diff options
Diffstat (limited to 'infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReaderRegistryBuilder.java')
-rw-r--r-- | infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReaderRegistryBuilder.java | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReaderRegistryBuilder.java b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReaderRegistryBuilder.java new file mode 100644 index 000000000..3e21bfca3 --- /dev/null +++ b/infra/translate-utils/src/main/java/io/fd/honeycomb/translate/util/read/registry/CompositeReaderRegistryBuilder.java @@ -0,0 +1,109 @@ +/* + * Copyright (c) 2016 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.registry; + +import com.google.common.collect.ImmutableMap; +import io.fd.honeycomb.translate.read.Reader; +import io.fd.honeycomb.translate.read.registry.ModifiableReaderRegistryBuilder; +import io.fd.honeycomb.translate.read.registry.ReaderRegistryBuilder; +import io.fd.honeycomb.translate.util.read.ReflexiveReader; +import io.fd.honeycomb.translate.read.registry.ReaderRegistry; +import io.fd.honeycomb.translate.util.AbstractSubtreeManagerRegistryBuilderBuilder; +import java.util.ArrayList; +import java.util.List; +import java.util.Set; +import java.util.stream.Collectors; +import javax.annotation.Nonnull; +import javax.annotation.concurrent.NotThreadSafe; +import org.opendaylight.yangtools.concepts.Builder; +import org.opendaylight.yangtools.yang.binding.DataObject; +import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +@NotThreadSafe +public final class CompositeReaderRegistryBuilder + extends AbstractSubtreeManagerRegistryBuilderBuilder<Reader<? extends DataObject, ? extends Builder<?>>, ReaderRegistry> + implements ModifiableReaderRegistryBuilder, ReaderRegistryBuilder { + + private static final Logger LOG = LoggerFactory.getLogger(CompositeReaderRegistryBuilder.class); + + @Override + protected Reader<? extends DataObject, ? extends Builder<?>> getSubtreeHandler(@Nonnull final Set<InstanceIdentifier<?>> handledChildren, + @Nonnull final Reader<? extends DataObject, ? extends Builder<?>> reader) { + return SubtreeReader.createForReader(handledChildren, reader); + } + + @Override + public <D extends DataObject> void addStructuralReader(@Nonnull InstanceIdentifier<D> id, + @Nonnull Class<? extends Builder<D>> builderType) { + add(new ReflexiveReader<>(id, builderType)); + } + + /** + * Create {@link CompositeReaderRegistry} with Readers ordered according to submitted relationships. + * <p/> + * Note: The ordering only applies between nodes on the same level, inter-level and inter-subtree relationships are + * ignored. + */ + @Override + public ReaderRegistry build() { + ImmutableMap<InstanceIdentifier<?>, Reader<? extends DataObject, ? extends Builder<?>>> mappedReaders = + getMappedHandlers(); + LOG.debug("Building Reader registry with Readers: {}", + mappedReaders.keySet().stream() + .map(InstanceIdentifier::getTargetType) + .map(Class::getSimpleName) + .collect(Collectors.joining(", "))); + + LOG.trace("Building Reader registry with Readers: {}", mappedReaders); + final List<InstanceIdentifier<?>> readerOrder = new ArrayList<>(mappedReaders.keySet()); + + // Wrap readers into composite readers recursively, collect roots and create registry + final TypeHierarchy typeHierarchy = TypeHierarchy.create(mappedReaders.keySet()); + final List<Reader<? extends DataObject, ? extends Builder<?>>> orderedRootReaders = + typeHierarchy.getRoots().stream() + .map(rootId -> toCompositeReader(rootId, mappedReaders, typeHierarchy)) + .collect(Collectors.toList()); + + // We are violating the ordering from mappedReaders, since we are forming a composite structure + // but at least order root writers + orderedRootReaders.sort((reader1, reader2) -> readerOrder.indexOf(reader1.getManagedDataObjectType()) + - readerOrder.indexOf(reader2.getManagedDataObjectType())); + + return new CompositeReaderRegistry(orderedRootReaders); + } + + private Reader<? extends DataObject, ? extends Builder<?>> toCompositeReader( + final InstanceIdentifier<?> instanceIdentifier, + final ImmutableMap<InstanceIdentifier<?>, Reader<? extends DataObject, ? extends Builder<?>>> mappedReaders, + final TypeHierarchy typeHierarchy) { + + // Order child readers according to the mappedReadersCollection + final ImmutableMap.Builder<Class<?>, Reader<?, ? extends Builder<?>>> childReadersMapB = ImmutableMap.builder(); + for (InstanceIdentifier<?> childId : mappedReaders.keySet()) { + if (typeHierarchy.getDirectChildren(instanceIdentifier).contains(childId)) { + childReadersMapB.put(childId.getTargetType(), toCompositeReader(childId, mappedReaders, typeHierarchy)); + } + } + + final ImmutableMap<Class<?>, Reader<?, ? extends Builder<?>>> childReadersMap = childReadersMapB.build(); + return childReadersMap.isEmpty() + ? mappedReaders.get(instanceIdentifier) + : CompositeReader.createForReader(mappedReaders.get(instanceIdentifier), childReadersMap); + } +} |