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Image (JBoss Seam API Documentation) - JBoss Seam 1.2.1 API 英文版文档

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org.jboss.seam.core
Class Image

java.lang.Object
  org.jboss.seam.core.Image

All Implemented Interfaces:

Serializable

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@Name(value="org.jboss.seam.core.image")
@Scope(value=CONVERSATION)
@Install(precedence=0)
@Intercept(value=NEVER)
public class Image
extends Object
implements Serializable

Image manipulation and interrogation

Author:

pmuir

See Also:

Serialized Form

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Nested Class Summary
static class	Image.Type

 

Field Summary
static int	DEFAULT_IMAGE_TYPE
static int	PNG_IMAGE_TYPE

 

Constructor Summary
Image()

 

Method Summary
Image	adjustRatio(double desiredRatio, double precision)           Alter the ratio of the output image without altering the ratio of the input by adding transparent strips.
Image	blur(int radius)           Blur the output image using a convolution
BufferedImage	getBufferedImage()
Image.Type	getContentType()           The content type of the output image, by default DEFAULT_CONTENT_TYPE
Integer	getHeight()           The height of the image
byte[]	getImage()           Get the image as a byte[], any conversions having been applied.
Double	getRatio()           The aspect ratio of the image
Integer	getWidth()           The width of the image
static Image	instance()
Boolean	isRatio(double ratio, double precision)           Check whether the image is of a given ratio to within a given precision
Image	resize(int width, int height)           Resize the image to the given width and height, changing the ratio if necessary
Image	scale(double factor)           Scale the image by the given factor
Image	scaleToHeight(int height)           Scale the image to the given height
Image	scaleToWidth(int width)           Scale the image to the given width
void	setBufferedImage(BufferedImage bufferedImage)
void	setContentType(Image.Type contentType)
Image	setInput(Object value)           Set the image.

 

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

 

Field Detail

PNG_IMAGE_TYPE

public static final int PNG_IMAGE_TYPE

See Also:

Constant Field Values

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DEFAULT_IMAGE_TYPE

public static final int DEFAULT_IMAGE_TYPE

See Also:

Constant Field Values

Constructor Detail

Image

public Image()

Method Detail

setInput

public Image setInput(Object value)
               throws IOException

Set the image. This can be one of String (loaded from the classpath), a URL, a File, an InputStream or a byte[]

Parameters:

value -

Throws:

IOException

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getImage

public byte[] getImage()
                throws IOException

Get the image as a byte[], any conversions having been applied. Returns null if the image could not be read

Throws:

IOException

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getContentType

public Image.Type getContentType()

The content type of the output image, by default DEFAULT_CONTENT_TYPE

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setContentType

public void setContentType(Image.Type contentType)

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getBufferedImage

public BufferedImage getBufferedImage()

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setBufferedImage

public void setBufferedImage(BufferedImage bufferedImage)

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getRatio

public Double getRatio()
                throws IOException

The aspect ratio of the image

Throws:

IOException

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isRatio

public Boolean isRatio(double ratio,
                       double precision)
                throws IOException

Check whether the image is of a given ratio to within a given precision

Throws:

IOException

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getWidth

public Integer getWidth()
                 throws IOException

The width of the image

Throws:

IOException

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getHeight

public Integer getHeight()
                  throws IOException

The height of the image

Throws:

IOException

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adjustRatio

public Image adjustRatio(double desiredRatio,
                         double precision)
                  throws InterruptedException,
                         IOException

Alter the ratio of the output image without altering the ratio of the input by adding transparent strips. If the image is already of the correct ratio (to within the given precision) nothing happens

Throws:

InterruptedException

IOException

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blur

public Image blur(int radius)
           throws IOException

Blur the output image using a convolution

Throws:

IOException

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scaleToWidth

public Image scaleToWidth(int width)
                   throws IOException

Scale the image to the given width

Throws:

IOException

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scaleToHeight

public Image scaleToHeight(int height)
                    throws IOException

Scale the image to the given height

Throws:

IOException

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scale

public Image scale(double factor)
            throws IOException

Scale the image by the given factor

Throws:

IOException

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resize

public Image resize(int width,
                    int height)

Resize the image to the given width and height, changing the ratio if necessary

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instance

public static Image instance()

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