Java Code Examples for org.hl7.fhir.dstu3.model.ElementDefinition#hasBase()

/**
 * Generate a definition for a referenced element
 * @param sd Containing structure definition
 * @param ed Inner element
 * @return ShEx representation of element reference
 */
private String genInnerTypeDef(StructureDefinition sd, ElementDefinition ed) {
  String path = ed.hasBase() ? ed.getBase().getPath() : ed.getPath();;
  ST element_reference = tmplt(SHAPE_DEFINITION_TEMPLATE);
  element_reference.add("resourceDecl", "");  // Not a resource
  element_reference.add("id", path);
  String comment = ed.getShort();
  element_reference.add("comment", comment == null? " " : "# " + comment);

  List<String> elements = new ArrayList<String>();
  for (ElementDefinition child: ProfileUtilities.getChildList(sd, path, null))
    elements.add(genElementDefinition(sd, child));

  element_reference.add("elements", StringUtils.join(elements, "\n"));
  return element_reference.render();
}
 

private void updateFromBase(ElementDefinition derived, ElementDefinition base) {
  if (base.hasBase()) {
    if (!derived.hasBase())
      derived.setBase(new ElementDefinitionBaseComponent());
    derived.getBase().setPath(base.getBase().getPath());
    derived.getBase().setMin(base.getBase().getMin());
    derived.getBase().setMax(base.getBase().getMax());
  } else {
    if (!derived.hasBase())
      derived.setBase(new ElementDefinitionBaseComponent());
    derived.getBase().setPath(base.getPath());
    derived.getBase().setMin(base.getMin());
    derived.getBase().setMax(base.getMax());
  }
}
 

/**
 * This is simple: we just create an empty differential, generate the snapshot, and then insist it must match the base 
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void testSimple() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType("Patient");
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test");

  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size();
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        ok = Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation simple test failed");
  } else 
    System.out.println("Snap shot generation simple test passed");
}
 

/**
 * This is simple: we just create an empty differential, generate the snapshot, and then insist it must match the base. for a different resource with recursion 
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void testSimple2() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/ValueSet").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size();
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        ok = Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation simple test failed");
  } else 
    System.out.println("Snap shot generation simple test passed");
}
 

/**
 * Change one cardinality.
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void testCardinalityChange() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier");
  id.setMin(1);
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size();
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.identifier")) {
          ok = f.getMin() == 1;
          if (ok)
            f.setMin(0);
        }
        ok = ok && Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation chenge cardinality test failed");
  } else 
    System.out.println("Snap shot generation chenge cardinality test passed");
}
 

/**
 * Generate a ShEx element definition
 * @param sd Containing structure definition
 * @param ed Containing element definition
 * @return ShEx definition
 */
private String genElementDefinition(StructureDefinition sd, ElementDefinition ed) {
  String id = ed.hasBase() ? ed.getBase().getPath() : ed.getPath();
  String shortId = id.substring(id.lastIndexOf(".") + 1);
  String defn;
  ST element_def;
  String card = ("*".equals(ed.getMax()) ? (ed.getMin() == 0 ? "*" : "+") : (ed.getMin() == 0 ? "?" : "")) + ";";

  if(id.endsWith("[x]")) {
    element_def = ed.getType().size() > 1? tmplt(INNER_SHAPE_TEMPLATE) : tmplt(ELEMENT_TEMPLATE);
    element_def.add("id", "");
  } else {
    element_def = tmplt(ELEMENT_TEMPLATE);
    element_def.add("id", "fhir:" + (id.charAt(0) == id.toLowerCase().charAt(0)? shortId : id) + " ");
  }

  List<ElementDefinition> children = ProfileUtilities.getChildList(sd, ed);
  if (children.size() > 0) {
    innerTypes.add(new ImmutablePair<StructureDefinition, ElementDefinition>(sd, ed));
    defn = simpleElement(sd, ed, id);
  } else if(id.endsWith("[x]")) {
    defn = genChoiceTypes(sd, ed, id);
  }
  else if (ed.getType().size() == 1) {
    // Single entry
    defn = genTypeRef(sd, ed, id, ed.getType().get(0));
  } else if (ed.getContentReference() != null) {
    // Reference to another element
    String ref = ed.getContentReference();
    if(!ref.startsWith("#"))
      throw new AssertionError("Not equipped to deal with absolute path references: " + ref);
    String refPath = null;
    for(ElementDefinition ed1: sd.getSnapshot().getElement()) {
      if(ed1.getId() != null && ed1.getId().equals(ref.substring(1))) {
        refPath = ed1.getPath();
        break;
      }
    }
    if(refPath == null)
      throw new AssertionError("Reference path not found: " + ref);
    // String typ = id.substring(0, id.indexOf(".") + 1) + ed.getContentReference().substring(1);
    defn = simpleElement(sd, ed, refPath);
  } else if(id.endsWith("[x]")) {
    defn = genChoiceTypes(sd, ed, id);
  } else {
    // TODO: Refactoring required here
    element_def = genAlternativeTypes(ed, id, shortId);
    element_def.add("id", id.charAt(0) == id.toLowerCase().charAt(0)? shortId : id);
    element_def.add("card", card);
    addComment(element_def, ed);
    return element_def.render();
  }
  element_def.add("defn", defn);
  element_def.add("card", card);
  addComment(element_def, ed);
  return element_def.render();
}
 

