2 * Copyright 2007 Google Inc.
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>
23 * @author srowen@google.com (Sean Owen)
25 final class ErrorCorrectionLevel {
27 // No, we can't use an enum here. J2ME doesn't support it.
29 /** L = ~7% correction */
30 static final ErrorCorrectionLevel L = new ErrorCorrectionLevel(0);
31 /** M = ~15% correction */
32 static final ErrorCorrectionLevel M = new ErrorCorrectionLevel(1);
33 /** Q = ~25% correction */
34 static final ErrorCorrectionLevel Q = new ErrorCorrectionLevel(2);
35 /** H = ~30% correction */
36 static final ErrorCorrectionLevel H = new ErrorCorrectionLevel(3);
38 private static final ErrorCorrectionLevel[] FOR_BITS = new ErrorCorrectionLevel[] { M, L, H, Q };
40 private final int ordinal;
42 private ErrorCorrectionLevel(final int ordinal) {
43 this.ordinal = ordinal;
50 static ErrorCorrectionLevel forBits(int bits) {
51 return FOR_BITS[bits];