/**
* This software is licensed to you under the Apache License, Version 2.0 (the
* "Apache License").
*
* LinkedIn's contributions are made under the Apache License. If you contribute
* to the Software, the contributions will be deemed to have been made under the
* Apache License, unless you expressly indicate otherwise. Please do not make any
* contributions that would be inconsistent with the Apache License.
*
* You may obtain a copy of the Apache License at http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, this software
* distributed under the Apache License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the Apache
* License for the specific language governing permissions and limitations for the
* software governed under the Apache License.
*
* © 2012 LinkedIn Corp. All Rights Reserved.
*/
package com.senseidb.indexing;
import java.io.IOException;
import java.util.List;
import com.browseengine.bobo.api.BoboIndexReader;
import com.browseengine.bobo.api.BrowseSelection;
import com.browseengine.bobo.facets.FacetHandler;
import com.browseengine.bobo.facets.filter.EmptyFilter;
import com.browseengine.bobo.facets.filter.RandomAccessFilter;
import com.senseidb.search.req.SenseiRequest;
public interface SenseiIndexPruner {
IndexReaderSelector getReaderSelector(SenseiRequest req);
void sort(List<BoboIndexReader> readers);
public interface IndexReaderSelector{
boolean isSelected(BoboIndexReader reader) throws IOException;
}
public static class DefaultSenseiIndexPruner implements SenseiIndexPruner{
@Override
public IndexReaderSelector getReaderSelector(SenseiRequest req) {
return new IndexReaderSelector(){
@Override
public boolean isSelected(BoboIndexReader reader)
throws IOException {
return true;
}
};
}
@Override
public void sort(List<BoboIndexReader> readers) {
// do nothing
}
}
public static class BoboSelectionSenseiIndexPruner implements SenseiIndexPruner{
@Override
public IndexReaderSelector getReaderSelector(final SenseiRequest req) {
return new IndexReaderSelector(){
@Override
public boolean isSelected(BoboIndexReader reader)
throws IOException {
BrowseSelection[] selections = req.getSelections();
boolean valid = true;
if (selections!=null){
for (BrowseSelection sel : selections){
String name = sel.getFieldName();
FacetHandler<?> handler = reader.getFacetHandler(name);
if (handler!=null){
RandomAccessFilter filter = handler.buildFilter(sel);
if (EmptyFilter.getInstance() == filter){
valid = false;
break;
}
}
}
}
return valid;
}
};
}
@Override
public void sort(List<BoboIndexReader> readers) {
// do nothing
}
}
}