org.elasticsearch.index.fielddata.plain.AbstractGeoPointIndexFieldData Maven / Gradle / Ivy
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.elasticsearch.index.fielddata.plain;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.BytesRefIterator;
import org.apache.lucene.util.CharsRef;
import org.apache.lucene.util.UnicodeUtil;
import org.elasticsearch.ElasticsearchIllegalArgumentException;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.common.geo.GeoPoint;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.Index;
import org.elasticsearch.index.fielddata.*;
import org.elasticsearch.index.fielddata.fieldcomparator.SortMode;
import org.elasticsearch.index.mapper.FieldMapper.Names;
import java.io.IOException;
abstract class AbstractGeoPointIndexFieldData extends AbstractIndexFieldData> implements IndexGeoPointFieldData> {
protected static class Empty extends AtomicGeoPointFieldData {
private final int numDocs;
Empty(int numDocs) {
this.numDocs = numDocs;
}
@Override
public boolean isMultiValued() {
return false;
}
@Override
public boolean isValuesOrdered() {
return false;
}
@Override
public long getNumberUniqueValues() {
return 0;
}
@Override
public long getMemorySizeInBytes() {
return 0;
}
@Override
public BytesValues getBytesValues(boolean needsHashes) {
return BytesValues.EMPTY;
}
@Override
public GeoPointValues getGeoPointValues() {
return GeoPointValues.EMPTY;
}
@Override
public ScriptDocValues getScriptValues() {
return ScriptDocValues.EMPTY;
}
@Override
public int getNumDocs() {
return numDocs;
}
@Override
public void close() {
// no-op
}
}
protected static class GeoPointEnum {
private final BytesRefIterator termsEnum;
private final GeoPoint next;
private final CharsRef spare;
protected GeoPointEnum(BytesRefIterator termsEnum) {
this.termsEnum = termsEnum;
next = new GeoPoint();
spare = new CharsRef();
}
public GeoPoint next() throws IOException {
final BytesRef term = termsEnum.next();
if (term == null) {
return null;
}
UnicodeUtil.UTF8toUTF16(term, spare);
int commaIndex = -1;
for (int i = 0; i < spare.length; i++) {
if (spare.chars[spare.offset + i] == ',') { // safes a string creation
commaIndex = i;
break;
}
}
if (commaIndex == -1) {
assert false;
return next.reset(0, 0);
}
final double lat = Double.parseDouble(new String(spare.chars, spare.offset, (commaIndex - spare.offset)));
final double lon = Double.parseDouble(new String(spare.chars, (spare.offset + (commaIndex + 1)), spare.length - ((commaIndex + 1) - spare.offset)));
return next.reset(lat, lon);
}
}
public AbstractGeoPointIndexFieldData(Index index, Settings indexSettings, Names fieldNames, FieldDataType fieldDataType, IndexFieldDataCache cache) {
super(index, indexSettings, fieldNames, fieldDataType, cache);
}
@Override
public boolean valuesOrdered() {
// because we might have single values? we can dynamically update a flag to reflect that
// based on the atomic field data loaded
return false;
}
@Override
public final XFieldComparatorSource comparatorSource(@Nullable Object missingValue, SortMode sortMode) {
throw new ElasticsearchIllegalArgumentException("can't sort on geo_point field without using specific sorting feature, like geo_distance");
}
}