001/*
002 * Licensed under the Apache License, Version 2.0 (the "License");
003 * you may not use this file except in compliance with the License.
004 * You may obtain a copy of the License at
005 *
006 *     http://www.apache.org/licenses/LICENSE-2.0
007 *
008 * Unless required by applicable law or agreed to in writing, software
009 * distributed under the License is distributed on an "AS IS" BASIS,
010 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
011 * See the License for the specific language governing permissions and
012 * limitations under the License.
013 */
014package org.gbif.api.util.validators.identifierschemes;
015
016import java.util.Objects;
017import java.util.regex.Matcher;
018import java.util.regex.Pattern;
019
020/** Validator for ISNI numbers. */
021public class IsniValidator implements IdentifierSchemeValidator {
022
023  private static final Pattern ISNI_PATTERN =
024      Pattern.compile(
025          "^(?<prefix>http(?:s)?:\\/\\/isni.org\\/isni\\/)?([\\p{Digit}xX\\p{Pd}\\s]{16,24})$");
026
027  @Override
028  public boolean isValid(String value) {
029    if (value == null || value.isEmpty()) {
030      return false;
031    }
032
033    Matcher matcher = ISNI_PATTERN.matcher(value);
034    if (!matcher.matches()) {
035      return false;
036    }
037
038    String prefixGroup = matcher.group("prefix");
039    String isniNumber = prefixGroup == null ? value : value.substring(prefixGroup.length());
040
041    return Mod112.hasValidChecksumDigit(isniNumber);
042  }
043
044  @Override
045  public String normalize(String value) {
046    Objects.requireNonNull(value, "Identifier value can't be null");
047    return value.trim();
048  }
049}