Package com.adobe.internal.io

Class CountingInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

com.adobe.internal.io.CountingInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

Direct Known Subclasses:

RangedInputStream

public class CountingInputStream
extends FilterInputStream

A FilterInputStream wrapper that counts the number of bytes read from the stream or skipped over since the creation of this wrapper.

Constructor Summary

Constructors

Constructor	Description
CountingInputStream(InputStream is)

Method Summary

Modifier and Type	Method	Description
long	getOffset()	Get the offset in the wrapped stream since the creation of this wrapper.
int	read()	Reads the next byte of data from this input stream.
int	read(byte[] b)	Reads up to byte.length bytes of data from this input stream into an array of bytes.
int	read(byte[] b, int off, int len)	Reads up to len bytes of data from this input stream into an array of bytes.
long	skip(long n)	Skips over and discards n bytes of data from the input stream.

Methods inherited from class java.io.FilterInputStream

available, close, mark, markSupported, reset

Methods inherited from class java.io.InputStream

nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo

Methods inherited from class java.lang.Object

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

Constructor Details

CountingInputStream

public CountingInputStream(InputStream is)

Parameters:

is -

Method Details

read

public int read()
         throws IOException

Reads the next byte of data from this input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

Overrides:

read in class FilterInputStream

Returns:

the next byte of data or -1 if the end of stream is reached

Throws:

IOException - if an I/O error occurs

read

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

Reads up to len bytes of data from this input stream into an array of bytes. This method blocks until some input is available.

Overrides:

read in class FilterInputStream

Parameters:

b - the buffer into which the data is read

off - the start offset in the buffer to write the data

len - the maximum number of bytes to read

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:

IOException - if an I/O error occurs

read

public int read(byte[] b)
         throws IOException

Reads up to byte.length bytes of data from this input stream into an array of bytes. This method blocks until some input is available.

Overrides:

read in class FilterInputStream

Returns:

the total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:

IOException - if an I/O error occurs

skip

public long skip(long n)
          throws IOException

Skips over and discards n bytes of data from the input stream. The skip method may, for a variety of reasons, end up skipping over some smaller number of bytes, possibly 0. The actual number of bytes skipped is returned.

Overrides:

skip in class FilterInputStream

Parameters:

n - the number of bytes to be skipped

Returns:

the actual number of bytes skipped

Throws:

IOException - if an I/O error occurs

getOffset

public long getOffset()

Get the offset in the wrapped stream since the creation of this wrapper.

Returns:

the offset in bytes