Merged HEAD (5.1) to 5.1.N (5.1.1)

117474 bhorje: CM-690 virtualization


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/DEV/5.1.N/root@117559 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/virtual/ref/NumericPathHasher.java

@@ -0,0 +1,93 @@
+/* 
+ * Copyright (C) 2005-2015 Alfresco Software Limited.
+ *
+ * This file is part of Alfresco
+ *
+ * Alfresco is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Alfresco is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Alfresco. If not, see http://www.gnu.org/licenses/.
+ */
+
+package org.alfresco.repo.virtual.ref;
+
+import org.apache.commons.lang.StringUtils;
+
+/**
+ * Creates string-pair hashes of single digit element numeric paths.<br>
+ * @see HierarchicalPathHasher
+ */
+public class NumericPathHasher extends HierarchicalPathHasher
+{
+
+    @Override
+    protected String hashSubpath(String subpath)
+    {
+        try
+        {
+            if (subpath.trim().isEmpty())
+            {
+                return null;
+            }
+
+            String[] numericPathElements = subpath.split("/");
+
+            if (numericPathElements == null || numericPathElements.length == 0)
+            {
+                return "0";
+            }
+
+            long lHash = 0;
+
+            for (int i = numericPathElements[0].isEmpty() ? 1 : 0; i < numericPathElements.length; i++)
+            {
+                if (numericPathElements[i].length() == 1)
+                {
+                    long intPathElement = Long.parseLong(numericPathElements[i]);
+                    if (intPathElement > 0)
+                    {
+                        lHash = lHash * 10 + intPathElement;
+                        if (lHash < 0)
+                        {
+                            return null;
+                        }
+                        else
+                        {
+                            continue;
+                        }
+                    }
+                    else
+                    {
+                        return null;
+                    }
+                }
+                else
+                {
+                    return null;
+                }
+            }
+
+            return "" + lHash;
+        }
+        catch (NumberFormatException e)
+        {
+            return null;
+        }
+    }
+
+    @Override
+    protected String lookupSubpathHash(String hash)
+    {
+        String[] digits = hash.split("(?<=.)");
+        return "/" + StringUtils.join(digits,
+                                      '/');
+    }
+}