Package com.drew.lang

Class StreamReader

java.lang.Object

com.drew.lang.SequentialReader

com.drew.lang.StreamReader

public class StreamReader
extends SequentialReader

Constructor Summary

Constructors

Constructor	Description
StreamReader(java.io.InputStream stream)

Method Summary

Modifier and Type	Method	Description
int	available()	Returns an estimate of the number of bytes that can be read (or skipped over) from this SequentialReader without blocking by the next invocation of a method for this input stream.
byte	getByte()	Gets the next byte in the sequence.
void	getBytes(byte[] buffer, int offset, int count)	Retrieves bytes, writing them into a caller-provided buffer.
byte[]	getBytes(int count)	Returns the required number of bytes from the sequence.
long	getPosition()
void	skip(long n)	Skips forward in the sequence.
boolean	trySkip(long n)	Skips forward in the sequence, returning a boolean indicating whether the skip succeeded, or whether the sequence ended.

Methods inherited from class com.drew.lang.SequentialReader

getDouble64, getFloat32, getInt16, getInt32, getInt64, getInt8, getNullTerminatedBytes, getNullTerminatedString, getNullTerminatedStringValue, getS15Fixed16, getString, getString, getString, getStringValue, getUInt16, getUInt32, getUInt8, isMotorolaByteOrder, setMotorolaByteOrder

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamReader

public StreamReader(java.io.InputStream stream)

Method Detail

getPosition

public long getPosition()

Specified by:

getPosition in class SequentialReader

getByte

public byte getByte()
             throws java.io.IOException

Description copied from class: SequentialReader

Gets the next byte in the sequence.

Specified by:

getByte in class SequentialReader

Returns:

The read byte value

Throws:

java.io.IOException

getBytes

public byte[] getBytes(int count)
                throws java.io.IOException

Description copied from class: SequentialReader

Returns the required number of bytes from the sequence.

Specified by:

getBytes in class SequentialReader

Parameters:

count - The number of bytes to be returned

Returns:

The requested bytes

Throws:

java.io.IOException

getBytes

public void getBytes(byte[] buffer,
                     int offset,
                     int count)
              throws java.io.IOException

Description copied from class: SequentialReader

Retrieves bytes, writing them into a caller-provided buffer.

Specified by:

getBytes in class SequentialReader

Parameters:

buffer - The array to write bytes to.

offset - The starting position within buffer to write to.

count - The number of bytes to be written.

Throws:

java.io.IOException

skip

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

Description copied from class: SequentialReader

Skips forward in the sequence. If the sequence ends, an EOFException is thrown.

Specified by:

skip in class SequentialReader

Parameters:

n - the number of byte to skip. Must be zero or greater.

Throws:

java.io.EOFException - the end of the sequence is reached.

java.io.IOException - an error occurred reading from the underlying source.

trySkip

public boolean trySkip(long n)
                throws java.io.IOException

Description copied from class: SequentialReader

Skips forward in the sequence, returning a boolean indicating whether the skip succeeded, or whether the sequence ended.

Specified by:

trySkip in class SequentialReader

Parameters:

n - the number of byte to skip. Must be zero or greater.

Returns:

a boolean indicating whether the skip succeeded, or whether the sequence ended.

Throws:

java.io.IOException - an error occurred reading from the underlying source.

available

public int available()

Description copied from class: SequentialReader

Returns an estimate of the number of bytes that can be read (or skipped over) from this SequentialReader without blocking by the next invocation of a method for this input stream. A single read or skip of this many bytes will not block, but may read or skip fewer bytes.

Note that while some implementations of SequentialReader like SequentialByteArrayReader will return the total remaining number of bytes in the stream, others will not. It is never correct to use the return value of this method to allocate a buffer intended to hold all data in this stream.

Specified by:

available in class SequentialReader

Returns:

an estimate of the number of bytes that can be read (or skipped over) from this SequentialReader without blocking or 0 when it reaches the end of the input stream.