001/*
002 * Portions of this software was developed by employees of the National Institute
003 * of Standards and Technology (NIST), an agency of the Federal Government and is
004 * being made available as a public service. Pursuant to title 17 United States
005 * Code Section 105, works of NIST employees are not subject to copyright
006 * protection in the United States. This software may be subject to foreign
007 * copyright. Permission in the United States and in foreign countries, to the
008 * extent that NIST may hold copyright, to use, copy, modify, create derivative
009 * works, and distribute this software and its documentation without fee is hereby
010 * granted on a non-exclusive basis, provided that this notice and disclaimer
011 * of warranty appears in all copies.
012 *
013 * THE SOFTWARE IS PROVIDED 'AS IS' WITHOUT ANY WARRANTY OF ANY KIND, EITHER
014 * EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, ANY WARRANTY
015 * THAT THE SOFTWARE WILL CONFORM TO SPECIFICATIONS, ANY IMPLIED WARRANTIES OF
016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND FREEDOM FROM
017 * INFRINGEMENT, AND ANY WARRANTY THAT THE DOCUMENTATION WILL CONFORM TO THE
018 * SOFTWARE, OR ANY WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE.  IN NO EVENT
019 * SHALL NIST BE LIABLE FOR ANY DAMAGES, INCLUDING, BUT NOT LIMITED TO, DIRECT,
020 * INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM,
021 * OR IN ANY WAY CONNECTED WITH THIS SOFTWARE, WHETHER OR NOT BASED UPON WARRANTY,
022 * CONTRACT, TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY PERSONS OR
023 * PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS SUSTAINED FROM, OR AROSE OUT
024 * OF THE RESULTS OF, OR USE OF, THE SOFTWARE OR SERVICES PROVIDED HEREUNDER.
025 */
026
027package gov.nist.secauto.oscal.lib.profile.resolver.policy;
028
029import gov.nist.secauto.metaschema.model.common.util.ObjectUtils;
030import gov.nist.secauto.oscal.lib.profile.resolver.ProfileResolutionEvaluationException;
031
032import java.util.Objects;
033import java.util.regex.Matcher;
034import java.util.regex.Pattern;
035
036import edu.umd.cs.findbugs.annotations.NonNull;
037
038public class PatternIdentifierParser implements IIdentifierParser {
039  private final Pattern pattern;
040  private final int identifierGroup;
041
042  @SuppressWarnings("null")
043  public PatternIdentifierParser(@NonNull String pattern, int identifierGroup) {
044    this(Pattern.compile(pattern), identifierGroup);
045  }
046
047  public PatternIdentifierParser(@NonNull Pattern pattern, int identifierGroup) {
048    this.pattern = Objects.requireNonNull(pattern, "pattern");
049    this.identifierGroup = identifierGroup;
050  }
051
052  public Pattern getPattern() {
053    return pattern;
054  }
055
056  public int getIdentifierGroup() {
057    return identifierGroup;
058  }
059
060  @Override
061  public String parse(@NonNull String referenceText) {
062    Matcher matcher = getPattern().matcher(referenceText);
063
064    String retval = null;
065    if (matcher.matches()) {
066      retval = matcher.group(getIdentifierGroup());
067    }
068    return retval;
069  }
070
071  @Override
072  public String update(@NonNull String referenceText, @NonNull String newIdentifier) {
073    Matcher matcher = getPattern().matcher(referenceText);
074    if (!matcher.matches()) {
075      throw new ProfileResolutionEvaluationException(
076          String.format("The original reference '%s' did not match the pattern '%s'.",
077              referenceText, getPattern().pattern()));
078    }
079
080    return ObjectUtils.notNull(new StringBuilder(referenceText)
081        .replace(
082            matcher.start(getIdentifierGroup()),
083            matcher.end(getIdentifierGroup()),
084            newIdentifier)
085        .toString());
086  }
087}