| /* |
| * Copyright (C) 2010 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. |
| */ |
| |
| /* |
| * These authors would like to acknowledge the Spanish Ministry of Industry, |
| * Tourism and Trade, for the support in the project TSI020301-2008-2 |
| * "PIRAmIDE: Personalizable Interactions with Resources on AmI-enabled |
| * Mobile Dynamic Environments", led by Treelogic |
| * ( http://www.treelogic.com/ ): |
| * |
| * http://www.piramidepse.com/ |
| */ |
| |
| package com.google.zxing.oned.rss.expanded.decoders; |
| |
| import com.google.zxing.common.BitArray; |
| |
| /** |
| * @author Pablo Orduña, University of Deusto (pablo.orduna@deusto.es) |
| * @author Eduardo Castillejo, University of Deusto (eduardo.castillejo@deusto.es) |
| */ |
| abstract class AI01decoder extends AbstractExpandedDecoder { |
| |
| protected static final int gtinSize = 40; |
| |
| AI01decoder(BitArray information) { |
| super(information); |
| } |
| |
| protected void encodeCompressedGtin(StringBuffer buf, int currentPos) { |
| buf.append("(01)"); |
| int initialPosition = buf.length(); |
| buf.append('9'); |
| |
| encodeCompressedGtinWithoutAI(buf, currentPos, initialPosition); |
| } |
| |
| protected void encodeCompressedGtinWithoutAI(StringBuffer buf, int currentPos, int initialBufferPosition) { |
| for(int i = 0; i < 4; ++i){ |
| int currentBlock = this.generalDecoder.extractNumericValueFromBitArray(currentPos + 10 * i, 10); |
| if (currentBlock / 100 == 0) { |
| buf.append('0'); |
| } |
| if (currentBlock / 10 == 0) { |
| buf.append('0'); |
| } |
| buf.append(currentBlock); |
| } |
| |
| appendCheckDigit(buf, initialBufferPosition); |
| } |
| |
| private static void appendCheckDigit(StringBuffer buf, int currentPos){ |
| int checkDigit = 0; |
| for (int i = 0; i < 13; i++) { |
| int digit = buf.charAt(i + currentPos) - '0'; |
| checkDigit += (((i & 0x01) == 0) ? 3 * digit : digit); |
| } |
| |
| checkDigit = 10 - (checkDigit % 10); |
| if (checkDigit == 10) { |
| checkDigit = 0; |
| } |
| |
| buf.append(checkDigit); |
| } |
| |
| } |