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;
19 import com.google.zxing.ReaderException;
22 * <p>See ISO 18004:2006, 6.4.1, Tables 2 and 3. This enum encapsulates the various modes in which
23 * data can be encoded to bits in the QR code standard.</p>
25 * @author srowen@google.com (Sean Owen)
29 // No, we can't use an enum here. J2ME doesn't support it.
31 static final Mode TERMINATOR = new Mode(new int[] {0, 0, 0}); // Not really a mode...
32 static final Mode NUMERIC = new Mode(new int[] {10, 12, 14});
33 static final Mode ALPHANUMERIC = new Mode(new int[] {9, 11, 13});
34 static final Mode BYTE = new Mode(new int[] {8, 16, 16});
35 static final Mode KANJI = new Mode(new int[] {8, 10, 12});
37 private int[] characterCountBitsForVersions;
39 private Mode(int[] characterCountBitsForVersions) {
40 this.characterCountBitsForVersions = characterCountBitsForVersions;
43 static Mode forBits(int bits) throws ReaderException {
56 throw new ReaderException("Illegal mode bits: " + bits);
60 int getCharacterCountBits(Version version) {
61 int number = version.getVersionNumber();
65 } else if (number <= 26) {
70 return characterCountBitsForVersions[offset];