1 files changed, 53 insertions, 0 deletions
diff --git a/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistReader.java b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistReader.java
new file mode 100644
index 000000000..f4897c275
--- /dev/null
+++ b/common/yang-whitelist/yang-whitelist-impl/src/main/java/io/fd/honeycomb/yang/YangModuleWhitelistReader.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * 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.fd.honeycomb.yang;
+
+import static java.lang.String.format;
+
+import java.nio.file.Path;
+import javax.annotation.Nonnull;
+import javax.xml.bind.JAXBException;
+import javax.xml.bind.Unmarshaller;
+
+public class YangModuleWhitelistReader extends JAXBContextHolder {
+
+    public YangModuleWhitelistReader() {
+        super(YangModuleWhitelist.class);
+    }
+
+    @Nonnull
+    public YangModuleWhitelist read(@Nonnull final Path path) {
+        final Unmarshaller unmarshaller = createUnmarshaller();
+        return YangModuleWhitelist.class.cast(readWhitelist(path, unmarshaller));
+    }
+
+    private static Object readWhitelist(final Path path, final Unmarshaller unmarshaller) {
+        try {
+            return unmarshaller.unmarshal(path.toFile());
+        } catch (JAXBException e) {
+            throw new IllegalStateException(format("Unable to read whitelist from %s", path), e);
+        }
+    }
+
+    private Unmarshaller createUnmarshaller() {
+        try {
+            return getCtx().createUnmarshaller();
+        } catch (JAXBException e) {
+            throw new IllegalStateException("Unable to create unmarshaller", e);
+        }
+    }
+}