/*
* Copyright 2008-2009 LinkedIn, Inc
*
* 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.sdnplatform.sync.internal.version;
import java.util.ArrayList;
import java.util.List;
import org.sdnplatform.sync.IInconsistencyResolver;
/**
* Apply the given inconsistency resolvers in order until there are 1 or fewer
* items left.
*
*
*/
public class ChainedResolver<T> implements IInconsistencyResolver<T> {
private List<IInconsistencyResolver<T>> resolvers;
@SafeVarargs
public ChainedResolver(IInconsistencyResolver<T>... resolvers) {
this.resolvers = new ArrayList<IInconsistencyResolver<T>>(resolvers.length);
for(IInconsistencyResolver<T> resolver: resolvers)
this.resolvers.add(resolver);
}
public List<T> resolveConflicts(List<T> items) {
for(IInconsistencyResolver<T> resolver: resolvers) {
if(items.size() <= 1)
return items;
else
items = resolver.resolveConflicts(items);
}
return items;
}
@Override
public boolean equals(Object o) {
if(this == o)
return true;
if(o == null || getClass() != o.getClass())
return false;
ChainedResolver<?> that = (ChainedResolver<?>) o;
if(resolvers != null
? !resolvers.equals(that.resolvers)
: that.resolvers != null)
return false;
return true;
}
@Override
public int hashCode() {
return resolvers != null ? resolvers.hashCode() : 0;
}
}