Package org.geotools.filter
Class FunctionFinder
- Object
-
- FunctionFinder
-
public class FunctionFinder extends Object
Isolate function lookup code from Factory implementation(s).This is done to look for two things:
- org.geotools.filter.Function
- org.geotools.api.filter.expression.Function
- Author:
- Jody Garnett
-
-
Constructor Summary
Constructors Constructor Description FunctionFinder(Hints hints)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Function
findFunction(String name)
Function
findFunction(String name, List<Expression> parameters)
Look up a function for the provided name.Function
findFunction(String name, List<Expression> parameters, Literal fallback)
Look up a function for the provided name, may return a FallbackFunction if an implementation could not be found.Function
findFunction(Name name)
Function
findFunction(Name name, List<Expression> parameters)
Look up a function for the provided name.Function
findFunction(Name name, List<Expression> parameters, Literal fallback)
Look up a function for the provided name, may return a FallbackFunction if an implementation could not be found.FunctionName
findFunctionDescription(String name)
Lookup the FunctionName description.FunctionName
findFunctionDescription(Name name)
Lookup the FunctionName description.List<FunctionName>
getAllFunctionDescriptions()
Return a List of FunctionName's describing the functions currently available.
-
-
-
Constructor Detail
-
FunctionFinder
public FunctionFinder(Hints hints)
-
-
Method Detail
-
getAllFunctionDescriptions
public List<FunctionName> getAllFunctionDescriptions()
Return a List of FunctionName's describing the functions currently available.- Returns:
- List describing available functions
-
findFunctionDescription
public FunctionName findFunctionDescription(String name)
Lookup the FunctionName description.- Parameters:
name
- Function name; this will need to be an exact match- Returns:
- FunctioName description, or null if function is not available
-
findFunctionDescription
public FunctionName findFunctionDescription(Name name)
Lookup the FunctionName description.- Parameters:
name
- Function name; this will need to be an exact match- Returns:
- FunctioName description, or null if function is not available
-
findFunction
public Function findFunction(String name, List<Expression> parameters)
Look up a function for the provided name.- Parameters:
name
- Function name; this will need to be an exact matchparameters
- Set of parameters required- Returns:
- Generated function
- Throws:
a
- RuntimeException if an implementation for name could not be found
-
findFunction
public Function findFunction(Name name, List<Expression> parameters)
Look up a function for the provided name.- Parameters:
name
- Function name; this will need to be an exact matchparameters
- Set of parameters required- Returns:
- Generated function
- Throws:
a
- RuntimeException if an implementation for name could not be found
-
findFunction
public Function findFunction(String name, List<Expression> parameters, Literal fallback)
Look up a function for the provided name, may return a FallbackFunction if an implementation could not be found.You can create a function to represent an SQL function or a function hosted on an external service; the fallback value will be used if you evulate by a Java implementation on the classpath.
- Parameters:
name
- Function name; this will need to be an exact matchparameters
- Set of Expressions to use as function parametersfallback
- Literal to use if an implementation could not be found- Returns:
- Function for the provided name, may be a FallbackFunction if an implementation could not be found
-
findFunction
public Function findFunction(Name name, List<Expression> parameters, Literal fallback)
Look up a function for the provided name, may return a FallbackFunction if an implementation could not be found.You can create a function to represent an SQL function or a function hosted on an external service; the fallback value will be used if you evulate by a Java implementation on the classpath.
- Parameters:
name
- Function name; this will need to be an exact matchparameters
- Set of Expressions to use as function parametersfallback
- Literal to use if an implementation could not be found- Returns:
- Function for the provided name, may be a FallbackFunction if an implementation could not be found
-
-