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}