Package org.meteoinfo.data.mapdata.webmap

Class TileCache


  • public class TileCache
extends java.lang.Object
    An implementation only class for now. For internal use only.

    • Constructor Summary

      Constructors 
      Constructor Description
      TileCache​()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.awt.image.BufferedImage get​(java.net.URI uri)
      Returns a buffered image for the requested URI from the cache.
      void needMoreMemory​()
      Request that the cache free up some memory.
      void put​(java.net.URI uri, byte[] bimg, java.awt.image.BufferedImage img)
      Put a tile image into the cache.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • TileCache

        public TileCache​()

    • Method Detail

      • put

        public void put​(java.net.URI uri,
                byte[] bimg,
                java.awt.image.BufferedImage img)
        Put a tile image into the cache. This puts both a buffered image and array of bytes that make up the compressed image.
        Parameters:
        uri - URI of image that is being stored in the cache
        bimg - bytes of the compressed image, ie: the image file that was loaded over the network
        img - image to store in the cache

      • get

        public java.awt.image.BufferedImage get​(java.net.URI uri)
                                 throws java.io.IOException
        Returns a buffered image for the requested URI from the cache. This method must return null if the image is not in the cache. If the image is unavailable but it's compressed version *is* available, then the compressed version will be expanded and returned.
        Parameters:
        uri - URI of the image previously put in the cache
        Returns:
        the image matching the requested URI, or null if not available
        Throws:
        java.io.IOException

      • needMoreMemory

        public void needMoreMemory​()
        Request that the cache free up some memory. How this happens or how much memory is freed is up to the TileCache implementation. Subclasses can implement their own strategy. The default strategy is to clear out all buffered images but retain the compressed versions.