diff options
author | Maros Marsalek <mmarsale@cisco.com> | 2016-07-27 11:05:51 +0200 |
---|---|---|
committer | Maros Marsalek <mmarsale@cisco.com> | 2016-07-29 16:32:07 +0200 |
commit | 0578156b721fa01c8c645b8f9625ecebdb6449e4 (patch) | |
tree | 49d36f24e5d984a8c9f151b1440de88619f8b7de /v3po/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/read/registry/SubtreeReader.java | |
parent | 007d4542388ca89be409ce1a4a4c7a36ddcb538f (diff) |
HONEYCOMB-130: Separate v3po plugin from HC infra
Creating folders:
- common/
- infra/
- v3po/
- vpp-common/
Change-Id: I2c39e1b17e39e7c0f0628f44aa5fe08563fa06e4
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Diffstat (limited to 'v3po/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/read/registry/SubtreeReader.java')
-rw-r--r-- | v3po/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/read/registry/SubtreeReader.java | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/v3po/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/read/registry/SubtreeReader.java b/v3po/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/read/registry/SubtreeReader.java deleted file mode 100644 index 50a20656e..000000000 --- a/v3po/translate-utils/src/main/java/io/fd/honeycomb/v3po/translate/util/read/registry/SubtreeReader.java +++ /dev/null @@ -1,250 +0,0 @@ -/* - * 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.v3po.translate.util.read.registry; - -import static com.google.common.base.Preconditions.checkArgument; - -import com.google.common.base.Optional; -import com.google.common.base.Predicate; -import com.google.common.collect.Iterables; -import io.fd.honeycomb.v3po.translate.read.ListReader; -import io.fd.honeycomb.v3po.translate.read.ReadContext; -import io.fd.honeycomb.v3po.translate.read.ReadFailedException; -import io.fd.honeycomb.v3po.translate.read.Reader; -import io.fd.honeycomb.v3po.translate.util.RWUtils; -import io.fd.honeycomb.v3po.translate.util.ReflectionUtils; -import java.lang.reflect.InvocationTargetException; -import java.lang.reflect.Method; -import java.util.Collections; -import java.util.HashSet; -import java.util.List; -import java.util.Set; -import javax.annotation.Nonnull; -import javax.annotation.Nullable; -import org.opendaylight.yangtools.concepts.Builder; -import org.opendaylight.yangtools.yang.binding.DataObject; -import org.opendaylight.yangtools.yang.binding.Identifiable; -import org.opendaylight.yangtools.yang.binding.Identifier; -import org.opendaylight.yangtools.yang.binding.InstanceIdentifier; -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -/** - * Simple Reader delegate for subtree Readers (Readers handling also children nodes) providing a list of all the - * children nodes being handled. - */ -class SubtreeReader<D extends DataObject, B extends Builder<D>> implements Reader<D, B> { - - private static final Logger LOG = LoggerFactory.getLogger(SubtreeReader.class); - - private final Reader<D, B> delegate; - private final Set<InstanceIdentifier<?>> handledChildTypes = new HashSet<>(); - - private SubtreeReader(final Reader<D, B> delegate, Set<InstanceIdentifier<?>> handledTypes) { - this.delegate = delegate; - for (InstanceIdentifier<?> handledType : handledTypes) { - // Iid has to start with Reader's handled root type - checkArgument(delegate.getManagedDataObjectType().getTargetType().equals( - handledType.getPathArguments().iterator().next().getType()), - "Handled node from subtree has to be identified by an instance identifier starting from: %s." - + "Instance identifier was: %s", getManagedDataObjectType().getTargetType(), handledType); - checkArgument(Iterables.size(handledType.getPathArguments()) > 1, - "Handled node from subtree identifier too short: %s", handledType); - handledChildTypes.add(InstanceIdentifier.create(Iterables.concat( - getManagedDataObjectType().getPathArguments(), Iterables.skip(handledType.getPathArguments(), 1)))); - } - } - - /** - * Return set of types also handled by this Reader. All of the types are children of the type managed by this Reader - * excluding the type of this Reader. - */ - Set<InstanceIdentifier<?>> getHandledChildTypes() { - return handledChildTypes; - } - - @Override - @Nonnull - public Optional<? extends DataObject> read( - @Nonnull final InstanceIdentifier<? extends DataObject> id, - @Nonnull final ReadContext ctx) throws ReadFailedException { - final InstanceIdentifier<?> wildcarded = RWUtils.makeIidWildcarded(id); - - // Reading entire subtree and filtering if is current reader responsible - if (getHandledChildTypes().contains(wildcarded)) { - LOG.debug("{}: Subtree node managed by this writer requested: {}. Reading current and filtering", this, id); - // If there's no dedicated reader, use read current - final InstanceIdentifier<D> currentId = RWUtils.cutId(id, getManagedDataObjectType()); - final Optional<? extends DataObject> current = delegate.read(currentId, ctx); - // then perform post-reading filtering (return only requested sub-node) - final Optional<? extends DataObject> readSubtree = current.isPresent() - ? filterSubtree(current.get(), id, getManagedDataObjectType().getTargetType()) - : current; - - LOG.debug("{}: Subtree: {} read successfully. Result: {}", this, id, readSubtree); - return readSubtree; - - // Fallback solution, try delegate, maybe it can read the ID - } else { - return delegate.read(id, ctx); - } - } - - @Override - public void readCurrentAttributes(@Nonnull final InstanceIdentifier<D> id, @Nonnull final B builder, - @Nonnull final ReadContext ctx) - throws ReadFailedException { - delegate.readCurrentAttributes(id, builder, ctx); - } - - @Nonnull - @Override - public B getBuilder(final InstanceIdentifier<D> id) { - return delegate.getBuilder(id); - } - - @Override - public void merge(@Nonnull final Builder<? extends DataObject> parentBuilder, @Nonnull final D readValue) { - delegate.merge(parentBuilder, readValue); - } - - @Nonnull - private static Optional<? extends DataObject> filterSubtree(@Nonnull final DataObject parent, - @Nonnull final InstanceIdentifier<? extends DataObject> absolutPath, - @Nonnull final Class<?