org.terrier.utility.io
Class RandomDataInputMemory

java.lang.Object
  java.io.InputStream
      java.io.FilterInputStream
          java.io.DataInputStream
              org.terrier.utility.io.RandomDataInputMemory

All Implemented Interfaces:

Closeable, DataInput, Cloneable, RandomDataInput

public class RandomDataInputMemory
extends DataInputStream
implements RandomDataInput, Cloneable

Implements a RandomDataInput backed by a byte[] rather than a file.

Since:

3.0

Author:

Craig Macdonald

Field Summary

protected org.terrier.utility.io.RandomDataInputMemory.Seekable

buf input stream to use

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

	RandomDataInputMemory(byte[] b) Construct a new RandomDataInputMemory object, backed by the specified buffer
	RandomDataInputMemory(DataInputStream in, long length) Construct a new RandomDataInputMemory object, backed by the specified buffer
protected	RandomDataInputMemory(InputStream seekable)
	RandomDataInputMemory(String filename) Construct a new RandomDataInputMemory object, backed by the specified file

Method Summary

Object	clone()
void	close()
long	getFilePointer() Return the current position in the file
long	length() Returns the length of the file
void	seek(long _pos) Seek to specified position in the file

Methods inherited from class java.io.DataInputStream

read, read, readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, readUTF, skipBytes

Methods inherited from class java.io.FilterInputStream

available, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataInput

readBoolean, readByte, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedShort, readUTF, skipBytes

Field Detail

buf

protected org.terrier.utility.io.RandomDataInputMemory.Seekable buf

input stream to use

Constructor Detail

RandomDataInputMemory

protected RandomDataInputMemory(InputStream seekable)
                         throws IOException

Throws:

IOException

RandomDataInputMemory

public RandomDataInputMemory(String filename)
                      throws IOException

Construct a new RandomDataInputMemory object, backed by the specified file

Throws:

IOException

RandomDataInputMemory

public RandomDataInputMemory(DataInputStream in,
                             long length)
                      throws IOException

Construct a new RandomDataInputMemory object, backed by the specified buffer

Throws:

IOException

RandomDataInputMemory

public RandomDataInputMemory(byte[] b)

Construct a new RandomDataInputMemory object, backed by the specified buffer

Method Detail

getFilePointer

public long getFilePointer()
                    throws IOException

Return the current position in the file

Specified by:

getFilePointer in interface RandomDataInput

Throws:

IOException

length

public long length()
            throws IOException

Returns the length of the file

Specified by:

length in interface RandomDataInput

Throws:

IOException

seek

public void seek(long _pos)
          throws IOException

Seek to specified position in the file

Specified by:

seek in interface RandomDataInput

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Overrides:

close in class FilterInputStream

Throws:

IOException

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class Object

Throws:

CloneNotSupportedException