001package org.hl7.fhir.r4.terminologies; 002 003/* 004 Copyright (c) 2011+, HL7, Inc. 005 All rights reserved. 006 007 Redistribution and use in source and binary forms, with or without modification, 008 are permitted provided that the following conditions are met: 009 010 * Redistributions of source code must retain the above copyright notice, this 011 list of conditions and the following disclaimer. 012 * Redistributions in binary form must reproduce the above copyright notice, 013 this list of conditions and the following disclaimer in the documentation 014 and/or other materials provided with the distribution. 015 * Neither the name of HL7 nor the names of its contributors may be used to 016 endorse or promote products derived from this software without specific 017 prior written permission. 018 019 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 020 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 021 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 022 IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 023 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 024 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 025 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 026 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 027 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 028 POSSIBILITY OF SUCH DAMAGE. 029 030 */ 031 032import org.hl7.fhir.exceptions.FHIRException; 033import org.hl7.fhir.r4.context.SimpleWorkerContext; 034import org.hl7.fhir.r4.model.Coding; 035import org.hl7.fhir.r4.model.ConceptMap; 036import org.hl7.fhir.r4.model.ConceptMap.ConceptMapGroupComponent; 037import org.hl7.fhir.r4.model.ConceptMap.SourceElementComponent; 038import org.hl7.fhir.r4.model.ConceptMap.TargetElementComponent; 039import org.hl7.fhir.r4.model.Enumerations.ConceptMapEquivalence; 040 041public class ConceptMapEngine { 042 043 private SimpleWorkerContext context; 044 045 public ConceptMapEngine(SimpleWorkerContext context) { 046 this.context = context; 047 } 048 049 public Coding translate(Coding source, String url) throws FHIRException { 050 ConceptMap cm = context.fetchResource(ConceptMap.class, url); 051 if (cm == null) 052 throw new FHIRException("Unable to find ConceptMap '" + url + "'"); 053 if (source.hasSystem()) 054 return translateBySystem(cm, source.getSystem(), source.getCode()); 055 else 056 return translateByJustCode(cm, source.getCode()); 057 } 058 059 private Coding translateByJustCode(ConceptMap cm, String code) throws FHIRException { 060 SourceElementComponent ct = null; 061 ConceptMapGroupComponent cg = null; 062 for (ConceptMapGroupComponent g : cm.getGroup()) { 063 for (SourceElementComponent e : g.getElement()) { 064 if (code.equals(e.getCode())) { 065 if (ct != null) 066 throw new FHIRException("Unable to process translate " + code 067 + " because multiple candidate matches were found in concept map " + cm.getUrl()); 068 ct = e; 069 cg = g; 070 } 071 } 072 } 073 if (ct == null) 074 return null; 075 TargetElementComponent tt = null; 076 for (TargetElementComponent t : ct.getTarget()) { 077 if (!t.hasDependsOn() && !t.hasProduct() && isOkEquivalence(t.getEquivalence())) { 078 if (tt != null) 079 throw new FHIRException("Unable to process translate " + code 080 + " because multiple targets were found in concept map " + cm.getUrl()); 081 tt = t; 082 } 083 } 084 if (tt == null) 085 return null; 086 return new Coding().setSystem(cg.getTarget()).setVersion(cg.getTargetVersion()).setCode(tt.getCode()) 087 .setDisplay(tt.getDisplay()); 088 } 089 090 private boolean isOkEquivalence(ConceptMapEquivalence equivalence) { 091 return equivalence != null && equivalence != ConceptMapEquivalence.DISJOINT 092 && equivalence != ConceptMapEquivalence.UNMATCHED; 093 } 094 095 private Coding translateBySystem(ConceptMap cm, String system, String code) { 096 throw new Error("Not done yet"); 097 } 098 099}