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## org.apache.batik.ext.awt.image.renderable
Class AbstractRable

    java.lang.Object
      org.apache.batik.ext.awt.image.renderable.AbstractRable

All Implemented Interfaces:
  Filter, java.awt.image.renderable.RenderableImage

Direct Known Subclasses:
  AbstractColorInterpolationRable, AffineRable8Bit, BackgroundRable8Bit, ClipRable8Bit, FilterAlphaRable, FilterAsAlphaRable, FilterChainRable8Bit, FilterResRable8Bit, FloodRable8Bit, GraphicsNodeRable8Bit, MaskRable8Bit, MorphologyRable8Bit, PadRable8Bit, ProfileRable, RedRable

public abstract class AbstractRable
extends java.lang.Object
implements Filter

This is an abstract base class that takes care of most of the normal issues surrounding the implementation of the RenderableImage interface. It tries to make no assumptions about the subclass implementation.

Field Summary
`protected java.util.Map` | `props`
`protected java.util.Vector` | `srcs`
`protected long` | `stamp`

Fields inherited from interface java.awt.image.renderable.RenderableImage
`HINTS_OBSERVED`

Constructor Summary
`protected` | `AbstractRable()` void constructor.
`protected` | `AbstractRable(Filter src)` Construct an Abstract Rable from src.
`protected` | `AbstractRable(Filter src, java.util.Map props)` Construct an Abstract Rable from src and props.
`protected` | `AbstractRable(java.util.List srcs)` Construct an Abstract Rable from a list of sources.
`protected` | `AbstractRable(java.util.List srcs, java.util.Map props)` Construct an Abstract Rable from a list of sources, and bounds.

Method Summary
`java.awt.image.RenderedImage` | `createDefaultRendering()`
`java.awt.image.RenderedImage` | `createScaledRendering(int w, int h, java.awt.RenderingHints hints)`
`java.awt.geom.Rectangle2D` | `getBounds2D()` Returns the bounds of the current image.
`java.awt.Shape` | `getDependencyRegion(int srcIndex, java.awt.geom.Rectangle2D outputRgn)` Returns the region of input data is is required to generate outputRgn.
`java.awt.Shape` | `getDirtyRegion(int srcIndex, java.awt.geom.Rectangle2D inputRgn)` This calculates the region of output that is affected by a change in a region of input.
`float` | `getHeight()`
`float` | `getMinX()`
`float` | `getMinY()`
`java.lang.Object` | `getProperty(java.lang.String name)`
`java.lang.String[]` | `getPropertyNames()`
`java.util.Vector` | `getSources()`
`long` | `getTimeStamp()` Returns the current modification timestamp on this Renderable node.
`float` | `getWidth()`
`protected void` | `init(Filter src)` Initialize an Abstract Rable from src, bounds and props.
`protected void` | `init(Filter src, java.util.Map props)` Initialize an Abstract Rable from src, bounds and props.
`protected void` | `init(java.util.List srcs)` Initialize an Abstract Rable from a list of sources, and possibly a bounds.
`protected void` | `init(java.util.List srcs, java.util.Map props)` Initialize an Abstract Rable from a list of sources, and possibly a bounds.
`boolean` | `isDynamic()`
`void` | `touch()` Increments the time stamp.

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

Methods inherited from interface java.awt.image.renderable.RenderableImage
`createRendering`

Field Detail

### srcs

    protected java.util.Vector srcs

### props

    protected java.util.Map props

### stamp

    protected long stamp

Constructor Detail

### AbstractRable

    protected AbstractRable()

  void constructor. The subclass must call one of the flavors of init before the object becomes usable. This is useful when the proper parameters to the init method need to be computed in the subclasses constructor.

### AbstractRable

    protected AbstractRable(Filter src)

  Construct an Abstract Rable from src.

Parameters:
  `src` - will be the first (and only) member of the srcs Vector. The bounds of src are also used to set the bounds of this renderable.

### AbstractRable

    protected AbstractRable(Filter src,
                            java.util.Map props)

  Construct an Abstract Rable from src and props.

Parameters:
  `src` - will also be set as the first (and only) member of the srcs Vector.
  `props` - use to initialize the properties on this renderable image.

### AbstractRable

    protected AbstractRable(java.util.List srcs)

  Construct an Abstract Rable from a list of sources.

Parameters:
  `srcs` - This is used to initialize the srcs Vector. The bounds of this renderable will be the union of the bounds of all the sources in srcs. All the members of srcs must be CacheableRable otherwise an error will be thrown.

### AbstractRable

    protected AbstractRable(java.util.List srcs,
                            java.util.Map props)

  Construct an Abstract Rable from a list of sources, and bounds.

Parameters:
  `srcs` - This is used to initialize the srcs Vector. All the members of srcs must be CacheableRable otherwise an error will be thrown.
  `props` - use to initialize the properties on this renderable image.

