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ObjectFunctionFinder
public class FunctionFinder
Isolate function lookup code from Factory implementation(s).
This is done to look for two things:
Constructor Summary | |
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FunctionFinder(Hints hints)
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Method Summary | |
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Function |
findFunction(Name name)
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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. |
Function |
findFunction(String name)
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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. |
FunctionName |
findFunctionDescription(Name name)
Lookup the FunctionName description. |
FunctionName |
findFunctionDescription(String name)
Lookup the FunctionName description. |
List<FunctionName> |
getAllFunctionDescriptions()
Return a List of FunctionName's describing the functions currently available. |
Methods inherited from class Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public FunctionFinder(Hints hints)
Method Detail |
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public List<FunctionName> getAllFunctionDescriptions()
public FunctionName findFunctionDescription(String name)
name
- Function name; this will need to be an exact match
public FunctionName findFunctionDescription(Name name)
name
- Function name; this will need to be an exact match
public Function findFunction(String name)
public Function findFunction(Name name)
public Function findFunction(String name, List<Expression> parameters)
name
- Function name; this will need to be an exact matchparameters
- Set of parameters required
a
- RuntimeException if an implementation for name could not be foundpublic Function findFunction(Name name, List<Expression> parameters)
name
- Function name; this will need to be an exact matchparameters
- Set of parameters required
a
- RuntimeException if an implementation for name could not be foundpublic Function findFunction(String name, List<Expression> parameters, Literal fallback)
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.
name
- Function name; this will need to be an exact matchparameters
- Set of Expressions to use as function parametersfallbackValue
- Literal to use if an implementation could not be found
public Function findFunction(Name name, List<Expression> parameters, Literal fallback)
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.
name
- Function name; this will need to be an exact matchparameters
- Set of Expressions to use as function parametersfallbackValue
- Literal to use if an implementation could not be found
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