Mercurial > dive4elements > river
diff gwt-client/src/main/java/org/dive4elements/river/client/server/ThemeListingServiceImpl.java @ 5838:5aa05a7a34b7
Rename modules to more fitting names.
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Thu, 25 Apr 2013 15:23:37 +0200 |
parents | flys-client/src/main/java/org/dive4elements/river/client/server/ThemeListingServiceImpl.java@821a02bbfb4e |
children | 172338b1407f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gwt-client/src/main/java/org/dive4elements/river/client/server/ThemeListingServiceImpl.java Thu Apr 25 15:23:37 2013 +0200 @@ -0,0 +1,107 @@ +package org.dive4elements.river.client.server; + +import com.google.gwt.user.server.rpc.RemoteServiceServlet; + +import org.dive4elements.artifacts.common.utils.XMLUtils; + +import org.dive4elements.artifacts.httpclient.exceptions.ConnectionException; + +import org.dive4elements.artifacts.httpclient.http.HttpClient; +import org.dive4elements.artifacts.httpclient.http.HttpClientImpl; + +import org.dive4elements.river.client.client.services.ThemeListingService; + +import org.dive4elements.river.client.shared.exceptions.ServerException; + +import org.dive4elements.river.client.shared.model.Style; + +import java.util.HashMap; +import java.util.Map; + +import javax.xml.xpath.XPathConstants; + +import org.apache.log4j.Logger; + +import org.w3c.dom.Document; +import org.w3c.dom.Element; +import org.w3c.dom.NodeList; + +/** + * 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, StyleHelper.getStyle(elem)); + } + } + + return theStyles; + } + catch (ConnectionException ce) { + logger.error(ce, ce); + } + + throw new ServerException(ERROR_NO_GROUPS_FOUND); + } +} +// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :