add sorting utility method

org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/patterns/PatternBaseImpl.java

@@ -0,0 +1,66 @@
+package org.hl7.fhir.r5.patterns;
+
+import java.util.List;
+
+import org.hl7.fhir.r5.model.Annotation;
+import org.hl7.fhir.r5.model.Base;
+import org.hl7.fhir.r5.model.DomainResource;
+import org.hl7.fhir.r5.model.Element;
+import org.hl7.fhir.r5.model.Extension;
+import org.hl7.fhir.r5.model.Resource;
+
+public class PatternBaseImpl implements PatternBase {
+
+  private Base wrapped;
+  
+  public PatternBaseImpl(Base wrapped) {
+    super();
+    this.wrapped = wrapped;
+  }
+
+  @Override
+  public String getId() {
+    if (wrapped instanceof Element)
+      return ((Element) wrapped).getId();
+    if (wrapped instanceof Resource)
+      return ((Resource) wrapped).getId();
+    return null;
+  }
+
+  @Override
+  public PatternBase setId(String value) {
+    if (wrapped instanceof Element)
+      ((Element) wrapped).setId(value);
+    else if (wrapped instanceof Resource)
+      ((Resource) wrapped).setId(value);
+    else
+      throw new Error("this should not happen? wrapped = "+wrapped.getClass().getName());
+    return this;
+  }
+
+  @Override
+  public List<Extension> getExtension() {
+    if (wrapped instanceof Element)
+      return ((Element) wrapped).getExtension();
+    if (wrapped instanceof DomainResource)
+      return ((DomainResource) wrapped).getExtension();
+    return null;
+  }
+
+
+  protected Annotation convertStringToAnnotation(String value) {
+    if (value == null)
+      return null;
+    else
+      return new Annotation().setText(value);
+  }
+  
+  protected String convertAnnotationToString(Annotation value) {
+    if (value == null)
+      return null;
+    else
+      return value.getText();
+  }
+
+
+}

org.hl7.fhir.utilities/src/main/java/org/hl7/fhir/utilities/Utilities.java

@@ -64,6 +64,7 @@ import java.math.BigDecimal;
 import java.net.URLEncoder;
 import java.nio.channels.FileChannel;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -1170,6 +1171,13 @@ public class Utilities {
     return id.matches("[A-Za-z0-9\\-\\.]{1,64}");
   }
 
+  public static List<String> sorted(Set<String> set) {
+    List<String> list = new ArrayList<>();
+    list.addAll(set);
+    Collections.sort(list);
+    return list;
+  }
+
 
 
 }