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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.text;
/**
* Utility class parsing a string into a boolean.
* In contrast to Boolean.parseBoolean in the Java API this parser is strict.
*
* @author bratseth
*/
public class BooleanParser {
/**
* Returns true if the input string is case insensitive equal to "true" and
* false if it is case insensitive equal to "false".
* In any other case an exception is thrown.
*
* @param s the string to parse
* @return true if s is "true", false if it is "false"
* @throws IllegalArgumentException if s is not null but neither "true" or "false"
* @throws NullPointerException if s is null
*/
public static boolean parseBoolean(String s) {
if (s==null)
throw new NullPointerException("Expected 'true' or 'false', got NULL");
if (s.equalsIgnoreCase("false"))
return false;
if (s.equalsIgnoreCase("true"))
return true;
throw new IllegalArgumentException("Expected 'true' or 'false', got '" + s + "'");
}
}
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