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/*
* Copyright 2014 Open Networking Laboratory
*
* 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 org.onosproject.net.flow;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* A list of BatchOperationEntry.
*
* @param <T> the enum of operators <br>
* This enum must be defined in each sub-classes.
*/
public abstract class BatchOperation<T extends BatchOperationEntry<?, ?>> {
private final List<T> ops;
/**
* Creates new {@link BatchOperation} object.
*/
public BatchOperation() {
ops = new LinkedList<>();
}
/**
* Creates {@link BatchOperation} object from a list of batch operation
* entries.
*
* @param batchOperations the list of batch operation entries.
*/
public BatchOperation(Collection<T> batchOperations) {
ops = new LinkedList<>(checkNotNull(batchOperations));
}
/**
* Removes all operations maintained in this object.
*/
public void clear() {
ops.clear();
}
/**
* Returns the number of operations in this object.
*
* @return the number of operations in this object
*/
public int size() {
return ops.size();
}
/**
* Returns the operations in this object.
*
* @return the operations in this object
*/
public List<T> getOperations() {
return Collections.unmodifiableList(ops);
}
/**
* Adds an operation.
* FIXME: Brian promises that the Intent Framework
* will not modify the batch operation after it has submitted it.
* Ali would prefer immutablity, but trusts brian for better or
* for worse.
*
* @param entry the operation to be added
* @return this object if succeeded, null otherwise
*/
public BatchOperation<T> addOperation(T entry) {
return ops.add(entry) ? this : null;
}
/**
* Add all operations from another batch to this batch.
*
* @param another another batch
* @return true if success
*/
public boolean addAll(BatchOperation<T> another) {
return ops.addAll(another.getOperations());
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null) {
return false;
}
if (getClass() != o.getClass()) {
return false;
}
BatchOperation<?> other = (BatchOperation<?>) o;
return this.ops.equals(other.ops);
}
@Override
public int hashCode() {
return ops.hashCode();
}
@Override
public String toString() {
return ops.toString();
}
}
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