001/*
002 * Licensed to DuraSpace under one or more contributor license agreements.
003 * See the NOTICE file distributed with this work for additional information
004 * regarding copyright ownership.
005 *
006 * DuraSpace licenses this file to you under the Apache License,
007 * Version 2.0 (the "License"); you may not use this file except in
008 * compliance with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.fcrepo.kernel.modeshape.utils;
020
021/**
022 * @author Daniel Bernstein
023 * @since Apr 27, 2017
024 */
025public class BNodeSkolemizationUtil {
026
027    private static final String FCREPO_BNODE_SKOLEMIZE_TO_HASH_FLAG = "fcrepo.bnode.hash-uri";
028
029    /**
030     * prevents instantiation
031     */
032    private BNodeSkolemizationUtil() {
033    }
034
035    /**
036     * Returns true if blank nodes should follow the new strategy of skolemizing blank nodes (bnodes) to hash URIs
037     * (rather than using /.well-known/genid/ - c.f. https://jira.duraspace.org/browse/FCREPO-2431).
038     * 
039     * @return true if fcrepo.bnode.hash-uri system property is set to "true"
040     */
041    public static boolean isSkolemizeToHashURIs() {
042        return Boolean.valueOf(System.getProperty(FCREPO_BNODE_SKOLEMIZE_TO_HASH_FLAG, "false"));
043    }
044
045    /**
046     * Sets the fcrepo.bnode.hash-uri system property.
047     * @param flag to toggle this feature
048     */
049    public static void setSkolemizeToHashURIs(final boolean flag) {
050        System.setProperty(FCREPO_BNODE_SKOLEMIZE_TO_HASH_FLAG, Boolean.toString(flag));
051    }
052}