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java.lang.Objectuk.ac.starlink.fits.BufferedRandomInput
public class BufferedRandomInput
BasicInput implementation based on a RandomAccessFile. Buffering of the underlying file is performed on the assumption that access will be largely sequential.
Field Summary | |
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static int |
DFLT_BUFSIZE
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Constructor Summary | |
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BufferedRandomInput(java.io.RandomAccessFile file,
long offset0)
Constructs a BufferedRandomInput with a default sized buffer. |
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BufferedRandomInput(java.io.RandomAccessFile file,
long offset0,
int bufsize)
Constructs a BufferedRandomInput with a buffer of specified size. |
Method Summary | |
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void |
close()
Releases resources belonging to this object. |
long |
getOffset()
Returns the curent position in this stream (optional operation). |
boolean |
isRandom()
Indicates whether this object supports random access. |
byte |
readByte()
Reads a byte from the stream. |
double |
readDouble()
Reads an 8-byte floating point value from the stream. |
float |
readFloat()
Reads a 4-byte floating point value from the stream. |
int |
readInt()
Reads a 4-byte integer from the stream. |
long |
readLong()
Reads an 8-byte integer from the stream. |
short |
readShort()
Reads a 2-byte integer from the stream. |
void |
seek(long offset)
Moves the current position of this stream to a given byte offset (optional operation). |
void |
skip(long nbytes)
Skips a given number of bytes forwards through the stream. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int DFLT_BUFSIZE
Constructor Detail |
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public BufferedRandomInput(java.io.RandomAccessFile file, long offset0) throws java.io.IOException
file
- fileoffset0
- offset into file of stream start
java.io.IOException
public BufferedRandomInput(java.io.RandomAccessFile file, long offset0, int bufsize) throws java.io.IOException
file
- fileoffset0
- offset into file of stream startbufsize
- buffer size
java.io.IOException
Method Detail |
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public byte readByte() throws java.io.IOException
BasicInput
readByte
in interface BasicInput
java.io.IOException
public short readShort() throws java.io.IOException
BasicInput
readShort
in interface BasicInput
java.io.IOException
public int readInt() throws java.io.IOException
BasicInput
readInt
in interface BasicInput
java.io.IOException
public long readLong() throws java.io.IOException
BasicInput
readLong
in interface BasicInput
java.io.IOException
public float readFloat() throws java.io.IOException
BasicInput
readFloat
in interface BasicInput
java.io.IOException
public double readDouble() throws java.io.IOException
BasicInput
readDouble
in interface BasicInput
java.io.IOException
public boolean isRandom()
BasicInput
isRandom
in interface BasicInput
public void skip(long nbytes) throws java.io.IOException
BasicInput
skip
in interface BasicInput
nbytes
- number of bytes to skip
java.io.IOException
public long getOffset()
BasicInput
getOffset
in interface BasicInput
public void seek(long offset) throws java.io.IOException
BasicInput
seek
in interface BasicInput
java.io.IOException
public void close() throws java.io.IOException
BasicInput
close
in interface BasicInput
java.io.IOException
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