propertyexistsfunction.html

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<TD><B>Methods inherited from class <A HREF="../../../../org/geotools/filter/DefaultExpression.html" title="class in org.geotools.filter">DefaultExpression</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../org/geotools/filter/DefaultExpression.html#accept(org.geotools.filter.FilterVisitor)">accept</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#getValue(org.geotools.feature.Feature)">getValue</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#isAttributeExpression(short)">isAttributeExpression</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#isExpression(short)">isExpression</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#isFunctionExpression(short)">isFunctionExpression</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#isGeometryExpression(short)">isGeometryExpression</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#isLiteralExpression(short)">isLiteralExpression</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#isMathExpression(org.opengis.filter.expression.Expression)">isMathExpression</A>, <A HREF="../../../../org/geotools/filter/DefaultExpression.html#isMathExpression(short)">isMathExpression</A></CODE></TD>
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&nbsp;<A NAME="methods_inherited_from_class_ExpressionAbstract"><!-- --></A>
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<TD><B>Methods inherited from class <A HREF="../../../../org/geotools/filter/expression/ExpressionAbstract.html" title="class in org.geotools.filter.expression">ExpressionAbstract</A></B></TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../org/geotools/filter/expression/ExpressionAbstract.html#eval(org.geotools.filter.Expression, org.geotools.feature.Feature)">eval</A></CODE></TD>
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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>
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<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#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#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>
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<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from interface <A HREF="../../../../org/geotools/filter/Expression.html" title="interface in org.geotools.filter">Expression</A></B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../org/geotools/filter/Expression.html#accept(org.geotools.filter.FilterVisitor)">accept</A>, <A HREF="../../../../org/geotools/filter/Expression.html#getValue(org.geotools.feature.Feature)">getValue</A></CODE></TD>
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<B>Constructor Detail</B></FONT></TD>
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<A NAME="PropertyExistsFunction()"><!-- --></A><H3>
PropertyExistsFunction</H3>
<PRE>
public <B>PropertyExistsFunction</B>()</PRE>
<DL>
</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 class: <CODE><A HREF="../../../../org/geotools/filter/FunctionExpressionImpl.html" title="class in org.geotools.filter">FunctionExpressionImpl</A></CODE></B></DD>
<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><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>
</DD>
<DD><DL>

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

<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><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Boolean.html#TRUE" title="class or interface in java.lang"><CODE>Boolean.TRUE</CODE></A> if the <code>feature</code>'s
         <A HREF="../../../../org/geotools/feature/FeatureType.html" title="interface in org.geotools.feature"><CODE>FeatureType</CODE></A> contains an attribute named as the property
         name passed as this function argument, <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Boolean.html#FALSE" title="class or interface in java.lang"><CODE>Boolean.FALSE</CODE></A>
         otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(java.lang.Object)"><!-- --></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="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A>&nbsp;bean)</PRE>
<DL>
<DD><B>Description copied from class: <CODE><A HREF="../../../../org/geotools/filter/DefaultExpression.html" title="class in org.geotools.filter">DefaultExpression</A></CODE></B></DD>
<DD>This method checks if the object is an instance of <A HREF="../../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature"><CODE>Feature</CODE></A> and 
 if so, calls through to <A HREF="../../../../org/geotools/filter/DefaultExpression.html#evaluate(org.geotools.feature.Feature)"><CODE>DefaultExpression.evaluate(Feature)</CODE></A>. This is done 
 to maintain backwards compatability with previous version of Expression api 
 which depended on Feature. If the object is not an instance of feature 
 the super implementation is called.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>evaluate</CODE> in interface <CODE>Expression</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../../org/geotools/filter/DefaultExpression.html#evaluate(java.lang.Object)">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>Returns:</B><DD><A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Boolean.html#TRUE" title="class or interface in java.lang"><CODE>Boolean.TRUE</CODE></A> if the Class of the object passed as
         argument defines a property names as the property name passed as
         this function argument, following the standard Java Beans naming
         conventions for getters. <A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Boolean.html#FALSE" title="class or interface in java.lang"><CODE>Boolean.FALSE</CODE></A> otherwise.</DL>
</DD>
</DL>
<HR>

<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>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="equals(java.lang.Object)"><!-- --></A><H3>
equals</H3>
<PRE>
public boolean <B>equals</B>(<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;obj)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
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