Package org.jboss.vfs.util

Class LazyInputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable
    public class LazyInputStream
extends java.io.InputStream
    Lazy input stream.

    Delaying opening stream from underlying virtual file as long as possible. Won't be opened if not used at all.

    Synchronization is very simplistic, as it's highly unlikely there will be a lot of concurrent requests.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      private VirtualFile file  
      private java.io.InputStream stream  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int available()  
      void close()  
      void mark​(int readlimit)  
      boolean markSupported()  
      protected java.io.InputStream openStream()
      Open stream.
      int read()  
      int read​(byte[] b)  
      int read​(byte[] b, int off, int len)  
      void reset()  
      long skip​(long n)  

      • Methods inherited from class java.io.InputStream

        nullInputStream, readAllBytes, readNBytes, readNBytes, transferTo

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • stream

        private java.io.InputStream stream

    • Constructor Detail

      • LazyInputStream

        public LazyInputStream​(VirtualFile file)

    • Method Detail

      • openStream

        protected java.io.InputStream openStream()
                                  throws java.io.IOException
        Open stream.
        Returns:
        file's stream
        Throws:
        java.io.IOException - for any IO error

      • read

        public int read()
         throws java.io.IOException
        Specified by:
        read in class java.io.InputStream
        Throws:
        java.io.IOException

      • read

        public int read​(byte[] b)
         throws java.io.IOException
        Overrides:
        read in class java.io.InputStream
        Throws:
        java.io.IOException

      • read

        public int read​(byte[] b,
                int off,
                int len)
         throws java.io.IOException
        Overrides:
        read in class java.io.InputStream
        Throws:
        java.io.IOException

      • skip

        public long skip​(long n)
          throws java.io.IOException
        Overrides:
        skip in class java.io.InputStream
        Throws:
        java.io.IOException

      • available

        public int available()
              throws java.io.IOException
        Overrides:
        available in class java.io.InputStream
        Throws:
        java.io.IOException

      • close

        public void close()
           throws java.io.IOException
        Specified by:
        close in interface java.lang.AutoCloseable
        Specified by:
        close in interface java.io.Closeable
        Overrides:
        close in class java.io.InputStream
        Throws:
        java.io.IOException

      • mark

        public void mark​(int readlimit)
        Overrides:
        mark in class java.io.InputStream

      • reset

        public void reset()
           throws java.io.IOException
        Overrides:
        reset in class java.io.InputStream
        Throws:
        java.io.IOException

      • markSupported

        public boolean markSupported()
        Overrides:
        markSupported in class java.io.InputStream