binding/mdsal-binding-dom-codec/src/main/java/org/opendaylight/mdsal/binding/dom/codec/impl/AbstractBindingNormalizedNodeCacheHolder.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.mdsal.binding.dom.codec.impl;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.cache.CacheBuilder;
  13 import com.google.common.cache.CacheLoader;
  14 import com.google.common.cache.LoadingCache;
  15 import com.google.common.collect.ImmutableSet;
  16 import org.opendaylight.mdsal.binding.dom.codec.api.BindingObjectCodecTreeNode;
  17 import org.opendaylight.yangtools.yang.binding.BindingObject;
  18
  19 /**
  20  * Abstract Holder of Binding to Normalized Node caches indexed by {@link DataContainerCodecContext} to which cache is
  21  * associated.
  22  */
  23 abstract class AbstractBindingNormalizedNodeCacheHolder {
  24     @SuppressWarnings("rawtypes")
  25     private final LoadingCache<CodecContext, AbstractBindingNormalizedNodeCache> caches =
  26         CacheBuilder.newBuilder().build(new CacheLoader<>() {
  27             @Override
  28             public AbstractBindingNormalizedNodeCache load(final CodecContext key) {
  29                 // FIXME: Use a switch expression once we have https://openjdk.org/jeps/441
  30                 if (key instanceof DataContainerCodecContext<?, ?> dataContainer) {
  31                     return new DataObjectNormalizedNodeCache(AbstractBindingNormalizedNodeCacheHolder.this,
  32                         dataContainer);
  33                 }
  34                 if (key instanceof LeafNodeCodecContext.OfTypeObject typeObject) {
  35                     return new TypeObjectNormalizedNodeCache<>(typeObject);
  36                 }
  37                 throw new IllegalStateException("Unhandled context " + key);
  38             }
  39         });
  40
  41     private final ImmutableSet<Class<?>> cacheSpec;
  42
  43     AbstractBindingNormalizedNodeCacheHolder(final ImmutableSet<Class<?>> cacheSpec) {
  44         this.cacheSpec = requireNonNull(cacheSpec);
  45     }
  46
  47     @SuppressWarnings("unchecked")
  48     <T extends BindingObject, C extends CodecContext & BindingObjectCodecTreeNode>
  49             AbstractBindingNormalizedNodeCache<T, C> getCachingSerializer(final C childCtx) {
  50         return isCached(childCtx.getBindingClass()) ? caches.getUnchecked(childCtx) : null;
  51     }
  52
  53     final boolean isCached(final Class<?> type) {
  54         return cacheSpec.contains(type);
  55     }
  56 }