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/*
* 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.impl.trans.impl;
import com.google.common.annotations.Beta;
import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
import io.fd.honeycomb.v3po.impl.trans.ChildVppReader;
import io.fd.honeycomb.v3po.impl.trans.impl.spi.ListVppReaderCustomizer;
import io.fd.honeycomb.v3po.impl.trans.util.VppReaderUtils;
import java.util.Collections;
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.Augmentation;
import org.opendaylight.yangtools.yang.binding.ChildOf;
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;
@Beta
@ThreadSafe
public final class CompositeListVppReader<C extends DataObject & Identifiable<K>, K extends Identifier<C>, B extends Builder<C>>
extends AbstractCompositeVppReader<C, B> implements ChildVppReader<C> {
private ListVppReaderCustomizer<C, K, B> customizer;
public CompositeListVppReader(@Nonnull final Class<C> managedDataObjectType,
@Nonnull final List<ChildVppReader<? extends ChildOf<C>>> childReaders,
@Nonnull final List<ChildVppReader<? extends Augmentation<C>>> augReaders,
@Nonnull final ListVppReaderCustomizer<C, K, B> customizer) {
super(managedDataObjectType, childReaders, augReaders);
this.customizer = customizer;
}
public CompositeListVppReader(@Nonnull final Class<C> managedDataObjectType,
@Nonnull final List<ChildVppReader<? extends ChildOf<C>>> childReaders,
@Nonnull final ListVppReaderCustomizer<C, K, B> customizer) {
this(managedDataObjectType, childReaders, VppReaderUtils.<C>emptyAugReaderList(), customizer);
}
public CompositeListVppReader(@Nonnull final Class<C> managedDataObjectType,
@Nonnull final ListVppReaderCustomizer<C, K, B> customizer) {
this(managedDataObjectType, VppReaderUtils.<C>emptyChildReaderList(), VppReaderUtils.<C>emptyAugReaderList(),
customizer);
}
@Override
protected List<C> readCurrent(@Nonnull final InstanceIdentifier<C> id) {
if(shouldReadAll(id)) {
return readList(id);
}
return super.readCurrent(id);
}
@Override
public void read(@Nonnull final InstanceIdentifier<? extends DataObject> id,
@Nonnull final Builder<? extends DataObject> parentBuilder) {
final InstanceIdentifier<C> currentId = getCurrentId(id);
final List<C> ifcs;
if (shouldReadAll(id)) {
ifcs = readList(currentId);
} else {
final Optional<? extends DataObject> readSingle = Optional.fromNullable(read(id).get(0));
final Optional<C> read = readSingle.transform(new Function<DataObject, C>() {
@Override
public C apply(final DataObject input) {
Preconditions.checkArgument(getManagedDataObjectType().getTargetType().isAssignableFrom(input.getClass()));
return getManagedDataObjectType().getTargetType().cast(input);
}
});
ifcs = read.isPresent() ? Collections.singletonList(read.get()) : Collections.<C>emptyList();
}
customizer.merge(parentBuilder, ifcs);
}
private List<C> readList(@Nonnull final InstanceIdentifier<C> id) {
Preconditions.checkArgument(id.getTargetType().equals(getManagedDataObjectType().getTargetType()),
"Id %s does not contain expected type %s", id, getManagedDataObjectType());
return Lists.transform(customizer.getAllIds(id), new Function<InstanceIdentifier<? extends DataObject>, C>() {
@Override
public C apply(final InstanceIdentifier<? extends DataObject> input) {
final List<? extends DataObject> read = read(input);
Preconditions.checkState(read.size() == 1);
Preconditions.checkArgument(getManagedDataObjectType().getTargetType().isAssignableFrom(read.get(0).getClass()));
return getManagedDataObjectType().getTargetType().cast(read.get(0));
}
});
}
private boolean shouldReadAll(@Nonnull final InstanceIdentifier<? extends DataObject> id) {
final InstanceIdentifier instanceIdentifier = id.firstIdentifierOf(getManagedDataObjectType().getTargetType());
return instanceIdentifier == null || instanceIdentifier.isWildcarded();
}
@Override
protected void readCurrentAttributes(@Nonnull final InstanceIdentifier<C> id, @Nonnull final B builder) {
customizer.readCurrentAttributes(id, builder);
}
@Override
protected B getBuilder(@Nonnull final InstanceIdentifier<? extends DataObject> id) {
return customizer.getBuilder(id.firstKeyOf(getManagedDataObjectType().getTargetType()));
}
}
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