
001/*- 002 * #%L 003 * HAPI FHIR Storage api 004 * %% 005 * Copyright (C) 2014 - 2025 Smile CDR, Inc. 006 * %% 007 * Licensed under the Apache License, Version 2.0 (the "License"); 008 * you may not use this file except in compliance with the License. 009 * You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, software 014 * distributed under the License is distributed on an "AS IS" BASIS, 015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 016 * See the License for the specific language governing permissions and 017 * limitations under the License. 018 * #L% 019 */ 020package ca.uhn.fhir.jpa.util; 021 022import ca.uhn.fhir.jpa.patch.ParsedFhirPath; 023 024public class FhirPathUtils { 025 /** 026 * Turns an invalid FhirPath into a valid one 027 * - 028 * Do not use this for user input; but it can be used for internally parsed paths 029 */ 030 public static String cleansePath(String thePath) { 031 String path = thePath; 032 033 if (path.startsWith("()")) { 034 path = path.substring(2); 035 } 036 037 // remove trailing . 038 while (path.endsWith(".")) { 039 path = path.substring(0, path.length() - 1); 040 } 041 042 // remove preceding . 043 while (path.startsWith(".")) { 044 path = path.substring(1); 045 } 046 047 return path; 048 } 049 050 /** 051 * Determines if the node is a subsetting node 052 * as described by http://hl7.org/fhirpath/N1/#subsetting 053 */ 054 public static boolean isSubsettingNode(ParsedFhirPath.FhirPathNode theNode) { 055 if (theNode.getListIndex() >= 0) { 056 return true; 057 } 058 if (theNode.isFunction()) { 059 String funName = theNode.getValue(); 060 switch (funName) { 061 case "first", "last", "single", "tail", "skip", "take", "exclude", "intersect" -> { 062 return true; 063 } 064 } 065 } 066 return false; 067 } 068}