org.zkoss.image
Class AImage

java.lang.Object
  org.zkoss.image.AImage

All Implemented Interfaces:

Image, Media

public class AImage
extends java.lang.Object
implements Image

Represents an image. Unlike java.awt.Image and javax.swing.ImageIcon, this class holds the raw image data, i.e., the original format, as opaque.

In other words, it is used to retrieve and store the opaque data as polymorphic thru the Media interface.

Author:

tomyeh

Constructor Summary

AImage(java.io.File file)

AImage(java.lang.String filename)

AImage(java.lang.String name, byte[] data)
the hash code.

AImage(java.lang.String name, java.io.InputStream is)

AImage(java.net.URL url)

Method Summary

byte[]	getByteData() Returns the raw data in byte array.
java.lang.String	getContentType() Returns the content type, e.g., "image/jpeg", or null if not available.
java.lang.String	getFormat() Returns the format name, e.g., "jpeg", or null if not available.
int	getHeight() Returns the height.
java.lang.String	getName() Returns the name (usually filename) of this media, or null if not available.
java.io.Reader	getReaderData() Always throws IllegalStateException.
java.io.InputStream	getStreamData() An input stream on top of getByteData().
java.lang.String	getStringData() Always throws IllegalStateException.
int	getWidth() Returns the width.
boolean	inMemory() Returns whether the data is cached in memory (in form of byte[] or String).
boolean	isBinary() Returns whether the format of tis content is binary or text-based.
javax.swing.ImageIcon	toImageIcon() Converts to an image icon.

Methods inherited from class java.lang.Object

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

Constructor Detail

AImage

public AImage(java.lang.String name,
              byte[] data)
       throws java.io.IOException

the hash code.

Throws:

java.io.IOException

AImage

public AImage(java.lang.String name,
              java.io.InputStream is)
       throws java.io.IOException

Throws:

java.io.IOException

AImage

public AImage(java.lang.String filename)
       throws java.io.IOException

Throws:

java.io.IOException

AImage

public AImage(java.io.File file)
       throws java.io.IOException

Throws:

java.io.IOException

AImage

public AImage(java.net.URL url)
       throws java.io.IOException

Throws:

java.io.IOException

Method Detail

isBinary

public final boolean isBinary()

Description copied from interface: Media

Returns whether the format of tis content is binary or text-based. If true, use Media.getByteData() or Media.getStreamData(), depending on Media.inMemory(), to retrieve its content. If false, use Media.getStringData() or Media.getReaderData(), depending on Media.inMemory(), to retrieve its content.

To decide which API to use, you need to examine both Media.isBinary() and Media.inMemory().

Specified by:

isBinary in interface Media

See Also:

Media.getStringData(), Media.getByteData(), Media.getReaderData(), Media.getStreamData()

inMemory

public final boolean inMemory()

Description copied from interface: Media

Returns whether the data is cached in memory (in form of byte[] or String). If true, use Media.getByteData() or Media.getStringData(), depending on Media.isBinary(), to retrieve its content. If false, use Media.getStreamData() or Media.getReaderData(), depending on Media.isBinary(), to retrieve its content.

To decide which API to use, you need to examine both Media.isBinary() and Media.inMemory().

Specified by:

inMemory in interface Media

See Also:

Media.getStringData(), Media.getByteData(), Media.getReaderData(), Media.getStreamData()

getByteData

public byte[] getByteData()

Description copied from interface: Media

Returns the raw data in byte array.

It might not be a copy, so don't modify it directly unless you know what you are doing.

Specified by:

getByteData in interface Media

See Also:

Media.getStringData()

getStringData

public final java.lang.String getStringData()

Always throws IllegalStateException.

Specified by:

getStringData in interface Media

See Also:

Media.getByteData()

getStreamData

public final java.io.InputStream getStreamData()

An input stream on top of getByteData().

Specified by:

getStreamData in interface Media

See Also:

Media.getReaderData()

getReaderData

public final java.io.Reader getReaderData()

Always throws IllegalStateException.

Specified by:

getReaderData in interface Media

See Also:

Media.getStreamData()

getName

public final java.lang.String getName()

Description copied from interface: Media

Returns the name (usually filename) of this media, or null if not available.

Specified by:

getName in interface Media

getFormat

public final java.lang.String getFormat()

Description copied from interface: Media

Returns the format name, e.g., "jpeg", or null if not available.

Specified by:

getFormat in interface Media

See Also:

Media.getContentType()

getContentType

public final java.lang.String getContentType()

Description copied from interface: Media

Returns the content type, e.g., "image/jpeg", or null if not available.

Specified by:

getContentType in interface Media

See Also:

Media.getFormat()

getWidth

public final int getWidth()

Returns the width.

Specified by:

getWidth in interface Image

getHeight

public final int getHeight()

Returns the height.

Specified by:

getHeight in interface Image

toImageIcon

public final javax.swing.ImageIcon toImageIcon()

Converts to an image icon.

Specified by:

toImageIcon in interface Image