001package org.hl7.fhir.dstu2.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    
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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 
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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 
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030 */
031
032import org.hl7.fhir.dstu2.model.OperationOutcome.IssueSeverity;
033import org.hl7.fhir.dstu2.model.ValueSet;
034import org.hl7.fhir.dstu2.model.ValueSet.ConceptDefinitionComponent;
035import org.hl7.fhir.dstu2.model.ValueSet.ConceptSetComponent;
036import org.hl7.fhir.dstu2.model.ValueSet.ValueSetExpansionComponent;
037import org.hl7.fhir.dstu2.terminologies.ValueSetExpander.ValueSetExpansionOutcome;
038
039/**
040 * The value set system has a collection of value sets that define code systems,
041 * and construct value sets from them
042 * 
043 * Large external terminologies - LOINC, Snomed, etc - are too big, and trying
044 * to represent their definition as a native value set is too large. (e.g. LOINC
045 * + properties ~ 500MB). So we don't try. Instead. we assume that there's some
046 * external server that provides these services, using this interface
047 * 
048 * The FHIR build tool uses http://fhir.healthintersections.com.au for these
049 * services
050 * 
051 * @author Grahame
052 *
053 */
054public interface ITerminologyServices {
055  /**
056   * return true if the service handles code or value set resolution on the system
057   */
058  public boolean supportsSystem(String system);
059
060  /**
061   * given a system|code, return a definition for it. Nil means not valid
062   */
063  public ConceptDefinitionComponent getCodeDefinition(String system, String code);
064
065  public class ValidationResult {
066    private IssueSeverity severity;
067    private String message;
068
069    public ValidationResult(IssueSeverity severity, String message) {
070      super();
071      this.severity = severity;
072      this.message = message;
073    }
074
075    public IssueSeverity getSeverity() {
076      return severity;
077    }
078
079    public String getMessage() {
080      return message;
081    }
082
083  }
084
085  /**
086   * for this system|code and display, validate the triple against the rules of
087   * the underlying code system
088   */
089  public ValidationResult validateCode(String system, String code, String display);
090
091  /**
092   * Expand the value set fragment (system | codes | filters). Note that this
093   * might fail if the expansion is very large. If the expansion fails, then the
094   * checkVS will be called instead
095   */
096  public ValueSetExpansionComponent expandVS(ConceptSetComponent inc) throws Exception;
097
098//  public ValueSet expandVS(ValueSet vs) throws Exception;
099  public ValueSetExpansionOutcome expand(ValueSet vs);
100
101  /**
102   * Test the value set fragment (system | codes | filters).
103   */
104  public boolean checkVS(ConceptSetComponent vsi, String system, String code);
105
106  public boolean verifiesSystem(String system);
107
108}