FileCacheImageOutputStream (Java Platform SE 7 ) (original) (raw)

java.lang.Object
- javax.imageio.stream.ImageInputStreamImpl
- - javax.imageio.stream.ImageOutputStreamImpl
    - - javax.imageio.stream.FileCacheImageOutputStream
All Implemented Interfaces:
Closeable, DataInput, DataOutput, AutoCloseable, ImageInputStream, ImageOutputStream

public class FileCacheImageOutputStream
extends ImageOutputStreamImpl
An implementation of ImageOutputStream that writes its output to a regular OutputStream. A file is used to cache data until it is flushed to the output stream.

Field Summary

 * ### Fields inherited from class javax.imageio.stream.[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")  
 `[bitOffset](../../../javax/imageio/stream/ImageInputStreamImpl.html#bitOffset), [byteOrder](../../../javax/imageio/stream/ImageInputStreamImpl.html#byteOrder), [flushedPos](../../../javax/imageio/stream/ImageInputStreamImpl.html#flushedPos), [streamPos](../../../javax/imageio/stream/ImageInputStreamImpl.html#streamPos)`

Constructor Summary

Constructors

Constructor and Description
FileCacheImageOutputStream(OutputStream stream,File cacheDir) Constructs a FileCacheImageOutputStream that will write to a given outputStream.

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Closes this FileCacheImageOutputStream.
void	flushBefore(long pos) Discards the initial portion of the stream prior to the indicated postion.
boolean	isCached() Returns true since thisImageOutputStream caches data in order to allow seeking backwards.
boolean	isCachedFile() Returns true since thisImageOutputStream maintains a file cache.
boolean	isCachedMemory() Returns false since thisImageOutputStream does not maintain a main memory cache.
long	length() Returns -1L to indicate that the stream has unknown length.
int	read() Reads a single byte from the stream and returns it as anint between 0 and 255.
int	read(byte[] b, int off, int len) Reads up to len bytes from the stream, and stores them into b starting at index off.
void	seek(long pos) Sets the current stream position and resets the bit offset to 0.
void	write(byte[] b, int off, int len) Writes a sequence of bytes to the stream at the current position.
void	write(int b) Writes a single byte to the stream at the current position.

