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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.util;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import io.fd.honeycomb.v3po.impl.trans.ChildVppReader;
import java.lang.reflect.Method;
import java.util.Collections;
import java.util.List;
import javax.annotation.Nonnull;
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;
public final class VppReaderUtils {
private VppReaderUtils() {}
/**
* Find next item in ID after provided type
*/
@Nonnull
public static InstanceIdentifier.PathArgument getNextId(@Nonnull final InstanceIdentifier<? extends DataObject> id,
@Nonnull final InstanceIdentifier<? extends DataObject> type) {
// TODO this is inefficient(maybe, depending on actual Iterable type)
final Iterable<InstanceIdentifier.PathArgument> pathArguments = id.getPathArguments();
final int i = Iterables.indexOf(pathArguments, new Predicate<InstanceIdentifier.PathArgument>() {
@Override
public boolean apply(final InstanceIdentifier.PathArgument input) {
return input.getType().isAssignableFrom(type.getTargetType());
}
});
Preconditions.checkArgument(i >= 0, "Unable to find %s type in %s", type.getTargetType(), id);
return Iterables.get(pathArguments, i + 1);
}
public static <T> List<ChildVppReader<? extends ChildOf<T>>> emptyChildReaderList() {
return Collections.emptyList();
}
public static <T> List<ChildVppReader<? extends Augmentation<T>>> emptyAugReaderList() {
return Collections.emptyList();
}
public static <T> List<ChildVppReader<? extends Augmentation<T>>> singletonAugReaderList(
ChildVppReader<? extends Augmentation<T>> item) {
return Collections.<ChildVppReader<? extends Augmentation<T>>>singletonList(item);
}
public static <T> List<ChildVppReader<? extends ChildOf<T>>> singletonChildReaderList(
ChildVppReader<? extends ChildOf<T>> item) {
return Collections.<ChildVppReader<? extends ChildOf<T>>>singletonList(item);
}
/**
* Replace last item in ID with a provided IdentifiableItem of the same type
*/
@SuppressWarnings("unchecked")
@Nonnull
public static <D extends DataObject & Identifiable<K>, K extends Identifier<D>> InstanceIdentifier<D> getCurrentId(
@Nonnull final InstanceIdentifier<D> id, final InstanceIdentifier.IdentifiableItem<D, K> currentBdItem) {
final Iterable<InstanceIdentifier.PathArgument> pathArguments = id.getPathArguments();
final Iterable<InstanceIdentifier.PathArgument> withoutCurrent =
Iterables.limit(pathArguments, Iterables.size(pathArguments) - 1);
final Iterable<InstanceIdentifier.PathArgument> concat =
Iterables.concat(withoutCurrent, Collections.singleton(currentBdItem));
return (InstanceIdentifier<D>) InstanceIdentifier.create(concat);
}
/**
* Create IdentifiableItem from target type of provided ID with provided key
*/
@Nonnull
public static <D extends DataObject & Identifiable<K>, K extends Identifier<D>> InstanceIdentifier.IdentifiableItem<D, K> getCurrentIdItem(
@Nonnull final InstanceIdentifier<D> id, final K key) {
return new InstanceIdentifier.IdentifiableItem<>(id.getTargetType(), key);
}
/**
* Trim InstanceIdentifier at indexOf(type)
*/
@SuppressWarnings("unchecked")
@Nonnull
public static <D extends DataObject> InstanceIdentifier<D> cutId(@Nonnull final InstanceIdentifier<? extends DataObject> id,
@Nonnull final InstanceIdentifier<D> type) {
final Iterable<InstanceIdentifier.PathArgument> pathArguments = id.getPathArguments();
final int i = Iterables.indexOf(pathArguments, new Predicate<InstanceIdentifier.PathArgument>() {
@Override
public boolean apply(final InstanceIdentifier.PathArgument input) {
return input.getType().equals(type.getTargetType());
}
});
Preconditions.checkArgument(i >= 0, "ID %s does not contain %s", id, type);
return (InstanceIdentifier<D>) InstanceIdentifier.create(Iterables.limit(pathArguments, i + 1));
}
/**
* Find a specific method using reflection
*/
@Nonnull
public static Optional<Method> findMethodReflex(@Nonnull final Class<?> managedType,
@Nonnull final String prefix,
@Nonnull final List<Class<?>> paramTypes,
@Nonnull final Class<?> retType) {
top:
for (Method method : managedType.getMethods()) {
if (!method.getName().toLowerCase().startsWith(prefix.toLowerCase())) {
continue;
}
final Class<?>[] parameterTypes = method.getParameterTypes();
if (parameterTypes.length != paramTypes.size()) {
continue;
}
for (int i = 0; i < parameterTypes.length; i++) {
if (!parameterTypes[i].isAssignableFrom(paramTypes.get(i))) {
continue top;
}
}
if (!method.getReturnType().equals(retType)) {
continue;
}
return Optional.of(method);
}
return Optional.absent();
}
}
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