <br/>
          <%if (showmapviewercallBody){ %>
             <jsp:include page="includes/display_mapviewercall_inc.jsp" />

--- a/gnv/src/main/webapp/styles/default.css	Tue Mar 16 10:30:13 2010 +0000
+++ b/gnv/src/main/webapp/styles/default.css	Wed Mar 17 13:31:38 2010 +0000
@@ -211,11 +211,19 @@
 	position:absolute;
 	top:27px;	
 	left:10px;
-	width: 400px;
+	width: 500px;
 	text-align: left;
+    font-size: 1.2em;
 	
 }
 
+.projectException {
+    color:       red;
+    font-size:   10px;
+    font-weight: bold;
+    margin:      2px 2px;
+}
+
 #load_error {
     position:absolute;
     top:27px;   
@@ -398,7 +406,7 @@
 }
 
 div#basefilter {
-    margin-top: 30px;
+    margin-top: 50px;
     width: 325px;
 }