package org.apache.solr.search.function.distance;
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.
*/
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.spell.StringDistance;
import org.apache.solr.search.function.DocValues;
import org.apache.solr.search.function.ValueSource;
import java.io.IOException;
import java.util.Map;
/**
*
*
**/
public class StringDistanceFunction extends ValueSource {
protected ValueSource str1, str2;
protected StringDistance dist;
/**
* @param str1
* @param str2
* @param measure
*/
public StringDistanceFunction(ValueSource str1, ValueSource str2, StringDistance measure) {
this.str1 = str1;
this.str2 = str2;
dist = measure;
}
@Override
public DocValues getValues(Map context, IndexReader reader) throws IOException {
final DocValues str1DV = str1.getValues(context, reader);
final DocValues str2DV = str2.getValues(context, reader);
return new DocValues() {
@Override
public float floatVal(int doc) {
return dist.getDistance(str1DV.strVal(doc), str2DV.strVal(doc));
}
@Override
public int intVal(int doc) {
return (int) doubleVal(doc);
}
@Override
public long longVal(int doc) {
return (long) doubleVal(doc);
}
@Override
public double doubleVal(int doc) {
return (double) floatVal(doc);
}
@Override
public String toString(int doc) {
StringBuilder sb = new StringBuilder();
sb.append("strdist").append('(');
sb.append(str1DV.toString(doc)).append(',').append(str2DV.toString(doc))
.append(", dist=").append(dist.getClass().getName());
sb.append(')');
return sb.toString();
}
};
}
@Override
public String description() {
StringBuilder sb = new StringBuilder();
sb.append("strdist").append('(');
sb.append(str1).append(',').append(str2).append(", dist=").append(dist.getClass().getName());
sb.append(')');
return sb.toString();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof StringDistanceFunction)) return false;
StringDistanceFunction that = (StringDistanceFunction) o;
if (!dist.equals(that.dist)) return false;
if (!str1.equals(that.str1)) return false;
if (!str2.equals(that.str2)) return false;
return true;
}
@Override
public int hashCode() {
int result = str1.hashCode();
result = 31 * result + str2.hashCode();
result = 31 * result + dist.hashCode();
return result;
}
}