   * ### Methods inherited from class javax.imageio.stream.[ImageOutputStreamImpl](../../../javax/imageio/stream/ImageOutputStreamImpl.html "class in javax.imageio.stream")  
   `[flushBits](../../../javax/imageio/stream/ImageOutputStreamImpl.html#flushBits%28%29), [write](../../../javax/imageio/stream/ImageOutputStreamImpl.html#write%28byte[]%29), [writeBit](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBit%28int%29), [writeBits](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBits%28long,%20int%29), [writeBoolean](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBoolean%28boolean%29), [writeByte](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeByte%28int%29), [writeBytes](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeBytes%28java.lang.String%29), [writeChar](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeChar%28int%29), [writeChars](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeChars%28char[],%20int,%20int%29), [writeChars](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeChars%28java.lang.String%29), [writeDouble](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeDouble%28double%29), [writeDoubles](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeDoubles%28double[],%20int,%20int%29), [writeFloat](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeFloat%28float%29), [writeFloats](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeFloats%28float[],%20int,%20int%29), [writeInt](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeInt%28int%29), [writeInts](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeInts%28int[],%20int,%20int%29), [writeLong](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeLong%28long%29), [writeLongs](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeLongs%28long[],%20int,%20int%29), [writeShort](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeShort%28int%29), [writeShorts](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeShorts%28short[],%20int,%20int%29), [writeUTF](../../../javax/imageio/stream/ImageOutputStreamImpl.html#writeUTF%28java.lang.String%29)`  
   * ### Methods inherited from class javax.imageio.stream.[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")  
   `[checkClosed](../../../javax/imageio/stream/ImageInputStreamImpl.html#checkClosed%28%29), [finalize](../../../javax/imageio/stream/ImageInputStreamImpl.html#finalize%28%29), [flush](../../../javax/imageio/stream/ImageInputStreamImpl.html#flush%28%29), [getBitOffset](../../../javax/imageio/stream/ImageInputStreamImpl.html#getBitOffset%28%29), [getByteOrder](../../../javax/imageio/stream/ImageInputStreamImpl.html#getByteOrder%28%29), [getFlushedPosition](../../../javax/imageio/stream/ImageInputStreamImpl.html#getFlushedPosition%28%29), [getStreamPosition](../../../javax/imageio/stream/ImageInputStreamImpl.html#getStreamPosition%28%29), [mark](../../../javax/imageio/stream/ImageInputStreamImpl.html#mark%28%29), [read](../../../javax/imageio/stream/ImageInputStreamImpl.html#read%28byte[]%29), [readBit](../../../javax/imageio/stream/ImageInputStreamImpl.html#readBit%28%29), [readBits](../../../javax/imageio/stream/ImageInputStreamImpl.html#readBits%28int%29), [readBoolean](../../../javax/imageio/stream/ImageInputStreamImpl.html#readBoolean%28%29), [readByte](../../../javax/imageio/stream/ImageInputStreamImpl.html#readByte%28%29), [readBytes](../../../javax/imageio/stream/ImageInputStreamImpl.html#readBytes%28javax.imageio.stream.IIOByteBuffer,%20int%29), [readChar](../../../javax/imageio/stream/ImageInputStreamImpl.html#readChar%28%29), [readDouble](../../../javax/imageio/stream/ImageInputStreamImpl.html#readDouble%28%29), [readFloat](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFloat%28%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28byte[]%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28byte[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28char[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28double[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28float[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28int[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28long[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28short[],%20int,%20int%29), [readInt](../../../javax/imageio/stream/ImageInputStreamImpl.html#readInt%28%29), [readLine](../../../javax/imageio/stream/ImageInputStreamImpl.html#readLine%28%29), [readLong](../../../javax/imageio/stream/ImageInputStreamImpl.html#readLong%28%29), [readShort](../../../javax/imageio/stream/ImageInputStreamImpl.html#readShort%28%29), [readUnsignedByte](../../../javax/imageio/stream/ImageInputStreamImpl.html#readUnsignedByte%28%29), [readUnsignedInt](../../../javax/imageio/stream/ImageInputStreamImpl.html#readUnsignedInt%28%29), [readUnsignedShort](../../../javax/imageio/stream/ImageInputStreamImpl.html#readUnsignedShort%28%29), [readUTF](../../../javax/imageio/stream/ImageInputStreamImpl.html#readUTF%28%29), [reset](../../../javax/imageio/stream/ImageInputStreamImpl.html#reset%28%29), [setBitOffset](../../../javax/imageio/stream/ImageInputStreamImpl.html#setBitOffset%28int%29), [setByteOrder](../../../javax/imageio/stream/ImageInputStreamImpl.html#setByteOrder%28java.nio.ByteOrder%29), [skipBytes](../../../javax/imageio/stream/ImageInputStreamImpl.html#skipBytes%28int%29), [skipBytes](../../../javax/imageio/stream/ImageInputStreamImpl.html#skipBytes%28long%29)`  
   * ### Methods inherited from class java.lang.[Object](../../../java/lang/Object.html "class in java.lang")  
   `[clone](../../../java/lang/Object.html#clone%28%29), [equals](../../../java/lang/Object.html#equals%28java.lang.Object%29), [getClass](../../../java/lang/Object.html#getClass%28%29), [hashCode](../../../java/lang/Object.html#hashCode%28%29), [notify](../../../java/lang/Object.html#notify%28%29), [notifyAll](../../../java/lang/Object.html#notifyAll%28%29), [toString](../../../java/lang/Object.html#toString%28%29), [wait](../../../java/lang/Object.html#wait%28%29), [wait](../../../java/lang/Object.html#wait%28long%29), [wait](../../../java/lang/Object.html#wait%28long,%20int%29)`  
   * ### Methods inherited from interface javax.imageio.stream.[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")  
   `[flush](../../../javax/imageio/stream/ImageInputStream.html#flush%28%29), [getBitOffset](../../../javax/imageio/stream/ImageInputStream.html#getBitOffset%28%29), [getByteOrder](../../../javax/imageio/stream/ImageInputStream.html#getByteOrder%28%29), [getFlushedPosition](../../../javax/imageio/stream/ImageInputStream.html#getFlushedPosition%28%29), [getStreamPosition](../../../javax/imageio/stream/ImageInputStream.html#getStreamPosition%28%29), [mark](../../../javax/imageio/stream/ImageInputStream.html#mark%28%29), [read](../../../javax/imageio/stream/ImageInputStream.html#read%28byte[]%29), [readBit](../../../javax/imageio/stream/ImageInputStream.html#readBit%28%29), [readBits](../../../javax/imageio/stream/ImageInputStream.html#readBits%28int%29), [readBoolean](../../../javax/imageio/stream/ImageInputStream.html#readBoolean%28%29), [readByte](../../../javax/imageio/stream/ImageInputStream.html#readByte%28%29), [readBytes](../../../javax/imageio/stream/ImageInputStream.html#readBytes%28javax.imageio.stream.IIOByteBuffer,%20int%29), [readChar](../../../javax/imageio/stream/ImageInputStream.html#readChar%28%29), [readDouble](../../../javax/imageio/stream/ImageInputStream.html#readDouble%28%29), [readFloat](../../../javax/imageio/stream/ImageInputStream.html#readFloat%28%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28byte[]%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28byte[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28char[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28double[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28float[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28int[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28long[],%20int,%20int%29), [readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28short[],%20int,%20int%29), [readInt](../../../javax/imageio/stream/ImageInputStream.html#readInt%28%29), [readLine](../../../javax/imageio/stream/ImageInputStream.html#readLine%28%29), [readLong](../../../javax/imageio/stream/ImageInputStream.html#readLong%28%29), [readShort](../../../javax/imageio/stream/ImageInputStream.html#readShort%28%29), [readUnsignedByte](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedByte%28%29), [readUnsignedInt](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedInt%28%29), [readUnsignedShort](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedShort%28%29), [readUTF](../../../javax/imageio/stream/ImageInputStream.html#readUTF%28%29), [reset](../../../javax/imageio/stream/ImageInputStream.html#reset%28%29), [setBitOffset](../../../javax/imageio/stream/ImageInputStream.html#setBitOffset%28int%29), [setByteOrder](../../../javax/imageio/stream/ImageInputStream.html#setByteOrder%28java.nio.ByteOrder%29), [skipBytes](../../../javax/imageio/stream/ImageInputStream.html#skipBytes%28int%29), [skipBytes](../../../javax/imageio/stream/ImageInputStream.html#skipBytes%28long%29)`

