/*
 * Copyright 2007 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.akvo.caddisfly.sensor.striptest.qrdetector;

/**
 * <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels
 * defined by the QR code standard.</p>
 *
 * @author Sean Owen
 */
public enum ErrorCorrectionLevel {

    /**
     * L = ~7% correction
     */
    L(0x01),
    /**
     * M = ~15% correction
     */
    M(0x00),
    /**
     * Q = ~25% correction
     */
    Q(0x03),
    /**
     * H = ~30% correction
     */
    H(0x02);

    private static final ErrorCorrectionLevel[] FOR_BITS = {M, L, H, Q};

    private final int bits;

    ErrorCorrectionLevel(int bits) {
        this.bits = bits;
    }

    /**
     * @param bits int containing the two bits encoding a QR Code's error correction level
     * @return ErrorCorrectionLevel representing the encoded error correction level
     */
    public static ErrorCorrectionLevel forBits(int bits) {
        if (bits < 0 || bits >= FOR_BITS.length) {
            throw new IllegalArgumentException();
        }
        return FOR_BITS[bits];
    }

    public int getBits() {
        return bits;
    }


}
