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/OpenJDK 8

Class CheckedInputStream

All Implemented Interfaces:
Closeable, AutoCloseable
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

Fields

Fields inherited from class java.io.FilterInputStream

in

Constructors

CheckedInputStream

public CheckedInputStream(InputStream in,
                          Checksum cksum)

Creates an input stream using the specified Checksum.

Parameters:
in - the input stream
cksum - the Checksum

Methods

read

public int read()
         throws IOException

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

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

read

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

Reads into an array of bytes. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned.

Overrides:
read in class FilterInputStream
Parameters:
buf - the buffer into which the data is read
off - the start offset in the destination array b
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:
NullPointerException - If buf is null.
IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than buf.length - off
IOException - if an I/O error has occurred
See Also:
FilterInputStream.in

skip

public long skip(long n)
          throws IOException

Skips specified number of bytes of input.

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

getChecksum

public Checksum getChecksum()

Returns the Checksum for this input stream.

Returns:
the Checksum value

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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