--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/org/dive4elements/artifacts/httpclient/utils/ArtifactProtocolUtils.java	Thu Apr 25 11:14:14 2013 +0200
@@ -0,0 +1,277 @@
+/*
+ * Copyright (c) 2010 by Intevation GmbH
+ *
+ * This program is free software under the LGPL (>=v2.1)
+ * Read the file LGPL.txt coming with the software for details
+ * or visit http://www.gnu.org/licenses/ if it does not exist.
+ */
+package de.intevation.artifacts.httpclient.utils;
+
+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;
+
+import de.intevation.artifacts.httpclient.objects.Artifact;
+import de.intevation.artifacts.httpclient.objects.ArtifactFactory;
+
+public class ArtifactProtocolUtils {
+
+    private static final Logger logger =
+        Logger.getLogger(ArtifactProtocolUtils.class);
+
+
+    public static ArtifactFactory[] extractArtifactFactories(Document doc) {
+        NodeList elements = (NodeList) XMLUtils.getXPath(
+            doc,
+            "/art:result/art:factories/art:factory",
+            XPathConstants.NODESET,
+            ArtifactNamespaceContext.INSTANCE);
+
+        if (elements == null || elements.getLength() == 0) {
+            return null;
+        }
+
+        ArtifactFactory[] facs = new ArtifactFactory[elements.getLength()];
+
+        String uri = ArtifactNamespaceContext.NAMESPACE_URI;
+
+        for (int idx = 0; idx < facs.length; idx++) {
+            Element factory = (Element)elements.item(idx);
+            String desc  = factory.getAttributeNS(uri, "description");
+            String name  = factory.getAttributeNS(uri, "name");
+
+            if (name.length() != 0) {
+                facs[idx] = new ArtifactFactory(name, desc);
+            }
+        }
+
+        return facs;
+    }
+
+
+    public static Document createCreateDocument(String fis) {
+        Document document = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            document,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX
+        );
+
+        Element action = creator.create("action");
+
+        Element type = creator.create("type");
+        type.setAttribute("name", "create");
+
+        Element factory = creator.create("factory");
+        factory.setAttribute("name", fis);
+
+        action.appendChild(type);
+        action.appendChild(factory);
+        document.appendChild(action);
+
+        return document;
+    }
+
+
+    /**
+     * Returns a new artifact defined by uuid and hash values of the document
+     * returned by the artifact server after creating a new artifact.
+     *
+     * @param document Contains information about the server-side created
+     * artifact.
+     * @return a new artifact object.
+     */
+    public static Artifact extractArtifact(Document document) {
+        String uuid = XMLUtils.getStringXPath(
+            document,
+            "/art:result/art:uuid/@value");
+
+        String hash = XMLUtils.getStringXPath(
+            document,
+            "/art:result/art:hash/@value");
+
+        logger.info("NEW Artifact: " + uuid + " / " + hash);
+        return new Artifact(uuid, hash);
+    }
+
+
+    private static Element createArtifactAction(
+        XMLUtils.ElementCreator creator,
+        Artifact                artifact,
+        String                  artifactAction)
+    {
+        Element action = creator.create("action");
+
+        Element type = creator.create("type");
+        type.setAttribute("name", artifactAction);
+
+        Element uuid = creator.create("uuid");
+        uuid.setAttribute("value", artifact.getUuid());
+
+        Element hash = creator.create("hash");
+        hash.setAttribute("value", artifact.getHash());
+
+        action.appendChild(type);
+        action.appendChild(uuid);
+        action.appendChild(hash);
+
+        return action;
+    }
+
+
+    public static Document createFeedDocument(Artifact artifact, Map attr) {
+        Document document = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            document,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX
+        );
+
+        Element action = createArtifactAction(creator, artifact, "feed");
+        Element data   = creator.create("data");
+
+        for (Map.Entry<String, Object> entry:
+            ((Map<String, Object>)attr).entrySet()) {
+
+            String key    = entry.getKey();
+            Object values = entry.getValue();
+
+            if (values instanceof Object[]) {
+                appendInputNodes(creator, data, key, (Object[]) values);
+            }
+            else {
+                appendInputNodes(creator, data, key, values);
+            }
+        }
+
+        action.appendChild(data);
+        document.appendChild(action);
+
+        return document;
+    }
+
+
+    private static void appendInputNodes(
+        XMLUtils.ElementCreator creator,
+        Element                 root,
+        String                  key,
+        Object                  value)
+    {
+        Element input = creator.create("input");
+        input.setAttribute("name", key);
+        input.setAttribute("value", (String) value);
+        root.appendChild(input);
+    }
+
+
+    private static void appendInputNodes(
+        XMLUtils.ElementCreator creator,
+        Element                 root,
+        String                  key,
+        Object[]                values)
+    {
+        for (Object value: values) {
+            Element input = creator.create("input");
+            input.setAttribute("name", key);
+            input.setAttribute("value", (String) value);
+            root.appendChild(input);
+        }
+    }
+
+
+    public static Document createDescribeDocument(Artifact art, boolean ui) {
+        Document document = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            document,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX
+        );
+
+        Element action    = createArtifactAction(creator, art, "describe");
+        Element includeUi = creator.create("include-ui");
+        includeUi.setTextContent(String.valueOf(ui));
+
+        action.appendChild(includeUi);
+        document.appendChild(action);
+
+        return document;
+    }
+
+
+    public static Document createAdvanceDocument(Artifact art, String target) {
+        Document document = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            document,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX
+        );
+
+        Element action    = createArtifactAction(creator, art, "advance");
+        Element targetEle = creator.create("target");
+        targetEle.setAttribute("name", target);
+
+        action.appendChild(targetEle);
+        document.appendChild(action);
+
+        return document;
+    }
+
+
+    public static Document createChartDocument(Artifact artifact, Map opts) {
+        Document document = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator creator = new XMLUtils.ElementCreator(
+            document,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX
+        );
+
+        Element action = createArtifactAction(creator, artifact, "out");
+        Element out    = creator.create("out");
+        out.setAttribute("name", "chart");
+
+        Element export = creator.create("export");
+        export.setAttribute("name", "img");
+
+        Element mimetype = creator.create("mime-type");
+        export.setAttribute("value", (String) opts.get("mime-type"));
+
+        Element params = creator.create("params");
+
+        Element width = creator.create("input");
+        width.setAttribute("name", "width");
+        width.setAttribute("value", (String) opts.get("width"));
+
+        Element height = creator.create("input");
+        height.setAttribute("name", "height");
+        height.setAttribute("value", (String) opts.get("height"));
+
+        Element points = creator.create("input");
+        points.setAttribute("name", "points");
+        points.setAttribute("value", (String) opts.get("points"));
+
+        params.appendChild(width);
+        params.appendChild(height);
+        params.appendChild(points);
+
+        out.appendChild(export);
+        out.appendChild(mimetype);
+        out.appendChild(params);
+
+        action.appendChild(out);
+        document.appendChild(action);
+
+        return document;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: