#678 - Add 'profile' to Link.

Fully support HAL spec by adding "profile" as another optional attribute to `Link`.

See: https://tools.ietf.org/html/draft-kelly-json-hal-08, https://tools.ietf.org/html/rfc5988

src/main/java/org/springframework/hateoas/Link.java

@@ -68,6 +68,7 @@ public class Link implements Serializable {
 	private @Wither String title;
 	private @Wither String type;
 	private @Wither String deprecation;
+	private @Wither String profile;
 	private @JsonIgnore UriTemplate template;
 	private @JsonIgnore List<Affordance> affordances;
 
@@ -183,7 +184,7 @@ public class Link implements Serializable {
 	public Link withAffordances(List<Affordance> affordances) {
 
 		return new Link(this.rel, this.href, this.hreflang, this.media, this.title, this.type, this.deprecation,
-				this.template, affordances);
+				this.profile, this.template, affordances);
 	}
 
 	/**
@@ -298,6 +299,10 @@ public class Link implements Serializable {
 			linkString += ";deprecation=\"" + deprecation + "\"";
 		}
 
+		if (profile != null) {
+			linkString += ";profile=\"" + profile + "\"";
+		}
+
 		return linkString;
 	}
 
@@ -349,6 +354,10 @@ public class Link implements Serializable {
 				link = link.withDeprecation(attributes.get("deprecation"));
 			}
 
+			if (attributes.containsKey("profile")) {
+				link = link.withProfile(attributes.get("profile"));
+			}
+
 			return link;
 
 		} else {

src/test/java/org/springframework/hateoas/LinkUnitTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -110,6 +110,7 @@ public class LinkUnitTest {
 	/**
 	 * @see #54
 	 * @see #100
+	 * @see #678
 	 */
 	@Test
 	public void parsesRFC5988HeaderIntoLink() {
@@ -122,13 +123,15 @@ public class LinkUnitTest {
 				+ "media=\"pdf\";" //
 				+ "title=\"pdf customer copy\";" //
 				+ "type=\"portable document\";" //
-				+ "deprecation=\"http://example.com/customers/deprecated\"")) //
+				+ "deprecation=\"http://example.com/customers/deprecated\";" //
+				+ "profile=\"my-profile\"")) //
 						.isEqualTo(new Link("/customer/1") //
 								.withHreflang("en") //
 								.withMedia("pdf") //
 								.withTitle("pdf customer copy") //
 								.withType("portable document") //
-								.withDeprecation("http://example.com/customers/deprecated"));
+								.withDeprecation("http://example.com/customers/deprecated")
+								.withProfile("my-profile"));
 	}
 
 	/**