Package org.rrd4j.core.jrrd

Class RRDFile

java.lang.Object

org.rrd4j.core.jrrd.RRDFile

All Implemented Interfaces:

Constants

class RRDFile
extends Object
implements Constants

This class is used read information from an RRD file. Writing to RRD files is not currently supported. It uses NIO's RandomAccessFile to read the file Currently this can read RRD files that were generated on Solaris (Sparc) and Linux (x86).

Version:

$Revision: 1.1 $

Author:

Ciaran Treanor

Field Summary

Fields inherited from interface org.rrd4j.core.jrrd.Constants

CF_NAM_SIZE, COOKIE, DS_NAM_SIZE, DST_SIZE, FLOAT_COOKIE, LAST_DS_LEN, MAX_SUPPORTED_VERSION, SIZE_OF_DOUBLE, UNDEFINED_VERSION, UNDEFINED_VERSION_AS_INT, VERSION_WITH_LAST_UPDATE_SEC

Constructor Summary

Constructors

Constructor	Description
RRDFile(File file)
RRDFile(String name)

Method Summary

Modifier and Type	Method	Description
(package private) int	align()
(package private) int	align(int boundary)
(package private) void	close()
(package private) int	getAlignment()
(package private) int	getBits()
(package private) long	getFilePointer()
(package private) UnivalArray	getUnivalArray(int size)
(package private) long	info()
(package private) boolean	isBigEndian()
(package private) void	read(ByteBuffer bb)
(package private) double	readDouble()
(package private) int	readInt()
(package private) int	readLong()
(package private) String	readString(int maxLength)
void	seek(long position)
void	seekToEndOfFile()
(package private) void	skipBytes(int n)

Methods inherited from class java.lang.Object

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

Constructor Detail

RRDFile

RRDFile(String name)
 throws IOException

Throws:

IOException

RRDFile

RRDFile(File file)
 throws IOException

Throws:

IOException

Method Detail

isBigEndian

boolean isBigEndian()

getAlignment

int getAlignment()

readDouble

double readDouble()
           throws IOException

Throws:

IOException

readInt

int readInt()
     throws IOException

Throws:

IOException

readLong

int readLong()
      throws IOException

Throws:

IOException

readString

String readString(int maxLength)
           throws IOException

Throws:

IOException

skipBytes

void skipBytes(int n)
        throws IOException

Throws:

IOException

align

int align(int boundary)
   throws IOException

Throws:

IOException

align

int align()
   throws IOException

Throws:

IOException

info

long info()
   throws IOException

Throws:

IOException

getFilePointer

long getFilePointer()
             throws IOException

Throws:

IOException

close

void close()
    throws IOException

Throws:

IOException

read

void read(ByteBuffer bb)
   throws IOException

Throws:

IOException

getUnivalArray

UnivalArray getUnivalArray(int size)
                    throws IOException

Throws:

IOException

getBits

int getBits()

Returns:

the long size in bits for this file

seek

public void seek(long position)

seekToEndOfFile

public void seekToEndOfFile()