Class LazyFileInputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable

    public class LazyFileInputStream
    extends AutoCloseInputStream
    This input stream delays opening the file until the first byte is read, and closes and discards the underlying stream as soon as the end of input has been reached or when the stream is explicitly closed.
    • Constructor Summary

      Constructors 
      Constructor Description
      LazyFileInputStream​(java.io.File file)
      Creates a new LazyFileInputStream for the given file.
      LazyFileInputStream​(java.io.FileDescriptor fd)
      Creates a new LazyFileInputStream for the given file descriptor.
      LazyFileInputStream​(java.lang.String name)
      Creates a new LazyFileInputStream for the given file.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int available()  
      void close()  
      void mark​(int readlimit)  
      boolean markSupported()  
      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

        equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • LazyFileInputStream

        public LazyFileInputStream​(java.io.File file)
                            throws java.io.FileNotFoundException
        Creates a new LazyFileInputStream for the given file. If the file is unreadable, a FileNotFoundException is thrown. The file is not opened until the first byte is read from the stream.
        Parameters:
        file - the file
        Throws:
        java.io.FileNotFoundException
      • LazyFileInputStream

        public LazyFileInputStream​(java.io.FileDescriptor fd)
        Creates a new LazyFileInputStream for the given file descriptor. The file is not opened until the first byte is read from the stream.
        Parameters:
        fd -
      • LazyFileInputStream

        public LazyFileInputStream​(java.lang.String name)
                            throws java.io.FileNotFoundException
        Creates a new LazyFileInputStream for the given file. If the file is unreadable, a FileNotFoundException is thrown.
        Parameters:
        name -
        Throws:
        java.io.FileNotFoundException
    • Method Detail

      • read

        public int read()
                 throws java.io.IOException
        Overrides:
        read in class ProxyInputStream
        Throws:
        java.io.IOException
      • available

        public int available()
                      throws java.io.IOException
        Overrides:
        available in class ProxyInputStream
        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 AutoCloseInputStream
        Throws:
        java.io.IOException
      • reset

        public void reset()
                   throws java.io.IOException
        Overrides:
        reset in class ProxyInputStream
        Throws:
        java.io.IOException
      • skip

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

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

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