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java.lang.Objectjava.io.InputStream
java.io.FilterInputStream
org.apache.wicket.util.upload.LimitedInputStream
public abstract class LimitedInputStream
An input stream, which limits its data size. This stream is used, if the content length is unknown.
Field Summary |
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Fields inherited from class java.io.FilterInputStream |
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in |
Constructor Summary | |
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LimitedInputStream(InputStream pIn,
long pSizeMax)
Creates a new instance. |
Method Summary | |
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void |
close()
Closes this input stream and releases any system resources associated with the stream. |
boolean |
isClosed()
Returns, whether this stream is already closed. |
protected abstract void |
raiseError(long pSizeMax,
long pCount)
Called to indicate, that the input streams limit has been exceeded. |
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 |
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available, mark, markSupported, read, reset, skip |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public LimitedInputStream(InputStream pIn, long pSizeMax)
pIn
- 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 |
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protected abstract void raiseError(long pSizeMax, long pCount) throws IOException
pSizeMax
- The input streams limit, in bytes.pCount
- The actual number of bytes.
IOException
- The called method is expected to raise an IOException.public int read() throws IOException
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.
read
in class FilterInputStream
-1
if the end of the stream is reached.
IOException
- if an I/O error occurs.FilterInputStream.in
public int read(byte[] b, int off, int len) throws IOException
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.
read
in class FilterInputStream
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.
-1
if there is no
more data because the end of the stream has been reached.
NullPointerException
- If b
is null
.
IndexOutOfBoundsException
- If off
is negative, len
is negative, or
len
is greater than b.length - off
IOException
- if an I/O error occurs.FilterInputStream.in
public boolean isClosed() throws IOException
IOException
- An I/O error occurred.public void close() throws IOException
in.close()
.
close
in interface Closeable
close
in class FilterInputStream
IOException
- if an I/O error occurs.FilterInputStream.in
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