deferredplanarimage.html

Geotools是一个开源的Java GIS工具包,可利用它来开发符合标准的地理信息系统。Geotools提供了OGC(Open Geospatial Consortium)规范的一个实现来作为他们的

                                      int&nbsp;tileY)</PRE>
<DL>
<DD>Checks out a tile for writing. Since  are not really
 writable, this method throws an <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang"><CODE>UnsupportedOperationException</CODE></A>.
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<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#getWritableTile(int, int)" title="class or interface in java.awt.image">getWritableTile</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
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<A NAME="releaseWritableTile(int, int)"><!-- --></A><H3>
releaseWritableTile</H3>
<PRE>
public void <B>releaseWritableTile</B>(int&nbsp;tileX,
                                int&nbsp;tileY)</PRE>
<DL>
<DD>Relinquishes the right to write to a tile. Since  are
 not really writable, this method throws an <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang"><CODE>IllegalStateException</CODE></A> (the state is
 really illegal since <A HREF="../../../org/geotools/image/DeferredPlanarImage.html#getWritableTile(int, int)"><CODE>getWritableTile(int, int)</CODE></A> should never have succeeded).
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#releaseWritableTile(int, int)" title="class or interface in java.awt.image">releaseWritableTile</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
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<A NAME="hasTileWriters()"><!-- --></A><H3>
hasTileWriters</H3>
<PRE>
public boolean <B>hasTileWriters</B>()</PRE>
<DL>
<DD>Returns whether any tile is checked out for writing.
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<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#hasTileWriters()" title="class or interface in java.awt.image">hasTileWriters</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
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<A NAME="isTileWritable(int, int)"><!-- --></A><H3>
isTileWritable</H3>
<PRE>
public boolean <B>isTileWritable</B>(int&nbsp;tileX,
                              int&nbsp;tileY)</PRE>
<DL>
<DD>Returns whether a tile is currently checked out for writing.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#isTileWritable(int, int)" title="class or interface in java.awt.image">isTileWritable</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
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<A NAME="getWritableTileIndices()"><!-- --></A><H3>
getWritableTileIndices</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Point.html" title="class or interface in java.awt">Point</A>[] <B>getWritableTileIndices</B>()</PRE>
<DL>
<DD>Returns an array of <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Point.html" title="class or interface in java.awt"><CODE>Point</CODE></A> objects indicating which tiles are
 checked out for writing. Returns null if none are checked out.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#getWritableTileIndices()" title="class or interface in java.awt.image">getWritableTileIndices</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
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<A NAME="setData(java.awt.image.Raster)"><!-- --></A><H3>
setData</H3>
<PRE>
public void <B>setData</B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/Raster.html" title="class or interface in java.awt.image">Raster</A>&nbsp;r)</PRE>
<DL>
<DD>Sets a rectangle of the image to the contents of the raster. Since
  are not really writable, this method
 throws an <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/UnsupportedOperationException.html" title="class or interface in java.lang"><CODE>UnsupportedOperationException</CODE></A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html#setData(java.awt.image.Raster)" title="class or interface in java.awt.image">setData</A></CODE> in interface <CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/image/WritableRenderedImage.html" title="class or interface in java.awt.image">WritableRenderedImage</A></CODE></DL>
</DD>
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</DL>
</DD>
</DL>
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<A NAME="dispose()"><!-- --></A><H3>
dispose</H3>
<PRE>
public void <B>dispose</B>()</PRE>
<DL>
<DD>Provides a hint that this image will no longer be accessed from a reference in user space.
 <strong>NOTE: this method dispose the image given to the constructor as well.</strong>
 This is because  is used as a "view" of an other
 image, and the user shouldn't know that he is not using directly the other image.
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