it.geosolutions.imageio.stream.input.compressed

Class InflaterImageInputStream

java.lang.Object

javax.imageio.stream.ImageInputStreamImpl

it.geosolutions.imageio.stream.input.FilterImageInputStream

it.geosolutions.imageio.stream.input.compressed.InflaterImageInputStream

All Implemented Interfaces:

Closeable, DataInput, AutoCloseable, ImageInputStream

Direct Known Subclasses:

GZIPImageInputStream

public class InflaterImageInputStream
extends FilterImageInputStream

Author:

Simone Giannecchini, GeoSolutions

Field Summary

Fields

Modifier and Type	Field and Description
protected byte[]	buf Input buffer for decompression.
protected boolean	closed
protected Inflater	inf Decompressor for this stream.
protected int	len Length of input buffer.
protected byte[]	singleByteBuf
protected boolean	usesDefaultInflater

Fields inherited from class it.geosolutions.imageio.stream.input.FilterImageInputStream

iis

Fields inherited from class javax.imageio.stream.ImageInputStreamImpl

bitOffset, byteOrder, flushedPos, streamPos

Constructor Summary

Constructors

Constructor and Description
InflaterImageInputStream(ImageInputStream iis)
InflaterImageInputStream(ImageInputStream iis, Inflater inflater)
InflaterImageInputStream(ImageInputStream iis, Inflater inflater, int size)

Method Summary

Modifier and Type	Method and Description
void	close() Closes this input stream and releases any system resources associated with the stream.
protected void	fill() Fills input buffer with more data to decompress.
void	mark()
int	read() Reads a byte of uncompressed data.
int	read(byte[] b, int off, int len) Reads uncompressed data into an array of bytes.
void	reset()
void	seek(long pos)
int	skipBytes(int n)
long	skipBytes(long n) Skips specified number of bytes of uncompressed data.

Methods inherited from class it.geosolutions.imageio.stream.input.FilterImageInputStream

getByteOrder, isCached, isCachedFile, isCachedMemory, setBitOffset, setByteOrder

Methods inherited from class javax.imageio.stream.ImageInputStreamImpl

checkClosed, finalize, flush, flushBefore, getBitOffset, getFlushedPosition, getStreamPosition, length, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.imageio.stream.ImageInputStream

flush, flushBefore, getBitOffset, getFlushedPosition, getStreamPosition, length, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF

Field Detail

len

protected int len

Length of input buffer.

closed

protected boolean closed

buf

protected byte[] buf

Input buffer for decompression.

singleByteBuf

protected byte[] singleByteBuf

usesDefaultInflater

protected boolean usesDefaultInflater

inf

protected Inflater inf

Decompressor for this stream.

Constructor Detail

InflaterImageInputStream

public InflaterImageInputStream(ImageInputStream iis)

InflaterImageInputStream

public InflaterImageInputStream(ImageInputStream iis,
                                Inflater inflater)

InflaterImageInputStream

public InflaterImageInputStream(ImageInputStream iis,
                                Inflater inflater,
                                int size)

Method Detail

read

public int read()
         throws IOException

Reads a byte of uncompressed data. This method will block until enough input is available for decompression.

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Returns:

the byte read, or -1 if end of compressed input is reached

Throws:

IOException - if an I/O error has occurred

read

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

Reads uncompressed data into an array of bytes. This method will block until some input can be decompressed.

Specified by:

read in interface ImageInputStream

Specified by:

read in class ImageInputStreamImpl

Parameters:

b - the buffer into which the data is read

off - the start offset of the data

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:

ZipException - if a ZIP format error has occurred

IOException - if an I/O error has occurred

fill

protected void fill()
             throws IOException

Fills input buffer with more data to decompress.

Throws:

IOException - if an I/O error has occurred

close

public void close()
           throws IOException

Closes this input stream and releases any system resources associated with the stream.

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

Specified by:

close in interface ImageInputStream

Overrides:

close in class ImageInputStreamImpl

Throws:

IOException - if an I/O error has occurred

mark

public void mark()

Specified by:

mark in interface ImageInputStream

Overrides:

mark in class ImageInputStreamImpl

reset

public void reset()
           throws IOException

Specified by:

reset in interface ImageInputStream

Overrides:

reset in class ImageInputStreamImpl

Throws:

IOException

seek

public void seek(long pos)
          throws IOException

Specified by:

seek in interface ImageInputStream

Overrides:

seek in class ImageInputStreamImpl

Throws:

IOException

skipBytes

public int skipBytes(int n)
              throws IOException

Specified by:

skipBytes in interface DataInput

Specified by:

skipBytes in interface ImageInputStream

Overrides:

skipBytes in class FilterImageInputStream

Throws:

IOException

skipBytes

public long skipBytes(long n)
               throws IOException

Skips specified number of bytes of uncompressed data.

Specified by:

skipBytes in interface ImageInputStream

Overrides:

skipBytes in class ImageInputStreamImpl

Parameters:

n - the number of bytes to skip

Returns:

the actual number of bytes skipped.

Throws:

IOException - if an I/O error has occurred

IllegalArgumentException - if n < 0