Mercurial > dive4elements > river
diff flys-client/src/main/java/de/intevation/flys/client/server/ThemeListingServiceImpl.java @ 2540:e75b15818435
Added a style chooser to the style editor to provide predefined styles and
implemented a service to request theme styles.
flys-client/trunk@4471 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Raimund Renkert <raimund.renkert@intevation.de> |
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date | Wed, 23 May 2012 08:59:49 +0000 |
parents | |
children | cd068ff7966d |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/flys-client/src/main/java/de/intevation/flys/client/server/ThemeListingServiceImpl.java Wed May 23 08:59:49 2012 +0000 @@ -0,0 +1,139 @@ +package de.intevation.flys.client.server; + +import java.util.Map; +import java.util.HashMap; + +import javax.xml.xpath.XPathConstants; + +import org.w3c.dom.Document; +import org.w3c.dom.NodeList; +import org.w3c.dom.Element; + +import org.apache.log4j.Logger; + +import com.google.gwt.user.server.rpc.RemoteServiceServlet; + +import de.intevation.artifacts.common.utils.XMLUtils; + +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.Style; +import de.intevation.flys.client.shared.model.StyleSetting; +import de.intevation.flys.client.client.services.ThemeListingService; + + +/** + * This interface provides a method to list themes filtered by name. + * + * @author <a href="mailto:raimund.renkert@intevation.de">Raimund Renkert</a> + */ +public class ThemeListingServiceImpl +extends RemoteServiceServlet +implements ThemeListingService +{ + private static final Logger logger = + Logger.getLogger(ThemeListingServiceImpl.class); + + + private static final String XPATH_THEME_GROUPS = "/themes/themegroup"; + /** The error message key that is thrown if an error occured while reading + * the supported rivers from server.*/ + public static final String ERROR_NO_GROUPS_FOUND = "error_no_groups_found"; + + + public Map<String, Style> list(String locale, String name) + throws ServerException + { + String url = getServletContext().getInitParameter("server-url"); + + Document doc = XMLUtils.newDocument(); + + XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator( + doc, + null, + null); + + Element e = ec.create("theme"); + ec.addAttr(e, "name", name); + doc.appendChild(e); + HttpClient client = new HttpClientImpl(url, locale); + + try { + Document res = client.callService(url, "themelisting", doc); + + NodeList themeGroups = (NodeList) XMLUtils.xpath( + res, + XPATH_THEME_GROUPS, + XPathConstants.NODESET, + null); + + if (themeGroups == null || themeGroups.getLength() == 0) { + throw new ServerException(ERROR_NO_GROUPS_FOUND); + } + + int count = themeGroups.getLength(); + + Map<String, Style> theStyles = new HashMap<String, Style>(count); + + for (int i = 0; i < count; i++) { + Element tmp = (Element)themeGroups.item(i); + + String groupName = tmp.getAttribute("name"); + NodeList theTheme = (NodeList) XMLUtils.xpath( + tmp, + "theme", + XPathConstants.NODESET, + null); + + for (int j = 0; j < theTheme.getLength(); j++) { + Element elem = (Element) theTheme.item(j); + theStyles.put(groupName, getStyle(elem)); + } + } + + return theStyles; + } + catch (ConnectionException ce) { + logger.error(ce, ce); + } + + throw new ServerException(ERROR_NO_GROUPS_FOUND); + } + + + protected Style getStyle (Element element) { + if (!element.getTagName().equals("theme")) { + return null; + } + + NodeList list = element.getElementsByTagName("field"); + Style style = new Style(); + + style.setName (element.getAttribute("name")); + style.setFacet (element.getAttribute("facet")); + + try { + int ndx = Integer.parseInt(element.getAttribute("index")); + style.setIndex (ndx); + } + catch(NumberFormatException nfe) { + return null; + } + + for(int i = 0; i < list.getLength(); i++) { + Element e = (Element) list.item(i); + StyleSetting set = new StyleSetting ( + e.getAttribute("name"), + e.getAttribute("default"), + e.getAttribute("display"), + e.getAttribute("hints"), + e.getAttribute("type")); + style.appendStyleSetting(set); + } + return style; + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :