Move StaticCacheKeyFactory to honeycomb project

Change-Id: I566c8ce15ac1cbf932c900812c12bd9c56b223f7
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

diff --git a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/StaticCacheKeyFactory.java b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/StaticCacheKeyFactory.java
new file mode 100644 (file)
index 0000000..216aadb
--- /dev/null
+++ b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/cache/StaticCacheKeyFactory.java
@@ -0,0 +1,56 @@
+/*
+ * 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.translate.util.read.cache;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+
+/**
+ * {@link CacheKeyFactory} that produces the same key irrespective of the given {@link InstanceIdentifier}.
+ */
+public class StaticCacheKeyFactory implements CacheKeyFactory<Void> {
+
+    private final String key;
+    private final Class<?> cachedDataType;
+
+    /**
+     * Construct static cache key factory.
+     *
+     * @param key            string to be used as cache key
+     * @param cachedDataType data for which this factory is creating keys
+     */
+    public StaticCacheKeyFactory(@Nonnull final String key, @Nonnull final Class<?> cachedDataType) {
+        this.key = checkNotNull(key, "key should not be null");
+        this.cachedDataType = checkNotNull(cachedDataType, "cachedDataType should not be null");
+    }
+
+    @Nonnull
+    @Override
+    public String createKey(@Nonnull final InstanceIdentifier<?> actualContextIdentifier,
+                            @Nullable final Void dumpParams) {
+        return key;
+    }
+
+    @Nonnull
+    @Override
+    public Class<?> getCachedDataType() {
+        return cachedDataType;
+    }
+}