001/**
002 * Copyright 2015 DuraSpace, Inc.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.fcrepo.kernel.impl.identifiers;
017
018import org.fcrepo.kernel.identifiers.InternalIdentifierConverter;
019
020/**
021 * @author cabeer
022 * @since 10/9/14
023 */
024public class HashConverter extends InternalIdentifierConverter {
025
026    @Override
027    protected String doForward(final String externalId) {
028        final int i = externalId.indexOf('#');
029        if (i >= 0) {
030            return externalId.substring(0, i) + "/#/" + externalId.substring(i + 1).replace("/", "%2F");
031        }
032        return externalId;
033    }
034
035    @Override
036    protected String doBackward(final String internalId) {
037
038        final int i = internalId.indexOf("/#/");
039
040        if (i >= 0) {
041            return internalId.substring(0, i) + "#" + internalId.substring(i + 3).replace("%2F", "/");
042        }
043        return internalId;
044    }
045}