org.apache.commons.fileupload.util

Class LimitedInputStream

java.lang.Object

java.io.InputStream

java.io.FilterInputStream

org.apache.commons.fileupload.util.LimitedInputStream

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable

public abstract class LimitedInputStream
extends java.io.FilterInputStream
implements Closeable

An input stream, which limits its data size. This stream is used, if the content length is unknown.

Constructor Summary

Constructors

Constructor and Description
LimitedInputStream(java.io.InputStream inputStream, long pSizeMax) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
void	close() Closes this input stream and releases any system resources associated with the stream.
boolean	isClosed() Returns, whether this stream is already closed.
int	read() Reads the next byte of data from this input stream.
int	read(byte[] b, int off, int len) Reads up to len bytes of data from this input stream into an array of bytes.

Methods inherited from class java.io.FilterInputStream

available, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

LimitedInputStream

public LimitedInputStream(java.io.InputStream inputStream,
                          long pSizeMax)

Creates a new instance.

Parameters:

inputStream - The input stream, which shall be limited.

pSizeMax - The limit; no more than this number of bytes shall be returned by the source stream.

Method Detail

read

public int read()
         throws java.io.IOException

Reads the next byte of data from this 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. This method blocks until input data is available, the end of the stream is detected, or an exception is thrown.

This method simply performs in.read() and returns the result.

Overrides:

read in class java.io.FilterInputStream

Returns:

the next byte of data, or -1 if the end of the stream is reached.

Throws:

java.io.IOException - if an I/O error occurs.

See Also:

FilterInputStream.in

read

public int read(byte[] b,
                int off,
                int len)
         throws java.io.IOException

Reads up to len bytes of data from this input stream 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.

This method simply performs in.read(b, off, len) and returns the result.

Overrides:

read in class java.io.FilterInputStream

Parameters:

b - 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 total number of bytes read into the buffer, or -1 if there is no more data because the end of the stream has been reached.

Throws:

java.lang.NullPointerException - If b is null.

java.lang.IndexOutOfBoundsException - If off is negative, len is negative, or len is greater than b.length - off

java.io.IOException - if an I/O error occurs.

See Also:

FilterInputStream.in

isClosed

public boolean isClosed()
                 throws java.io.IOException

Returns, whether this stream is already closed.

Returns:

True, if the stream is closed, otherwise false.

Throws:

java.io.IOException - An I/O error occurred.

close

public void close()
           throws java.io.IOException

Closes this input stream and releases any system resources associated with the stream. This method simply performs in.close().

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface java.lang.AutoCloseable

Overrides:

close in class java.io.FilterInputStream

Throws:

java.io.IOException - if an I/O error occurs.

See Also:

FilterInputStream.in