labelcachedefault.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

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<CODE>&nbsp;<A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/MultiPolygon.html" title="class or interface in com.vividsolutions.jts.geom">MultiPolygon</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#clipPolygon(com.vividsolutions.jts.geom.Polygon, com.vividsolutions.jts.geom.Polygon, com.vividsolutions.jts.geom.Envelope)">clipPolygon</A></B>(<A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/Polygon.html" title="class or interface in com.vividsolutions.jts.geom">Polygon</A>&nbsp;poly,
            <A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/Polygon.html" title="class or interface in com.vividsolutions.jts.geom">Polygon</A>&nbsp;bbox,
            <A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/Envelope.html" title="class or interface in com.vividsolutions.jts.geom">Envelope</A>&nbsp;displayGeomEnv)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try to do a more robust way of clipping a polygon to a bounding box. </TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#end(java.awt.Graphics2D, java.awt.Rectangle)">end</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Graphics2D.html" title="class or interface in java.awt">Graphics2D</A>&nbsp;graphics,
    <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Rectangle.html" title="class or interface in java.awt">Rectangle</A>&nbsp;displayArea)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called to indicate that the map is done rendering.  </TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#endLayer(java.awt.Graphics2D, java.awt.Rectangle)">endLayer</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Graphics2D.html" title="class or interface in java.awt">Graphics2D</A>&nbsp;graphics,
         <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/awt/Rectangle.html" title="class or interface in java.awt">Rectangle</A>&nbsp;displayArea)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called to indicate that a layer is done rendering.  </TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/LineString.html" title="class or interface in com.vividsolutions.jts.geom">LineString</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#getLongest(java.util.ArrayList)">getLongest</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/ArrayList.html" title="class or interface in java.util">ArrayList</A>&nbsp;al)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;double</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#getPriority(org.geotools.styling.TextSymbolizer, org.geotools.feature.Feature)">getPriority</A></B>(<A HREF="../../../../org/geotools/styling/TextSymbolizer.html" title="interface in org.geotools.styling">TextSymbolizer</A>&nbsp;symbolizer,
            <A HREF="../../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A>&nbsp;feature)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;get the priority from the symbolizer its an expression, so it will try to
 evaluate it: 1. if its missing --> DEFAULT_PRIORITY 2. if its a number,
 return that number 3. if its not a number, convert to string and try to
 parse the number; return the number 4. otherwise, return DEFAULT_PRIORITY</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/List.html" title="class or interface in java.util">List</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#orderedLabels()">orderedLabels</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return a list with all the values in priority order. </TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#processNodes(java.util.List, java.util.Hashtable, java.util.ArrayList)">processNodes</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/List.html" title="class or interface in java.util">List</A>&nbsp;edges,
             <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Hashtable.html" title="class or interface in java.util">Hashtable</A>&nbsp;nodes,
             <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/ArrayList.html" title="class or interface in java.util">ArrayList</A>&nbsp;result)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pull a line from the list, and: 1. if nothing connects to it (its
 issolated), add it to "result" 2. otherwise, merge it at the start/end
 with the LONGEST line there. 3. remove the original line, and the lines
 it merged with from the hashtables 4. go again, with the merged line</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#put(org.geotools.styling.TextSymbolizer, org.geotools.feature.Feature, org.geotools.renderer.lite.LiteShape2, javax.media.jai.util.Range)">put</A></B>(<A HREF="../../../../org/geotools/styling/TextSymbolizer.html" title="interface in org.geotools.styling">TextSymbolizer</A>&nbsp;symbolizer,
    <A HREF="../../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A>&nbsp;feature,
    <A HREF="../../../../org/geotools/renderer/lite/LiteShape2.html" title="class in org.geotools.renderer.lite">LiteShape2</A>&nbsp;shape,
    <A HREF="http://java.sun.com/products/java-media/jai/forDevelopers/jai-apidocs/javax/media/jai/util/Range.html" title="class or interface in javax.media.jai.util">Range</A>&nbsp;scaleRange)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Puts a TextStyle and its associated shape in the cache.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#putInNodeHash(com.vividsolutions.jts.geom.LineString, java.util.Hashtable)">putInNodeHash</A></B>(<A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/LineString.html" title="class or interface in com.vividsolutions.jts.geom">LineString</A>&nbsp;ls,
              <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Hashtable.html" title="class or interface in java.util">Hashtable</A>&nbsp;nodes)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#removeFromHash(java.util.Hashtable, com.vividsolutions.jts.geom.LineString)">removeFromHash</A></B>(<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Hashtable.html" title="class or interface in java.util">Hashtable</A>&nbsp;nodes,
               <A HREF="http://www.jump-project.org/docs/jts/1.7/api/com/vividsolutions/jts/geom/LineString.html" title="class or interface in com.vividsolutions.jts.geom">LineString</A>&nbsp;ls)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#start()">start</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called by renderer to indicate that the rendering process is starting.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#startLayer()">startLayer</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called by renderer to indication the start of rendering a layer.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/geotools/renderer/lite/LabelCacheDefault.html#stop()">stop</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tells the cache to stop labelling.</TD>
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&nbsp;<A NAME="methods_inherited_from_class_Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<TD><B>Methods inherited from class <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>

