org.geotools.filter.visitor
Class NullExpressionVisitor
Object
NullExpressionVisitor
- All Implemented Interfaces:
- ExpressionVisitor
public class NullExpressionVisitor
- extends Object
- implements ExpressionVisitor
This class does *nothing* - useful to prevent null checks in AbstractFilterVisitor.
- Author:
- Jody
Methods inherited from class Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
NullExpressionVisitor
public NullExpressionVisitor()
visit
public Object visit(NilExpression expression,
Object extraData)
- Description copied from interface:
ExpressionVisitor
- Used to visit a Expression.NIL, also called for
null
where an
expression is expected.
This is particularly useful when doing data transformations, as an example when
using a StyleSymbolizer Expression.NIL can be used to represent the default
stroke color.
- Specified by:
visit
in interface ExpressionVisitor
- Returns:
- implementation specific
visit
public Object visit(Add expression,
Object extraData)
- Specified by:
visit
in interface ExpressionVisitor
visit
public Object visit(Divide expression,
Object extraData)
- Specified by:
visit
in interface ExpressionVisitor
visit
public Object visit(Function expression,
Object extraData)
- Specified by:
visit
in interface ExpressionVisitor
visit
public Object visit(Literal expression,
Object extraData)
- Specified by:
visit
in interface ExpressionVisitor
visit
public Object visit(Multiply expression,
Object extraData)
- Specified by:
visit
in interface ExpressionVisitor
visit
public Object visit(PropertyName expression,
Object extraData)
- Specified by:
visit
in interface ExpressionVisitor
visit
public Object visit(Subtract expression,
Object extraData)
- Specified by:
visit
in interface ExpressionVisitor
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