> managedType) { - final InstanceIdentifier.PathArgument nextId = - RWUtils.getNextId(absolutPath, InstanceIdentifier.create(parent.getClass())); - - final Optional<? extends DataObject> nextParent = findNextParent(parent, nextId, managedType); - - if (Iterables.getLast(absolutPath.getPathArguments()).equals(nextId)) { - return nextParent; // we found the dataObject identified by absolutePath - } else if (nextParent.isPresent()) { - return filterSubtree(nextParent.get(), absolutPath, nextId.getType()); - } else { - return nextParent; // we can't go further, return Optional.absent() - } - } - - private static Optional<? extends DataObject> findNextParent(@Nonnull final DataObject parent, - @Nonnull final InstanceIdentifier.PathArgument nextId, - @Nonnull final Class<?> managedType) { - // TODO is there a better way than reflection ? e.g. convert into NN and filter out with a utility - Optional<Method> method = ReflectionUtils.findMethodReflex(managedType, "get", - Collections.emptyList(), nextId.getType()); - - if (method.isPresent()) { - return Optional.fromNullable(filterSingle(parent, nextId, method.get())); - } else { - // List child nodes - method = ReflectionUtils.findMethodReflex(managedType, - "get" + nextId.getType().getSimpleName(), Collections.emptyList(), List.class); - - if (method.isPresent()) { - return filterList(parent, nextId, method.get()); - } else { - throw new IllegalStateException( - "Unable to filter " + nextId + " from " + parent + " getters not found using reflexion"); - } - } - } - - @SuppressWarnings("unchecked") - private static Optional<? extends DataObject> filterList(final DataObject parent, - final InstanceIdentifier.PathArgument nextId, - final Method method) { - final List<? extends DataObject> invoke = (List<? extends DataObject>) invoke(method, nextId, parent); - - checkArgument(nextId instanceof InstanceIdentifier.IdentifiableItem<?, ?>, - "Unable to perform wildcarded read for %s", nextId); - final Identifier key = ((InstanceIdentifier.IdentifiableItem) nextId).getKey(); - // TODO replace with stream().filter().findFirst() when we switch to using java's Optional instead of Guava's - // because now we would have to do awkward Optional transformation since findFirstReturns guava's optional - return Iterables.tryFind(invoke, new Predicate<DataObject>() { - - @Override - public boolean apply(@Nullable final DataObject input) { - final Optional<Method> keyGetter = ReflectionUtils.findMethodReflex(nextId.getType(), "get", - Collections.emptyList(), key.getClass()); - final Object actualKey; - actualKey = invoke(keyGetter.get(), nextId, input); - return key.equals(actualKey); - } - }); - } - - private static DataObject filterSingle(final DataObject parent, - final InstanceIdentifier.PathArgument nextId, final Method method) { - return nextId.getType().cast(invoke(method, nextId, parent)); - } - - private static Object invoke(final Method method, - final InstanceIdentifier.PathArgument nextId, final DataObject parent) { - try { - return method.invoke(parent); - } catch (IllegalAccessException | InvocationTargetException e) { - throw new IllegalArgumentException("Unable to get " + nextId + " from " + parent, e); - } - } - - @Override - @Nonnull - public InstanceIdentifier<D> getManagedDataObjectType() { - return delegate.getManagedDataObjectType(); - } - - /** - * Wrap a Reader as a subtree Reader. - */ - static <D extends DataObject, B extends Builder<D>> Reader<D, B> createForReader(@Nonnull final Set<InstanceIdentifier<?>> handledChildren, - @Nonnull final Reader<D, B> reader) { - return (reader instanceof ListReader) - ? new SubtreeListReader<>((ListReader) reader, handledChildren) - : new SubtreeReader<>(reader, handledChildren); - } - - private static final class SubtreeListReader<D extends DataObject & Identifiable<K>, B extends Builder<D>, K extends Identifier<D>> - extends SubtreeReader<D, B> implements ListReader<D, K, B> { - - private final ListReader<D, K, B> delegate; - - private SubtreeListReader(final ListReader<D, K, B> delegate, - final Set<InstanceIdentifier<?>> handledTypes) { - super(delegate, handledTypes); - this.delegate = delegate; - } - - @Nonnull - @Override - public List<D> readList(@Nonnull final InstanceIdentifier<D> id, @Nonnull final ReadContext ctx) - throws ReadFailedException { - return delegate.readList(id, ctx); - } - - @Override - public void merge(@Nonnull final Builder<? extends DataObject> builder, @Nonnull final List<D> readData) { - delegate.merge(builder, readData); - } - - @Override - public List<K> getAllIds(@Nonnull final InstanceIdentifier<D> id, - @Nonnull final ReadContext ctx) throws ReadFailedException { - return delegate.getAllIds(id, ctx); - } - } - -} |