diff options
author | Maros Marsalek <mmarsale@cisco.com> | 2016-07-13 11:52:51 +0200 |
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committer | Maros Marsalek <mmarsale@cisco.com> | 2016-07-21 14:18:59 +0200 |
commit | 4e6b846c342b2c9e9443e3d3472685e5acb32fa3 (patch) | |
tree | df8990c71077f8561b94c6055dfe3e2b59fa32e3 /v3po/translate-impl/src/main/java/io/fd/honeycomb/v3po/translate/impl/read/GenericListReader.java | |
parent | 758f3cc154d28df97b3995344e0c67190c50a035 (diff) |
HONEYCOMB-122 Update reader registry to share similar APIs as writer
+ Extract common registry builder base code
(Reader registry is not flat, so there is not full control over ordering as with writers
but it is sufficient)
+ Split CompositeReader into CompositeReader, SubtreeReader and GenericReader
+ No need to build composite structure in ReaderFactories (registry does that internally)
+ Keep only ReaderCustomizer + ListReaderCustomizer, no root reader (same for writers)
Change-Id: Ic4e5bc96ad47a6cbcada4efcc2209db5c16d2a6c
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>
Diffstat (limited to 'v3po/translate-impl/src/main/java/io/fd/honeycomb/v3po/translate/impl/read/GenericListReader.java')
-rw-r--r-- | v3po/translate-impl/src/main/java/io/fd/honeycomb/v3po/translate/impl/read/GenericListReader.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/v3po/translate-impl/src/main/java/io/fd/honeycomb/v3po/translate/impl/read/GenericListReader.java b/v3po/translate-impl/src/main/java/io/fd/honeycomb/v3po/translate/impl/read/GenericListReader.java new file mode 100644 index 000000000..54dad5517 --- /dev/null +++ b/v3po/translate-impl/src/main/java/io/fd/honeycomb/v3po/translate/impl/read/GenericListReader.java @@ -0,0 +1,114 @@ +/* + * 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.impl.read; + +import static com.google.common.base.Preconditions.checkArgument; + +import com.google.common.annotations.Beta; +import com.google.common.base.Optional; +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.spi.read.ListReaderCustomizer; +import io.fd.honeycomb.v3po.translate.util.RWUtils; +import io.fd.honeycomb.v3po.translate.util.read.AbstractGenericReader; +import java.util.ArrayList; +import java.util.List; +import javax.annotation.Nonnull; +import javax.annotation.concurrent.ThreadSafe; +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; + +/** + * Composite implementation of {@link ListReader} able to place the read result into parent builder object intended + * for list node type. + * <p/> + * This reader checks if the IDs are wildcarded in which case it performs read of all list entries. In case the ID has a + * key, it reads only the specified value. + */ +@Beta +@ThreadSafe +public final class GenericListReader<C extends DataObject & Identifiable<K>, K extends Identifier<C>, B extends Builder<C>> + extends AbstractGenericReader<C, B> implements ListReader<C, K, B> { + + private static final Logger LOG = LoggerFactory.getLogger(GenericListReader.class); + + private final ListReaderCustomizer<C, K, B> customizer; + + /** + * Create new {@link GenericListReader} + * + * @param managedDataObjectType Class object for managed data type. Must come from a list node type. + * @param customizer Customizer instance to customize this generic reader + */ + public GenericListReader(@Nonnull final InstanceIdentifier<C> managedDataObjectType, + @Nonnull final ListReaderCustomizer<C, K, B> customizer) { + super(managedDataObjectType); + this.customizer = customizer; + } + + @Override + @Nonnull + public List<C> readList(@Nonnull final InstanceIdentifier<C> id, + @Nonnull final ReadContext ctx) throws ReadFailedException { + LOG.trace("{}: Reading all list entries", this); + final List<K> allIds = getAllIds(id, ctx); + LOG.debug("{}: Reading list entries for: {}", this, allIds); + + final ArrayList<C> allEntries = new ArrayList<>(allIds.size()); + for (K key : allIds) { + final InstanceIdentifier.IdentifiableItem<C, K> currentBdItem = RWUtils.getCurrentIdItem(id, key); + final InstanceIdentifier<C> keyedId = RWUtils.replaceLastInId(id, currentBdItem); + final Optional<C> read = readCurrent(keyedId, ctx); + if (read.isPresent()) { + final DataObject singleItem = read.get(); + checkArgument(getManagedDataObjectType().getTargetType().isAssignableFrom(singleItem.getClass())); + allEntries.add(getManagedDataObjectType().getTargetType().cast(singleItem)); + } + } + return allEntries; + } + + @Override + public List<K> getAllIds(@Nonnull final InstanceIdentifier<C> id, @Nonnull final ReadContext ctx) + throws ReadFailedException { + return customizer.getAllIds(id, ctx); + } + + @Override + public void merge(@Nonnull final Builder<? extends DataObject> builder, @Nonnull final List<C> readData) { + customizer.merge(builder, readData); + } + + @Override + public void readCurrentAttributes(@Nonnull final InstanceIdentifier<C> id, @Nonnull final B builder, + @Nonnull final ReadContext ctx) + throws ReadFailedException { + customizer.readCurrentAttributes(id, builder, ctx); + } + + @Override + public B getBuilder(@Nonnull final InstanceIdentifier<C> id) { + return customizer.getBuilder(id); + } + +} |