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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.semantics.rule;
import com.yahoo.prelude.query.TermType;
import com.yahoo.prelude.query.WordItem;
import com.yahoo.prelude.semantics.engine.Match;
import com.yahoo.prelude.semantics.engine.RuleEvaluation;
import com.yahoo.protect.Validator;
import java.util.List;
/**
* A literal term produced by a production rule
*
* @author bratseth
*/
public class LiteralTermProduction extends TermProduction {
private String literal;
/**
* Creates a new produced literal term
*
* @param literal the label of the condition this should take it's value from
*/
public LiteralTermProduction(String literal) {
super();
setLiteral(literal);
}
/**
* Creates a new produced literal term
*
* @param literal the label of the condition this should take it's value from
* @param termType the type of term to produce
*/
public LiteralTermProduction(String literal, TermType termType) {
super(termType);
setLiteral(literal);
}
/**
* Creates a new produced literal term
*
* @param label the label of the produced term
* @param literal this term word
* @param termType the type of term to produce
*/
public LiteralTermProduction(String label, String literal, TermType termType) {
super(label, termType);
setLiteral(literal);
}
/** The literal term value, never null */
public void setLiteral(String literal) {
Validator.ensureNotNull("A produced term", literal);
this.literal=literal;
}
/** Returns the term word produced, never null */
public String getLiteral() { return literal; }
public void produce(RuleEvaluation e, int offset) {
WordItem newItem = new WordItem(literal, getLabel());
if (replacing) {
Match matched = e.getNonreferencedMatch(0);
newItem.setWeight(matched.getItem().getWeight());
insertMatch(e, matched, List.of(newItem), offset);
}
else {
newItem.setWeight(getWeight());
if (e.getTraceLevel() >= 6)
e.trace(6, "Adding '" + newItem + "'");
e.addItems(List.of(newItem), getTermType());
}
}
public String toInnerTermString() {
return getLabelString() + literal;
}
}
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