nullfilterimpl.html

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<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/filter/NullFilter.html#getNullCheckValue()">getNullCheckValue</A></CODE> in interface <CODE><A HREF="../../../org/geotools/filter/NullFilter.html" title="interface in org.geotools.filter">NullFilter</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the Expression to null check.</DL>
</DD>
</DL>
<HR>

<A NAME="getExpression()"><!-- --></A><H3>
getExpression</H3>
<PRE>
public Expression <B>getExpression</B>()</PRE>
<DL>
<DD>Returns the expression which represents the null check.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>getExpression</CODE> in interface <CODE>PropertyIsNull</CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
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<A NAME="setExpression(org.opengis.filter.expression.Expression)"><!-- --></A><H3>
setExpression</H3>
<PRE>
public void <B>setExpression</B>(Expression&nbsp;nullCheck)</PRE>
<DL>
<DD>Sets the expression which represents the null check.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="evaluate(org.geotools.feature.Feature)"><!-- --></A><H3>
evaluate</H3>
<PRE>
public boolean <B>evaluate</B>(<A HREF="../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A>&nbsp;feature)</PRE>
<DL>
<DD>Determines whether or not a given feature is 'inside' this filter.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/geotools/filter/Filter.html#evaluate(org.geotools.feature.Feature)">evaluate</A></CODE> in interface <CODE><A HREF="../../../org/geotools/filter/Filter.html" title="interface in org.geotools.filter">Filter</A></CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../org/geotools/filter/FilterAbstract.html#evaluate(org.geotools.feature.Feature)">evaluate</A></CODE> in class <CODE><A HREF="../../../org/geotools/filter/FilterAbstract.html" title="class in org.geotools.filter">FilterAbstract</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>feature</CODE> - Specified feature to examine.
<DT><B>Returns:</B><DD>Flag confirming whether or not this feature is inside the
         filter.</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>Returns a string representation of this filter.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>String representation of the null filter.</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>Compares this filter to the specified object.  Returns true  if the
 passed in object is the same as this filter.  Checks  to make sure the
 filter types, and the NullCheckValue are the same.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>obj</CODE> - - the object to compare this LikeFilter against.
<DT><B>Returns:</B><DD>true if specified object is equal to this filter; false
         otherwise.</DL>
</DD>
</DL>
<HR>

<A NAME="hashCode()"><!-- --></A><H3>
hashCode</H3>
<PRE>
public int <B>hashCode</B>()</PRE>
<DL>
<DD>Override of hashCode method.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a hash code value for this geometry filter.</DL>
</DD>
</DL>
<HR>

<A NAME="accept(org.opengis.filter.FilterVisitor, 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>(FilterVisitor&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>Used by FilterVisitors to perform some action on this filter instance.
 Typicaly used by Filter decoders, but may also be used by any thing
 which needs infomration from filter structure. Implementations should
 always call: visitor.visit(this); It is importatant that this is not
 left to a parent class unless the parents API is identical.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE>accept</CODE> in interface <CODE>Filter</CODE><DT><B>Overrides:</B><DD><CODE><A HREF="../../../org/geotools/filter/FilterAbstract.html#accept(org.opengis.filter.FilterVisitor, java.lang.Object)">accept</A></CODE> in class <CODE><A HREF="../../../org/geotools/filter/FilterAbstract.html" title="class in org.geotools.filter">FilterAbstract</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>visitor</CODE> - The visitor which requires access to this filter, the
        method must call visitor.visit(this);</DL>
</DD>
</DL>
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