Mix-ins added for Jackson Serialization/deserialization

Fixes gh-434

samples/httpsession-redis-json/src/main/java/sample/mixins/UserDeserializer.java

@@ -0,0 +1,38 @@
+package sample.mixins;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.userdetails.User;
+
+import java.io.IOException;
+import java.util.Set;
+
+import static sample.utils.JsonNodeExtractor.*;
+
+/**
+ * @author jitendra on 14/3/16.
+ */
+public class UserDeserializer extends JsonDeserializer<User> {
+
+    @Override
+    public User deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException {
+        ObjectMapper mapper = (ObjectMapper) p.getCodec();
+        JsonNode jsonNode = mapper.readTree(p);
+        Set<GrantedAuthority> authorities = mapper.readValue(jsonNode.get("authorities").toString(), new TypeReference<Set<GrantedAuthority>>() {});
+        return new User(
+                getStringValue(jsonNode, "username"),
+                getStringValue(jsonNode, "password", ""),
+                getBooleanValue(jsonNode, "enabled"),
+                getBooleanValue(jsonNode, "accountNonExpired"),
+                getBooleanValue(jsonNode, "credentialsNonExpired"),
+                getBooleanValue(jsonNode, "accountNonLocked"),
+                authorities
+        );
+    }
+}