GH-2336 - Enhance logical Link comparability.

Author: odrotbohm

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

@@ -251,6 +251,16 @@ public Link withAffordances(List<Affordance> affordances) {
 				this.profile, this.name, this.template, affordances);
 	}
 
+	/**
+	 * Returns a new {@link Link} without any {@link Affordance}s.
+	 *
+	 * @return will never be {@literal null}.
+	 * @since 3.0
+	 */
+	public Link withoutAffordances() {
+		return withAffordances(Collections.emptyList());
+	}
+
 	/**
 	 * Returns the variable names contained in the template.
 	 *
@@ -289,13 +299,26 @@ public boolean isTemplated() {
 		return template == null ? false : !template.getVariables().isEmpty();
 	}
 
+	/**
+	 * Returns whether the links are logically the same, i.e. share all link characteristics but might have different
+	 * affordances attached.
+	 *
+	 * @param other must not be {@literal null}.
+	 * @since 3.0
+	 */
+	public boolean isSameAs(Link other) {
+
+		Assert.notNull(other, "Link must not be null!");
+
+		return withoutAffordances().equals(other.withoutAffordances());
+	}
+
 	/**
 	 * Turns the current template into a {@link Link} by expanding it using the given parameters.
 	 *
 	 * @param arguments
 	 * @return
 	 */
-	@SuppressWarnings("null")
 	public Link expand(Object... arguments) {
 
 		UriTemplate template = this.template;