Package com.github.basking2.sdsai.itrex

Class EvaluationContext

java.lang.Object

com.github.basking2.sdsai.itrex.EvaluationContext

public class EvaluationContext
extends Object

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	EvaluationContext()
	EvaluationContext(EvaluationContext parent, Iterator<?> arguments)
	EvaluationContext(Map<Object,Object> env, Map<Object,FunctionInterface<? extends Object>> functionRegistry, Iterator<?> arguments, EvaluationContext parent)

Method Summary

Modifier and Type	Method	Description
boolean	containsKey(Object key)
static EvaluationContext	functionCall(EvaluationContext ctx, Iterator<?> arguments)
Object	get(Object key)
Set<Object>	getAllFunctions()	Get all functions from this context and all parent contexts.
Iterator<?>	getArguments()
FunctionInterface<? extends Object>	getFunction(Object functionName)
void	register(Object name, FunctionInterface<? extends Object> operator)
void	set(Object key, Object value)
void	setArguments(Iterator<?> arguments)
void	update(Object key, Object value)	This is like set, but updates an already existing variable in the scope it is defined in.

Methods inherited from class java.lang.Object

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

Constructor Details

EvaluationContext

protected EvaluationContext()

EvaluationContext

public EvaluationContext(EvaluationContext parent,
 Iterator<?> arguments)

EvaluationContext

public EvaluationContext(Map<Object,Object> env,
 Map<Object,FunctionInterface<? extends Object>> functionRegistry,
 Iterator<?> arguments,
 EvaluationContext parent)

Method Details

functionCall

public static EvaluationContext functionCall(EvaluationContext ctx,
 Iterator<?> arguments)

set

public void set(Object key,
 Object value)

update

public void update(Object key,
 Object value)

This is like set, but updates an already existing variable in the scope it is defined in. A call to set will merely set the variable in the current context, and that value will be lost on exit. This is a way to create side-effects, a very not-function practice, but sometimes necessary. If the value is not found to update an exception is thrown

Parameters:

key - The key to set.

value - The value to associate with the key.

get

public Object get(Object key)

containsKey

public boolean containsKey(Object key)

register

public void register(Object name,
 FunctionInterface<? extends Object> operator)

getFunction

public FunctionInterface<? extends Object> getFunction(Object functionName)

setArguments

public void setArguments(Iterator<?> arguments)

getArguments

public Iterator<?> getArguments()

getAllFunctions

public Set<Object> getAllFunctions()

Get all functions from this context and all parent contexts.

Returns:

A set of all function identifiers that may be individually passed to getFunction(Object).