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java.lang.Objectcom.hp.hpl.jena.sparql.function.FunctionBase
public abstract class FunctionBase
Interface to value-testing extensions to the expression evaluator.
Constructor Summary | |
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FunctionBase()
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Method Summary | |
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void |
build(String uri,
ExprList args)
Called during query plan construction immediately after the construction of the extension instance. |
abstract void |
checkBuild(String uri,
ExprList args)
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NodeValue |
exec(Binding binding,
ExprList args,
String uri,
FunctionEnv env)
Test a list of values - argument will not be null but may have the wrong number of arguments. |
abstract NodeValue |
exec(List<NodeValue> args)
Function call to a list of evaluated argument values |
Context |
getContext()
Return the Context object for this execution |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public FunctionBase()
Method Detail |
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public final void build(String uri, ExprList args)
Function
build
in interface Function
args
- The parsed arguementspublic NodeValue exec(Binding binding, ExprList args, String uri, FunctionEnv env)
Function
exec
in interface Function
binding
- The current solutionargs
- A list of unevaluated expressionsuri
- The name of thisenv
- The execution context
public Context getContext()
public abstract NodeValue exec(List<NodeValue> args)
public abstract void checkBuild(String uri, ExprList args)
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