content: /**
   * Copyright 2006 DFKI GmbH.
   * All Rights Reserved.  Use is subject to license terms.
   * <p/>
   * This file is part of MARY TTS.
   * <p/>
   * MARY TTS is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation, version 3 of the License.
   * <p/>
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Lesser General Public License for more details.
   * <p/>
   * You should have received a copy of the GNU Lesser General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package marytts.util.data.text;
  
  import java.io.File;
  import java.io.FileNotFoundException;
  import java.io.FileReader;
  import java.io.IOException;
  import java.io.Reader;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.StringTokenizer;
  
  
  /**
   * @author Marc Schr&ouml;der
   */
  public class SnackTextfileDoubleDataSource extends TextReaderDoubleDataSource {
      /**
       * Read Double data from a Text file. Read one double per line.
       *
       * @param reader
       */
      public SnackTextfileDoubleDataSource(File file) throws FileNotFoundException {
          this(new FileReader(file));
      }
  
      /**
       * Initialise this double data source with the reader from which a text
       * representation of doubles (one per line) can be read.
       */
      public SnackTextfileDoubleDataSource(Reader reader) {
          super(reader);
      }
  
  
      /**
       * Try to get length doubles from this DoubleDataSource, and copy them into target, starting from targetPos.
       * This is the core method getting the data. Subclasses may want to override this method.
       * If an exception occurs reading from the underlying reader, or converting data to double,
       * the method will print a stack trace to standard error, but otherwise will
       * silently stop and behave as if all data was read.
       *
       * @param target    the double array to write into
       * @param targetPos position in target where to start writing
       * @param length    the amount of data requested
       * @return the amount of data actually delivered. If the returned value is less than length,
       * only that many data items have been copied into target; further calls will return 0 and not copy anything.
       */
      @Override
      public int getData(double[] target, int targetPos, int length) {
          int i = 0;
          try {
              String line;
              String strVal;
              StringTokenizer s;
              double value;
  
              List lines = new ArrayList();
              while ((line = reader.readLine()) != null) {
                  lines.add(line);
              }
              int numData = lines.size();
              for (i = 0; i < length; i++) {
                  if (i >= numData) return i;
                  strVal = (String) lines.get(i);
                  s = new StringTokenizer(strVal);
  
                  if (s.hasMoreTokens())
                      value = Double.parseDouble(s.nextToken());
                  else
                      value = Double.parseDouble(strVal);
  
                  target[targetPos + i] = value;
              }
          } catch (IOException ioe) {
              ioe.printStackTrace();
              return i;
          } catch (NumberFormatException nfe) {
              nfe.printStackTrace();
              return i;
          }
          return length;
      }
  }
  
  