Constructor Detail

 * #### FileCacheImageOutputStream  
 public FileCacheImageOutputStream([OutputStream](../../../java/io/OutputStream.html "class in java.io") stream,  
                           [File](../../../java/io/File.html "class in java.io") cacheDir)  
                            throws [IOException](../../../java/io/IOException.html "class in java.io")  
 Constructs a `FileCacheImageOutputStream` that will write to a given `outputStream`.  
  A temporary file is used as a cache. If`cacheDir`is non-`null` and is a directory, the file will be created there. If it is`null`, the system-dependent default temporary-file directory will be used (see the documentation for`File.createTempFile` for details).  
 Parameters:  
 `stream` \- an `OutputStream` to write to.  
 `cacheDir` \- a `File` indicating where the cache file should be created, or `null` to use the system directory.  
 Throws:  
 `[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if `stream` is `null`.  
 `[IllegalArgumentException](../../../java/lang/IllegalArgumentException.html "class in java.lang")` \- if `cacheDir` is non-`null` but is not a directory.  
 `[IOException](../../../java/io/IOException.html "class in java.io")` \- if a cache file cannot be created.

Method Detail

* #### read  
public int read()  
         throws [IOException](../../../java/io/IOException.html "class in java.io")  
Reads a single byte from the stream and returns it as an`int` between 0 and 255\. If EOF is reached,`-1` is returned.  
 Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.  
 The bit offset within the stream must be reset to zero before the read occurs.  
**Specified by:**  
`[read](../../../javax/imageio/stream/ImageInputStream.html#read%28%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Specified by:**  
`[read](../../../javax/imageio/stream/ImageInputStreamImpl.html#read%28%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Returns:  
the value of the next byte in the stream, or `-1` if EOF is reached.  
Throws:  
`[IOException](../../../java/io/IOException.html "class in java.io")` \- if the stream has been closed.  
* #### read  
public int read(byte[] b,  
       int off,  
       int len)  
         throws [IOException](../../../java/io/IOException.html "class in java.io")  
Reads up to `len` bytes from the stream, and stores them into `b` starting at index `off`. If no bytes can be read because the end of the stream has been reached, `-1` is returned.  
 The bit offset within the stream must be reset to zero before the read occurs.  
 Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.  
**Specified by:**  
`[read](../../../javax/imageio/stream/ImageInputStream.html#read%28byte[],%20int,%20int%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Specified by:**  
`[read](../../../javax/imageio/stream/ImageInputStreamImpl.html#read%28byte[],%20int,%20int%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Parameters:  
`b` \- an array of bytes to be written to.  
`off` \- the starting position within `b` to write to.  
`len` \- the maximum number of bytes to read.  
Returns:  
the number of bytes actually read, or `-1` to indicate EOF.  
Throws:  
`[IOException](../../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs.  
* #### write  
public void write(int b)  
           throws [IOException](../../../java/io/IOException.html "class in java.io")  
Writes a single byte to the stream at the current position. The 24 high-order bits of `b` are ignored.  
 If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write. Implementers can use the[flushBits](../../../javax/imageio/stream/ImageOutputStreamImpl.html#flushBits%28%29) method of [ImageOutputStreamImpl](../../../javax/imageio/stream/ImageOutputStreamImpl.html "class in javax.imageio.stream") to guarantee this.  
**Specified by:**  
`[write](../../../java/io/DataOutput.html#write%28int%29)` in interface `[DataOutput](../../../java/io/DataOutput.html "interface in java.io")`  
**Specified by:**  
`[write](../../../javax/imageio/stream/ImageOutputStream.html#write%28int%29)` in interface `[ImageOutputStream](../../../javax/imageio/stream/ImageOutputStream.html "interface in javax.imageio.stream")`  
**Specified by:**  
`[write](../../../javax/imageio/stream/ImageOutputStreamImpl.html#write%28int%29)` in class `[ImageOutputStreamImpl](../../../javax/imageio/stream/ImageOutputStreamImpl.html "class in javax.imageio.stream")`  
Parameters:  
`b` \- an `int` whose lower 8 bits are to be written.  
Throws:  
`[IOException](../../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs.  
* #### write  
public void write(byte[] b,  
         int off,  
         int len)  
           throws [IOException](../../../java/io/IOException.html "class in java.io")  
Writes a sequence of bytes to the stream at the current position. If `len` is 0, nothing is written. The byte `b[off]` is written first, then the byte`b[off + 1]`, and so on.  
 If the bit offset within the stream is non-zero, the remainder of the current byte is padded with 0s and written out first. The bit offset will be 0 after the write. Implementers can use the[flushBits](../../../javax/imageio/stream/ImageOutputStreamImpl.html#flushBits%28%29) method of [ImageOutputStreamImpl](../../../javax/imageio/stream/ImageOutputStreamImpl.html "class in javax.imageio.stream") to guarantee this.  
**Specified by:**  
`[write](../../../java/io/DataOutput.html#write%28byte[],%20int,%20int%29)` in interface `[DataOutput](../../../java/io/DataOutput.html "interface in java.io")`  
**Specified by:**  
`[write](../../../javax/imageio/stream/ImageOutputStream.html#write%28byte[],%20int,%20int%29)` in interface `[ImageOutputStream](../../../javax/imageio/stream/ImageOutputStream.html "interface in javax.imageio.stream")`  
**Specified by:**  
`[write](../../../javax/imageio/stream/ImageOutputStreamImpl.html#write%28byte[],%20int,%20int%29)` in class `[ImageOutputStreamImpl](../../../javax/imageio/stream/ImageOutputStreamImpl.html "class in javax.imageio.stream")`  
Parameters:  
`b` \- an array of `byte`s to be written.  
`off` \- the start offset in the data.  
`len` \- the number of `byte`s to write.  
