package org.apache.solr.search.function.distance;
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() {
public float floatVal(int doc) {
return (float) dist.getDistance(str1DV.strVal(doc), str2DV.strVal(doc));
}
public int intVal(int doc) {
return (int) doubleVal(doc);
}
public long longVal(int doc) {
return (long) doubleVal(doc);
}
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();
}
};
}
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;
}
}