defaultexpression.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

<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;object)</PRE>
<DL>
<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>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/expression/ExpressionAbstract.html#evaluate(java.lang.Object)">evaluate</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>
</DL>
</DD>
</DL>
<HR>

<A NAME="accept(org.geotools.filter.FilterVisitor)"><!-- --></A><H3>
accept</H3>
<PRE>
public final void <B>accept</B>(<A HREF="../../../org/geotools/filter/FilterVisitor.html" title="interface in org.geotools.filter">FilterVisitor</A>&nbsp;visitor)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>use <CODE>Expression.accept(ExpressionVisitor, Object)</CODE></I>
<P>
<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>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><A HREF="../../../org/geotools/filter/Expression.html#accept(org.geotools.filter.FilterVisitor)">accept</A></CODE> in interface <CODE><A HREF="../../../org/geotools/filter/Expression.html" title="interface in org.geotools.filter">Expression</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>
<HR>

<A NAME="isAttributeExpression(short)"><!-- --></A><H3>
isAttributeExpression</H3>
<PRE>
protected static boolean <B>isAttributeExpression</B>(short&nbsp;expressionType)</PRE>
<DL>
<DD>Checks to see if passed type is attribute.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>expressionType</CODE> - Type of expression for check.
<DT><B>Returns:</B><DD>Whether or not this is an attribute expression type.</DL>
</DD>
</DL>
<HR>

<A NAME="isMathExpression(short)"><!-- --></A><H3>
isMathExpression</H3>
<PRE>
protected static boolean <B>isMathExpression</B>(short&nbsp;expressionType)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>use <CODE>#is</CODE></I>
<P>
<DD>Checks to see if passed type is math.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>expressionType</CODE> - Type of expression for check.
<DT><B>Returns:</B><DD>Whether or not this is a math expression type.</DL>
</DD>
</DL>
<HR>

<A NAME="isMathExpression(org.opengis.filter.expression.Expression)"><!-- --></A><H3>
isMathExpression</H3>
<PRE>
protected static boolean <B>isMathExpression</B>(Expression&nbsp;expression)</PRE>
<DL>
<DD>Checks to see if this expression is a math expresson based on its type.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>expression</CODE> - expression to check.
<DT><B>Returns:</B><DD>Whether or not this is a math expression.</DL>
</DD>
</DL>
<HR>

<A NAME="isLiteralExpression(short)"><!-- --></A><H3>
isLiteralExpression</H3>
<PRE>
protected static boolean <B>isLiteralExpression</B>(short&nbsp;expressionType)</PRE>
<DL>
<DD>Checks to see if passed type is geometry.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>expressionType</CODE> - Type of expression for check.
<DT><B>Returns:</B><DD>Whether or not this is a geometry expression type.</DL>
</DD>
</DL>
<HR>

<A NAME="isGeometryExpression(short)"><!-- --></A><H3>
isGeometryExpression</H3>
<PRE>
protected static boolean <B>isGeometryExpression</B>(short&nbsp;expressionType)</PRE>
<DL>
<DD>Checks to see if passed type is geometry.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>expressionType</CODE> - Type of expression for check.
<DT><B>Returns:</B><DD>Whether or not this is a geometry expression type.</DL>
</DD>
</DL>
<HR>

<A NAME="isExpression(short)"><!-- --></A><H3>
isExpression</H3>
<PRE>
protected static boolean <B>isExpression</B>(short&nbsp;expressionType)</PRE>
<DL>
<DD>Checks to see if passed type is geometry.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>expressionType</CODE> - Type of expression for check.
<DT><B>Returns:</B><DD>Whether or not this is a geometry expression type.</DL>
</DD>
</DL>
<HR>

<A NAME="isFunctionExpression(short)"><!-- --></A><H3>
isFunctionExpression</H3>
<PRE>
public static boolean <B>isFunctionExpression</B>(short&nbsp;expressionType)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<!-- ========= END OF CLASS DATA ========= -->
<HR>


<!-- ======= START OF BOTTOM NAVBAR ====== -->
<A NAME="navbar_bottom"><!-- --></A>
<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A>
<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY="">
<TR>
<TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
<A NAME="navbar_bottom_firstrow"><!-- --></A>
<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY="">
  <TR ALIGN="center" VALIGN="top">
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> &nbsp;<FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="class-use/DefaultExpression.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A>&nbsp;</TD>
  <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1">    <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A>&nbsp;</TD>
  </TR>
</TABLE>
</TD>
<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
</EM>
</TD>
</TR>

<TR>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
&nbsp;<A HREF="../../../org/geotools/filter/ConstantExpression.html" title="class in org.geotools.filter"><B>PREV CLASS</B></A>&nbsp;
&nbsp;<A HREF="../../../org/geotools/filter/Expr.html" title="class in org.geotools.filter"><B>NEXT CLASS</B></A></FONT></TD>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
  <A HREF="../../../index.html" target="_top"><B>FRAMES</B></A>  &nbsp;
&nbsp;<A HREF="DefaultExpression.html" target="_top"><B>NO FRAMES</B></A>  &nbsp;
&nbsp;<SCRIPT type="text/javascript">
  <!--
  if(window==top) {
    document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>');
  }
  //-->
</SCRIPT>
<NOSCRIPT>
  <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>
</NOSCRIPT>

</FONT></TD>
</TR>
<TR>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
  SUMMARY:&nbsp;NESTED&nbsp;|&nbsp;<A HREF="#field_summary">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_summary">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_summary">METHOD</A></FONT></TD>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
DETAIL:&nbsp;<A HREF="#field_detail">FIELD</A>&nbsp;|&nbsp;<A HREF="#constructor_detail">CONSTR</A>&nbsp;|&nbsp;<A HREF="#method_detail">METHOD</A></FONT></TD>
</TR>
</TABLE>
<A NAME="skip-navbar_bottom"></A>
<!-- ======== END OF BOTTOM NAVBAR ======= -->

<HR>
Copyright &copy; 1996-2007 <a href="http://www.geotools.org">Geotools</a>. All Rights Reserved.
</BODY>
</HTML>