From 8968802bf8d7ddd905c1bdfee1aefeee9bc6b94b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabio=20Jos=C3=A9?= <fabiojose@gmail.com>
Date: Mon, 26 Aug 2019 21:41:34 -0300
Subject: [PATCH] Turns a map o extensions into instances of ExtensionFormat
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Signed-off-by: Fabio José <fabiojose@gmail.com>
---
 .../cloudevents/fun/ExtensionUmarshaller.java | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 api/src/main/java/io/cloudevents/fun/ExtensionUmarshaller.java

diff --git a/api/src/main/java/io/cloudevents/fun/ExtensionUmarshaller.java b/api/src/main/java/io/cloudevents/fun/ExtensionUmarshaller.java
new file mode 100644
index 00000000..920656c1
--- /dev/null
+++ b/api/src/main/java/io/cloudevents/fun/ExtensionUmarshaller.java
@@ -0,0 +1,38 @@
+/**
+ * Copyright 2019 The CloudEvents Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.cloudevents.fun;
+
+import java.util.Map;
+import java.util.Optional;
+
+import io.cloudevents.extensions.ExtensionFormat;
+
+/**
+ * 
+ * @author fabiojose
+ *
+ */
+@FunctionalInterface
+public interface ExtensionUmarshaller {
+
+	/**
+	 * Unmarshals the map of extensions into {@link ExtensionFormat}
+	 * @param extensions
+	 * @return
+	 */
+	Optional<ExtensionFormat> unmarshal(Map<String, String> extensions);
+	
+}