Class java.util.zip.CheckedInputStream





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Class java.util.zip.CheckedInputStream


java.lang.Object
|
+----java.io.InputStream
|
+----java.io.FilterInputStream
|
+----java.util.zip.CheckedInputStream



public class CheckedInputStream
extends FilterInputStream

An input stream that also maintains a checksum of the data being read.
The checksum can then be used to verify the integrity of the input data.


See Also:
Checksum








CheckedInputStream(InputStream, Checksum)
Creates an input stream using the specified Checksum.






getChecksum()
Returns the Checksum for this input stream.

read()
Reads a byte.

read(byte[], int, int)
Reads into an array of bytes.

skip(long)
Skips specified number of bytes of input.







CheckedInputStream

public CheckedInputStream(InputStream in,
Checksum cksum)


Creates an input stream using the specified Checksum.


Parameters:
in - the input stream
cksum - the Checksum







read

public int read() throws IOException


Reads a byte. Will block if no input is available.


Returns:
the byte read, or -1 if the end of the stream is reached.
Throws: IOException
if an I/O error has occurred
Overrides:
read in class FilterInputStream



read

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


Reads into an array of bytes. Will block until some input
is available.


Parameters:
buf - the buffer into which the data is read
off - the start offset of the data
len - the maximum number of bytes read
Returns:
the actual number of bytes read, or -1 if the end
of the stream is reached.
Throws: IOException
if an I/O error has occurred
Overrides:
read in class FilterInputStream



skip

public long skip(long n) throws IOException


Skips specified number of bytes of input.


Parameters:
n - the number of bytes to skip
Returns:
the actual number of bytes skipped
Throws: IOException
if an I/O error has occurred
Overrides:
skip in class FilterInputStream



getChecksum

public Checksum getChecksum()


Returns the Checksum for this input stream.




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