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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.translate.impl.write;
import io.fd.honeycomb.translate.write.WriteContext;
import io.fd.honeycomb.translate.spi.write.WriterCustomizer;
import io.fd.honeycomb.translate.util.write.AbstractGenericWriter;
import io.fd.honeycomb.translate.write.WriteFailedException;
import javax.annotation.Nonnull;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Generic writer with customizable behavior thanks to injected customizer.
*/
public final class GenericWriter<D extends DataObject> extends AbstractGenericWriter<D> {
private static final Logger LOG = LoggerFactory.getLogger(GenericWriter.class);
private static final String UPDATE_M = "updateCurrentAttributes";
private final WriterCustomizer<D> customizer;
public GenericWriter(@Nonnull final InstanceIdentifier<D> type,
@Nonnull final WriterCustomizer<D> customizer) {
super(type, isUpdateSupported(customizer));
this.customizer = customizer;
}
static boolean isUpdateSupported(final @Nonnull WriterCustomizer<?> customizer) {
try {
// if customizer overrides updateCurrentAttributes method, it will be used, otherwise updates will be broken into individual
// delete + create pairs
final Class<? extends WriterCustomizer> customizerClass = customizer.getClass();
final Class<?> updateDeclaringClass = customizerClass
.getMethod(UPDATE_M, InstanceIdentifier.class, DataObject.class, DataObject.class, WriteContext.class)
.getDeclaringClass();
final boolean supportsUpdate = !WriterCustomizer.class.equals(updateDeclaringClass);
LOG.debug("Customizer {} update support : {}|Update declaring class {}", customizerClass, supportsUpdate,
updateDeclaringClass);
return supportsUpdate;
} catch (NoSuchMethodException e) {
throw new IllegalStateException("Unable to detect if customizer supports update", e);
}
}
@Override
protected void writeCurrentAttributes(@Nonnull final InstanceIdentifier<D> id, @Nonnull final D data,
@Nonnull final WriteContext ctx) throws WriteFailedException {
try {
customizer.writeCurrentAttributes(id, data, ctx);
} catch (RuntimeException e) {
throw new WriteFailedException.CreateFailedException(id, data, e);
}
}
@Override
protected void deleteCurrentAttributes(@Nonnull final InstanceIdentifier<D> id, @Nonnull final D dataBefore,
@Nonnull final WriteContext ctx) throws WriteFailedException {
try {
customizer.deleteCurrentAttributes(id, dataBefore, ctx);
} catch (RuntimeException e) {
throw new WriteFailedException.DeleteFailedException(id, e);
}
}
@Override
protected void updateCurrentAttributes(@Nonnull final InstanceIdentifier<D> id,
@Nonnull final D dataBefore,
@Nonnull final D dataAfter,
@Nonnull final WriteContext ctx) throws WriteFailedException {
try {
customizer.updateCurrentAttributes(id, dataBefore, dataAfter, ctx);
} catch (RuntimeException e) {
throw new WriteFailedException.UpdateFailedException(id, dataBefore, dataAfter, e);
}
}
}
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