/**
 * check that documentation appending is working
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void testDocumentationAppend() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier");
  id.setDefinition("... some more doco");
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size();
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.identifier")) {
          ok = f.getDefinition().length() > b.getDefinition().length();
          if (ok) {
            f.setDefinition(null);
            b.setDefinition(null);
          }
        }
        ok = ok && Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation documentation append failed");
  } else 
    System.out.println("Snap shot generation documentation append test passed");
}
 

/**
 * check that narrowing types is working
 * this one doesn't rename the path
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void textTypeNarrowing1() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.deceased[x]");
  id.addType().setCode("dateTime");
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size();
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.deceasedDateTime")) {
          ok = f.getType().size() == 1 && f.getType().get(0).getCode().equals("dateTime");
          if (ok) {
            f.getType().clear();
            b.getType().clear();
            f.setPath(b.getPath());
          }
        }
        ok = ok && Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation narrow type 1 failed");
  } else 
    System.out.println("Snap shot generation narrow type 1 test passed");
}
 

/**
 * check that narrowing types is working
 * this one renames the path
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void textTypeNarrowing2() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.deceasedDateTime");
  id.addType().setCode("dateTime");
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size();
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.deceasedDateTime")) {
          ok = f.getType().size() == 1 && f.getType().get(0).getCode().equals("dateTime");
          if (ok) {
            f.getType().clear();
            b.getType().clear();
            f.setPath(b.getPath());
          }
        }
        ok = ok && Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation narrow type 2 failed");
  } else 
    System.out.println("Snap shot generation narrow type 2 test passed");
}
 

/**
 * check that mapping resolution is working
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void testMapping() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier");
  id.addMapping().setIdentity("rim").setMap("test");
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size();
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.identifier")) {
          ok = f.getMapping().size() > b.getMapping().size();
          if (ok) {
            f.getMapping().clear();
            b.getMapping().clear();
          }
        }
        ok = ok && Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation mapping changes failed");
  } else 
    System.out.println("Snap shot generation mapping changes test passed");
}
 

/**
 * Walking into a type 
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void testTypeWalk() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier");
  id.setMustSupport(true);
  id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier.system");
  id.setMustSupport(true);
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  // the derived should be 8 longer
  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size() - 8;
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i <= 9 ? i : i + 8);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.identifier")) {
          ok = f.getMustSupport() && !b.getMustSupport();
          if (ok) {
            f.setMustSupportElement(null);
          }
        }
        ok = Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation simple test failed");
  } else 
    System.out.println("Snap shot generation simple test passed");
}
 

/**
 * Walking into a type, without explicitly doing so 
 * 
 * note: this currently fails.
 * 
 * @param context2
 * @
 * @throws EOperationOutcome 
 */
private void testTypeWalk2() throws EOperationOutcome, Exception {
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier.system");
  id.setMustSupport(true);
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  // the derived should be 8 longer
  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size() - 8;
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i <= 9 ? i : i + 8);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.identifier")) {
          ok = f.getMustSupport() && !b.getMustSupport();
          if (ok) {
            f.setMustSupportElement(null);
          }
        }
        ok = Base.compareDeep(b, f, true);
      }
    }
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation simple test failed");
  } else 
    System.out.println("Snap shot generation simple test passed");
}
 

/**
 * we're going to slice Patient.identifier
 */
private void testSlicingSimple() throws EOperationOutcome, Exception {
  
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  
  // set the slice up
  ElementDefinition id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier");
  id.getSlicing().setOrdered(false).setRules(SlicingRules.OPEN).addDiscriminator().setPath("use").setType(DiscriminatorType.VALUE);
  
  // first slice: 
  id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier");
  id.setSliceName("name1");
  id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier.use");
  id.setFixed(new CodeType("usual"));
  
  // second slice:
  id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier");
  id.setSliceName("name2");
  id = focus.getDifferential().addElement();
  id.setPath("Patient.identifier.use");
  id.setFixed(new CodeType("official"));
  