Method Detail

### touch

    public final void touch()

  Increments the time stamp. This should be called when ever the image changes in such a way that cached output should be discarded.

### getTimeStamp

    public long getTimeStamp()

  Returns the current modification timestamp on this Renderable node. This value will change whenever cached output data becomes invalid.

  Specified by:
    `getTimeStamp` in interface `Filter`
  Returns:
    Current modification timestamp value.

### init

    protected void init(Filter src)

  Initialize an Abstract Rable from src, bounds and props. This can be called long after the object is constructed to reset the state of the Renderable.

  Parameters:
    `src` - will become the first (and only) member of the srcs Vector.

### init

    protected void init(Filter src,
                        java.util.Map props)

  Initialize an Abstract Rable from src, bounds and props. This can be called long after the object is constructed to reset the state of the Renderable.

  Parameters:
    `src` - will also be set as the first (and only) member of the srcs Vector.
    `props` - use to set the properties on this renderable image. Always clears the current properties (even if null).

### init

    protected void init(java.util.List srcs)

  Initialize an Abstract Rable from a list of sources, and possibly a bounds. This can be called long after the object is constructed to reset the state of the Renderable.

  Parameters:
    `srcs` - Used the create a new srcs Vector (old sources are dropped).

### init

    protected void init(java.util.List srcs,
                        java.util.Map props)

  Initialize an Abstract Rable from a list of sources, and possibly a bounds. This can be called long after the object is constructed to reset the state of the Renderable.

  Parameters:
    `srcs` - Used the create a new srcs Vector (old sources are dropped).
    `props` - use to set the properties on this renderable image. Always clears the current properties (even if null).

### getBounds2D

    public java.awt.geom.Rectangle2D getBounds2D()

  Description copied from interface: `Filter`
  Returns the bounds of the current image. This should be 'in sync' with getMinX, getMinY, getWidth, getHeight

  Specified by:
    `getBounds2D` in interface `Filter`

### getSources

    public java.util.Vector getSources()

  Specified by:
    `getSources` in interface `java.awt.image.renderable.RenderableImage`

### createDefaultRendering

    public java.awt.image.RenderedImage createDefaultRendering()

  Specified by:
    `createDefaultRendering` in interface `java.awt.image.renderable.RenderableImage`

### createScaledRendering

    public java.awt.image.RenderedImage createScaledRendering(int w,
                                                              int h,
                                                              java.awt.RenderingHints hints)

  Specified by:
    `createScaledRendering` in interface `java.awt.image.renderable.RenderableImage`

### getMinX

    public float getMinX()

  Specified by:
    `getMinX` in interface `java.awt.image.renderable.RenderableImage`

### getMinY

    public float getMinY()

  Specified by:
    `getMinY` in interface `java.awt.image.renderable.RenderableImage`

### getWidth

    public float getWidth()

  Specified by:
    `getWidth` in interface `java.awt.image.renderable.RenderableImage`

### getHeight

    public float getHeight()

  Specified by:
    `getHeight` in interface `java.awt.image.renderable.RenderableImage`

### getProperty

    public java.lang.Object getProperty(java.lang.String name)

  Specified by:
    `getProperty` in interface `java.awt.image.renderable.RenderableImage`

### getPropertyNames

    public java.lang.String[] getPropertyNames()

  Specified by:
    `getPropertyNames` in interface `java.awt.image.renderable.RenderableImage`

### isDynamic

    public boolean isDynamic()

  Specified by:
    `isDynamic` in interface `java.awt.image.renderable.RenderableImage`

### getDependencyRegion

    public java.awt.Shape getDependencyRegion(int srcIndex,
                                              java.awt.geom.Rectangle2D outputRgn)

  Description copied from interface: `Filter`
  Returns the region of input data is is required to generate outputRgn.

  Specified by:
    `getDependencyRegion` in interface `Filter`
  Parameters:
    `srcIndex` - The source to do the dependency calculation for.
    `outputRgn` - The region of output you are interested in generating dependencies for. The is given in the user coordiate system for this node.
  Returns:
    The region of input required. This is in the user coordinate system for the source indicated by srcIndex.

### getDirtyRegion

    public java.awt.Shape getDirtyRegion(int srcIndex,
                                         java.awt.geom.Rectangle2D inputRgn)

  Description copied from interface: `Filter`
  This calculates the region of output that is affected by a change in a region of input.

  Specified by:
    `getDirtyRegion` in interface `Filter`
  Parameters:
    `srcIndex` - The input that inputRgn reflects changes in.
    `inputRgn` - the region of input that has changed, used to calculate the returned shape. This is given in the user coordinate system of the source indicated by srcIndex.
  Returns:
    The region of output that would be invalid given a change to inputRgn of the source selected by srcIndex. this is in the user coordinate system of this node.

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Copyright © 2004 Apache Software Foundation. All Rights Reserved.