This class is a subclass of
java.io.FilterInputStream; it allows a stream to
be read and a checksum computed on its contents at the same time.
This is useful when you want to check the integrity of a stream of
data against a published checksum value. To create a
CheckedInputStream, you must specify both the
stream it should read and a Checksum object, such
as CRC32, that implements the particular checksum
algorithm you desire. The read( ) and
skip( ) methods are the same as those of other
input streams. As bytes are read, they are incorporated into the
checksum that is being computed. The getChecksum(
) method does not return the checksum value itself, but
rather the Checksum object. You must call the
getValue( ) method of this object to obtain the
checksum value.
public class CheckedInputStream extends java.io.FilterInputStream {
// Public Constructors
public CheckedInputStream(java.io.InputStream in, Checksum cksum);
// Public Instance Methods
public Checksum getChecksum( );
// Public Methods Overriding FilterInputStream
public int read( ) throws java.io.IOException;
public int read(byte[ ] buf, int off, int len) throws java.io.IOException;
public long skip(long n) throws java.io.IOException;
}
