Known Direct Subclasses |
Known Indirect Subclasses |
This class implements a stream filter for uncompressing data in the "deflate" compression format. It is also used as the basis for other decompression filters, such as GZIPInputStream.
See Also
Field Summary
protected byte[] | buf | Input buffer for decompression. |
protected boolean | closed | This field is deprecated. This field will be removed from a future version of Android and should not be used. Subclasses that access this field need to be modified to keep track of their own closed state by overriding close(). |
protected Inflater | inf | Decompressor for this stream. |
protected int | len | Length of input buffer. |
Inherited Field Summary
Public Constructor Summary
InflaterInputStream(InputStream in, Inflater inf, int size)
Creates a new input stream with the specified decompressor and
buffer size.
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|
InflaterInputStream(InputStream in, Inflater inf)
Creates a new input stream with the specified decompressor and a
default buffer size.
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InflaterInputStream(InputStream in)
Creates a new input stream with a default decompressor and buffer size.
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Public Method Summary
int |
available()
Returns 0 after EOF has been reached, otherwise always return 1.
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void |
close()
Closes this input stream and releases any system resources associated
with the stream.
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synchronized void |
mark(int readlimit)
Marks the current position in this input stream.
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boolean |
markSupported()
Tests if this input stream supports the
mark and
reset methods. |
int |
read()
Reads a byte of uncompressed data.
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int |
read(byte[] b, int off, int len)
Reads uncompressed data into an array of bytes.
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synchronized void |
reset()
Repositions this stream to the position at the time the
mark method was last called on this input stream. |
long |
skip(long n)
Skips specified number of bytes of uncompressed data.
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Protected Method Summary
void |
fill()
Fills input buffer with more data to decompress.
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Inherited Method Summary
Fields
protected byte[] buf
Input buffer for decompression.
protected boolean closed
This field is deprecated.
This field will be removed from a future version of Android and should not be
used. Subclasses that access this field need to be modified to keep track of their own
closed state by overriding close().
Indicates whether the close()
method has been called, internal use only.
protected int len
Length of input buffer.
Public Constructors
public InflaterInputStream (InputStream in, Inflater inf, int size)
Creates a new input stream with the specified decompressor and buffer size.
Parameters
in | the input stream |
---|---|
inf | the decompressor ("inflater") |
size | the input buffer size |
Throws
IllegalArgumentException | if size <= 0
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public InflaterInputStream (InputStream in, Inflater inf)
Creates a new input stream with the specified decompressor and a default buffer size.
Parameters
in | the input stream |
---|---|
inf | the decompressor ("inflater") |
public InflaterInputStream (InputStream in)
Creates a new input stream with a default decompressor and buffer size.
Parameters
in | the input stream |
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Public Methods
public int available ()
Returns 0 after EOF has been reached, otherwise always return 1.
Programs should not count on this method to return the actual number of bytes that could be read without blocking.
Returns
- 1 before EOF and 0 after EOF.
Throws
IOException | if an I/O error occurs. |
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public void close ()
Closes this input stream and releases any system resources associated with the stream.
Throws
IOException | if an I/O error has occurred |
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public synchronized void mark (int readlimit)
Marks the current position in this input stream.
The mark
method of InflaterInputStream
does nothing.
Parameters
readlimit | the maximum limit of bytes that can be read before the mark position becomes invalid. |
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See Also
public boolean markSupported ()
Tests if this input stream supports the mark
and
reset
methods. The markSupported
method of InflaterInputStream
returns
false
.
Returns
- a
boolean
indicating if this stream type supports themark
andreset
methods.
public int read ()
Reads a byte of uncompressed data. This method will block until enough input is available for decompression.
Returns
- the byte read, or -1 if end of compressed input is reached
Throws
IOException | if an I/O error has occurred |
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public int read (byte[] b, int off, int len)
Reads uncompressed data into an array of bytes. If len
is not
zero, the method will block until some input can be decompressed; otherwise,
no bytes are read and 0
is returned.
Parameters
b | the buffer into which the data is read |
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off | the start offset in the destination array b |
len | the maximum number of bytes read |
Returns
- the actual number of bytes read, or -1 if the end of the compressed input is reached or a preset dictionary is needed
Throws
NullPointerException | If b is null . |
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IndexOutOfBoundsException | If off is negative,
len is negative, or len is greater than
b.length - off |
ZipException | if a ZIP format error has occurred |
IOException | if an I/O error has occurred |
public synchronized void reset ()
Repositions this stream to the position at the time the
mark
method was last called on this input stream.
The method reset
for class
InflaterInputStream
does nothing except throw an
IOException
.
Throws
IOException | if this method is invoked. |
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See Also
public long skip (long n)
Skips specified number of bytes of uncompressed data.
Parameters
n | the number of bytes to skip |
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Returns
- the actual number of bytes skipped.
Throws
IOException | if an I/O error has occurred |
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IllegalArgumentException | if n < 0
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Protected Methods
protected void fill ()
Fills input buffer with more data to decompress.
Throws
IOException | if an I/O error has occurred |
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