Throws:  
`[IOException](../../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs.  
* #### length  
public long length()  
Returns `-1L` to indicate that the stream has unknown length. Subclasses must override this method to provide actual length information.  
**Specified by:**  
`[length](../../../javax/imageio/stream/ImageInputStream.html#length%28%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Overrides:**  
`[length](../../../javax/imageio/stream/ImageInputStreamImpl.html#length%28%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Returns:  
\-1L to indicate unknown length.  
* #### seek  
public void seek(long pos)  
          throws [IOException](../../../java/io/IOException.html "class in java.io")  
Sets the current stream position and resets the bit offset to 0\. It is legal to seek past the end of the file; an`EOFException` will be thrown only if a read is performed. The file length will not be increased until a write is performed.  
**Specified by:**  
`[seek](../../../javax/imageio/stream/ImageInputStream.html#seek%28long%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Overrides:**  
`[seek](../../../javax/imageio/stream/ImageInputStreamImpl.html#seek%28long%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Parameters:  
`pos` \- a `long` containing the desired file pointer position.  
Throws:  
`[IndexOutOfBoundsException](../../../java/lang/IndexOutOfBoundsException.html "class in java.lang")` \- if `pos` is smaller than the flushed position.  
`[IOException](../../../java/io/IOException.html "class in java.io")` \- if any other I/O error occurs.  
* #### isCached  
public boolean isCached()  
Returns `true` since this`ImageOutputStream` caches data in order to allow seeking backwards.  
**Specified by:**  
`[isCached](../../../javax/imageio/stream/ImageInputStream.html#isCached%28%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Overrides:**  
`[isCached](../../../javax/imageio/stream/ImageInputStreamImpl.html#isCached%28%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Returns:  
`true`.  
See Also:  
[isCachedMemory()](../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedMemory%28%29), [isCachedFile()](../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedFile%28%29)  
* #### isCachedFile  
public boolean isCachedFile()  
Returns `true` since this`ImageOutputStream` maintains a file cache.  
**Specified by:**  
`[isCachedFile](../../../javax/imageio/stream/ImageInputStream.html#isCachedFile%28%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Overrides:**  
`[isCachedFile](../../../javax/imageio/stream/ImageInputStreamImpl.html#isCachedFile%28%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Returns:  
`true`.  
See Also:  
[isCached()](../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCached%28%29), [isCachedMemory()](../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedMemory%28%29)  
* #### isCachedMemory  
public boolean isCachedMemory()  
Returns `false` since this`ImageOutputStream` does not maintain a main memory cache.  
**Specified by:**  
`[isCachedMemory](../../../javax/imageio/stream/ImageInputStream.html#isCachedMemory%28%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Overrides:**  
`[isCachedMemory](../../../javax/imageio/stream/ImageInputStreamImpl.html#isCachedMemory%28%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Returns:  
`false`.  
See Also:  
[isCached()](../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCached%28%29), [isCachedFile()](../../../javax/imageio/stream/FileCacheImageOutputStream.html#isCachedFile%28%29)  
* #### close  
public void close()  
           throws [IOException](../../../java/io/IOException.html "class in java.io")  
Closes this `FileCacheImageOutputStream`. All pending data is flushed to the output, and the cache file is closed and removed. The destination `OutputStream` is not closed.  
**Specified by:**  
`[close](../../../java/io/Closeable.html#close%28%29)` in interface `[Closeable](../../../java/io/Closeable.html "interface in java.io")`  
**Specified by:**  
`[close](../../../java/lang/AutoCloseable.html#close%28%29)` in interface `[AutoCloseable](../../../java/lang/AutoCloseable.html "interface in java.lang")`  
**Specified by:**  
`[close](../../../javax/imageio/stream/ImageInputStream.html#close%28%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Overrides:**  
`[close](../../../javax/imageio/stream/ImageInputStreamImpl.html#close%28%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Throws:  
`[IOException](../../../java/io/IOException.html "class in java.io")` \- if an error occurs.  
* #### flushBefore  
public void flushBefore(long pos)  
                 throws [IOException](../../../java/io/IOException.html "class in java.io")  
Discards the initial portion of the stream prior to the indicated postion. Attempting to seek to an offset within the flushed portion of the stream will result in an`IndexOutOfBoundsException`.  
 Calling `flushBefore` may allow classes implementing this interface to free up resources such as memory or disk space that are being used to store data from the stream.  
**Specified by:**  
`[flushBefore](../../../javax/imageio/stream/ImageInputStream.html#flushBefore%28long%29)` in interface `[ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")`  
**Specified by:**  
`[flushBefore](../../../javax/imageio/stream/ImageOutputStream.html#flushBefore%28long%29)` in interface `[ImageOutputStream](../../../javax/imageio/stream/ImageOutputStream.html "interface in javax.imageio.stream")`  
**Overrides:**  
`[flushBefore](../../../javax/imageio/stream/ImageInputStreamImpl.html#flushBefore%28long%29)` in class `[ImageInputStreamImpl](../../../javax/imageio/stream/ImageInputStreamImpl.html "class in javax.imageio.stream")`  
Parameters:  
`pos` \- a `long` containing the length of the stream prefix that may be flushed.  
Throws:  
`[IOException](../../../java/io/IOException.html "class in java.io")` \- if an I/O error occurs.

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FileCacheImageOutputStream (Java Platform SE 7 ) (original) (raw)

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