org.apache.poi.poifs.filesystem
Class DocumentInputStream

java.lang.Object
  extended by java.io.InputStream
      extended by org.apache.poi.poifs.filesystem.DocumentInputStream
All Implemented Interfaces:
java.io.Closeable, LittleEndianInput

public final class DocumentInputStream
extends java.io.InputStream
implements LittleEndianInput

This class provides methods to read a DocumentEntry managed by a POIFSFileSystem instance.

Author:
Marc Johnson (mjohnson at apache dot org)

Constructor Summary
DocumentInputStream(DocumentEntry document)
          Create an InputStream from the specified DocumentEntry
DocumentInputStream(POIFSDocument document)
          Create an InputStream from the specified Document
 
Method Summary
 int available()
           
 void close()
           
 void mark(int ignoredReadlimit)
           
 boolean markSupported()
          Tests if this input stream supports the mark and reset methods.
 int read()
           
 int read(byte[] b)
           
 int read(byte[] b, int off, int len)
           
 byte readByte()
           
 double readDouble()
           
 void readFully(byte[] buf)
           
 void readFully(byte[] buf, int off, int len)
           
 int readInt()
           
 long readLong()
           
 short readShort()
           
 int readUByte()
           
 int readUShort()
           
 void reset()
          Repositions this stream to the position at the time the mark() method was last called on this input stream.
 long skip(long n)
           
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

DocumentInputStream

public DocumentInputStream(DocumentEntry document)
                    throws java.io.IOException
Create an InputStream from the specified DocumentEntry

Parameters:
document - the DocumentEntry to be read
Throws:
java.io.IOException - if the DocumentEntry cannot be opened (like, maybe it has been deleted?)

DocumentInputStream

public DocumentInputStream(POIFSDocument document)
Create an InputStream from the specified Document

Parameters:
document - the Document to be read
Method Detail

available

public int available()
Specified by:
available in interface LittleEndianInput
Overrides:
available in class java.io.InputStream

close

public void close()
Specified by:
close in interface java.io.Closeable
Overrides:
close in class java.io.InputStream

mark

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

markSupported

public boolean markSupported()
Tests if this input stream supports the mark and reset methods.

Overrides:
markSupported in class java.io.InputStream
Returns:
true always

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

reset

public void reset()
Repositions this stream to the position at the time the mark() method was last called on this input stream. If mark() has not been called this method repositions the stream to its beginning.

Overrides:
reset in class java.io.InputStream

skip

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

readByte

public byte readByte()
Specified by:
readByte in interface LittleEndianInput

readDouble

public double readDouble()
Specified by:
readDouble in interface LittleEndianInput

readFully

public void readFully(byte[] buf)
Specified by:
readFully in interface LittleEndianInput

readShort

public short readShort()
Specified by:
readShort in interface LittleEndianInput

readFully

public void readFully(byte[] buf,
                      int off,
                      int len)
Specified by:
readFully in interface LittleEndianInput

readLong

public long readLong()
Specified by:
readLong in interface LittleEndianInput

readInt

public int readInt()
Specified by:
readInt in interface LittleEndianInput

readUShort

public int readUShort()
Specified by:
readUShort in interface LittleEndianInput

readUByte

public int readUByte()
Specified by:
readUByte in interface LittleEndianInput