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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.vespa.flags.json;
import java.util.Comparator;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* @author hakonhall
*/
public class RelationalPredicate {
private final String originalPredicateString;
private final RelationalOperator operator;
private final String rightOperand;
/** @param predicateString is e.g. "> SUFFIX" or "<=SUFFIX". The first part is {@link RelationalOperator}. */
public static RelationalPredicate fromWire(String predicateString) {
// Make sure we try to match e.g. "<=" before "<" as the prefix of predicateString.
List<RelationalOperator> operatorsByDecendingLength = Stream.of(RelationalOperator.values())
.sorted(Comparator.comparing(operator -> - operator.toText().length()))
.toList();
for (var operator : operatorsByDecendingLength) {
if (predicateString.startsWith(operator.toText())) {
String suffix = predicateString.substring(operator.toText().length()).trim();
return new RelationalPredicate(predicateString, operator, suffix);
}
}
throw new IllegalArgumentException("Predicate string '" + predicateString + "' does not start with a relation operator");
}
private RelationalPredicate(String originalPredicateString, RelationalOperator operator, String rightOperand) {
this.originalPredicateString = originalPredicateString;
this.operator = operator;
this.rightOperand = rightOperand;
}
public RelationalOperator operator() { return operator; }
public String rightOperand() { return rightOperand; }
public String toWire() { return originalPredicateString; }
}
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