Fix #36 - Allow removal of extensions

hapi-fhir-base/src/main/java/ca/uhn/fhir/model/api/BaseElement.java

@@ -91,7 +91,7 @@ public List<ExtensionDt> getUndeclaredExtensions() {
 		if (myUndeclaredExtensions == null) {
 			myUndeclaredExtensions = new ArrayList<ExtensionDt>();
 		}
-		return Collections.unmodifiableList(myUndeclaredExtensions);
+		return (myUndeclaredExtensions);
 	}
 
 	@Override
@@ -111,7 +111,7 @@ public List<ExtensionDt> getUndeclaredModifierExtensions() {
 		if (myUndeclaredModifierExtensions == null) {
 			myUndeclaredModifierExtensions = new ArrayList<ExtensionDt>();
 		}
-		return Collections.unmodifiableList(myUndeclaredModifierExtensions);
+		return (myUndeclaredModifierExtensions);
 	}
 
 	/**

hapi-fhir-base/src/main/java/ca/uhn/fhir/model/api/ISupportsUndeclaredExtensions.java

@@ -27,22 +27,28 @@
 public interface ISupportsUndeclaredExtensions extends IElement {
 
 	/**
-	 * Returns a list containing all undeclared non-modifier extensions
+	 * Returns a list containing all undeclared non-modifier extensions. The returned list
+	 * is mutable, so it may be modified (e.g. to add or remove an extension).
 	 */
 	List<ExtensionDt> getUndeclaredExtensions();
 
 	/**
-	 * Returns a list containing all undeclared extensions (modifier and non-modifier) by extension URL
+	 * Returns an <b>immutable</b> list containing all undeclared extensions (modifier and non-modifier) by extension URL
+	 * 
+	 * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove extensions
 	 */
 	List<ExtensionDt> getUndeclaredExtensionsByUrl(String theUrl);
 
 	/**
-	 * Returns an <b>immutable</b> list containing all extensions (modifier and non-modifier)
+	 * Returns an <b>immutable</b> list containing all extensions (modifier and non-modifier).
+	 * 
+	 * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove extensions
 	 */
 	List<ExtensionDt> getAllUndeclaredExtensions();
 
 	/**
-	 * Returns a list containing all undeclared modifier extensions
+	 * Returns a list containing all undeclared modifier extensions. The returned list
+	 * is mutable, so it may be modified (e.g. to add or remove an extension).
 	 */
 	List<ExtensionDt> getUndeclaredModifierExtensions();
 
@@ -65,13 +71,17 @@ public interface ISupportsUndeclaredExtensions extends IElement {
 
 	/**
 	 * Adds an extension to this object
+	 * 
+	 * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove extensions
 	 */
 	ExtensionDt addUndeclaredExtension(boolean theIsModifier, String theUrl, IBaseDatatype theValue);
 
 	/**
 	 * Adds an extension to this object. This method is intended for use when
 	 * an extension is being added which will contain child extensions, as opposed to
 	 * a datatype.
+	 * 
+	 * @see #getUndeclaredExtensions() To return a mutable list which may be used to remove extensions
 	 */
 	ExtensionDt addUndeclaredExtension(boolean theIsModifier, String theUrl);
 

hapi-fhir-testpage-overlay/src/main/webapp/css/tester.css

@@ -11,8 +11,8 @@ fieldset[disabled].btn {
 
 /* Move down content because we have a fixed navbar that is 50px tall */
 body {
-  padding-top: 50px;
-  overflow-x: hidden;
+	padding-top: 50px;
+	overflow-x: hidden;
 }
 
 .clientCodeBox
@@ -144,23 +144,24 @@ PRE.resultBodyPre {
 	background-color: transparent;
 	overflow: visible;
 	/*white-space: normal;*/
+	white-space: pre-wrap;
 }
 
 /*
  * Global add-ons
  */
 
 .sub-header {
-  padding-bottom: 10px;
-  border-bottom: 1px solid #eee;
+	padding-bottom: 10px;
+	border-bottom: 1px solid #eee;
 }
 
 body .syntaxhighlighter .line {
-        white-space: pre-wrap !important; /* make code wrap */
+	white-space: pre-wrap !important; /* make code wrap */
 }
 
 .syntaxhighlight {
-    white-space: pre-wrap;
+	white-space: pre-wrap;
 }
 
 /*
@@ -216,14 +217,14 @@ body .syntaxhighlighter .line {
   padding: 20px;
 }
 @media (min-width: 768px) {
-  .main {
-  	padding-top: 10px;
-    padding-right: 10px;
-    padding-left: 10px;
-  }
+	.main {
+		padding-top: 10px;
+		padding-right: 10px;
+		padding-left: 10px;
+	}
 }
 .main .page-header {
-  margin-top: 0;
+	margin-top: 0;
 }
 
 .navBarButtonLabel {
@@ -235,18 +236,18 @@ body .syntaxhighlighter .line {
  */
 
 .placeholders {
-  margin-bottom: 30px;
-  text-align: center;
+	margin-bottom: 30px;
+	text-align: center;
 }
 .placeholders h4 {
-  margin-bottom: 0;
+	margin-bottom: 0;
 }
 .placeholder {
-  margin-bottom: 20px;
+	margin-bottom: 20px;
 }
 .placeholder img {
-  display: inline-block;
-  border-radius: 50%;
+	display: inline-block;
+	border-radius: 50%;
 }
 
 DIV.queryParameter {

src/changes/changes.xml

@@ -164,6 +164,10 @@
 				enter partial dates, or dates without times, or even test out invalid date
 				options.
 			</action>
+			<action type="fix" issue="36">
+				Make BaseElement#getUndeclaredExtensions() and BaseElement#getUndeclaredExtensions() return
+				a mutable list so that it is possible to delete extensions from a resource instance.
+			</action>
 		</release>
 		<release version="0.9" date="2015-Mar-14">
 			<action type="add">