Class MemoryCacheImageOutputStream

All Implemented Interfaces:
Closeable, DataInput, DataOutput, AutoCloseable, ImageInputStream, ImageOutputStream 
public class MemoryCacheImageOutputStream
extends ImageOutputStreamImpl

An implementation of ImageOutputStream that writes its output to a regular OutputStream. A memory buffer is used to cache at least the data between the discard position and the current write position. The only constructor takes an OutputStream, so this class may not be used for read/modify/write operations. Reading can occur only on parts of the stream that have already been written to the cache and not yet flushed.

Fields

Fields declared in class javax.imageio.stream.ImageInputStreamImpl

bitOffset, byteOrder, flushedPos, streamPos

Constructors

Constructor Description
MemoryCacheImageOutputStream​(OutputStream stream)

Constructs a MemoryCacheImageOutputStream that will write to a given OutputStream.

Methods

Modifier and Type Method Description
void close()

Closes this MemoryCacheImageOutputStream.
boolean isCached()

Returns true since this ImageOutputStream caches data in order to allow seeking backwards.
boolean isCachedFile()

Returns false since this ImageOutputStream does not maintain a file cache.
boolean isCachedMemory()

Returns true since this ImageOutputStream maintains a main memory cache.

Methods declared in class javax.imageio.stream.ImageOutputStreamImpl

flushBits

Methods declared in class javax.imageio.stream.ImageInputStreamImpl

checkClosed, finalize, length, mark, read, read, read, reset, skipBytes, skipBytes

Methods declared in class java.lang.Object

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

Methods declared in interface javax.imageio.stream.ImageInputStream

flush, getBitOffset, getByteOrder, getFlushedPosition, getStreamPosition, length, mark, read, read, 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, reset, seek, setBitOffset, setByteOrder, skipBytes, skipBytes

Methods declared in interface javax.imageio.stream.ImageOutputStream

flushBefore, write, write, write, writeBit, writeBits, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeChars, writeDouble, writeDoubles, writeFloat, writeFloats, writeInt, writeInts, writeLong, writeLongs, writeShort, writeShorts, writeUTF

Constructors

MemoryCacheImageOutputStream

public MemoryCacheImageOutputStream(OutputStream stream)

Constructs a MemoryCacheImageOutputStream that will write to a given OutputStream.

Parameters:
stream - an OutputStream to write to.
Throws:
IllegalArgumentException - if stream is null.

Methods

isCached

public boolean isCached()

Returns true since this ImageOutputStream caches data in order to allow seeking backwards.

Specified by:
isCached in interface ImageInputStream
Overrides:
isCached in class ImageInputStreamImpl
Returns:
true.
See Also:
isCachedMemory(), isCachedFile()

isCachedFile

public boolean isCachedFile()

Returns false since this ImageOutputStream does not maintain a file cache.

Specified by:
isCachedFile in interface ImageInputStream
Overrides:
isCachedFile in class ImageInputStreamImpl
Returns:
false.
See Also:
isCached(), isCachedMemory()

isCachedMemory

public boolean isCachedMemory()

Returns true since this ImageOutputStream maintains a main memory cache.

Specified by:
isCachedMemory in interface ImageInputStream
Overrides:
isCachedMemory in class ImageInputStreamImpl
Returns:
true.
See Also:
isCached(), isCachedFile()

close

public void close()
           throws IOException

Closes this MemoryCacheImageOutputStream. All pending data is flushed to the output, and the cache is released. The destination OutputStream is not closed.

Throws:
IOException - if an I/O error occurs.

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Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
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https://docs.oracle.com/en/java/javase/11/docs/api/java.desktop/javax/imageio/stream/MemoryCacheImageOutputStream.html