private boolean loadShapefileIndexes()

in baremaps-core/src/main/java/org/apache/baremaps/storage/shapefile/internal/ShapefileByteReader.java [166:201]

30 lines of code
6 McCabe index (conditional complexity)


  private boolean loadShapefileIndexes() {
    if (this.shapeFileIndex == null) {
      return false;
    }

    try (FileInputStream fis = new FileInputStream(this.shapeFileIndex);
        FileChannel fc = fis.getChannel()) {
      try {
        int fsize = (int) fc.size();
        MappedByteBuffer indexesByteBuffer = fc.map(FileChannel.MapMode.READ_ONLY, 0, fsize);

        // Indexes entries follow.
        this.indexes = new ArrayList<>();
        this.recordsLengths = new ArrayList<>();
        indexesByteBuffer.position(100);
        indexesByteBuffer.order(ByteOrder.BIG_ENDIAN);

        while (indexesByteBuffer.hasRemaining()) {
          this.indexes.add(indexesByteBuffer.getInt()); // Data offset : the position of the record
                                                        // in the main shapefile,
          // expressed in words (16 bits).
          this.recordsLengths.add(indexesByteBuffer.getInt()); // Length of this shapefile record.
        }
        return true;
      } catch (IOException e) {
        this.shapeFileIndex = null;
        return false;
      }
    } catch (FileNotFoundException e) {
      this.shapeFileIndex = null;
      return false;
    } catch (IOException e) {
      this.shapeFileIndex = null;
      return false;
    }
  }