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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.write;
import com.google.common.annotations.Beta;
import com.google.common.base.Optional;
import io.fd.honeycomb.translate.ModificationContext;
import javax.annotation.Nonnull;
import org.opendaylight.yangtools.yang.binding.DataObject;
import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
/**
* Context providing information about current state of DataTree to writers
*/
@Beta
public interface WriteContext extends ModificationContext {
/**
* Read any config data object before current modification was applied
*
* @param currentId Id of an object to read
*
* @return Data before the modification was applied
*/
<T extends DataObject> Optional<T> readBefore(@Nonnull final InstanceIdentifier<T> currentId);
/**
* Read any config data object from current modification
*
* @param currentId Id of an object to read
*
* @return Data from the modification
*/
<T extends DataObject> Optional<T> readAfter(@Nonnull final InstanceIdentifier<T> currentId);
}
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