expression.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

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<B>Field Summary</B></FONT></TD>
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&nbsp;<A NAME="fields_inherited_from_class_ExpressionType"><!-- --></A>
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<TD><B>Fields inherited from interface <A HREF="../../../org/geotools/filter/ExpressionType.html" title="interface in org.geotools.filter">ExpressionType</A></B></TD>
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<TD><CODE><A HREF="../../../org/geotools/filter/ExpressionType.html#ATTRIBUTE">ATTRIBUTE</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#ATTRIBUTE_DOUBLE">ATTRIBUTE_DOUBLE</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#ATTRIBUTE_GEOMETRY">ATTRIBUTE_GEOMETRY</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#ATTRIBUTE_INTEGER">ATTRIBUTE_INTEGER</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#ATTRIBUTE_STRING">ATTRIBUTE_STRING</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#ATTRIBUTE_UNDECLARED">ATTRIBUTE_UNDECLARED</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#FUNCTION">FUNCTION</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#LITERAL_BOOLEAN">LITERAL_BOOLEAN</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#LITERAL_DATE">LITERAL_DATE</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#LITERAL_DOUBLE">LITERAL_DOUBLE</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#LITERAL_GEOMETRY">LITERAL_GEOMETRY</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#LITERAL_INTEGER">LITERAL_INTEGER</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#LITERAL_LONG">LITERAL_LONG</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#LITERAL_STRING">LITERAL_STRING</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#MATH_ADD">MATH_ADD</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#MATH_DIVIDE">MATH_DIVIDE</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#MATH_MULTIPLY">MATH_MULTIPLY</A>, <A HREF="../../../org/geotools/filter/ExpressionType.html#MATH_SUBTRACT">MATH_SUBTRACT</A></CODE></TD>
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<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/geotools/filter/Expression.html#accept(org.geotools.filter.FilterVisitor)">accept</A></B>(<A HREF="../../../org/geotools/filter/FilterVisitor.html" title="interface in org.geotools.filter">FilterVisitor</A>&nbsp;visitor)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I>use use <CODE>Expression.accept(ExpressionVisitor, Object)</CODE></I></TD>
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<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/geotools/filter/Expression.html#evaluate(org.geotools.feature.Feature)">evaluate</A></B>(<A HREF="../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A>&nbsp;feature)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;Evaluates the expression against an instance of <A HREF="../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature"><CODE>Feature</CODE></A>.</TD>
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<CODE>&nbsp;short</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/geotools/filter/Expression.html#getType()">getType</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I>The enumeration based type system has been replaced by a
 class based type system.</I></TD>
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<CODE>&nbsp;<A HREF="http://java.sun.com/j2se/1.4/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/geotools/filter/Expression.html#getValue(org.geotools.feature.Feature)">getValue</A></B>(<A HREF="../../../org/geotools/feature/Feature.html" title="interface in org.geotools.feature">Feature</A>&nbsp;feature)</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I>use <CODE>org.opengis.filter.expression.Expression#evaluate(Feature)</CODE></I></TD>
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<TD><B>Methods inherited from interface Expression</B></TD>
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<TD><CODE>accept, evaluate</CODE></TD>
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<A NAME="getType()"><!-- --></A><H3>
getType</H3>
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public short <B>getType</B>()</PRE>
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<DD><B>Deprecated.</B>&nbsp;<I>The enumeration based type system has been replaced by a
 class based type system.</I>
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<DD>Gets the type of this expression.
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<DT><B>Returns:</B><DD>Expression type.</DL>
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<A NAME="evaluate(org.geotools.feature.Feature)"><!-- --></A><H3>
evaluate</H3>
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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>
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