Moving to root below branch label

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2005 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/service/namespace/DynamicNamespacePrefixResolver.java

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+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the
+ * License.
+ */
+package org.alfresco.service.namespace;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * A delegating namespace prefix resolver which allows local over rides from the
+ * delegate. Allows standard/default prefixes to be available but over ridden as
+ * required.
+ * 
+ * @author andyh
+ * 
+ */
+public class DynamicNamespacePrefixResolver implements NamespaceService
+{
+
+    /**
+     * The delegate
+     */
+    private NamespacePrefixResolver delegate;
+
+    /**
+     * The map uris keyed by prefix
+     */
+    private HashMap<String, String> map = new HashMap<String, String>();
+
+    public DynamicNamespacePrefixResolver(NamespacePrefixResolver delegate)
+    {
+        super();
+        this.delegate = delegate;
+    }
+    
+    public DynamicNamespacePrefixResolver()
+    {
+        this(null);
+    }
+
+    /**
+     * Add prefix to name space mapping override
+     * 
+     * @param prefix
+     * @param uri
+     */
+    public void registerNamespace(String prefix, String uri)
+    {
+        map.put(prefix, uri);
+    }
+
+    /**
+     * Remove a prefix to namespace mapping
+     * 
+     * @param prefix
+     */
+    public void unregisterNamespace(String prefix)
+    {
+        map.remove(prefix);
+    }
+
+    // NameSpacePrefix Resolver
+
+    public String getNamespaceURI(String prefix) throws NamespaceException
+    {
+        String uri = map.get(prefix);
+        if ((uri == null) && (delegate != null))
+        {
+            uri = delegate.getNamespaceURI(prefix);
+        }
+        return uri;
+    }
+
+    public Collection<String> getPrefixes(String namespaceURI) throws NamespaceException
+    {
+        Collection<String> prefixes = new ArrayList<String>();
+        for (String key : map.keySet())
+        {
+            String uri = map.get(key);
+            if ((uri != null) && (uri.equals(namespaceURI)))
+            {
+                prefixes.add(key);
+            }
+        }
+        // Only add if not over ridden here (if identical already added)
+        if (delegate != null)
+        {
+            for (String prefix : delegate.getPrefixes(namespaceURI))
+            {
+                if (!map.containsKey(prefix))
+                {
+                    prefixes.add(prefix);
+                }
+            }
+        }
+        return prefixes;
+    }
+
+    public Collection<String> getPrefixes()
+    {
+       Set<String> prefixes = new HashSet<String>();
+       if(delegate != null)
+       {
+          prefixes.addAll(delegate.getPrefixes());
+       }
+       prefixes.addAll(map.keySet());
+       return prefixes;
+    }
+    
+    public Collection<String> getURIs()
+    {
+       Set<String> uris = new HashSet<String>();
+       if(delegate != null)
+       {
+          uris.addAll(delegate.getURIs());
+       }
+       uris.addAll(map.keySet());
+       return uris;
+    }
+    
+}