2 * Copyright 2007 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.qrcode.decoder;
20 * <p>See ISO 18004:2006, 6.5.1. This enum encapsulates the four error correction levels
21 * defined by the QR code standard.</p>
25 public final class ErrorCorrectionLevel {
27 // No, we can't use an enum here. J2ME doesn't support it.
32 public static final ErrorCorrectionLevel L = new ErrorCorrectionLevel(0, 0x01, "L");
36 public static final ErrorCorrectionLevel M = new ErrorCorrectionLevel(1, 0x00, "M");
40 public static final ErrorCorrectionLevel Q = new ErrorCorrectionLevel(2, 0x03, "Q");
44 public static final ErrorCorrectionLevel H = new ErrorCorrectionLevel(3, 0x02, "H");
46 private static final ErrorCorrectionLevel[] FOR_BITS = {M, L, H, Q};
48 private final int ordinal;
49 private final int bits;
50 private final String name;
52 private ErrorCorrectionLevel(int ordinal, int bits, String name) {
53 this.ordinal = ordinal;
58 public int ordinal() {
62 public int getBits() {
66 public String getName() {
70 public String toString() {
75 * @param bits int containing the two bits encoding a QR Code's error correction level
76 * @return {@link ErrorCorrectionLevel} representing the encoded error correction level
78 public static ErrorCorrectionLevel forBits(int bits) {
79 if (bits < 0 || bits >= FOR_BITS.length) {
80 throw new IllegalArgumentException();
82 return FOR_BITS[bits];