<!-- ============ FIELD DETAIL =========== -->

<A NAME="field_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Field Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="MIN_GOODNESS_FIT"><!-- --></A><H3>
MIN_GOODNESS_FIT</H3>
<PRE>
public double <B>MIN_GOODNESS_FIT</B></PRE>
<DL>
<DD>labels that arent this good will not be shown
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="DEFAULT_PRIORITY"><!-- --></A><H3>
DEFAULT_PRIORITY</H3>
<PRE>
public double <B>DEFAULT_PRIORITY</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>

<A NAME="labelCache"><!-- --></A><H3>
labelCache</H3>
<PRE>
protected <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Map.html" title="class or interface in java.util">Map</A> <B>labelCache</B></PRE>
<DL>
<DD>Map<label, LabelCacheItem> the label cache
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="labelCacheNonGrouped"><!-- --></A><H3>
labelCacheNonGrouped</H3>
<PRE>
protected <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/ArrayList.html" title="class or interface in java.util">ArrayList</A> <B>labelCacheNonGrouped</B></PRE>
<DL>
<DD>non-grouped labels get thrown in here*
<P>
<DL>
</DL>
</DL>
<HR>

<A NAME="DEFAULT_GROUP"><!-- --></A><H3>
DEFAULT_GROUP</H3>
<PRE>
public boolean <B>DEFAULT_GROUP</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>

<A NAME="DEFAULT_SPACEAROUND"><!-- --></A><H3>
DEFAULT_SPACEAROUND</H3>
<PRE>
public int <B>DEFAULT_SPACEAROUND</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>

<A NAME="styleFactory"><!-- --></A><H3>
styleFactory</H3>
<PRE>
protected <A HREF="../../../../org/geotools/renderer/style/SLDStyleFactory.html" title="class in org.geotools.renderer.style">SLDStyleFactory</A> <B>styleFactory</B></PRE>
<DL>
<DL>
</DL>
</DL>

<!-- ========= CONSTRUCTOR DETAIL ======== -->

<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="LabelCacheDefault()"><!-- --></A><H3>
LabelCacheDefault</H3>
<PRE>
public <B>LabelCacheDefault</B>()</PRE>
<DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
</TR>
</TABLE>

<A NAME="stop()"><!-- --></A><H3>
stop</H3>
<PRE>
public void <B>stop</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/renderer/lite/LabelCache.html" title="interface in org.geotools.renderer.lite">LabelCache</A></CODE></B></DD>
<DD>Tells the cache to stop labelling.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/renderer/lite/LabelCache.html#stop()">stop</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/renderer/lite/LabelCache.html" title="interface in org.geotools.renderer.lite">LabelCache</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="start()"><!-- --></A><H3>
start</H3>
<PRE>
public void <B>start</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/renderer/lite/LabelCache.html" title="interface in org.geotools.renderer.lite">LabelCache</A></CODE></B></DD>
<DD>Called by renderer to indicate that the rendering process is starting.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/renderer/lite/LabelCache.html#start()">start</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/renderer/lite/LabelCache.html" title="interface in org.geotools.renderer.lite">LabelCache</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>See Also:</B><DD><A HREF="../../../../org/geotools/renderer/lite/LabelCache.html#start()"><CODE>LabelCache.start()</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="startLayer()"><!-- --></A><H3>
startLayer</H3>