com.amazonaws.util

Class ContentLengthValidationInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

com.amazonaws.util.ContentLengthValidationInputStream

All Implemented Interfaces:

Closeable, AutoCloseable

public class ContentLengthValidationInputStream
extends FilterInputStream

This class validates the Amazon S3 response for the content length as the data is read from the input stream.

Field Summary

Fields inherited from class java.io.FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
ContentLengthValidationInputStream(InputStream in, long expectedLength)

Method Summary

Methods

Modifier and Type	Method and Description
void	mark(int readlimit) Marks the current position in this input stream.
int	read() Reads the next byte of data from the input stream.
int	read(byte[] arg0, int off, int len) Reads up to len bytes of data from the input stream into an array of bytes.
void	reset() Repositions this stream to the position at the time the mark method was last called on this input stream if and only if mark is supported by the input stream.
long	skip(long n) Skips over and discards n bytes of data from this input stream.

Methods inherited from class java.io.FilterInputStream

available, close, markSupported, read

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContentLengthValidationInputStream

public ContentLengthValidationInputStream(InputStream in,
                                  long expectedLength)

Method Detail

read

public int read()
         throws IOException

Reads the next byte of data from the input stream. The value byte is returned as an int in the range 0 to 255. If no byte is available because the end of the stream has been reached, the value -1 is returned. If the result is not -1, then the number of bytes read is incremented by 1.

Overrides:

read in class FilterInputStream

Throws:

IOException

read

public int read(byte[] arg0,
       int off,
       int len)
         throws IOException

Reads up to len bytes of data from the input stream into an array of bytes. An attempt is made to read as many as len bytes, but a smaller number may be read. The number of bytes actually read is returned as an integer. If the result is not -1, the the number of bytes read is incremented by the result of the read operation.

Overrides:

read in class FilterInputStream

Throws:

IOException

skip

public long skip(long n)
          throws IOException

Skips over and discards n bytes of data from this input stream. Returns the number of bytes skipped from this stream. If the result is not -1, then the number of bytes is incremented by the total number of bytes skipped.

Overrides:

skip in class FilterInputStream

Throws:

IOException

mark

public void mark(int readlimit)

Marks the current position in this input stream. A subsequent call to the reset method repositions this stream at the last marked position so that subsequent reads re-read the same bytes. The readlimit arguments tells this input stream to allow that many bytes to be read before the mark position gets invalidated. The number of bytes read from this stream at this instance is noted so that on subsequent calls to reset, the bytesRead can be reset to this value if mark is success.

Overrides:

mark in class FilterInputStream

reset

public void reset()
           throws IOException

Repositions this stream to the position at the time the mark method was last called on this input stream if and only if mark is supported by the input stream. Resets the bytesRead parameter to the mark value.

Overrides:

reset in class FilterInputStream

Throws:

IOException