Package org.apache.commons.compress.compressors.pack200

Class Pack200CompressorInputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable
    public class Pack200CompressorInputStream
extends CompressorInputStream
    An input stream that decompresses from the Pack200 format to be read as any other stream.

    The getCount and getBytesRead methods always return 0.

    Since:
    1.3

    • Constructor Summary

      Constructors 
      Constructor Description
      Pack200CompressorInputStream​(java.io.File f)
      Decompresses the given file, caching the decompressed data in memory.
      Pack200CompressorInputStream​(java.io.File f, java.util.Map<java.lang.String,​java.lang.String> props)
      Decompresses the given file, caching the decompressed data in memory and using the given properties.
      Pack200CompressorInputStream​(java.io.File f, Pack200Strategy mode)
      Decompresses the given file using the given strategy to cache the results.
      Pack200CompressorInputStream​(java.io.File f, Pack200Strategy mode, java.util.Map<java.lang.String,​java.lang.String> props)
      Decompresses the given file using the given strategy to cache the results and the given properties.
      Pack200CompressorInputStream​(java.io.InputStream in)
      Decompresses the given stream, caching the decompressed data in memory.
      Pack200CompressorInputStream​(java.io.InputStream in, java.util.Map<java.lang.String,​java.lang.String> props)
      Decompresses the given stream, caching the decompressed data in memory and using the given properties.
      Pack200CompressorInputStream​(java.io.InputStream in, Pack200Strategy mode)
      Decompresses the given stream using the given strategy to cache the results.
      Pack200CompressorInputStream​(java.io.InputStream in, Pack200Strategy mode, java.util.Map<java.lang.String,​java.lang.String> props)
      Decompresses the given stream using the given strategy to cache the results and the given properties.

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int available()  
      void close()  
      void mark​(int limit)  
      boolean markSupported()  
      static boolean matches​(byte[] signature, int length)
      Checks if the signature matches what is expected for a pack200 file (0xCAFED00D).
      int read()  
      int read​(byte[] b)  
      int read​(byte[] b, int off, int count)  
      void reset()  
      long skip​(long count)  

      • 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

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.InputStream in)
                             throws java.io.IOException
        Decompresses the given stream, caching the decompressed data in memory.

        When reading from a file the File-arg constructor may provide better performance.

        Parameters:
        in - the InputStream from which this object should be created
        Throws:
        java.io.IOException - if reading fails

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.InputStream in,
                                    Pack200Strategy mode)
                             throws java.io.IOException
        Decompresses the given stream using the given strategy to cache the results.

        When reading from a file the File-arg constructor may provide better performance.

        Parameters:
        in - the InputStream from which this object should be created
        mode - the strategy to use
        Throws:
        java.io.IOException - if reading fails

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.InputStream in,
                                    java.util.Map<java.lang.String,​java.lang.String> props)
                             throws java.io.IOException
        Decompresses the given stream, caching the decompressed data in memory and using the given properties.

        When reading from a file the File-arg constructor may provide better performance.

        Parameters:
        in - the InputStream from which this object should be created
        props - Pack200 properties to use
        Throws:
        java.io.IOException - if reading fails

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.InputStream in,
                                    Pack200Strategy mode,
                                    java.util.Map<java.lang.String,​java.lang.String> props)
                             throws java.io.IOException
        Decompresses the given stream using the given strategy to cache the results and the given properties.

        When reading from a file the File-arg constructor may provide better performance.

        Parameters:
        in - the InputStream from which this object should be created
        mode - the strategy to use
        props - Pack200 properties to use
        Throws:
        java.io.IOException - if reading fails

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.File f)
                             throws java.io.IOException
        Decompresses the given file, caching the decompressed data in memory.
        Parameters:
        f - the file to decompress
        Throws:
        java.io.IOException - if reading fails

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.File f,
                                    Pack200Strategy mode)
                             throws java.io.IOException
        Decompresses the given file using the given strategy to cache the results.
        Parameters:
        f - the file to decompress
        mode - the strategy to use
        Throws:
        java.io.IOException - if reading fails

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.File f,
                                    java.util.Map<java.lang.String,​java.lang.String> props)
                             throws java.io.IOException
        Decompresses the given file, caching the decompressed data in memory and using the given properties.
        Parameters:
        f - the file to decompress
        props - Pack200 properties to use
        Throws:
        java.io.IOException - if reading fails

      • Pack200CompressorInputStream

        public Pack200CompressorInputStream​(java.io.File f,
                                    Pack200Strategy mode,
                                    java.util.Map<java.lang.String,​java.lang.String> props)
                             throws java.io.IOException
        Decompresses the given file using the given strategy to cache the results and the given properties.
        Parameters:
        f - the file to decompress
        mode - the strategy to use
        props - Pack200 properties to use
        Throws:
        java.io.IOException - if reading fails

    • Method Detail

      • 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 count)
         throws java.io.IOException
        Overrides:
        read 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

      • markSupported

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

      • mark

        public void mark​(int limit)
        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

      • skip

        public long skip​(long count)
          throws java.io.IOException
        Overrides:
        skip 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

      • matches

        public static boolean matches​(byte[] signature,
                              int length)
        Checks if the signature matches what is expected for a pack200 file (0xCAFED00D).
        Parameters:
        signature - the bytes to check
        length - the number of bytes to check
        Returns:
        true, if this stream is a pack200 compressed stream, false otherwise