  
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  new ProfileUtilities(context, messages, null).generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  // 18 different: identifier + 8 inner children * 2 
  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size() - 18;
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i <= 9 ? i : i + 18);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.identifier")) {
          ok = f.hasSlicing();
          if (ok)
            f.setSlicing(null);
        }            
        ok = Base.compareDeep(b, f, true);
      }
    }
  }
  // now, check that the slices we skipped are correct:
  for (int i = 10; i <= 18; i++) {
    if (ok) {
      ElementDefinition d1 = focus.getSnapshot().getElement().get(i);
      ElementDefinition d2 = focus.getSnapshot().getElement().get(i+9);
      if (d1.getPath().equals("Patient.identifier.use")) {
        ok = d1.hasFixed() && d2.hasFixed() && !Base.compareDeep(d1.getFixed(), d2.getFixed(), true);
        if (ok) {
          d1.setFixed(null);
          d2.setFixed(null);
        }
      }
      if (d1.getPath().equals("Patient.identifier")) {
        ok = d1.hasSliceName() && d2.hasSliceName() && !Base.compareDeep(d1.getSliceNameElement(), d2.getSliceNameElement(), true);
        if (ok) {
          d1.setSliceName(null);
          d2.setSliceName(null);
        }
      }
      ok = Base.compareDeep(d1, d2, true);
    }
  }
  // for throughness, we could check against identifier too, but this is not done now.
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation slicing failed");
  } else 
    System.out.println("Snap shot generation slicing passed");
  
}
 

/**
 * we're going to slice Patient.extension and refer to extension by profile
 * 
 * implicit: whether to rely on implicit extension slicing
 */
private void testSlicingExtension(boolean implicit) throws EOperationOutcome, Exception {
  
  StructureDefinition focus = new StructureDefinition();
  StructureDefinition base = context.fetchResource(StructureDefinition.class, "http://hl7.org/fhir/StructureDefinition/Patient").copy();
  focus.setUrl(Utilities.makeUuidUrn());
  focus.setBaseDefinition(base.getUrl());
  focus.setType(base.getType());
  focus.setDerivation(TypeDerivationRule.CONSTRAINT);
  
  // set the slice up
  ElementDefinition id;
  if (!implicit) {
    id = focus.getDifferential().addElement();
    id.setPath("Patient.extension");
    id.getSlicing().setOrdered(false).setRules(SlicingRules.OPEN).addDiscriminator().setPath("url").setType(DiscriminatorType.VALUE);
    id.setMax("3");
  }
  // first slice: 
  id = focus.getDifferential().addElement();
  id.setPath("Patient.extension");
  id.setSliceName("name1");
  id.addType().setCode("Extension").setProfile("http://hl7.org/fhir/StructureDefinition/patient-birthTime");
  id.setMin(1);
  
  // second slice:
  id = focus.getDifferential().addElement();
  id.setPath("Patient.extension");
  id.setSliceName("name2");
  id.addType().setCode("Extension").setProfile("http://hl7.org/fhir/StructureDefinition/patient-mothersMaidenName");    
  
  List<ValidationMessage> messages = new ArrayList<ValidationMessage>();
  ProfileUtilities pu = new ProfileUtilities(context, messages, null);
  pu.generateSnapshot(base, focus, focus.getUrl(), "Simple Test" );

  // 2 different: extension slices 
  boolean ok = base.getSnapshot().getElement().size() == focus.getSnapshot().getElement().size() - 2;
  for (int i = 0; i < base.getSnapshot().getElement().size(); i++) {
    if (ok) {
      ElementDefinition b = base.getSnapshot().getElement().get(i);
      ElementDefinition f = focus.getSnapshot().getElement().get(i <= 7 ? i : i + 2);
      if (!f.hasBase() || !b.getPath().equals(f.getBase().getPath())) 
        ok = false;
      else {
        f.setBase(null);
        if (f.getPath().equals("Patient.extension")) {
          ok = f.hasSlicing() && (implicit || f.getMax().equals("3"));
          if (ok) {
            f.setSlicing(null);
            f.setMaxElement(b.getMaxElement());
          }
        }            
        if (!f.getPath().equals("Patient.extension")) // no compare that because the definitions get overwritten 
          ok = Base.compareDeep(b, f, true);
      }
    }
  }
  // now, check that the slices we skipped are correct:
  if (ok) {
    ElementDefinition d1 = focus.getSnapshot().getElement().get(8);
    ElementDefinition d2 = focus.getSnapshot().getElement().get(9);
    ok = d1.hasType() && d1.getType().get(0).hasProfile() && d2.hasType() && d2.getType().get(0).hasProfile() && !Base.compareDeep(d1.getType(), d2.getType(), true) &&
          d1.getMin() == 1 && d2.getMin() == 0 && d1.getMax().equals("1") && d2.getMax().equals("1");
    if (ok) {
      d1.getType().clear();
      d2.getType().clear();
      d1.setSliceName("x");
      d2.setSliceName("x");
      d1.setMin(0);
    }
    ok = Base.compareDeep(d1, d2, true);
    // for throughness, we could check against extension too, but this is not done now.
  }
  
  if (!ok) {
    compareXml(base, focus);
    throw new FHIRException("Snap shot generation slicing extensions simple ("+(implicit ? "implicit" : "not implicit")+") failed");
  } else 
    System.out.println("Snap shot generation slicing extensions simple ("+(implicit ? "implicit" : "not implicit")+") passed");
}