/* * #%L * Alfresco Repository * %% * Copyright (C) 2005 - 2016 Alfresco Software Limited * %% * This file is part of the Alfresco software. * If the software was purchased under a paid Alfresco license, the terms of * the paid license agreement will prevail. Otherwise, the software is * provided under the following open source license terms: * * 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 . * #L% */ package org.alfresco.repo.virtual.ref; import org.apache.commons.lang.StringUtils; /** * Creates string-pair hashes of single digit element numeric paths.
* @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, '/'); } }