ingo@147: package de.intevation.flys.collections;
ingo@147: 
ingo@147: import java.util.Date;
ingo@147: 
ingo@147: import javax.xml.xpath.XPathConstants;
ingo@147: 
ingo@147: import org.apache.log4j.Logger;
ingo@147: 
ingo@147: import org.w3c.dom.Document;
ingo@147: import org.w3c.dom.Element;
ingo@147: import org.w3c.dom.Node;
ingo@147: 
ingo@147: import de.intevation.artifacts.Artifact;
ingo@147: import de.intevation.artifacts.ArtifactNamespaceContext;
ingo@147: import de.intevation.artifacts.CallContext;
ingo@147: import de.intevation.artifacts.CollectionItem;
ingo@147: 
ingo@147: import de.intevation.artifacts.common.utils.XMLUtils;
ingo@147: 
ingo@147: import de.intevation.artifactdatabase.DefaultArtifactCollection;
ingo@147: import de.intevation.artifactdatabase.Backend;
ingo@147: import de.intevation.artifactdatabase.Backend.PersistentArtifact;
ingo@147: 
ingo@147: 
ingo@147: /**
ingo@147:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@147:  */
ingo@147: public class FLYSArtifactCollection extends DefaultArtifactCollection {
ingo@147: 
ingo@147:     /** The logger used in this class.*/
ingo@147:     private static Logger log = Logger.getLogger(FLYSArtifactCollection.class);
ingo@147: 
ingo@147: 
ingo@147:     /** Constant XPath that points to the outputmodes of an artifact.*/
ingo@147:     public static final String XPATH_ARTIFACT_OUTPUTMODES =
ingo@147:         "/art:result/art:outputmodes";
ingo@147: 
ingo@147: 
ingo@147:     @Override
ingo@147:     public Document describe(CallContext context) {
ingo@147:         log.debug("FLYSArtifactCollection.describe: " + identifier);
ingo@147: 
ingo@147:         Document doc = XMLUtils.newDocument();
ingo@147: 
ingo@147:         XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
ingo@147:             doc,
ingo@147:             ArtifactNamespaceContext.NAMESPACE_URI,
ingo@147:             ArtifactNamespaceContext.NAMESPACE_PREFIX);
ingo@147: 
ingo@147:         Date creationTime = getCreationTime();
ingo@147:         String creation   = creationTime != null
ingo@147:             ? Long.toString(creationTime.getTime())
ingo@147:             : "";
ingo@147: 
ingo@147:         Element collection = ec.create("artifact-collection");
ingo@147:         Element artifacts  = ec.create("artifacts");
ingo@147: 
ingo@147:         ec.addAttr(collection, "name", getName(), true);
ingo@147:         ec.addAttr(collection, "uuid", identifier(), true);
ingo@147:         ec.addAttr(collection, "creation", creation,  true);
ingo@147: 
ingo@147:         collection.appendChild(artifacts);
ingo@147:         doc.appendChild(collection);
ingo@147: 
ingo@147:         Document attribute = getAttribute();
ingo@147:         if (attribute != null) {
ingo@147:             Node child = attribute.getFirstChild();
ingo@147:             collection.appendChild(doc.importNode(child, true));
ingo@147:         }
ingo@147: 
ingo@147:         Backend backend        = Backend.getInstance();
ingo@147:         CollectionItem[] items = backend.listCollectionArtifacts(identifier());
ingo@147: 
ingo@147:         for (CollectionItem item: items) {
ingo@147:             artifacts.appendChild(
ingo@147:                 buildArtifactNode(item, backend, context, ec));
ingo@147:         }
ingo@147: 
ingo@147:         return doc;
ingo@147:     }
ingo@147: 
ingo@147: 
ingo@147:     protected Element buildArtifactNode(
ingo@147:         CollectionItem          item,
ingo@147:         Backend                 backend,
ingo@147:         CallContext             context,
ingo@147:         XMLUtils.ElementCreator ec)
ingo@147:     {
ingo@147:         String uuid = item.getArtifactIdentifier();
ingo@147: 
ingo@147:         log.debug("Append artifact '"+ uuid +"' to collection description");
ingo@147: 
ingo@156:         PersistentArtifact pArtifact = backend.getArtifact(uuid);
ingo@156:         Artifact artifact            = pArtifact.getArtifact();
ingo@156: 
ingo@147:         Element ci   = ec.create("artifact");
ingo@148:         ec.addAttr(ci, "uuid", uuid, true);
ingo@156:         ec.addAttr(ci, "hash", artifact.hash(), true);
ingo@147: 
ingo@147:         // XXX I am not sure if it works well every time with an empty document
ingo@147:         // in the describe operation of an artifact.
ingo@147:         Document description = artifact.describe(null, context);
ingo@147:         Node outputModes     = (Node) XMLUtils.xpath(
ingo@147:             description,
ingo@147:             XPATH_ARTIFACT_OUTPUTMODES,
ingo@147:             XPathConstants.NODE,
ingo@147:             ArtifactNamespaceContext.INSTANCE);
ingo@147: 
ingo@147:         if (outputModes != null) {
ingo@147:             Document doc = ci.getOwnerDocument();
ingo@147:             ci.appendChild(doc.importNode(outputModes, true));
ingo@147:         }
ingo@147: 
ingo@147:         return ci;
ingo@147:     }
ingo@147: }
ingo@147: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :