Package com.sun.media.imageio.stream
Class FileChannelImageOutputStream
- java.lang.Object
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- javax.imageio.stream.ImageInputStreamImpl
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- javax.imageio.stream.ImageOutputStreamImpl
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- com.sun.media.imageio.stream.FileChannelImageOutputStream
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- All Implemented Interfaces:
Closeable
,DataInput
,DataOutput
,AutoCloseable
,ImageInputStream
,ImageOutputStream
public class FileChannelImageOutputStream extends ImageOutputStreamImpl
A class which implementsImageOutputStream
using aFileChannel
as the eventual data destination.Memory mapping is used for reading and direct buffers for writing. Only methods which provide significant performance improvement with respect to the superclass implementation are overridden. Overridden methods are not commented individually unless some noteworthy aspect of the implementation must be described.
The methods of this class are not synchronized.
- See Also:
ImageOutputStream
,java.nio
,FileChannel
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Field Summary
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Fields inherited from class javax.imageio.stream.ImageInputStreamImpl
bitOffset, byteOrder, flushedPos, streamPos
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Constructor Summary
Constructors Constructor Description FileChannelImageOutputStream(FileChannel channel)
Constructs aFileChannelImageOutputStream
from aFileChannel
.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
close()
Invokes the superclass method, writes any unwritten data, and sets the internal reference to the sourceFileChannel
tonull
.long
length()
Returns the number of bytes currently in theFileChannel
.int
read()
int
read(byte[] b, int off, int len)
void
readFully(char[] c, int off, int len)
void
readFully(double[] d, int off, int len)
void
readFully(float[] f, int off, int len)
void
readFully(int[] i, int off, int len)
void
readFully(long[] l, int off, int len)
void
readFully(short[] s, int off, int len)
void
seek(long pos)
Invokes the superclass method, writes any unwritten data, and sets the channel position to the supplied parameter.void
setByteOrder(ByteOrder networkByteOrder)
void
write(byte[] b, int off, int len)
void
write(int b)
void
writeChars(char[] c, int off, int len)
void
writeDoubles(double[] d, int off, int len)
void
writeFloats(float[] f, int off, int len)
void
writeInts(int[] i, int off, int len)
void
writeLongs(long[] l, int off, int len)
void
writeShorts(short[] s, int off, int len)
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Methods inherited from class javax.imageio.stream.ImageOutputStreamImpl
flushBits, write, writeBit, writeBits, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF
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Methods inherited from class javax.imageio.stream.ImageInputStreamImpl
checkClosed, finalize, flush, flushBefore, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, mark, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF, reset, setBitOffset, skipBytes, skipBytes
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Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface javax.imageio.stream.ImageInputStream
flush, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, isCached, isCachedFile, isCachedMemory, mark, read, readBit, readBits, readBoolean, readByte, readBytes, readChar, readDouble, readFloat, readFully, readFully, readInt, readLine, readLong, readShort, readUnsignedByte, readUnsignedInt, readUnsignedShort, readUTF, reset, setBitOffset, skipBytes, skipBytes
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Methods inherited from interface javax.imageio.stream.ImageOutputStream
flushBefore
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Constructor Detail
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FileChannelImageOutputStream
public FileChannelImageOutputStream(FileChannel channel) throws IOException
Constructs aFileChannelImageOutputStream
from aFileChannel
. The initial position of the stream stream is taken to be the position of theFileChannel
parameter when this constructor is invoked. The stream and flushed positions are therefore both initialized tochannel.position()
.- Parameters:
channel
- the destinationFileChannel
.- Throws:
IllegalArgumentException
- ifchannel
isnull
or is not open.IOException
- if a method invoked onchannel
throws anIOException
.
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Method Detail
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read
public int read() throws IOException
- Specified by:
read
in interfaceImageInputStream
- Specified by:
read
in classImageInputStreamImpl
- Throws:
IOException
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read
public int read(byte[] b, int off, int len) throws IOException
- Specified by:
read
in interfaceImageInputStream
- Specified by:
read
in classImageInputStreamImpl
- Throws:
IOException
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write
public void write(int b) throws IOException
- Specified by:
write
in interfaceDataOutput
- Specified by:
write
in interfaceImageOutputStream
- Specified by:
write
in classImageOutputStreamImpl
- Throws:
IOException
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write
public void write(byte[] b, int off, int len) throws IOException
- Specified by:
write
in interfaceDataOutput
- Specified by:
write
in interfaceImageOutputStream
- Specified by:
write
in classImageOutputStreamImpl
- Throws:
IOException
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readFully
public void readFully(char[] c, int off, int len) throws IOException
- Specified by:
readFully
in interfaceImageInputStream
- Overrides:
readFully
in classImageInputStreamImpl
- Throws:
IOException
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readFully
public void readFully(short[] s, int off, int len) throws IOException
- Specified by:
readFully
in interfaceImageInputStream
- Overrides:
readFully
in classImageInputStreamImpl
- Throws:
IOException
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readFully
public void readFully(int[] i, int off, int len) throws IOException
- Specified by:
readFully
in interfaceImageInputStream
- Overrides:
readFully
in classImageInputStreamImpl
- Throws:
IOException
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readFully
public void readFully(long[] l, int off, int len) throws IOException
- Specified by:
readFully
in interfaceImageInputStream
- Overrides:
readFully
in classImageInputStreamImpl
- Throws:
IOException
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readFully
public void readFully(float[] f, int off, int len) throws IOException
- Specified by:
readFully
in interfaceImageInputStream
- Overrides:
readFully
in classImageInputStreamImpl
- Throws:
IOException
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readFully
public void readFully(double[] d, int off, int len) throws IOException
- Specified by:
readFully
in interfaceImageInputStream
- Overrides:
readFully
in classImageInputStreamImpl
- Throws:
IOException
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writeChars
public void writeChars(char[] c, int off, int len) throws IOException
- Specified by:
writeChars
in interfaceImageOutputStream
- Overrides:
writeChars
in classImageOutputStreamImpl
- Throws:
IOException
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writeShorts
public void writeShorts(short[] s, int off, int len) throws IOException
- Specified by:
writeShorts
in interfaceImageOutputStream
- Overrides:
writeShorts
in classImageOutputStreamImpl
- Throws:
IOException
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writeInts
public void writeInts(int[] i, int off, int len) throws IOException
- Specified by:
writeInts
in interfaceImageOutputStream
- Overrides:
writeInts
in classImageOutputStreamImpl
- Throws:
IOException
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writeLongs
public void writeLongs(long[] l, int off, int len) throws IOException
- Specified by:
writeLongs
in interfaceImageOutputStream
- Overrides:
writeLongs
in classImageOutputStreamImpl
- Throws:
IOException
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writeFloats
public void writeFloats(float[] f, int off, int len) throws IOException
- Specified by:
writeFloats
in interfaceImageOutputStream
- Overrides:
writeFloats
in classImageOutputStreamImpl
- Throws:
IOException
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writeDoubles
public void writeDoubles(double[] d, int off, int len) throws IOException
- Specified by:
writeDoubles
in interfaceImageOutputStream
- Overrides:
writeDoubles
in classImageOutputStreamImpl
- Throws:
IOException
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close
public void close() throws IOException
Invokes the superclass method, writes any unwritten data, and sets the internal reference to the sourceFileChannel
tonull
. The sourceFileChannel
is not closed.- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Specified by:
close
in interfaceImageInputStream
- Overrides:
close
in classImageInputStreamImpl
- Throws:
IOException
- if an error occurs.
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length
public long length()
Returns the number of bytes currently in theFileChannel
. If anIOException
is encountered when querying the channel's size, -1L will be returned.- Specified by:
length
in interfaceImageInputStream
- Overrides:
length
in classImageInputStreamImpl
- Returns:
- The number of bytes in the channel -1L to indicate unknown length.
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seek
public void seek(long pos) throws IOException
Invokes the superclass method, writes any unwritten data, and sets the channel position to the supplied parameter.- Specified by:
seek
in interfaceImageInputStream
- Overrides:
seek
in classImageInputStreamImpl
- Throws:
IOException
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setByteOrder
public void setByteOrder(ByteOrder networkByteOrder)
- Specified by:
setByteOrder
in interfaceImageInputStream
- Overrides:
setByteOrder
in classImageInputStreamImpl
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