content: /*
   * 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.ailiwean.core.zxing.core.oned.rss.expanded;
  
  
  import com.ailiwean.core.zxing.core.common.BitArray;
  
  import java.util.List;
  
  /**
   * @author Pablo Orduña, University of Deusto (pablo.orduna@deusto.es)
   * @author Eduardo Castillejo, University of Deusto (eduardo.castillejo@deusto.es)
   */
  final class BitArrayBuilder {
  
    private BitArrayBuilder() {
    }
  
    static BitArray buildBitArray(List<ExpandedPair> pairs) {
      int charNumber = (pairs.size() * 2) - 1;
      if (pairs.get(pairs.size() - 1).getRightChar() == null) {
        charNumber -= 1;
      }
  
      int size = 12 * charNumber;
  
      BitArray binary = new BitArray(size);
      int accPos = 0;
  
      ExpandedPair firstPair = pairs.get(0);
      int firstValue = firstPair.getRightChar().getValue();
      for (int i = 11; i >= 0; --i) {
        if ((firstValue & (1 << i)) != 0) {
          binary.set(accPos);
        }
        accPos++;
      }
  
      for (int i = 1; i < pairs.size(); ++i) {
        ExpandedPair currentPair = pairs.get(i);
  
        int leftValue = currentPair.getLeftChar().getValue();
        for (int j = 11; j >= 0; --j) {
          if ((leftValue & (1 << j)) != 0) {
            binary.set(accPos);
          }
          accPos++;
        }
  
        if (currentPair.getRightChar() != null) {
          int rightValue = currentPair.getRightChar().getValue();
          for (int j = 11; j >= 0; --j) {
            if ((rightValue & (1 << j)) != 0) {
              binary.set(accPos);
            }
            accPos++;
          }
        }
      }
      return binary;
    }
  }
  