com.pmstation.spss.reader
Class SPSSInputStream

java.lang.Object
  java.io.InputStream
      com.pmstation.spss.reader.SPSSInputStream

All Implemented Interfaces:

java.io.Closeable

public class SPSSInputStream
extends java.io.InputStream

A bit extended stream to read bytes, strings, doubles and ints from SPSS save file

Constructor Summary

SPSSInputStream(java.io.InputStream in, java.lang.String charset)
Instantiates a new SPSS input stream.

Method Summary

int	available() returns available from underlying stream
void	close() closes underlying stream
void	mark(int readlimit) mark underlying stream
boolean	markSupported()
int	read() read byte from underlying stream
int	read(byte[] b) read b.length bytes from underlying stream
int	read(byte[] b, int off, int len) read len bytes from underlying stream storing them at off offset into b array
double	readDouble() Read double from stream.
float	readFloat() Read float.
int	readInt() Read int from underlying stream.
long	readLong() Read long from stream.
java.lang.String	readString() Read string.
java.lang.String	readString(int length) Read string of specified length.
void	reset() resets underlying stream
long	skip(long n) skips n bytes in underlying stream

Methods inherited from class java.lang.Object

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

Constructor Detail

SPSSInputStream

public SPSSInputStream(java.io.InputStream in,
                       java.lang.String charset)

Instantiates a new SPSS input stream.

Parameters:

in - underlying stream

charset - charset

Method Detail

read

public int read()
         throws java.io.IOException

read byte from underlying stream

Specified by:

read in class java.io.InputStream

Throws:

java.io.IOException

available

public int available()
              throws java.io.IOException

returns available from underlying stream

Overrides:

available in class java.io.InputStream

Throws:

java.io.IOException

close

public void close()
           throws java.io.IOException

closes underlying stream

Specified by:

close in interface java.io.Closeable

Overrides:

close in class java.io.InputStream

Throws:

java.io.IOException

mark

public void mark(int readlimit)

mark underlying stream

Overrides:

mark in class java.io.InputStream

markSupported

public boolean markSupported()

Overrides:

markSupported in class java.io.InputStream

Returns:

if mark supported by underlying stream

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

read len bytes from underlying stream storing them at off offset into b array

Overrides:

read in class java.io.InputStream

Returns:

actually bytes read

Throws:

java.io.IOException

read

public int read(byte[] b)
         throws java.io.IOException

read b.length bytes from underlying stream

Overrides:

read in class java.io.InputStream

Returns:

actually bytes read

Throws:

java.io.IOException

reset

public void reset()
           throws java.io.IOException

resets underlying stream

Overrides:

reset in class java.io.InputStream

Throws:

java.io.IOException

skip

public long skip(long n)
          throws java.io.IOException

skips n bytes in underlying stream

Overrides:

skip in class java.io.InputStream

Throws:

java.io.IOException

readInt

public int readInt()
            throws java.io.IOException

Read int from underlying stream. It is assumed low-to-high bytes order

Returns:

the int

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

readString

public java.lang.String readString(int length)
                            throws java.io.IOException

Read string of specified length.

Parameters:

length - the length

Returns:

the string

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

readString

public java.lang.String readString()
                            throws java.io.IOException

Read string. It is assumed that length of the string written in first 4 bytes as integer.

Returns:

the string

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

readDouble

public double readDouble()
                  throws java.io.IOException

Read double from stream. It is assumed that double stored as longBits with low bytes coming first

Returns:

the double

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

readLong

public long readLong()
              throws java.io.IOException

Read long from stream. It is assumed that low bytes coming first

Returns:

the long

Throws:

java.io.IOException - Signals that an I/O exception has occurred.

readFloat

public float readFloat()
                throws java.io.IOException

Read float. It is assumed that float stored as intBits with low bytes coming first

Returns:

the float

Throws:

java.io.IOException - Signals that an I/O exception has occurred.