filterfunction_distance.html

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<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/filter/FunctionExpression.html#getName()">getName</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/filter/FunctionExpression.html" title="interface in org.geotools.filter">FunctionExpression</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html#getName()">getName</A></CODE> in class <CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html" title="class in org.geotools.filter">FunctionExpressionImpl</A></CODE></DL>
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<DT><B>Returns:</B><DD>the name of the function.</DL>
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<A NAME="getArgCount()"><!-- --></A><H3>
getArgCount</H3>
<PRE>
public int <B>getArgCount</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/filter/FunctionExpression.html" title="interface in org.geotools.filter">FunctionExpression</A></CODE></B></DD>
<DD>Returns the number of arguments this <Function> requires.

   For example <Function name="strCat"> [arg1][arg2]</Function>.
   This function must have EXACTLY 2 arguments, so this function
   would return 2.

   The parser might use this information to ensure validity,
   and its also for reporting <Function> capabilities.

  NOTE: this was previously javadoc-ed incorrectly, please note
        the new definition.
  NOTE: you cannot have a function with a variable number of
        arguments.
<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><DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html#getArgCount()">getArgCount</A></CODE> in class <CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html" title="class in org.geotools.filter">FunctionExpressionImpl</A></CODE></DL>
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<DT><B>Returns:</B><DD>the number of args.</DL>
</DD>
</DL>
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<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>Description copied from interface: <CODE><A HREF="../../../../org/geotools/filter/FunctionExpression.html" title="interface in org.geotools.filter">FunctionExpression</A></CODE></B></DD>
<DD>Sets the arguments to be evaluated by this function.
<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><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html#setArgs(org.geotools.filter.Expression[])">setArgs</A></CODE> in class <CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html" title="class in org.geotools.filter">FunctionExpressionImpl</A></CODE></DL>
</DD>
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</DL>
</DD>
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<A NAME="getArgs()"><!-- --></A><H3>
getArgs</H3>
<PRE>
public <A HREF="../../../../org/geotools/filter/Expression.html" title="interface in org.geotools.filter">Expression</A>[] <B>getArgs</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/filter/FunctionExpression.html" title="interface in org.geotools.filter">FunctionExpression</A></CODE></B></DD>
<DD>Gets the arguments to be evaluated by this function.
<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><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html#getArgs()">getArgs</A></CODE> in class <CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html" title="class in org.geotools.filter">FunctionExpressionImpl</A></CODE></DL>
</DD>
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</DL>
</DD>
</DL>
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<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/String.html" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
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</DL>
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</DL>
</DD>
</DL>
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<A NAME="evaluate(org.geotools.feature.Feature)"><!-- --></A><H3>
evaluate</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>evaluate</B>(<A HREF="../../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A>&nbsp;feature)</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../org/geotools/filter/Expression.html" title="interface in org.geotools.filter">Expression</A></CODE></B></DD>
<DD>Evaluates the expression against an instance of <A HREF="../../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature"><CODE>Feature</CODE></A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../org/geotools/filter/Expression.html#evaluate(org.geotools.feature.Feature)">evaluate</A></CODE> in interface <CODE><A HREF="../../../../org/geotools/filter/Expression.html" title="interface in org.geotools.filter">Expression</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/filter/DefaultExpression.html#evaluate(org.geotools.feature.Feature)">evaluate</A></CODE> in class <CODE><A HREF="../../../../org/geotools/filter/DefaultExpression.html" title="class in org.geotools.filter">DefaultExpression</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>feature</CODE> - Specified feature to use when returning value.
<DT><B>Returns:</B><DD>The value of this expression based on the feature.</DL>
</DD>
</DL>
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