Module org.apache.xmlgraphics.commons
Package org.apache.xmlgraphics.image.loader.impl

Class AbstractImagePreloader

java.lang.Object
org.apache.xmlgraphics.image.loader.impl.AbstractImagePreloader
All Implemented Interfaces:
ImagePreloader
Direct Known Subclasses:
PreloaderBMP, PreloaderEMF, PreloaderEPS, PreloaderGIF, PreloaderImageIO, PreloaderJPEG, PreloaderRawPNG, PreloaderTIFF
public abstract class AbstractImagePreloader extends Object implements ImagePreloader
Abstract base class for image preloaders. It provides helper methods for often-used tasks.

  • Constructor Details

    • AbstractImagePreloader

      public AbstractImagePreloader()

  • Method Details

    • getHeader

      protected byte[] getHeader(ImageInputStream in, int size) throws IOException
      Allows to read an image header (usually just a magic number). The InputStream is reset to the position before the header was read.
      Parameters:
      in - the ImageInputStream to read from
      size - the size of the header
      Returns:
      the loaded header
      Throws:
      IOException - if an I/O error occurs while reading the header

    • getPriority

      public int getPriority()
      Returns the priority of the preloader. The lower the value, the higher the preloader's priority.
      Specified by:
      getPriority in interface ImagePreloader
      Returns:
      an integer (default is 1000)