Cleaned up Java Binding code from YANG Tools

[mdsal.git] / binding / mdsal-binding-dom-codec / src / main / java / org / opendaylight / yangtools / binding / data / codec / impl / AbstractBindingNormalizedNodeCacheHolder.java

diff --git a/binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/yangtools/binding/data/codec/impl/AbstractBindingNormalizedNodeCacheHolder.java b/binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/yangtools/binding/data/codec/impl/AbstractBindingNormalizedNodeCacheHolder.java
new file mode 100644 (file)
index 0000000..07d7464
--- /dev/null
+++ b/binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/yangtools/binding/data/codec/impl/AbstractBindingNormalizedNodeCacheHolder.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.yangtools.binding.data.codec.impl;
+
+import com.google.common.base.Preconditions;
+import com.google.common.cache.CacheBuilder;
+import com.google.common.cache.CacheLoader;
+import com.google.common.cache.LoadingCache;
+import java.util.Set;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+
+/**
+ *
+ * Abstract Holder of Binding to Normalized Node caches indexed by {@link DataContainerCodecContext}
+ * to which cache is associated.
+ *
+ */
+abstract class AbstractBindingNormalizedNodeCacheHolder {
+
+    private final Set<Class<? extends DataObject>> cachedValues;
+    private final LoadingCache<DataContainerCodecContext<?, ?>, BindingNormalizedNodeCache> caches = CacheBuilder
+            .newBuilder().build(new CacheLoader<DataContainerCodecContext<?, ?>, BindingNormalizedNodeCache>() {
+
+                @Override
+                public BindingNormalizedNodeCache load(final DataContainerCodecContext<?, ?> key) throws Exception {
+                    return new BindingNormalizedNodeCache(AbstractBindingNormalizedNodeCacheHolder.this, key);
+                }
+
+            });
+
+    protected AbstractBindingNormalizedNodeCacheHolder(final Set<Class<? extends DataObject>> cacheSpec) {
+        cachedValues = Preconditions.checkNotNull(cacheSpec);
+    }
+
+    BindingNormalizedNodeCache getCachingSerializer(final DataContainerCodecContext<?, ?> childCtx) {
+        if (isCached(childCtx.getBindingClass())) {
+            return caches.getUnchecked(childCtx);
+        }
+        return null;
+    }
+
+    boolean isCached(final Class<?> type) {
+        return cachedValues.contains(type);
+    }
+}