--- a/ChangeLog	Thu Feb 10 07:40:09 2011 +0000
+++ b/ChangeLog	Wed Feb 16 15:26:38 2011 +0000
@@ -1,3 +1,14 @@
+2011-02-16  Ingo Weinzierl <ingo@intevation.de>
+
+	* artifacts-common/src/main/java/de/intevation/artifacts/common/ArtifactNamespaceContext.java:
+	  New. Added the namespace context here to make it available in clients as
+	  well.
+	
+	* artifacts-common/src/main/java/de/intevation/artifacts/common/utils/ClientProtocolUtils.java:
+	  New. This class provides functions that help working with the artifact
+	  protocol. Currently, there is just a single function to create a new
+	  CREATE document.
+
 2011-02-10  Ingo Weinzierl <ingo@intevation.de>
 
 	* artifacts-common/src/main/resources/de/intevation/artifacts/common/Common.gwt.xml:

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts-common/src/main/java/de/intevation/artifacts/common/ArtifactNamespaceContext.java	Wed Feb 16 15:26:38 2011 +0000
@@ -0,0 +1,90 @@
+/*
+ * 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.common;
+
+import java.util.Iterator;
+
+import javax.xml.XMLConstants;
+
+import javax.xml.namespace.NamespaceContext;
+
+/**
+ * The namespace used in artifact documents.
+ * @author <a href="mailto:sascha.teichmann@intevation">Sascha L. Teichmann</a>
+ */
+public class ArtifactNamespaceContext
+implements   NamespaceContext
+{
+    /**
+     * The URI of the namespace of the artifacts.
+     */
+    public final static String NAMESPACE_URI =
+        "http://www.intevation.de/2009/artifacts";
+
+    /**
+     * The XML prefix for the artifacts namespace.
+     */
+    public final static String NAMESPACE_PREFIX = "art";
+
+    /**
+     * Final instance to be easily used to avoid creation
+     * of instances.
+     */
+    public static final ArtifactNamespaceContext INSTANCE =
+        new ArtifactNamespaceContext();
+
+    /**
+     * The default constructor.
+     */
+    public ArtifactNamespaceContext() {
+    }
+
+    /**
+     * @see javax.xml.namespace.NamespaceContext#getNamespaceURI(String)
+     * @param prefix The prefix
+     * @return The corresponing URI
+     */
+    public String getNamespaceURI(String prefix) {
+
+        if (prefix == null) {
+            throw new NullPointerException("Null prefix");
+        }
+
+        if (NAMESPACE_PREFIX.equals(prefix)) {
+            return NAMESPACE_URI;
+        }
+
+        if ("xml".equals(prefix)) {
+            return XMLConstants.XML_NS_URI;
+        }
+
+        return XMLConstants.NULL_NS_URI;
+    }
+
+    /**
+     * @see javax.xml.namespace.NamespaceContext#getPrefix(String)
+     * @param uri The URI
+     * @return nothing.
+     * @throws java.lang.UnsupportedOperationException
+     */
+    public String getPrefix(String uri) {
+        throw new UnsupportedOperationException();
+    }
+
+    /**
+     * @see javax.xml.namespace.NamespaceContext#getPrefixes(java.lang.String)
+     * @param uri The URI
+     * @return nothing
+     * @throws java.lang.UnsupportedOperationException
+     */
+    public Iterator getPrefixes(String uri) {
+        throw new UnsupportedOperationException();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts-common/src/main/java/de/intevation/artifacts/common/utils/ClientProtocolUtils.java	Wed Feb 16 15:26:38 2011 +0000
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2011 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.common.utils;
+
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+
+import de.intevation.artifacts.common.ArtifactNamespaceContext;
+
+
+/**
+ * This class provides methods that help creating the artifact protocol
+ * documents DESCRIBE, FEED, ADVANCE and OUT.
+ *
+ * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
+ */
+public class ClientProtocolUtils {
+
+    /**
+     * It should not be necessary to create instances of this class.
+     */
+    private ClientProtocolUtils() {
+    }
+
+
+    /**
+     * This method creates a new CREATE document.
+     *
+     * @return the CREATE document.
+     */
+    public static Document newCreateDocument(String factory) {
+        Document doc = XMLUtils.newDocument();
+
+        XMLUtils.ElementCreator cr = new XMLUtils.ElementCreator(
+            doc,
+            ArtifactNamespaceContext.NAMESPACE_URI,
+            ArtifactNamespaceContext.NAMESPACE_PREFIX);
+
+        Element action = cr.create("action");
+        Element type   = cr.create("type");
+        Element fac    = cr.create("factory");
+
+        type.setAttribute("name", "create");
+        fac.setAttribute("name", factory);
+
+        action.appendChild(type);
+        action.appendChild(fac);
+
+        doc.appendChild(action);
+
+        return doc;
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :