package com.browseengine.bobo.facets.impl;
import java.io.IOException;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import org.apache.lucene.search.Explanation;
import com.browseengine.bobo.api.BoboSegmentReader;
import com.browseengine.bobo.api.BrowseSelection;
import com.browseengine.bobo.api.FacetSpec;
import com.browseengine.bobo.facets.FacetCountCollector;
import com.browseengine.bobo.facets.FacetCountCollectorSource;
import com.browseengine.bobo.facets.FacetHandler;
import com.browseengine.bobo.facets.data.FacetDataCache;
import com.browseengine.bobo.facets.data.TermListFactory;
import com.browseengine.bobo.facets.filter.AdaptiveFacetFilter;
import com.browseengine.bobo.facets.filter.AdaptiveFacetFilter.FacetDataCacheBuilder;
import com.browseengine.bobo.facets.filter.EmptyFilter;
import com.browseengine.bobo.facets.filter.FacetFilter;
import com.browseengine.bobo.facets.filter.FacetOrFilter;
import com.browseengine.bobo.facets.filter.RandomAccessFilter;
import com.browseengine.bobo.facets.filter.RandomAccessNotFilter;
import com.browseengine.bobo.query.scoring.BoboDocScorer;
import com.browseengine.bobo.query.scoring.FacetScoreable;
import com.browseengine.bobo.query.scoring.FacetTermScoringFunctionFactory;
import com.browseengine.bobo.sort.DocComparatorSource;
import com.browseengine.bobo.util.BigIntArray;
public class SimpleFacetHandler extends FacetHandler<FacetDataCache<?>> implements FacetScoreable {
@SuppressWarnings("rawtypes")
protected TermListFactory _termListFactory;
protected final String _indexFieldName;
public SimpleFacetHandler(String name, String indexFieldName, TermListFactory<?> termListFactory,
Set<String> dependsOn) {
super(name, dependsOn);
_indexFieldName = indexFieldName;
_termListFactory = termListFactory;
}
public SimpleFacetHandler(String name, TermListFactory<?> termListFactory, Set<String> dependsOn) {
this(name, name, termListFactory, dependsOn);
}
public SimpleFacetHandler(String name, String indexFieldName, TermListFactory<?> termListFactory) {
this(name, indexFieldName, termListFactory, null);
}
public SimpleFacetHandler(String name, TermListFactory<?> termListFactory) {
this(name, name, termListFactory);
}
public SimpleFacetHandler(String name) {
this(name, name, null);
}
public SimpleFacetHandler(String name, String indexFieldName) {
this(name, indexFieldName, null);
}
@Override
public int getNumItems(BoboSegmentReader reader, int id) {
FacetDataCache<?> data = getFacetData(reader);
if (data == null) return 0;
return data.getNumItems(id);
}
@Override
public DocComparatorSource getDocComparatorSource() {
return new FacetDataCache.FacetDocComparatorSource(this);
}
@Override
public String[] getFieldValues(BoboSegmentReader reader, int id) {
FacetDataCache<?> dataCache = getFacetData(reader);
if (dataCache != null) {
return new String[] { dataCache.valArray.get(dataCache.orderArray.get(id)) };
}
return new String[0];
}
@Override
public Object[] getRawFieldValues(BoboSegmentReader reader, int id) {
FacetDataCache<?> dataCache = getFacetData(reader);
if (dataCache != null) {
return new Object[] { dataCache.valArray.getRawValue(dataCache.orderArray.get(id)) };
}
return new String[0];
}
@Override
public RandomAccessFilter buildRandomAccessFilter(String value, Properties prop)
throws IOException {
FacetFilter f = new FacetFilter(this, value);
AdaptiveFacetFilter af = new AdaptiveFacetFilter(new FacetDataCacheBuilder() {
@Override
public FacetDataCache<?> build(BoboSegmentReader reader) {
return getFacetData(reader);
}
@Override
public String getName() {
return SimpleFacetHandler.this.getName();
}
@Override
public String getIndexFieldName() {
return _indexFieldName;
}
}, f, new String[] { value }, false);
return af;
}
@Override
public RandomAccessFilter buildRandomAccessAndFilter(String[] vals, Properties prop)
throws IOException {
if (vals.length > 1) {
return EmptyFilter.getInstance();
} else {
return buildRandomAccessFilter(vals[0], prop);
}
}
@Override
public RandomAccessFilter buildRandomAccessOrFilter(String[] vals, Properties prop, boolean isNot)
throws IOException {
RandomAccessFilter filter = null;
if (vals.length > 1) {
RandomAccessFilter f = new FacetOrFilter(this, vals, false);
filter = new AdaptiveFacetFilter(new FacetDataCacheBuilder() {
