functionexpressionimpl.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

 itself we relax the 'final' restriction of this deprecated method.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/filter/FunctionExpression.html#getArgs()">getArgs</A></CODE> in interface <CODE><A HREF="../../../org/geotools/filter/FunctionExpression.html" title="interface in org.geotools.filter">FunctionExpression</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>an array of the args to be evaluated.</DL>
</DD>
</DL>
<HR>

<A NAME="setArgs(org.geotools.filter.Expression[])"><!-- --></A><H3>
setArgs</H3>
<PRE>
public void <B>setArgs</B>(<A HREF="../../../org/geotools/filter/Expression.html" title="interface in org.geotools.filter">Expression</A>[]&nbsp;args)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>use <A HREF="../../../org/geotools/filter/FunctionExpressionImpl.html#setParameters(java.util.List)"><CODE>setParameters(List)</CODE></A></I>
<P>
<DD>Since this class is heavily subclassed within the geotools toolkit 
 itself we relax the 'final' restriction of this deprecated method.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/filter/FunctionExpression.html#setArgs(org.geotools.filter.Expression[])">setArgs</A></CODE> in interface <CODE><A HREF="../../../org/geotools/filter/FunctionExpression.html" title="interface in org.geotools.filter">FunctionExpression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>args</CODE> - an array of expressions to be evaluated.</DL>
</DD>
</DL>
<HR>

<A NAME="getArgCount()"><!-- --></A><H3>
getArgCount</H3>
<PRE>
public abstract int <B>getArgCount</B>()</PRE>
<DL>
<DD>Gets the number of arguments that are set.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/filter/FunctionExpression.html#getArgCount()">getArgCount</A></CODE> in interface <CODE><A HREF="../../../org/geotools/filter/FunctionExpression.html" title="interface in org.geotools.filter">FunctionExpression</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the number of args.</DL>
</DD>
</DL>
<HR>

<A NAME="accept(org.opengis.filter.expression.ExpressionVisitor, java.lang.Object)"><!-- --></A><H3>
accept</H3>
<PRE>
public <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>accept</B>(ExpressionVisitor&nbsp;visitor,
                     <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;extraData)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../org/geotools/filter/expression/ExpressionAbstract.html" title="class in org.geotools.filter.expression">ExpressionAbstract</A></CODE></B></DD>
<DD>Subclass should override, default implementation just returns extraData
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>accept</CODE> in interface <CODE>Expression</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../org/geotools/filter/expression/ExpressionAbstract.html#accept(org.opengis.filter.expression.ExpressionVisitor, java.lang.Object)">accept</A></CODE> in class <CODE><A HREF="../../../org/geotools/filter/expression/ExpressionAbstract.html" title="class in org.geotools.filter.expression">ExpressionAbstract</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>See Also:</B><DD><CODE>Expression.accept(ExpressionVisitor, Object)</CODE></DL>
</DD>
</DL>
<HR>

<A NAME="getImplementationHints()"><!-- --></A><H3>
getImplementationHints</H3>
<PRE>
public <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>getImplementationHints</B>()</PRE>
<DL>
<DD>Returns the implementation hints. The default implementation returns en empty map.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/factory/Factory.html#getImplementationHints()">getImplementationHints</A></CODE> in interface <CODE><A HREF="../../../org/geotools/factory/Factory.html" title="interface in org.geotools.factory">Factory</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>The map of hints, or an <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/util/Collections.html#EMPTY_MAP" title="class or interface in java.util">empty map</A>
         if none.</DL>
</DD>
</DL>
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