Package com.blackrook.expression.resolver

Class EnumResolver

java.lang.Object

com.blackrook.expression.resolver.EnumResolver

All Implemented Interfaces:

ExpressionFunctionResolver

public class EnumResolver
extends Object
implements ExpressionFunctionResolver

A special kind of function resolver that wraps an Enum of ExpressionFunctionType

Author:

Matthew Tropiano

Constructor Summary

Constructors

Constructor	Description
EnumResolver(Enum<? extends ExpressionFunctionType>... en)	Creates a new resolver using a list of enum values.

Method Summary

Modifier and Type	Method	Description
boolean	containsFunctionByName(String name)	Attempts to find if this resolver has a function by its calling name.
ExpressionFunctionType	getFunctionByName(String name)	Attempts to resolve a pertinent function by its calling name.

Methods inherited from class java.lang.Object

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

Constructor Detail

EnumResolver

@SafeVarargs
public EnumResolver(Enum<? extends ExpressionFunctionType>... en)

Creates a new resolver using a list of enum values.

Parameters:

en - the list of enum values (usually Enum.values()).

Method Detail

getFunctionByName

public ExpressionFunctionType getFunctionByName(String name)

Description copied from interface: ExpressionFunctionResolver

Attempts to resolve a pertinent function by its calling name.

Names must be resolved case-insensitively!

If this returns a non-null for a function name, ExpressionFunctionResolver.containsFunctionByName(String) must NOT return false if called with that name!

The same function must be returned if this is called again with the same name!

Specified by:

getFunctionByName in interface ExpressionFunctionResolver

Parameters:

name - the name to resolve.

Returns:

a corresponding function or null for no such function.

See Also:

ExpressionFunctionResolver.containsFunctionByName(String)

containsFunctionByName

public boolean containsFunctionByName(String name)

Description copied from interface: ExpressionFunctionResolver

Attempts to find if this resolver has a function by its calling name.

Names must be resolved case-insensitively!

If this returns true for a function name, ExpressionFunctionResolver.getFunctionByName(String) must NOT return null if called with that name!

Specified by:

containsFunctionByName in interface ExpressionFunctionResolver

Parameters:

name - the name to find.

Returns:

a corresponding function or null for no such function.