@Override
public FacetDataCache<?> build(BoboSegmentReader reader) {
return getFacetData(reader);
}
@Override
public String getName() {
return SimpleFacetHandler.this.getName();
}
@Override
public String getIndexFieldName() {
return _indexFieldName;
}
}, f, vals, isNot);
} else if (vals.length == 1) {
filter = buildRandomAccessFilter(vals[0], prop);
} else {
filter = EmptyFilter.getInstance();
}
if (isNot) {
filter = new RandomAccessNotFilter(filter);
}
return filter;
}
@Override
public FacetCountCollectorSource getFacetCountCollectorSource(final BrowseSelection sel,
final FacetSpec ospec) {
return getFacetCountCollectorSource(sel, ospec, false);
}
@Override
public FacetCountCollectorSource getFacetCountCollectorSource(final BrowseSelection sel,
final FacetSpec ospec, final boolean groupMode) {
if (groupMode) {
return new FacetCountCollectorSource() {
@Override
public FacetCountCollector getFacetCountCollector(BoboSegmentReader reader, int docBase) {
FacetDataCache<?> dataCache = SimpleFacetHandler.this.getFacetData(reader);
return new SimpleGroupByFacetCountCollector(_name, dataCache, docBase, sel, ospec);
}
};
} else {
return new FacetCountCollectorSource() {
@Override
public FacetCountCollector getFacetCountCollector(BoboSegmentReader reader, int docBase) {
FacetDataCache<?> dataCache = SimpleFacetHandler.this.getFacetData(reader);
return new SimpleFacetCountCollector(_name, dataCache, docBase, sel, ospec);
}
};
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public FacetDataCache load(BoboSegmentReader reader) throws IOException {
FacetDataCache<?> dataCache = new FacetDataCache();
dataCache.load(_indexFieldName, reader, _termListFactory);
return dataCache;
}
@Override
public BoboDocScorer getDocScorer(BoboSegmentReader reader,
FacetTermScoringFunctionFactory scoringFunctionFactory, Map<String, Float> boostMap) {
FacetDataCache<?> dataCache = getFacetData(reader);
float[] boostList = BoboDocScorer.buildBoostList(dataCache.valArray, boostMap);
return new SimpleBoboDocScorer(dataCache, scoringFunctionFactory, boostList);
}
public static final class SimpleFacetCountCollector extends DefaultFacetCountCollector {
public SimpleFacetCountCollector(String name, FacetDataCache<?> dataCache, int docBase,
BrowseSelection sel, FacetSpec ospec) {
super(name, dataCache, docBase, sel, ospec);
}
@Override
public final void collect(int docid) {
int index = _array.get(docid);
_count.add(index, _count.get(index) + 1);
}
@Override
public final void collectAll() {
_count = BigIntArray.fromArray(_dataCache.freqs);
}
}
public static final class SimpleGroupByFacetCountCollector extends GroupByFacetCountCollector {
protected int _totalGroups;
public SimpleGroupByFacetCountCollector(String name, FacetDataCache<?> dataCache, int docBase,
BrowseSelection sel, FacetSpec ospec) {
super(name, dataCache, docBase, sel, ospec);
_totalGroups = 0;
}
@Override
public final void collect(int docid) {
int index = _array.get(docid);
int newValue = _count.get(index) + 1;
_count.add(index, newValue);
if (newValue <= 1) ++_totalGroups;
}
@Override
public final void collectAll() {
_count = BigIntArray.fromArray(_dataCache.freqs);
_totalGroups = -1;
}
@Override
public final int getTotalGroups() {
if (_totalGroups >= 0) return _totalGroups;
// If the user calls collectAll instead of collect, we have to collect all the groups here:
_totalGroups = 0;
for (int i = 0; i < _count.size(); i++) {
int c = _count.get(i);
if (c > 0) ++_totalGroups;
}
return _totalGroups;
}
}
public static final class SimpleBoboDocScorer extends BoboDocScorer {
protected final FacetDataCache<?> _dataCache;
public SimpleBoboDocScorer(FacetDataCache<?> dataCache,
FacetTermScoringFunctionFactory scoreFunctionFactory, float[] boostList) {
super(scoreFunctionFactory.getFacetTermScoringFunction(dataCache.valArray.size(),
dataCache.orderArray.size()), boostList);
_dataCache = dataCache;
}
@Override
public Explanation explain(int doc) {
int idx = _dataCache.orderArray.get(doc);
return _function.explain(_dataCache.freqs[idx], _boostList[idx]);
}
@Override
public final float score(int docid) {
int idx = _dataCache.orderArray.get(docid);
return _function.score(_dataCache.freqs[idx], _boostList[idx]);
}
}
}