/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search licenses this
* file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* 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
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.elasticsearch.index.field.data.strings;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.FieldComparator;
import org.apache.lucene.search.SortField;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.index.cache.field.data.FieldDataCache;
import org.elasticsearch.index.field.data.FieldDataType;
import java.io.IOException;
/**
* @author kimchy (shay.banon)
*/
public class StringFieldDataType implements FieldDataType<StringFieldData> {
@Override public ExtendedFieldComparatorSource newFieldComparatorSource(final FieldDataCache cache, final String missing) {
if (missing != null) {
throw new ElasticSearchIllegalArgumentException("Sorting on string type field does not support missing parameter");
}
return new ExtendedFieldComparatorSource() {
@Override public FieldComparator newComparator(String fieldname, int numHits, int sortPos, boolean reversed) throws IOException {
return new StringOrdValFieldDataComparator(numHits, fieldname, sortPos, reversed, cache);
}
@Override public int reducedType() {
return SortField.STRING;
}
};
}
@Override public StringFieldData load(IndexReader reader, String fieldName) throws IOException {
return StringFieldData.load(reader, fieldName);
}
}