view gwt-client/src/main/java/org/dive4elements/river/client/server/ModuleServiceImpl.java @ 5948:d7b9b3e3c61a

Make instantiation of saml.User easier. Most of the parameters of the constructor can be taken from the Assertion object, so there's no reason to pass them separately. Also, trying to check the validity dates isn't useful for the single sign on case. See comments in the hasExpired method.
author Bernhard Herzog <bh@intevation.de>
date Wed, 08 May 2013 17:56:14 +0200
parents 172338b1407f
children ea9eef426962
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
 * Software engineering by Intevation GmbH
 *
 * This file is Free Software under the GNU AGPL (>=v3) 
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details. 
 */

package org.dive4elements.river.client.server;

import org.dive4elements.artifacts.common.ArtifactNamespaceContext;
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.ModuleService;
import org.dive4elements.river.client.server.auth.User;
import org.dive4elements.river.client.shared.exceptions.ServerException;
import org.dive4elements.river.client.shared.model.DefaultModule;
import org.dive4elements.river.client.shared.model.Module;

import java.util.ArrayList;
import java.util.List;

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;

public class ModuleServiceImpl
extends      RemoteServiceServlet
implements   ModuleService
{
    private static final Logger logger =
        Logger.getLogger(ModuleServiceImpl.class);

    public static final String XPATH_MODULES = "/art:modules/art:module";

    public static final String ERROR_NO_MODULES_FOUND =
        "error_no_module_found";

    @Override
    public Module[] list(String locale) throws ServerException {
        User user = this.getUser();

        logger.info("ModuleService.list");

        String url = getServletContext().getInitParameter("server-url");

        // create dummy xml
        Document doc = XMLUtils.newDocument();

        XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
            doc,
            ArtifactNamespaceContext.NAMESPACE_URI,
            ArtifactNamespaceContext.NAMESPACE_PREFIX);

        Element dummy = ec.create("modules");
        doc.appendChild(dummy);

        HttpClient client = new HttpClientImpl(url, locale);
        try {
            Document result = client.callService(url, "modules", doc);

            NodeList list = (NodeList) XMLUtils.xpath(
                result,
                XPATH_MODULES,
                XPathConstants.NODESET,
                ArtifactNamespaceContext.INSTANCE);

            if (list == null) {
                logger.warn("No modules found.");

                throw new ServerException(ERROR_NO_MODULES_FOUND);
            }

            int num = list.getLength();

            List<Module> modules = new ArrayList<Module>(list.getLength());
            for(int i =0; i < num; i++) {
                Element em = (Element)list.item(i);
                String name = em.getAttributeNS(
                        ArtifactNamespaceContext.NAMESPACE_URI, "name");
                String localname = em.getAttributeNS(
                        ArtifactNamespaceContext.NAMESPACE_URI, "localname");
                String strselected = em.getAttributeNS(
                        ArtifactNamespaceContext.NAMESPACE_URI, "selected");
                boolean selected = strselected == null ? false :
                        strselected.equalsIgnoreCase("true");
                logger.debug("Found module " + name + " " + localname);
                if (user == null || user.canUseFeature("module:" + name)) {
                    modules.add(new DefaultModule(name, localname, selected));
                }
            }
            return modules.toArray(new Module[modules.size()]);
        }
        catch (ConnectionException ce) {
            logger.error(ce, ce);
        }

        throw new ServerException(ERROR_NO_MODULES_FOUND);
    }
}

// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 tw=80 :

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