From dcf692cbdb43d804aa01d6e3342d088d6f63c1b2 Mon Sep 17 00:00:00 2001
From: Oliver Gierke <ogierke@gopivotal.com>
Date: Tue, 11 Aug 2015 21:17:20 +0200
Subject: [PATCH] #375 - Fixed is-empty evaluation for
 TrueOnlyBooleanSerializer on Jackson 2.6.
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Added missing override for isEmpty(…) that gets used by Jackson 2.6+ to prevent { templated : false } get rendered in HAL link representations.

Polished Javadoc on the way.
---
 .../hateoas/hal/Jackson2HalModule.java        | 29 +++++++++++++++++--
 1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/springframework/hateoas/hal/Jackson2HalModule.java b/src/main/java/org/springframework/hateoas/hal/Jackson2HalModule.java
index 17730b47..4fe4a058 100644
--- a/src/main/java/org/springframework/hateoas/hal/Jackson2HalModule.java
+++ b/src/main/java/org/springframework/hateoas/hal/Jackson2HalModule.java
@@ -675,22 +675,47 @@ public class Jackson2HalModule extends SimpleModule {
 			super(Boolean.class);
 		}
 
+		/*
+		 * (non-Javadoc)
+		 * @see com.fasterxml.jackson.databind.JsonSerializer#isEmpty(java.lang.Object)
+		 */
 		@Override
 		public boolean isEmpty(Boolean value) {
+			return isEmpty(null, value);
+		}
+
+		/* 
+		 * (non-Javadoc)
+		 * @see com.fasterxml.jackson.databind.JsonSerializer#isEmpty(com.fasterxml.jackson.databind.SerializerProvider, java.lang.Object)
+		 */
+		@Override
+		public boolean isEmpty(SerializerProvider provider, Boolean value) {
 			return value == null || Boolean.FALSE.equals(value);
 		}
 
+		/*
+		 * (non-Javadoc)
+		 * @see com.fasterxml.jackson.databind.ser.std.StdSerializer#serialize(java.lang.Object, com.fasterxml.jackson.core.JsonGenerator, com.fasterxml.jackson.databind.SerializerProvider)
+		 */
 		@Override
-		public void serialize(Boolean value, JsonGenerator jgen, SerializerProvider provider) throws IOException,
-				JsonGenerationException {
+		public void serialize(Boolean value, JsonGenerator jgen, SerializerProvider provider)
+				throws IOException, JsonGenerationException {
 			jgen.writeBoolean(value.booleanValue());
 		}
 
+		/*
+		 * (non-Javadoc)
+		 * @see com.fasterxml.jackson.databind.ser.std.StdScalarSerializer#getSchema(com.fasterxml.jackson.databind.SerializerProvider, java.lang.reflect.Type)
+		 */
 		@Override
 		public JsonNode getSchema(SerializerProvider provider, Type typeHint) {
 			return createSchemaNode("boolean", true);
 		}
 
+		/*
+		 * (non-Javadoc)
+		 * @see com.fasterxml.jackson.databind.ser.std.StdScalarSerializer#acceptJsonFormatVisitor(com.fasterxml.jackson.databind.jsonFormatVisitors.JsonFormatVisitorWrapper, com.fasterxml.jackson.databind.JavaType)
+		 */
 		@Override
 		public void acceptJsonFormatVisitor(JsonFormatVisitorWrapper visitor, JavaType typeHint)
 				throws JsonMappingException {