org.geotools.filter
Class RecodeFunction
java.lang.Object
org.geotools.filter.RecodeFunction
- All Implemented Interfaces:
- org.opengis.filter.expression.Expression, org.opengis.filter.expression.Function
public class RecodeFunction
- extends java.lang.Object
- implements org.opengis.filter.expression.Function
This is an implemenation of the Recode function as defined by
the OGC Symbology Encoding (SE) 1.1 specification.
The Recode function provides a lookup table facility (think HashTable)
where both keys and values can be any Expression
. The first
parameter to the function specifies the source of the value to lookup,
e.g. the name of a feature property as a Literal
. The remaining
parameters define the lookup table as key:value pairs. Thus there should
be an odd number of parameters in total: the lookup value parameter plus
the set of key value pairs.
Where the lookup involves String
values, comparisons are done
case-insensitively.
If the lookup value does not match any of the keys defined this function
returns null
.
- Version:
- $Id: RecodeFunction.java 35579 2010-05-25 10:39:16Z mbedward $
- Author:
- Johann Sorel (Geomatys), Michael Bedward
Field Summary |
static org.opengis.filter.capability.FunctionName |
NAME
Make the instance of FunctionName available in a consistent spot. |
Fields inherited from interface org.opengis.filter.expression.Expression |
NIL |
Constructor Summary |
RecodeFunction()
|
RecodeFunction(java.util.List<org.opengis.filter.expression.Expression> parameters,
org.opengis.filter.expression.Literal fallback)
|
Method Summary |
java.lang.Object |
accept(org.opengis.filter.expression.ExpressionVisitor visitor,
java.lang.Object extraData)
|
java.lang.Object |
evaluate(java.lang.Object object)
|
|
evaluate(java.lang.Object object,
java.lang.Class<T> context)
|
org.opengis.filter.expression.Literal |
getFallbackValue()
|
java.lang.String |
getName()
|
java.util.List<org.opengis.filter.expression.Expression> |
getParameters()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
NAME
public static final org.opengis.filter.capability.FunctionName NAME
- Make the instance of FunctionName available in a consistent spot.
RecodeFunction
public RecodeFunction()
RecodeFunction
public RecodeFunction(java.util.List<org.opengis.filter.expression.Expression> parameters,
org.opengis.filter.expression.Literal fallback)
getName
public java.lang.String getName()
- Specified by:
getName
in interface org.opengis.filter.expression.Function
getParameters
public java.util.List<org.opengis.filter.expression.Expression> getParameters()
- Specified by:
getParameters
in interface org.opengis.filter.expression.Function
accept
public java.lang.Object accept(org.opengis.filter.expression.ExpressionVisitor visitor,
java.lang.Object extraData)
- Specified by:
accept
in interface org.opengis.filter.expression.Expression
evaluate
public java.lang.Object evaluate(java.lang.Object object)
- Specified by:
evaluate
in interface org.opengis.filter.expression.Expression
evaluate
public <T> T evaluate(java.lang.Object object,
java.lang.Class<T> context)
- Specified by:
evaluate
in interface org.opengis.filter.expression.Expression
getFallbackValue
public org.opengis.filter.expression.Literal getFallbackValue()
- Specified by:
getFallbackValue
in interface org.opengis.filter.expression.Function
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