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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* 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
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package org.apache.cayenne.dbsync.merge;
import java.util.Collection;
import java.util.List;
import org.apache.cayenne.dbsync.merge.factory.MergerTokenFactory;
import org.apache.cayenne.dbsync.merge.token.MergerToken;
import org.apache.cayenne.map.DataMap;
class ChainMerger<T, M> extends AbstractMerger<T, M> {
private final AbstractMerger<T, M> merger;
private final AbstractMerger<?, T> parentMerger;
ChainMerger(MergerTokenFactory tokenFactory, AbstractMerger<T, M> merger, AbstractMerger<?, T> parentMerger) {
super(tokenFactory);
this.merger = merger;
this.parentMerger = parentMerger;
}
@Override
public List<MergerToken> createMergeTokens() {
return createMergeTokens(null, null);
}
@Override
MergerDictionaryDiff<M> createDiff(T unused1, T unused2) {
MergerDictionaryDiff<M> diff = new MergerDictionaryDiff<>();
MergerDictionaryDiff<T> parentDiff = parentMerger.getDiff();
merger.setOriginalDictionary(parentMerger.getOriginalDictionary());
for(MergerDiffPair<T> pair : parentDiff.getSame()) {
diff.addAll(merger.createDiff(pair.getOriginal(), pair.getImported()));
}
return diff;
}
@Override
Collection<MergerToken> createTokensForMissingOriginal(M imported) {
return merger.createTokensForMissingOriginal(imported);
}
@Override
Collection<MergerToken> createTokensForMissingImported(M original) {
return merger.createTokensForMissingImported(original);
}
@Override
Collection<MergerToken> createTokensForSame(MergerDiffPair<M> same) {
return merger.createTokensForSame(same);
}
}