/*
* Copyright (C) 2014 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.core.configuration;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import lombok.core.configuration.ConfigurationSource.ListModification;
import lombok.core.configuration.ConfigurationSource.Result;
public class BubblingConfigurationResolver implements ConfigurationResolver {
private final Iterable<ConfigurationSource> sources;
public BubblingConfigurationResolver(Iterable<ConfigurationSource> sources) {
this.sources = sources;
}
@SuppressWarnings("unchecked")
@Override
public <T> T resolve(ConfigurationKey<T> key) {
boolean isList = key.getType().isList();
List<List<ListModification>> listModificationsList = null;
for (ConfigurationSource source : sources) {
Result result = source.resolve(key);
if (result == null) continue;
if (isList) {
if (listModificationsList == null) listModificationsList = new ArrayList<List<ListModification>>();
listModificationsList.add((List<ListModification>)result.getValue());
}
if (result.isAuthoritative()) {
if (isList) break;
return (T) result.getValue();
}
}
if (!isList) return null;
if (listModificationsList == null) return (T) Collections.emptyList();
List<Object> listValues = new ArrayList<Object>();
Collections.reverse(listModificationsList);
for (List<ListModification> listModifications : listModificationsList) {
if (listModifications != null) for (ListModification modification : listModifications) {
listValues.remove(modification.getValue());
if (modification.isAdded()) listValues.add(modification.getValue());
}
}
return (T) listValues;
}
}