Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/DescribeCollectionServiceImpl.java @ 284:be842e36ce1c
ISSUE 46: Removed the table header context menu.
flys-client/trunk@1913 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Raimund Renkert <raimund.renkert@intevation.de> |
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date | Thu, 12 May 2011 15:42:37 +0000 |
parents | d01b0d81b92a |
children | ba238f917b94 |
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package de.intevation.flys.client.server; import java.util.ArrayList; import java.util.List; import javax.xml.xpath.XPathConstants; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.w3c.dom.NodeList; import com.google.gwt.user.server.rpc.RemoteServiceServlet; import de.intevation.artifacts.common.ArtifactNamespaceContext; import de.intevation.artifacts.common.utils.ClientProtocolUtils; 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.artifacts.httpclient.http.response.DocumentResponseHandler; import de.intevation.flys.client.shared.exceptions.ServerException; import de.intevation.flys.client.shared.model.Collection; import de.intevation.flys.client.shared.model.CollectionItem; import de.intevation.flys.client.shared.model.DefaultCollection; import de.intevation.flys.client.shared.model.DefaultCollectionItem; import de.intevation.flys.client.shared.model.DefaultFacet; import de.intevation.flys.client.shared.model.DefaultOutputMode; import de.intevation.flys.client.shared.model.ExportMode; import de.intevation.flys.client.shared.model.Facet; import de.intevation.flys.client.shared.model.OutputMode; import de.intevation.flys.client.client.services.DescribeCollectionService; /** * This service implements a method that queries the DESCRIBE document of a * specific collection and returns a Collection object with the information of * the document. * * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a> */ public class DescribeCollectionServiceImpl extends RemoteServiceServlet implements DescribeCollectionService { /** The error message key that is thrown if an error occured while * describe() a Collection.*/ public static final String ERROR_DESCRIBE_COLLECTION = "error_describe_collection"; public static final String XPATH_FACETS = "art:facets/art:facet"; public Collection describe(String uuid, String serverUrl, String locale) throws ServerException { System.out.println("DescribeCollectionServiceImpl.describe"); Document describe = ClientProtocolUtils.newDescribeCollectionDocument( uuid); HttpClient client = new HttpClientImpl(serverUrl, locale); try { Document response = (Document) client.doCollectionAction( describe, uuid, new DocumentResponseHandler()); Collection c = parseCollection(response); if (c == null) { throw new ServerException(ERROR_DESCRIBE_COLLECTION); } return c; } catch (ConnectionException ce) { System.err.println(ce.getLocalizedMessage()); } throw new ServerException(ERROR_DESCRIBE_COLLECTION); } /** * This method takes the DESCRIBE document of the Collections describe() * operation and extracts the information about the collection itself and * the collection items. * * @param description The DESCRIBE document of the Collections describe() * operation. * * @return a Collection with CollectionItems. */ protected Collection parseCollection(Document description) { System.out.println("AddArtifactServiceImpl.parseCollection"); if (description == null) { System.err.println("The DESCRIBE of the Collection is null!"); return null; } String uuid = XMLUtils.xpathString( description, "art:artifact-collection/@art:uuid", ArtifactNamespaceContext.INSTANCE); if (uuid == null || uuid.equals("")) { System.err.println("Found an invalid Collection!"); return null; } Collection c = new DefaultCollection(uuid); NodeList items = (NodeList) XMLUtils.xpath( description, "art:artifact-collection/art:artifacts/art:artifact", XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE); if (items == null || items.getLength() == 0) { System.out.println("No collection item found for this collection."); return c; } int size = items.getLength(); for (int i = 0; i < size; i++) { CollectionItem item = parseCollectionItem(items.item(i)); if (item != null) { c.addItem(item); } } System.out.println( "Found " + c.getItemLength() + " collection items " + "for the Collection '" + c.identifier() + "'."); return c; } /** * This method extracts the CollectionItem from <i>node</i> with its output * modes. The output modes are parsed using the parseOutputModes() method. * * @param node A node that contains information about a CollectionItem. * * @return a CollectionItem. */ protected CollectionItem parseCollectionItem(Node node) { System.out.println("AddArtifactServiceImpl.parseCollectionItem"); if (node == null) { System.err.println("The node for parsing CollectionItem is null!"); return null; } String uuid = XMLUtils.xpathString( node, "@art:uuid", ArtifactNamespaceContext.INSTANCE); String hash = XMLUtils.xpathString( node, "@art:hash", ArtifactNamespaceContext.INSTANCE); if (uuid == null || uuid.equals("")) { System.err.println("Found an invalid CollectionItem!"); } Node outputmodes = (Node) XMLUtils.xpath( node, "art:outputmodes", XPathConstants.NODE, ArtifactNamespaceContext.INSTANCE); List<OutputMode> modes = parseOutputModes(outputmodes); return new DefaultCollectionItem(uuid, hash, modes); } /** * This method extracts the OutputModes available for a specific * CollectionItem and returns them as list. * * @param node The root node of the outputmodes list. * * @return a list of OutputModes. */ protected List<OutputMode> parseOutputModes(Node node) { System.out.println("AddArtifactServiceImpl.parseOutputModes"); if (node == null) { System.err.println("The node for parsing OutputModes is null!"); return null; } NodeList list = (NodeList) XMLUtils.xpath( node, "art:output", XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE); if (list == null || list.getLength() == 0) { System.err.println("No outputmode nodes found!"); return null; } int size = list.getLength(); List<OutputMode> modes = new ArrayList<OutputMode>(size); for (int i = 0; i < size; i++) { Node tmp = list.item(i); String name = XMLUtils.xpathString( tmp, "@art:name", ArtifactNamespaceContext.INSTANCE); String desc = XMLUtils.xpathString( tmp, "@art:description", ArtifactNamespaceContext.INSTANCE); String mime = XMLUtils.xpathString( tmp, "@art:mime-type", ArtifactNamespaceContext.INSTANCE); if (name == null || name.equals("")) { System.err.println("Found an invalid output mode."); continue; } OutputMode outmode = null; List<Facet> fs = extractFacets(tmp); if (name.indexOf("export") > -1) { outmode = new ExportMode(name, desc, mime, fs); } else { outmode = new DefaultOutputMode(name, desc, mime, fs); } modes.add(outmode); } return modes; } protected static List<Facet> extractFacets(Node outmode) { System.out.println("ArtifactDescriptionFactory - extractFacets()"); NodeList facetList = (NodeList) XMLUtils.xpath( outmode, XPATH_FACETS, XPathConstants.NODESET, ArtifactNamespaceContext.INSTANCE); int num = facetList != null ? facetList.getLength() : 0; List<Facet> facets = new ArrayList<Facet>(num); for (int i = 0; i < num; i++) { Node facetNode = facetList.item(i); String name = XMLUtils.xpathString( facetNode, "@art:name", ArtifactNamespaceContext.INSTANCE); if (name != null && name.length() > 0) { facets.add(new DefaultFacet(name)); } } return facets; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :