Package org.apache.xerces.impl

Class XMLEntityManager.RewindableInputStream

  • All Implemented Interfaces:
    java.io.Closeable, java.lang.AutoCloseable
    Enclosing class:
    XMLEntityManager
    protected final class XMLEntityManager.RewindableInputStream
extends java.io.InputStream
    This class wraps the byte inputstreams we're presented with. We need it because java.io.InputStreams don't provide functionality to reread processed bytes, and they have a habit of reading more than one character when you call their read() methods. This means that, once we discover the true (declared) encoding of a document, we can neither backtrack to read the whole doc again nor start reading where we are with a new reader. This class allows rewinding an inputStream by allowing a mark to be set, and the stream reset to that position. The class assumes that it needs to read one character per invocation when it's read() method is inovked, but uses the underlying InputStream's read(char[], offset length) method--it won't buffer data read this way!

    INTERNAL:

    Usage of this class is not supported. It may be altered or removed at any time.
    Author:
    Neil Graham, IBM, Glenn Marcy, IBM

    • Constructor Summary

      Constructors 
      Constructor Description
      RewindableInputStream​(java.io.InputStream is)  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int available()  
      void close()  
      void mark​(int howMuch)  
      boolean markSupported()  
      int read()  
      int read​(byte[] b, int off, int len)  
      int readAndBuffer()  
      void reset()  
      void rewind()  
      void setStartOffset​(int offset)  
      long skip​(long n)  

      • Methods inherited from class java.io.InputStream

        nullInputStream, read, readAllBytes, readNBytes, readNBytes, transferTo

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • RewindableInputStream

        public RewindableInputStream​(java.io.InputStream is)

    • Method Detail

      • setStartOffset

        public void setStartOffset​(int offset)

      • rewind

        public void rewind()

      • readAndBuffer

        public int readAndBuffer()
                  throws java.io.IOException
        Throws:
        java.io.IOException

      • 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,
                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

      • mark

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

      • reset

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

      • markSupported

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

      • 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