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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.language.detect;
import java.nio.ByteBuffer;
/**
* Abstract superclass of all Detectors used for language and encoding detection.
*
* @author Einar M R Rosenvinge
*/
public interface Detector {
/**
* Detects language and encoding of the supplied byte array, possibly using a language/encoding hint.
*
* @param input the buffer that is to be inspected
* @param offset the offset to detect from
* @param length the size to detect from
* @param hint a hint to the detector, or null for no hint
* @return an array of possible language/encoding pairs, sorted by decreasing confidence (possibly empty, but never null)
* @throws DetectionException if detection fails
*/
Detection detect(byte[] input, int offset, int length, Hint hint);
/**
* Detects language and encoding of the supplied ByteBuffer, possibly using a language/encoding hint.
*
* @param input the buffer that is to be inspected, from its current position to its limit
* @param hint a hint to the detector, or null for no hint
* @return an array of possible language/encoding pairs, sorted by decreasing confidence (possibly empty, but never null)
* @throws DetectionException if detection fails
*/
Detection detect(ByteBuffer input, Hint hint);
/**
* Detects language of the supplied String, possibly using a language hint.
*
* @param input the string that is to be inspected
* @param hint a hint to the detector, or null for no hint
* @return an array of possible language/encoding pairs, sorted by decreasing confidence (possibly empty, but never null)
* @throws DetectionException if detection fails
*/
Detection detect(String input, Hint hint);
}
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