Package nl.knaw.dans.layerstore

Interface LayerManager

All Known Implementing Classes:
LayerManagerImpl
public interface LayerManager
Manages Layers. Implementations of this interface should create new layers only through the `newTopLayer` method.

  • Method Summary

    Modifier and Type
    Method
    Description
    Layer
    getLayer(long id)
    Returns the layer with the given id.
    Layer
    getTopLayer()
    Returns the current top layer.
    List<Long>
    listLayerIds()
    Lists all layer IDs that are currently managed.
    Layer
    newTopLayer()
    Closes the current top layer (if present) and creates a new top layer.

  • Method Details

    • newTopLayer

      Layer newTopLayer() throws IOException
      Closes the current top layer (if present) and creates a new top layer. The old top layer will be scheduled for archiving.
      Throws:
      IOException

    • getTopLayer

      Layer getTopLayer()
      Returns the current top layer.
      Returns:
      the current top layer

    • getLayer

      Layer getLayer(long id)
      Returns the layer with the given id.
      Parameters:
      id - the id of the layer
      Returns:
      the layer

    • listLayerIds

      List<Long> listLayerIds() throws IOException
      Lists all layer IDs that are currently managed.
      Returns:
      a list of layer IDs
      Throws:
      IOException - if an I/O error occurs