io.druid.math.expr

Class ExprMacroTable

java.lang.Object

io.druid.math.expr.ExprMacroTable

Direct Known Subclasses:

GuiceExprMacroTable

public class ExprMacroTable
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ExprMacroTable.ExprMacro

Constructor Summary

Constructors

Constructor and Description
ExprMacroTable(List<ExprMacroTable.ExprMacro> macros)

Method Summary

Modifier and Type	Method and Description
Expr	get(String functionName, List<Expr> args) Returns an expr corresponding to a function call if this table has an entry for functionName.
static ExprMacroTable	nil()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExprMacroTable

public ExprMacroTable(List<ExprMacroTable.ExprMacro> macros)

Method Detail

nil

public static ExprMacroTable nil()

get

@Nullable
public Expr get(String functionName,
                          List<Expr> args)

Returns an expr corresponding to a function call if this table has an entry for functionName. Otherwise, returns null.

Parameters:

functionName - function name

args - function arguments

Returns:

expr for this function call, or null