--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/artifacts/src/main/java/org/dive4elements/artifacts/ArtifactNamespaceContext.java	Thu Apr 25 10:50:31 2013 +0200
@@ -0,0 +1,118 @@
+/*
+ * 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;
+
+import java.util.Iterator;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.ArrayList;
+
+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();
+
+    protected Map<String, String> map;
+
+    /**
+     * The default constructor.
+     */
+    public ArtifactNamespaceContext() {
+        map = new HashMap<String, String>();
+        map.put(
+            XMLConstants.XML_NS_PREFIX, XMLConstants.XML_NS_URI);
+        map.put(
+            XMLConstants.DEFAULT_NS_PREFIX, XMLConstants.DEFAULT_NS_PREFIX);
+        map.put(
+            XMLConstants.XMLNS_ATTRIBUTE, XMLConstants.XMLNS_ATTRIBUTE_NS_URI);
+        map.put(
+            NAMESPACE_PREFIX, NAMESPACE_URI);
+    }
+
+    public void add(String prefix, String uri) {
+        map.put(prefix, uri);
+    }
+
+    /**
+     * @see javax.xml.namespace.NamespaceContext#getNamespaceURI(String)
+     * @param prefix The prefix
+     * @return The corresponing URI
+     */
+    @Override
+    public String getNamespaceURI(String prefix) {
+
+        if (prefix == null) {
+            throw new IllegalArgumentException("Null prefix");
+        }
+
+        String namespace = map.get(prefix);
+
+        return namespace != null ? namespace : XMLConstants.NULL_NS_URI;
+    }
+
+    /**
+     * @see javax.xml.namespace.NamespaceContext#getPrefix(String)
+     * @param uri The URI
+     */
+    @Override
+    public String getPrefix(String uri) {
+
+        if (uri == null) {
+            throw new IllegalArgumentException("Null uri");
+        }
+
+        for (Map.Entry<String, String> entry: map.entrySet()) {
+            if (entry.getValue().equals(uri)) {
+                return entry.getKey();
+            }
+        }
+
+        return XMLConstants.DEFAULT_NS_PREFIX;
+    }
+
+    /**
+     * @see javax.xml.namespace.NamespaceContext#getPrefixes(java.lang.String)
+     * @param uri The URI
+     */
+    @Override
+    public Iterator getPrefixes(String uri) {
+        ArrayList<String> results = new ArrayList<String>();
+        for (Map.Entry<String, String> entry: map.entrySet()) {
+            if (entry.getValue().equals(uri)) {
+                results.add(entry.getKey());
+            }
+        }
+        return results.iterator();
+    }
+}
+// vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :