Class ChecksumCalculatingInputStream
- java.lang.Object
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- java.io.InputStream
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- java.io.FilterInputStream
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- software.amazon.awssdk.services.s3.internal.checksums.ChecksumCalculatingInputStream
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- All Implemented Interfaces:
Closeable
,AutoCloseable
public class ChecksumCalculatingInputStream extends FilterInputStream
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Field Summary
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Fields inherited from class java.io.FilterInputStream
in
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Constructor Summary
Constructors Constructor Description ChecksumCalculatingInputStream(InputStream in, SdkChecksum cksum)
Creates an input stream using the specified Checksum.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description byte[]
getChecksumBytes()
int
read()
Reads from the underlying stream.int
read(byte[] buf, int off, int len)
Reads up to len bytes at a time from the input stream, updates the checksum.void
reset()
Resets stream state, including the running checksum.-
Methods inherited from class java.io.FilterInputStream
available, close, mark, markSupported, read, skip
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Constructor Detail
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ChecksumCalculatingInputStream
public ChecksumCalculatingInputStream(InputStream in, SdkChecksum cksum)
Creates an input stream using the specified Checksum.- Parameters:
in
- the input stream to readcksum
- the Checksum implementation to use for computing the checksum
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Method Detail
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read
public int read() throws IOException
Reads from the underlying stream. If the end of the stream is reached, the running checksum will be appended a byte at a time (1 per read call).- Overrides:
read
in classFilterInputStream
- Returns:
- byte read, if eos has been reached, -1 will be returned.
- Throws:
IOException
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read
public int read(byte[] buf, int off, int len) throws IOException
Reads up to len bytes at a time from the input stream, updates the checksum. If the end of the stream has been reached the checksum will be appended to the last 4 bytes.- Overrides:
read
in classFilterInputStream
- Parameters:
buf
- buffer to write intooff
- offset in the buffer to write tolen
- maximum number of bytes to attempt to read.- Returns:
- number of bytes written into buf, otherwise -1 will be returned to indicate eos.
- Throws:
IOException
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reset
public void reset() throws IOException
Resets stream state, including the running checksum.- Overrides:
reset
in classFilterInputStream
- Throws:
IOException
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getChecksumBytes
public byte[] getChecksumBytes()
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