gt:     if (stamp != null) {
context: /*
   * #%L
   * OME Bio-Formats package for reading and converting biological file formats.
   * %%
   * Copyright (C) 2005 - 2015 Open Microscopy Environment:
   *   - Board of Regents of the University of Wisconsin-Madison
   *   - Glencoe Software, Inc.
   *   - University of Dundee
   * %%
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as
   * published by the Free Software Foundation, either version 2 of the 
   * License, or (at your option) any later version.
   * 
   * 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 General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public 
   * License along with this program.  If not, see
   * <http://www.gnu.org/licenses/gpl-2.0.html>.
   * #L%
   */
  
  package loci.formats.in;
  
  import java.io.IOException;
  
  import ome.xml.model.primitives.Timestamp;
  
  import loci.common.DateTools;
  import loci.common.RandomAccessInputStream;
  import loci.formats.CoreMetadata;
  import loci.formats.FormatException;
  import loci.formats.FormatReader;
  import loci.formats.FormatTools;
  import loci.formats.MetadataTools;
  import loci.formats.meta.MetadataStore;
  
  /**
   * OpenlabRawReader is the file format reader for Openlab RAW files.
   * Specifications available at
   * http://www.improvision.com/support/tech_notes/detail.php?id=344
   *
   * @author Melissa Linkert melissa at glencoesoftware.com
   */
  public class OpenlabRawReader extends FormatReader {
  
    // -- Constants --
  
    public static final String OPENLAB_RAW_MAGIC_STRING = "OLRW";
  
    private static final int HEADER_SIZE = 288;
  
    // -- Fields --
  
    /** Offset to each image's pixel data. */
    protected int[] offsets;
  
    /** Number of bytes per pixel. */
    private int bytesPerPixel;
  
    // -- Constructor --
  
    /** Constructs a new RAW reader. */
    public OpenlabRawReader() {
      super("Openlab RAW", "raw");
      suffixSufficient = false;
      domains = new String[] {FormatTools.UNKNOWN_DOMAIN};
    }
  
    // -- IFormatReader API methods --
  
    /* @see loci.formats.IFormatReader#isThisType(RandomAccessInputStream) */
    @Override
    public boolean isThisType(RandomAccessInputStream stream) throws IOException {
      final int blockLen = OPENLAB_RAW_MAGIC_STRING.length();
      if (!FormatTools.validStream(stream, blockLen, false)) return false;
      return stream.readString(blockLen).startsWith(OPENLAB_RAW_MAGIC_STRING);
    }
  
    /**
     * @see loci.formats.IFormatReader#openBytes(int, byte[], int, int, int, int)
     */
    @Override
    public byte[] openBytes(int no, byte[] buf, int x, int y, int w, int h)
      throws FormatException, IOException
    {
      FormatTools.checkPlaneParameters(this, no, buf.length, x, y, w, h);
  
      in.seek(offsets[no / getSizeC()] + HEADER_SIZE);
      readPlane(in, x, y, w, h, buf);
  
      if (FormatTools.getBytesPerPixel(getPixelType()) == 1) {
        // need to invert the pixels
        for (int i=0; i<buf.length; i++) {
          buf[i] = (byte) (255 - buf[i]);
        }
      }
      return buf;
    }
  
    /* @see loci.formats.IFormatReader#close(boolean) */
    @Override
    public void close(boolean fileOnly) throws IOException {
      super.close(fileOnly);
      if (!fileOnly) {
        offsets = null;
        bytesPerPixel = 0;
      }
    }
  
    // -- Internal FormatReader API methods --
  
    /* @see loci.formats.FormatReader#initFile(String) */
    @Override
    protected void initFile(String id) throws FormatException, IOException {
      super.initFile(id);
      in = new RandomAccessInputStream(id);
  
      // read the 12 byte file header
  
      LOGGER.info("Verifying Openlab RAW format");
  
      if (!in.readString(4).equals("OLRW")) {
        throw new FormatException("Openlab RAW magic string not found.");
      }
  
      LOGGER.info("Populating metadata");
  
      CoreMetadata m = core.get(0);
  
      int version = in.readInt();
  
      m.imageCount = in.readInt();
      offsets = new int[getImageCount()];
      offsets[0] = 12;
  
      in.skipBytes(8);
      m.sizeX = in.readInt();
      m.sizeY = in.readInt();
      in.skipBytes(1);
      m.sizeC = in.read();
      bytesPerPixel = in.read();
      in.skipBytes(1);
  
      long stampMs = in.readLong();
      if (stampMs > 0) {
        stampMs /= 1000000;
        stampMs -= (67 * 365.25 * 24 * 60 * 60);
      }
      else stampMs = System.currentTimeMillis();
  
      String stamp = DateTools.convertDate(stampMs, DateTools.UNIX);
  
      in.skipBytes(4);
      int len = in.read() & 0xff;
      String imageName = in.readString(len - 1).trim();
  
      if (getSizeC() <= 1) m.sizeC = 1;
      else m.sizeC = 3;
  
      int plane = getSizeX() * getSizeY() * bytesPerPixel;
      for (int i=1; i<getImageCount(); i++) {
        offsets[i] = offsets[i - 1] + HEADER_SIZE + plane;
      }
  
      m.sizeZ = getImageCount();
      m.sizeT = 1;
      m.rgb = getSizeC() > 1;
      m.dimensionOrder = isRGB() ? "XYCZT" : "XYZTC";
      m.interleaved = false;
      m.littleEndian = false;
      m.metadataComplete = true;
      m.indexed = false;
      m.falseColor = false;
  
      switch (bytesPerPixel) {
        case 1:
        case 3:
          m.pixelType = FormatTools.UINT8;
          break;
        case 2:
          m.pixelType = FormatTools.UINT16;
          break;
        default:
          m.pixelType = FormatTools.FLOAT;
      }
  
      addGlobalMeta("Width", getSizeX());
      addGlobalMeta("Height", getSizeY());
      addGlobalMeta("Bytes per pixel", bytesPerPixel);
      addGlobalMeta("Image name", imageName);
      addGlobalMeta("Timestamp", stamp);
      addGlobalMeta("Version", version);
  
      // The metadata store we're working with.
      MetadataStore store = makeFilterMetadata();
      MetadataTools.populatePixels(store, this);
  