Class CheckedInputStream
java.lang.Object
java.io.InputStream
java.io.FilterInputStream
java.util.zip.CheckedInputStream
- All Implemented Interfaces:
Closeable,AutoCloseable
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.
- Since:
- 1.1
- See Also:
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Field Summary
Fields declared in class java.io.FilterInputStream
in -
Constructor Summary
ConstructorsConstructorDescriptionCheckedInputStream(InputStream in, Checksum cksum) Creates an input stream using the specified Checksum. -
Method Summary
Methods declared in class java.io.FilterInputStream
available, close, mark, markSupported, read, resetMethods declared in class java.io.InputStream
nullInputStream, readAllBytes, readNBytes, readNBytes, skipNBytes, transferTo
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Constructor Details
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CheckedInputStream
Creates an input stream using the specified Checksum.- Parameters:
in- the input streamcksum- the Checksum
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Method Details
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read
Reads a byte. Will block if no input is available.- Overrides:
readin classFilterInputStream- 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:
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read
Reads into an array of bytes. Iflenis not zero, the method blocks until some input is available; otherwise, no bytes are read and0is returned.- Overrides:
readin classFilterInputStream- Parameters:
buf- the buffer into which the data is readoff- the start offset in the destination arrayblen- 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- Ifbufisnull.IndexOutOfBoundsException- Ifoffis negative,lenis negative, orlenis greater thanbuf.length - offIOException- if an I/O error has occurred- See Also:
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skip
Skips specified number of bytes of input.- Overrides:
skipin classFilterInputStream- Parameters:
n- the number of bytes to skip- Returns:
- the actual number of bytes skipped
- Throws:
IOException- if an I/O error has occurred- See Also:
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getChecksum
Returns the Checksum for this input stream.- Returns:
- the Checksum value
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