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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchlib.ranking.features.fieldmatch;
import java.util.Arrays;
import java.util.List;
/**
* Represents a document field which can be matched and ranked against.
*
* @author bratseth
*/
public class Field {
private final List<Term> terms;
/** Creates a field from a space-separated string */
public Field(String fieldString) {
terms = Arrays.stream(fieldString.split(" ")).map(Term::new).toList();
}
/** Creates a field from a list of terms */
public Field(List<Term> terms) {
this.terms = List.copyOf(terms);
}
/** Returns an immutable list of the terms in this */
public List<Term> terms() { return terms; }
/** A term in a field */
public static class Term {
private final String value;
private final float exactness;
/** Creates a term with the given value and full exactness (1.0) */
public Term(String value) {
this(value, 1.0f);
}
public Term(String value, float exactness) {
this.value = value;
this.exactness = exactness;
}
/** Returns the string value of this term */
public String value() { return value; }
/**
* Returns the degree to which this term is exactly what was in the document (1.0),
* or some stemmed form (closer to 0)
*/
public float exactness() { return exactness; }
}
}
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